All posts by: Sarah Hansen, M.S. '15


500 days in space and counting—UMBC celebrates HARP2 satellite’s incoming data and resulting discoveries

For over 500 days, the Hyper-Angular Rainbow Polarimeter 2 (HARP2), a high-tech instrument built by UMBC researchers and students, has been orbiting Earth on NASA’s Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) satellite, capturing stunning data about our planet’s atmosphere, surface, and oceans. UMBC celebrated this milestone with lab tours, a poster session showcasing student research, and talks from the PACE instrument and science teams and university leadership, highlighting the instrument’s success and the hands-on role students play in this NASA mission.

“There is palpable pride on our campus in UMBC’s contributions to the PACE mission,” shares Karl V. Steiner, vice president for research and creative achievement. “Because much of the HARP2 instrument was created with strong involvement from both undergraduate and graduate students, this mission truly combines the best of our research and education missions. HARP2 is clearly a milestone in our 30-plus year partnership with NASA Goddard.’’   

man speaking from handheld microphone in classroom; people listening behind him
Karl V. Steiner, vice president for research and creative achievement, commended the HARP2 team at the celebration. (Brad Ziegler/UMBC)

HARP2’s story builds on UMBC’s earlier work with the original HARP, a pint-sized CubeSat launched in 2019 that earned the American Institute of Aeronautics and Astronautics’ SmallSat Mission of the Year award in 2021. That tiny satellite showed the world how capturing data from many angles could reveal a more complete picture of the atmospheric composition, including the roles of clouds, dust, and smoke. 

HARP2, launched in February 2024, takes HARP’s work further, collecting detailed data from a survey of the entire globe every two days. HARP2 collects in half a day the same amount of data collected by HARP in its entire two-year flight. Researchers have also enhanced data analysis methods, allowing scientists to glean even more accurate and detailed information from the raw data transmitted from space. Alongside PACE’s Ocean Color Instrument (OCI), HARP2 is helping scientists study everything from air quality to climate patterns, and painting a fuller picture of Earth’s systems.

What sets HARP2 apart is its ability to see the atmosphere in 3D-like detail, thanks to its unique “hyper-angular” views. “The instrument is working, it’s producing great data, and the community is starting to use it,” shares Vanderlei Martins, director of the Earth and Space Institute (ESI) at UMBC and the HARP team lead. Scientists across the U.S. and beyond are tapping into HARP2’s data to track pollution, measure cloud droplet properties, and more. Unlike other satellites, HARP2 can distinguish whether particles in the air are smoke, dust, or pollution, offering clues that help us understand air quality and climate impacts.

To ground-truth the data coming from HARP2, some members of the team traveled to Bolivia. They flew drones over high-altitude Lake Titicaca and the Salar de Uyuni salt flat to collect data that complements HARP2’s space-based views. With less atmosphere above them, these sites offer a clearer match to satellite observations, helping refine the science.

An “explosion” of science

Students at UMBC are deeply involved, from building and calibrating HARP2 to digging into its data. Graduate students in the atmospheric physics program work closely with faculty and NASA engineers, even on the most sensitive elements of the project. 

During testing for HARP2, “I was given the opportunity not only to see the initial calibration process, but then to see the team respond to a catastrophic failure, and then come back from it,” recalls Rachel Smith, an atmospheric physics Ph.D. student. “To watch them come together in support of the project and not miss a beat putting it back together was really incredible to see.” Early in her time with the group, Smith got to hold the instrument. “It’s a cool feeling, that I picked up and worked on this thing that’s now in space,” she says.  

Nirandi Jayasinghe, another atmospheric physics Ph.D. student, recalls the earliest data coming in.We were all here—graduate students, scientists, and engineers—in this very room, doing stuff piece by piece to visualize ‘first light’ from HARP2,” she says. “I don’t think I’ve seen this much synergy between people anywhere else.”

Over time, the team has grown to meet the rising demands of the project. “I’ve seen how the group has gone from just me, Dominik [Cieslak], Roberto [Borda], and a couple of other engineers to now three, four, five grad students at once tackling different and interesting science questions,” shares Brent McBride ’14, physics, Ph.D. ’22, atmospheric physics, who today is an instrument scientist with the ESI. “It’s been an explosion of not only the capacity of the group, but the science that we’re capable of doing.” 

“There’s huge power there”

“Because of its hyper-angular capability, there are things we can see with HARP2 that we have never seen before,” Martins explains. This includes new insights into cloud properties and aerosol types, which are critical for understanding climate and pollution. HARP2 also helps OCI see past atmospheric haze, boosting studies over land and water. 

three researchers smiling and laughing in the lab, standing around the HARP cubesat, the precursor to HARP2
Left to right: Vanderlei Martins, Roberto Borda, and Dominik Cieslak have been core members of the HARP team since its earliest days. Here they stand with the HARP cubesat, the precursor to HARP2. (Marlayna Demond ’11/UMBC)

HARP2 has been rock-steady since launch, with no major issues. It even uses the moon for monthly calibration checks to keep its data sharp. Designed for at least three years but with fuel for potentially a decade, it’s poised to keep delivering. The data is freely available, sparking discoveries worldwide. 

“HARP2 is helping us monitor and understand Earth’s systems and come up with ways to improve life,” Martins says.“We can study everything from fires to red tides and even floods, all the way from natural disasters to the effect of pollution on nature in general. There’s huge power there.” 

As the team celebrates HARP2’s more than 500 days in orbit, its steady stream of data continues to fuel discoveries that deepen our understanding of Earth’s atmosphere and oceans. From its roots as a small CubeSat to its role in NASA’s PACE mission, UMBC’s HARP2 showcases the power of collaboration among students, scientists, and NASA, driving science that informs everything from air quality forecasts to climate solutions. With years of potential ahead, HARP2’s impact is only beginning to unfold, inspiring new questions and innovations from UMBC’s campus to the global scientific community.

blue and green sheet cake that reads "500 Days and Counting" and also includes the PACE logo
Attendees enjoyed a festive cake at the 500 Days of HARP2 celebration. (Brad Zielger/UMBC)

A giant among mantis shrimp: Tom Cronin’s outsized legacy of mentorship ripples outward in visual ecology and beyond

Every biological sciences graduate student at UMBC knows “the face”—Tom Cronin’s signature scowl, which, contrary to appearances, signals rapt attention rather than disapproval. At a day-long symposium honoring Cronin’s remarkable career, alumni handed out life-sized cutouts of “the face” on sticks, which attendees waved playfully during talks, setting the tone for a joyful, family reunion-like event filled with laughter, affection, and mutual respect.

Cronin began his 43-year tenure at UMBC as an assistant professor at the young university. Over time, he became a giant in the field of visual ecology, primarily studying the enigmatic mantis shrimp. His work has helped unravel the mysteries of mantis shrimp eyes—biological marvels that still hold scientific secrets. 

On the eve of his retirement, dozens of Cronin’s colleagues and alumni traveled from all over the world to attend the symposium, and still others attended virtually or sent pre-recorded messages. Chuan-Chin Ciao, Ph.D. ’00, biological sciences, may have come the farthest, visiting from National Tsing Hua University in Taiwan. Symposium talks spanned bumblebees, fanworms, deep-sea fish, and more, showcasing the breadth of Cronin’s network. 

a lecture hall full of people holding cutouts of "the face" of Tom Cronin in front of their faces
“The face” is infamous among UMBC graduate students. Symposium organizers printed out copies for attendees to magnify its effect during the symposium. (Photo by Michelle Starz-Gaiano)

“You taught us how to be scientists”

Cronin’s mentees, many now leading their own labs around the world, shared how he had influenced their lives. Megan Porter, a former postdoctoral fellow in Cronin’s lab, thanked him for expanding her expertise in molecular biology and genetics to visual ecology. “When I came in, I had a Ph.D.; I thought I knew stuff. But at the first lab meeting, I realized I knew nothing about visual ecology,” Porter recalls. “I can’t thank him enough for bringing me into this community and giving me such a broad foundation.” Now she strives to do the same for her students as a professor at the University of Hawai’i. 

Michael Bok, Ph.D. ’13, biological sciences, shared “Cronin wisdom,” such as “Work on something ridiculously cool,” “Surround yourself with great scientists and good friends,” and “Have patience and don’t give up”—ideas Bok has carried into his work as a researcher at the University of Lund in Sweden. Kathryn Feller, Ph.D. ’14, biological sciences, the John D. MacArthur Assistant Professor of Biological Sciences at Union College, displayed a pencil drawing of a tomcat, picked up at a thrift store and mounted in the lab for the last decade. Its inscription reads, “Tom is tough, but he’s your friend”—a sentiment that reflects Cronin’s mentorship style.

group photo of Megan Porter, Michael Bok, Tom Cronin, Kate Feller outdoors on UMBC's campus
(l-r): Megan Porter, Michael Bok, Tom Cronin, and Kate Feller enjoy each other’s company after the symposium. (Photo by Michelle Starz-Gaiano)

Alex Kingston, Ph.D. ’15, biological sciences, now an assistant professor at the University of Tulsa, thanked him for supporting her growth. “Anyone can teach you how to do science, but you taught us how to be scientists,” Kingston shared. One of Cronin’s major lab instruments is moving to Kingston’s lab in Oklahoma to enrich her research program.

Cronin taught nearly 8,000 undergraduates over 86 semesters, valuing their diverse perspectives, and described UMBC as “a place you can really succeed as a young investigator.” He thanked the UMBC faculty and staff and his family for their enduring support, especially his wife, Ros. The symposium was a testament to Cronin’s legacy—a vibrant community built on curiosity, mentorship, and connection—the influence of which will ripple through generations of creative and humble scientists who are eager to enlarge our understanding of nature’s wonders. 

Learn more about UMBC graduate programs in biological sciences, or check out the beautiful Color in Nature (2024), co-authored by Tom Cronin.

a bright blue, green, red, and purple crustacean with a lot of legs and eyes on protruding stalks crawls along a seafloor
A peacock mantis shrimp, an especially colorful variety of these remarkable animals. (Richard Crook, shared under CC-BY-NC-ND 2.0)

Understanding the Tree of Life: A fresh look at evolution with biology professor Kevin Omland

Kevin Omland, professor of biological sciences, has spent 25 years teaching and researching evolution. His new book, Understanding the Tree of Life, is the latest in the “Understanding Life” series published by Cambridge University Press. Omland’s contribution challenges what he views as an outdated understanding of evolution and celebrates the interconnectedness of all species. Below, Omland shares the inspiration behind the book, its surprising insights, and why everyone from nature lovers to seasoned biologists should seek it out.

Q: How did this book come about?

A: Cambridge University Press wanted a book diving into the history of life and how all species are connected. A few of my colleagues recommended me based on my prior work, including a 2007 article called Tree Thinking for All Biology from my sabbatical in Australia, and a chapter I wrote for The Princeton Guide to Evolution emphasizing how understanding evolutionary trees is central to understanding evolution. My research on bird plumage and birdsong has also given me a fresh perspective on evolution, so I was happy to accept the opportunity to write this book. 

Q: You’ve been teaching at UMBC since 2000—did that shape the book at all?

A: Absolutely. Teaching “Foundations of Biology: Ecology and Evolution” for 25 years at UMBC played a huge role. I’ve had so many smart students come in with big misconceptions about evolution—like thinking humans are the top of an evolutionary “ladder.” The book is packed with examples I’ve used in class to show that we’re all cousins, with no “higher” or “lower” organisms. I wouldn’t have been in a position to write this without all of those classroom conversations, so I want to thank my students for their indirect contributions to this book. 

Q: Who is this book for, and why should they pick it up?

A: Anyone who finds evolution fascinating or loves nature should read it for a fresh angle on how every species on the planet is interconnected. It surveys the tree of life, including everything from primates to invertebrates, challenging outdated concepts like “primitive” species. Even biologists might find some ideas that challenge their understanding—I’d guess that up to half of them might be surprised by what they learn! Ultimately, it’s for general readers and scientists alike who want to think accurately about evolution as a branching tree, rather than a straight line toward ever-more complexity. 

Kevin Omland, a professor, and a group of three college students gather, one holding a small bird, blue sky and lush forest in background tree of life
(l-r): Nathan Zekarias ’25, biological sciences; Michelle Moyer, Ph.D. ’24, biological sciences; Ellie Bare ’23, biochemistry and molecular biology; and Kevin Omland (left to right) on a field research trip to Puerto Rico. Omland creates numerous opportunities for his students to get field experience. (Image courtesy of Omland)

Q: What were you hoping to achieve with this book?

A: My main goal is to debunk misconceptions, like human superiority or labeling species as “old” or “living fossils.” Using DNA sequencing and modern genomics, we can now see evolution as continuous, with no clear start to any species, including humans. I want readers to move beyond ideas like the great white shark as ancient or humans as a recent arrival. The book emphasizes shared ancestry—we’re all cousins, from our fellow mammals, to trees, to bacteria—and encourages caring for our interconnected world.

Q: Can you give us an example from the book that flips a common evolution myth?

A: Sure—the platypus is my go-to. People call them “primitive” because they lay eggs, a trait inherited from our ancient tetrapod [four-legged] ancestors. But that’s biased and misleading—the platypus has many recent adaptations like its duck-shaped bill with electro-sensing organs to detect prey in muddy ponds, venomous spurs on males, and webbed feet for underwater swimming. Every organism mixes ancient traits with recent specialized ones matching its ecological niche. This challenges human-centered views: We lack the platypus’s senses, just as it lacks our thumbs or large brains.

two baby platypuses, only the size of a human hand, being held tree of life
Baby platypuses show off their electro-sensing bills, which are a more recent adaptation, countering assumptions that platypuses are “primitive” because they lay eggs. (Photo by NSW DPI, used under CC-BY-NC-SA 2.0)

Q: How does this book tie into your other research?

A: It ties directly to all the work that my students and I have done on bird plumage and song evolution, which highlights gains and losses of traits; evolution isn’t just accumulation or increasing complexity. For example, tetrapods evolved legs, but many lineages, like snakes and whales, later lost them. Our research shows losses are common and as important as gains, countering dictionary definitions of evolution as “gradual accumulation.” The book extends this lens to the whole tree of life, using genomic insights to reframe how we understand shared ancestry and adaptation.

Q: Where and when can I get my copy?

A: It’s available now! You can order Understanding the Tree of Life from Cambridge University Press, major online retailers or your local bookstore—shops as far away as Norway and Brazil have it on their websites and shelves. Just search for it, as they say, “wherever books are sold.” I hope people enjoy reading it!

Kevin Omland and a group of two college students gather at a summit; green islands, blue water, and a wispy light blue sky in background tree of live
(l-r): Eriberto Osorio ’22, biological sciences; D’Juan Moreland ’24, biological sciences and music composition; and Kevin Omland in Puerto Rico for field research. (Image courtesy of Omland)

Explore or exploit: Research with robotics and medical applications that decodes animal decision-making earns NIH grant 

A glass knifefish darts back and forth in a short tube, its brain activity being recorded in real time. This small fish, alternating between swift bursts of sensing activity and slower, task-driven behaviors, is helping scientists understand how animals decide when to gather information about their environment versus act on it. A team of researchers is blending neuroscience, math, and engineering to decode these choices, with potential to guide robots in uncertain terrains or unlock secrets of the brain.

The team’s research has just been funded by the Collaborative Research in Computational Neuroscience (CRCNS) program—a joint initiative of the National Institutes of Health (NIH) and the National Science Foundation (NSF) that supports interdisciplinary research. Kathleen Hoffman, professor of mathematics and statistics, co-leads the grant.

The CRCNS program emphasizes collaborative efforts to advance understanding of nervous system functions through computational tools. With the lead investigator at Johns Hopkins University and additional collaborators at the New Jersey Institute of Technology (NJIT), and the University of Minnesota, the team for the newly funded project spans biology, engineering, mathematics, and computer science—a mix well-positioned to discover deeper insights into brain mechanisms.

portrait of woman sitting in armchair
Kathleen Hoffman is leading data analysis for the newly funded project. (Courtesy of Hoffman)

‘Explore’ or ‘exploit’?

The new project builds on the same team’s prior research, published in 2023 in Nature Machine Intelligence, which revealed similar decision-making patterns across species, from amoebas to humans. In that work, the team analyzed the behavior of glass knifefish—weakly electric fish that navigate dark waters using self-generated electric fields—in experiments run by Noah Cowan, the lead investigator for the new grant. Then they compared their findings to the behavior of other species as described in the scientific literature, uncovering similar patterns in 11 species, including bats, mice, moths, and humans.

In the prior work, “We looked at velocity distributions, and we found that there were two modes of movement. We called them ‘explore’ and ‘exploit,’ but you could also describe them as ‘fast’ and ‘slow,’” Hoffman explains. During experiments in narrow tubes, the fish alternated between two modes: rapid, exploratory movements to sense their surroundings (“explore”) and slower, deliberate actions using the information they’d collected (“exploit”).

That research challenged robotics norms, showing that animals don’t constantly scan their environment, but rather burst into action when needed, a strategy the team showed is both more economical and more effective. The new project ramps up data collection—from 40 seconds per trial to 10 minutes—allowing the team to reveal subtler patterns, like burst lengths and correlations between the fish’s movement mode and its position in the tube.

a partially transparent fish swimming, black background
This glass knifefish is participating in the team’s experiments, which involves measuring the velocity of the fish’s movements. (Courtesy of Noah Cowan)

Deciphering animal decisions

A primary goal is to uncover what prompts the mode switch. “How does it decide when to switch? And the hypothesis that we’re considering is that it’s based on some internal measure of uncertainty in the fish, meaning that if the fish isn’t sure if it’s inside the tube, it’s going to move so it can gather sensory information,” Hoffman says.

To test this, the team integrates several methods. At the University of Minnesota, engineers led by Andrew Lamperski will apply machine learning to map relationships between sensory inputs and behavioral outputs in the form of mathematical functions. Hoffman handles data analysis, starting with manual pattern-spotting before coding. 

“I can’t wait to get my hands on the data,” Hoffman says. She’ll start by simply printing out the velocity and position results and poring over them visually. “I don’t think there’s anything better than the human brain to see patterns, and mathematics is the study of patterns,” she adds. After observing what looks like a pattern, she’ll bounce her ideas off the rest of the team, and eventually “go write a program to automatically go through all the data and see if that pattern recurs.” 

A boon for the project comes from NJIT, where biologist Eric Fortune will record neural activity via electrodes inserted into the fish’s brains during the movement experiments—a technique unavailable in prior work. This will let the team compare brain signals with behavior in real time, and look for an underlying mechanism that drives the switch from “explore” to “exploit.”

A scientific ‘dream team’

This project’s power lies in its teamwork. Hoffman coordinates from UMBC, analyzing data from all the collaborators. Cowan oversees behavioral tests on fish without brain probes, which allows for more complex experimental setups. Fortune at NJIT is handling the neural recordings, while Lamperski at Minnesota focuses on machine learning models that reflect what the others are seeing in the lab.

“What I love about this project is that all the components are necessary to elucidate the mechanism,” Hoffman reflects. “Nobody could do this completely on their own.” 

“I’m excited to have this dream team of mathematicians, engineers, and neuroscientists to assemble behind this problem,” Cowan said. “My lab at Hopkins has struggled to make sense of these movements for over a decade. This new team puts us on a path to finally decode the neural mechanisms animals use to switch gears between gathering task information, on the one hand, and getting the task done, on the other.”

portrait of man sitting at desk in front of computer monitor, which has images of fish on it
Noah Cowan at Johns Hopkins University is the overall lead for the new project. (Courtesy of Cowan)

‘My favorite kind of science’

This research could eventually transform robotics.

“If you want to build a robot that is going to mimic the motion of animals that exhibit this explore/exploit pattern for incorporating sensory information, you have to know how the animals do it,” Hoffman says. “This grant is focused on figuring out what that mechanism is.”

A robot that mimics natural intermittent sensing might navigate uncertain spaces, like disaster zones, more efficiently than constant-scanning models. The shared explore-exploit pattern also suggests broader relevance for the research, potentially informing understanding of neurological disorders—though Hoffman stresses those possibilities are further down the road. 

The grant will also open doors for students: Hoffman plans to involve undergraduates in data visualization and analysis, offering hands-on experience in interdisciplinary research that demonstrates how together, diverse minds can unlock secrets of the brain—with ripple effects in tech and health.

“The one thing I’m really excited about in this grant is that it’s completely multidisciplinary,” Hoffman says. “Everybody has a different perspective that helps us understand what’s going on. This is my favorite kind of science.”

Retrievers rising: Welcoming the largest-ever incoming class

As the fall 2025 semester takes off at UMBC, the campus hums with the energy of our largest-ever incoming class, reflecting a Retriever spirit that draws talent from near and far. With total undergraduate enrollment rising 2.6 percent, this fall UMBC welcomed 2,280 first-time, first-year students and over 870 new transfer students. In addition, an increased first-year retention rate shows UMBC’s supportive environment helps students thrive and stay the course toward their goals.

“We are thrilled to welcome another record-breaking first-year class,” shares Yvette Mozie-Ross ’88, vice provost for enrollment management and planning. “What excites us most is this year’s geographically diverse student body, with more international, out-of-state, and Baltimore City undergraduates, fostering a vibrant campus community.”

Diving into community

Welcome, Retrievers kicked off on August 23 with the excitement of move-in day, where family, friends, faculty, and staff helped Retrievers settle into their home away from home. As new arrivals hauled storage bins, they bonded with roommates and volunteers through laughter and shared anticipation. Commuting students connected with each other at Commuter Welcome Day. 

Among the many activities that set the stage for the year ahead, Involvement Fest drew hundreds of students. Filling the Retriever Activities Center, more than 200 student organizations invited students to join academic clubs, sports, Greek life, service groups, and more. These activities give all students the chance to explore their interests and find new ones while developing lasting friendships. 

“I’m looking forward to meeting new people and also spending time with my friends,” shared Annamarie Walther, a senior financial economics major, at Involvement Fest. As the communications lead for the Catholic Retrievers, “I’m excited to serve,” she added. 

An institution where you belong

A few days earlier at UMBC’s Fall Opening Meeting, first-year student Andrew Whipple shared that attending college was never a given for him. “Being here at UMBC is about more than just academics,” Whipple, a visual arts major and a Linehan Artist Scholar, shared. “It’s about breaking barriers and creating a future for myself that I can be proud of.”

Archana Thakkar, an incoming transfer student pursuing a degree in business technology administration, also shared hopes held by many students. “I am excited to join UMBC and become part of a community that thrives on collaboration and innovation. I look forward to building connections with professors and classmates, engaging in student organizations, and taking part in opportunities that encourage both personal and academic growth,” Thakkar says. “More than anything, I am eager to contribute to the vibrant spirit of UMBC while learning from the diverse perspectives that make this university so special.” 

At Convocation, UMBC President Valerie Sheares Ashby officially ushered in the start of a new school year. She shared an uplifting message with students, faculty, and staff, promising all would be supported as they pursued their potential. “I want you to know that you have come to an institution that wants you here and that is sure that you belong and that you can be successful,” she said, “even if you are not so sure yourself yet.” 

After Convocation, attendees spilled out of the Chesapeake Employers Insurance Arena and toward a lively cookout on the Quad. As conversation and lemonade flowed, strangers began to turn into friends, setting the tone for a year of achievement among community.

From Nepal to NASA: A  journey of resilience and discovery 

In 2020, as the COVID-19 pandemic disrupted lives worldwide, Greema Regmi began her Ph.D. in UMBC’s atmospheric physics program. Studying remotely from her home in Nepal, she navigated a grueling schedule due to the time difference.

“One class started at 1 a.m. Nepal time, and one final went until 4:30 a.m.,” she recalls. Yet, she embraced the challenge. “I didn’t mind. I like working at night, so it worked for me. And because of COVID, I had nothing else to do. At least this way, I was making progress towards my studies.” 

Now in her fifth year, Regmi’s perseverance has earned her NASA’s prestigious Future Investigators in NASA Earth and Space Science and Technology (FINESST) fellowship, which will provide up to $50,000 annually for up to three years to fuel her research on atmospheric dust.

Regmi’s passion for atmospheric physics took root in Nepal. For an undergraduate project, she analyzed meteorological factors surrounding a tragic local plane crash. “Nepal has a lot of hills and mountains, so it channels wind in certain directions,” she explains. “Based on my analysis, unexpected turbulence could have been a factor in the crash.”

As a senior at Tribhuvan University in Kathmandu, Nepal, Regmi traveled to the U.S. for the first time, to present at the American Geophysical Union Annual Meeting. The event was a turning point in her scientific trajectory. 

“I really liked sharing my work in front of a huge crowd. Everybody was listening, and that boosted my confidence,” she says. In Nepal, it sometimes felt like research was a lower priority, but the U.S. offered a fresh stage for her work, Regmi says: “The AGU meeting was great—people appreciated my work. That was a huge motivation to continue and do grad school.”

visualization of a world map, with tan, orange, and ran bands swirling near the equator. Nepal
This still image from a simulation shows dust and other aerosols moving around the globe. Greema Regmi’s research has focused on dust traveling over the Atlantic Ocean between Africa and the Caribbean, visualized here in shades of red to tan. (NASA/Goddard Space Flight Center)

Decoding dust for climate science

Regmi’s FINESST-funded research aims to improve the accuracy of climate forecasting by refining how atmospheric dust is accounted for in climate models. How dust scatters light affects how much heat is reflected back to space versus absorbed. She combines data from LiDAR and multi-angle polarimeters, such as NASA’s Research Scanning Polarimeter, to analyze dust’s role. 

“A polarimeter measures how much radiation you see from the top of the atmosphere,” integrating information from every atmospheric layer, “versus LiDAR, which gives you information on each layer of the atmosphere separately. So when you combine both of those, you have a very rich dataset,” she explains.

Regmi’s work challenges outdated assumptions. “Our existing models assume that dust has a simple shape, such as spherical, but for a long time we’ve known that it isn’t that simple,” she says. In her work, she models dust as hexahedral instead—a 3D shape with six faces. The most familiar hexahedron is a cube, but the angles can shift to make it more or less pointy. 

Regmi was surprised by how much using a spheroid versus hexahedral model for dust affects the overall climate models she is investigating. “I did not expect the shape of dust particles that tiny to have such a huge impact. And that was very exciting for me,” she says. 

Her research focuses on dust traveling across the Atlantic Ocean from the Sahara Desert. The solid, dark ocean background makes it much easier to pull out clean information about dust, avoiding uncertainty introduced by variegated background landscapes, like the shadows that form in mountain ranges or a wide range of vegetation colors. Improved climate models based on her work could inform decision-making related to climate resilience and mitigation.

specialized airplane flying with dusky skies in the background; silhouetted trees at ground level. Nepal
NASA’s ER-2 high-altitude plane carried the instruments that collected the data Regmi used in her research. (NASA)

A community that lifts you up

Regmi has been able to accomplish so much in part because of the supportive community she found at UMBC, after finally arriving on campus in fall 2021. Her Ph.D. advisor, Vanderlei Martins, professor of physics and director of UMBC’s Earth and Space Institute, fosters a collaborative lab. 

“Vanderlei is a great professor, but what I really appreciate about him is the group that he has built over years. Everybody in the group is as supportive as he is,” Regmi says. “He has done so much in the field, yet he’s still so humble.”

The positive feelings are mutual. “From the very first classes it was obvious that Greema had great potential and tremendous enthusiasm to learn, to grow scientifically, and to work with others,” Martins says.

Regmi is co-advised by Reed Espinosa, Ph.D. ’17, atmospheric physics, a research physical scientist at NASA Goddard Space Flight Center. “He is an outstanding mentor—patient, thorough, and always encouraging,” Regmi says. “Most of what I know about conducting research I have learned from him.” And Espinosa learned much of that from Martins, who was his own Ph.D. advisor. 

group photo of three people standing in front of a research poster mounted on a corkboard
Reed Espinosa (left) and Vanderlei Martins (right) have both mentored Greema Regmi (center) during her Ph.D. at UMBC. (Brad Ziegler/UMBC)

Pengwang Zhai, professor of physics, has been another mentor. “Regmi is a hardworking and intelligent student,” Zhai says. Despite starting her Ph.D. during the pandemic, “she embraced the difficulties, overcame steep learning curves, and has grown into a valuable member of the atmospheric physics program.”

Martins highlights her cohort’s strength. “Regmi has joined an enthusiastic group of Ph.D. students in the atmospheric physics program at UMBC, who have clearly shown that together we are better, and can go farther,” he says. 

Regmi values the camaraderie. “In Vanderlei’s group, people help you in every way they can,” she says. Her office near the elevator sparks connections. “Every time someone comes up, they will stop to say ‘hi.’ I’ve made a lot of friends and learned so much from them,” she shares. “I like my department a lot.”

Bridging two worlds

Regmi’s journey bridges her unique perspectives as a student in Nepal and the U.S. “You learn different things when you work back home in a developing country. And when you come here to a developed country, it’s a very different perspective,” she reflects. “In Nepal, it’s more about, ‘These are the resources we have, so how can we make the most out of them?’” she says. At UMBC, she’s embraced broader opportunities. “I think here you can push the limit. I don’t even know what the limit is in the U.S. Here you can dream more and be more experimental,” she observes.

Regmi is inspired by her father, also an atmospheric physicist, but she has forged her own path. This spring, she returned to Nepal for only the second time since starting her Ph.D. to conduct research with him. “I finally got to work with him professionally, which was great,” she says. 

Grounded in the UMBC physics department’s community of support, Regmi’s confidence has only grown since her arrival in Maryland. “There’s always a place for my opinion, which is very nice. Because of that, and all of the experiences I’ve had, now I have the confidence to start my own project,” she explains. “And that’s why I think now I’m confident to go back home, lead something there, and be helpful in some small way.”

Learn more about atmospheric physics research at UMBC.

From coursework to career: UMBC interns shine at AstraZeneca

In the heart of the BioHealth Capital Region—spanning Maryland, Virginia, and D.C.—more than 2,300 life science companies, 78 federal laboratories, and 35 million square feet of laboratory space create a vibrant hub for biotechnology and pharmaceutical innovation. For UMBC students interning at AstraZeneca, a global leader in healthcare, this summer offered a chance to bridge classroom learning with real-world challenges. Through their work, Mustafa Akpinar, Alek Read, and Ty Allen honed technical expertise, built teamwork and communication skills, and forged connections with peers and professionals on the Baltimore/D.C. biotech scene.

Building technical mastery

At AstraZeneca, UMBC interns are diving into hands-on projects that align with their academic training and career ambitions. Akpinar, a senior information systems major, works as a cyber threat intelligence and threat detection intern, analyzing potential cyber threats and sharpening detection systems using tools like Splunk

“This internship is a perfect fit for both my academic path and long-term career goals,” Akpinar says, noting how the role builds on his data communications and networks and database design courses. “Long term, I want to work in cloud security or threat detection,” he adds, “and this internship gives me practical exposure to both.” 

Alek Read, a senior environmental science major, contributes to sustainability efforts at AstraZeneca’s Frederick Manufacturing Center as an environmental health safety intern. His projects include measuring biochemical oxygen demand in wastewater and ensuring environmental compliance, directly tying into his passion for sustainable innovation. 

“This experience has helped me explore how large companies manage their environmental footprint,” Read explains. “It has been exciting to see how environmental practices are applied in real-world production settings.” He’s also learned about the environmental permitting process, he says.

Allen, a junior mechanical engineering major, is a site operations intern at AstraZeneca. He applies his engineering skills to edit technical drawings in AutoCAD. The role offers him a practical glimpse into the day-to-day life of an engineer, Allen says, allowing him to apply classroom knowledge in a professional setting. “It’s a great way to experience what being an engineer is like outside of school,” he shares.

Communicating for team success

Beyond technical skills, the interns are developing essential relational skills like collaboration and communication. Akpinar highlights the collaborative nature of his work, saying, “One major takeaway is how critical collaboration is in cyber defense—threat intelligence isn’t done in a vacuum.” His ability to share ideas with mentors and teammates has grown, and his suggestions are taken seriously and encouraged by his team, Akpinar says.

Read collaborates regularly with teammates across departments, giving him ample opportunities to practice clear communication. Plus, his teammates trust him to set task deadlines independently, boosting his project management skills. Similarly, Allen values the confidence his team has in him, explaining that as long as he checks in regularly, he can manage his work as he sees fit. Developing the ability to manage one’s workload independently and coordinate with colleagues across an organization are valuable skills that will serve these interns well in any future career.

two men stand on either side of a banner that reads "WELCOME Alumni and Friends" with the UMBC logo, in a meeting room at AstraZeneca.
Alek Read, left, enjoyed the alumni and intern mixer at AstraZeneca, where he met Zulqifar Shah, M.P.S. ’13, engineering management. (Courtesy of Miriam Friedman)

A launchpad for future careers

The internship experience extends beyond individual tasks, offering opportunities to connect with fellow interns and industry professionals. Akpinar has enjoyed bonding with other UMBC interns across diverse roles at AstraZeneca. “It’s been great having that shared experience—we support each other and exchange insights from our different teams,” he says.

Read especially appreciated an AstraZeneca UMBC alumni and intern mixer, where he networked with former UMBC students now thriving at the company. These interactions not only broaden the interns’ perspectives on the kinds of careers available in the region, but also help them build lasting professional connections that could serve them in the future. Touring manufacturing facilities and participating in inspections was another highlight for Read. 

For Akpinar, Read, and Allen, interning at AstraZeneca is more than a summer job—it’s a stepping stone to their future careers. From protecting digital assets to advancing sustainability and engineering innovation, their work has the potential for real-world impact well beyond the BioHealth Capital Region. As they grow in their roles, these UMBC students are building skills, forging connections, and laying the foundation for success in the booming biotech industry.

A web of mentorship: Weaving support and arachnid research at UMBC

A web of mentorship, as intricate as the arachnids Mercedes Burns studies, stretches from her UMBC lab to University of North Carolina at Charlotte and University of Nevada, Las Vegas.

At the web’s center is Burns, a passionate arachnologist whose guidance heavily influenced Sarah Stellwagen, a former postdoctoral fellow in Burns’ lab and now a faculty member at UNC Charlotte. Burns and Stellwagen both mentored Tyler Brown, Ph.D. ’24, biological sciences, at UMBC, and today Brown is a National Science Foundation postdoctoral fellow with Stellwagen in North Carolina. The web extends to Emily Marinko ’23, biological sciences, who coauthored research with Brown and Burns and today is pursuing graduate work in Nevada. 

Like spider silk, this network is strong, flexible, and enduring—fostering a love for science and a supportive environment that extends beyond the lab and into the community. All four of these researchers share a commitment to spreading their love for the often-maligned arachnids they study with broad audiences as a means of dispelling myths, reducing fear, and promoting the value of diversity.

two researchers in lab coats; one sits at a lab bench using a pipet, the other observes
Tyler Brown (left) earned his Ph.D. in 2024, mentored by Mercedes Burns (right). (Marlayna Demond ’11/UMBC)

Guiding the next generation

Burns’ mentorship style is “a very one-on-one approach,” Stellwagen says. “She has an open door and wants to talk about details and help you think through your experiments and your projects. That was a very successful way to mentor me, and I’m trying to mentor students in that way, too.” 

Burns meets students where they are, helping them pursue their interests within her research program’s framework. Burns focuses on the evolutionary ecology of Opiliones, commonly known as daddy longlegs, while Stellwagen explores the material properties of arachnid silks and glues.

“I appreciated Mercedes’ willingness to open up her lab to my interests, so we could push our expertise together, which has made me a lot more successful down the line,” Stellwagen says. “I took that openness to heart. Today, I’m a silk lab, a biomaterials lab—but for people who have different interests, as long as you can incorporate some bit of silks and glues into your research, I’m very open.” 

That attitude extends to Brown, who is more interested in behavioral research. In Burns’ lab, he led a study of Opiliones mating behaviors using a novel video-tracking method driven by machine learning. Marinko conducted many of the trials, and both are co-authors with Burns on the resulting paper. Now in Stellwagen’s lab, Brown is continuing to pursue behavioral work with a silk-and-glue twist.

researcher stands in front of a research poster in a ballroom poster hall. Title of the poster reads, "Behavioral tracking reveals sexual conflict is elevated in Opiliones species with reduced nuptial gifts"
Emily Marinko (above) conducted research with Mercedes Burns as an undergraduate. Here they present her findings at UMBC’s Undergraduate Research and Creative Achievement Day in 2022. (Sarah Hansen, M.S. ’15/UMBC)

“Connecting with them personally is something I’ve really appreciated with both Mercedes and Sarah. It makes the lab a more comfortable place to be in,” Brown says. In turn, “Being accessible on a personal and professional level to Emily was something that was important for me. I made sure that they had the level of independence they were hoping for.”

The personal, high-touch mentoring style in the Burns lab worked well for Marinko. “Dr. Burns and Tyler were very supportive, and I felt very welcomed. It helped me feel like I was able to ask questions, which I think is a really important part of learning in science,” Marinko says. “I wasn’t just a pair of hands that did busy work. I felt like I was really learning and contributing to the research, and that experience helped me get my position as a grad student.”

Sharing science, breaking down barriers

While much of their work happens in the lab, Burns’ team understands that thoughtful outreach can help the public care for—and perhaps even learn to like—arachnids.

“We’re talking about organisms that most people dislike,” Burns acknowledges, “so if we understand them and are curious about them, that’s going to take some of the fear away.”

For Brown, it started with “getting to know them on a more personal level”—the arachnids, that is. “Working with arachnids every day and learning so much more about them, it just becomes so much more interesting, and any fear you have sort of goes away, the more you understand them,” he says. He wants to help others overcome their fears, too. 

an arachnid (a tarantula) in a terrarium
Burns and her lab members use this tarantula as part of their educational outreach to shift how people think about arachnids. (Marlayna Demond ’11/UMBC)

To that end, Brown recently participated in a children’s outreach event at a local library. “A lot of people were very nervous when they saw a bucketful of tarantula molts, but even in the short time frame of the event, getting to explain things and seeing people overcome that initial fear because they’re learning a bit—that has really helped guide me toward what I want to do with outreach.”

The entire Stellwagen lab participated in an outreach event at a major youth museum in Charlotte. “I think the commitment to outreach is born from having such a strong love for these organisms,” she says. “We do this because we love them so much, and we want people to learn about them so they don’t have this stigma. In the end, it’s about, ‘How do you get this information effectively to the public so they can care about and preserve these precious things?’”

Events at libraries, schools, and museums can foster scientific literacy and humanize scientists and the scientific process, leading to a better informed and more open-minded community. 

Marinko started out with some of their own hangups around arachnids, but over time, that changed. “When Dr. Burns talked about her research, she was so passionate about it that I wanted to be more like her, I guess. I wanted to overcome my fear; I wanted to be braver,” they say. Today Marinko works with a potentially even scarier organism: ticks. “And obviously since I ended up working with ticks, I’m not as afraid of them as I used to be, either,” Marinko says.  

two people on a high lookout platform, lush mountains on either side of a river valley in the background
This summer, Mercedes Burns (left) and Harper Montgomery ’20 (right) traveled to Japan and South Korea to collect arachnid specimens and work in a collaborator’s laboratory. Montgomery is currently pursuing a Ph.D. with Burns, adding to the mentorship web. (Courtesy of Burns)

Embracing difference

Reducing fears of organisms we don’t understand can even affect how we think about and interact with people who are different from us, Burns says. “I don’t think it’s an accident that I’m interested in biodiversity, and I also care a lot about human diversity—about celebrating that experience and how people bring different ideas, passions, and interests to the table,” she says.

Burns strives to promote curiosity, a genuine desire to learn, and a willingness to change one’s mind in all of her students. “If you’re curious about something, there’s less fear and more of a motivation to understand,” she says. “By getting a broad range of students involved in research, they’ll go out and have those casual conversations with friends and family that lead overall to a more open perspective on biodiversity and, more broadly, an appreciation of diversity.”

“When you go into Mercedes’ lab, there’s an excitement about these organisms that you feel,” Stellwagen says. That passion helps attract outstanding students and keep them motivated, she adds. “Mercedes has created arachnology ‘lifers’ with her enthusiasm, and now that’s trickled down into me being able to pull in some lifers, too.”

two women, one with an arm around the other's shoulders, outdoors with green trees and a brick building in the background
Sarah Stellwagen (left) and Mercedes Burns (right) developed a close personal relationship when Stellwagen was a postdoc with Burns; Burns even fills the role of adoptive “auntie” to Stellwagen’s children. Today they are continuing their highly productive research collaboration, with Stellwagen now a faculty member at UNC Charlotte. (Marlayna Demond ’11/UMBC)

Teamwork fuels discovery

The culture of supportive mentorship in Burns’ lab extends beyond work in the lab to the group members’ collaborative approach to applying for grants to fund their ongoing research. Together, Burns, Stellwagen, and Brown refined a strategy—ranking reviewer concerns and proposing solutions—that won funding after initial rejections. 

“We collaboratively came up with techniques to go through the grant application process, and that has helped us all a lot,” Burns notes. Having each other for support also kept the group’s morale up, even when they received harsh feedback from reviewers. 

Brown was involved in some of those applications, which he says “definitely helped me make mine into a successful application in my second year in Sarah’s lab.”

Burns collaborated with Stellwagen on a major grant when Stellwagen was still a postdoc in her lab, which is not necessarily typical. “I feel like a collaborative approach to grant-writing has been more my style,” Burns reflects. “If we want rich collaborative experiences, we need to enable our colleagues to be co-PIs and apply with us.”

The mentorship web spun by Burns, Stellwagen, Brown, and Marinko at UMBC illustrates a dynamic cycle of learning, collaboration, and outreach. Their shared passion for arachnids not only drives innovative research but also fosters a supportive environment where students can grow into confident scientists. 

This network, built on personal connections and open inquiry, extends its impact through public engagement, encouraging broader appreciation for biodiversity. By fostering curiosity and embracing diverse perspectives, the lab’s legacy weaves an ever-expanding web, inspiring new generations to advance science and understanding—and maybe even grow an appreciation for arachnids along the way.

UMBC mathematician honored with invitation to Stephen Smale’s 95th birthday conference

Matthew Kvalheim, assistant professor of mathematics, was one of only about 20 scholars who spoke at a conference celebrating the 95th birthday of Stephen Smale, one of the most influential mathematicians alive today. Held July 21 – 22, 2025, at the Simons Institute for the Theory of Computing in Berkeley, California, the invitation to present was an honor for Kvalheim, who joined the UMBC faculty in 2023.

Stephen Smale, a Fields Medalist (an award often likened to a Nobel Prize in mathematics), revolutionized fields like topology and dynamical systems. His groundbreaking work, which Kvalheim uses as a basis for his own research, has shaped modern mathematics. 

Kvalheim’s research explores systems that evolve over time. Specifically, he studies “asymptotically stable” systems—those that naturally settle into a predictable state, like a pendulum coming to rest. Kvalheim’s talk at the conference built on Smale’s foundational discoveries, using them to determine whether certain system behaviors are possible or fundamentally unattainable. 

portrait of Matthew Kvalheim, whose work builds off of Stephen Smale's, in front of long hallway with tall windows on one side
Matthew Kvalheim (courtesy of Kvalheim)

“It was a great privilege to speak about Professor Smale’s legacy, and in particular the deep impact his work has had on one of my projects funded by the Air Force Office of Scientific Research,” Kvalheim says. “The result of this project, which relies heavily on Smale’s breakthrough solution of a mathematical puzzle known as the ‘generalized Poincaré conjecture,’ helps us understand limitations in designing stable real-world systems.”

This work has far-reaching implications, from ensuring the safety of autonomous vehicles to optimizing complex robotics. By developing mathematical tools that apply across diverse applications, Kvalheim’s research offers universal insights into what systems can and cannot do, blending creativity with mathematical rigor to tackle fundamental questions with real-world impact. 

Learn more about UMBC’s programs in mathematics and statistics

UMBC and Building STEPs partner to help Baltimore City high school students reach their potential in STEM

Boing! Bouncy balls strike the hallway floor as small groups of students measure bounce heights with a meterstick and record data. They repeat the test in a carpeted classroom, then analyze results in Excel, discussing how surfaces affect energy conversion.  

This might sound like a physics laboratory, but it’s actually a math course for high schoolers in Building Science Technology Education Partnerships (STEPs), a college-preparatory program for students from under-resourced high schools in Baltimore City. For two weeks this summer, 21 rising seniors and college-bound students, nine college-student tutors, and instructor Rebecca Kirvan, M.A. ’13, secondary education and teaching, filled the fourth floor of UMBC’s Interdisciplinary Life Sciences Building for intensive, hands-on math instruction each afternoon. In the mornings, the students participated in professional development programming, such as a financial literacy workshop and team-based problem-solving challenges.

This is the fifth year of collaboration between Building STEPS and UMBC, but thanks to a deepening relationship between the organization and the College of Natural and Mathematical Sciences (CNMS), this year the summer program came to UMBC’s campus for the first time. In addition, the math portion shifted from traditional tutoring to an adapted version of MATH 110: Math in Action, a unique laboratory-style math course heading into its third year being taught at UMBC. 

Building STEPs student sitting at a table in front of a laptop, college student leaning over and talking with him; large window looking out on trees and the UMBC library in the background
UMBC tutor Xavier Cohen (left), a rising senior majoring in math and computer science, has been tutoring math in various capacities since 2021. He says that he sees firsthand how the activity-based curriculum used by Building STEPs improves student learning. (Brad Ziegler/UMBC)

“UMBC and CNMS have been incredible collaborators, providing Building STEPs students with accessible and effective math enrichment in an immersive college experience,” says Debra Hettleman, CEO of Building STEPs.

William R. LaCourse, CNMS dean, believes strongly in making math education engaging and relevant for all students, in support of developing their critical thinking skills. “Teaching math in an interactive format shows the students how it relates to their everyday lives,” he says. “Creating opportunities for them to make those connections is so important.”   

From tutoring to hands-on labs

In 2021, Cindy Greenwood, associate director of UMBC’s Center for Women in Technology, coordinated the original tutoring initiative for her capstone project in UMBC’s certificate program in community leadership, after learning from Building STEPs that that was what they needed most. 

Alexis O’Malley ’18, mathematics and psychology, took the lead developing a robust curriculum for the tutors to implement on top of her role as a calculus instructor in CNMS. Until this year, the University of Baltimore hosted the tutoring sessions. For 2025, CNMS hired Kirvan to modify the activities in MATH 110, which O’Malley also originally led with support from math department faculty.

“As a former high school teacher, I’ve enjoyed the opportunity to adapt college labs for a high school audience,” Kirvan says. “It’s great to work with this group of students and help them beef up their math skills and get ready for college.”

woman leans over a chair and points at a laptop screen, while a student sits in front of the laptop
UMBC alumna Rebecca Kirvan, right, taught the lab-based math course this summer. (Brad Ziegler/UMBC)

The students see the benefits.

“It’s been good to review concepts and practice my math skills,” shared Benjamin Kima, a participant from Mergenthaler Vocational-Technical High School. Sam Boad, also at Mergenthaler, said, “I’m glad they’re giving us a chance to see the content ahead of the school year.” Zaiqah Pinkney, from City Neighbors High School, added, “I like hands-on activities. It helps me learn better.”

“Students consistently rate math as their favorite part of the day,” shares Sheyna Mikeal, chief program officer at Building STEPs. “It challenges them, but the small-group structure, guided by dedicated tutors, builds confidence and encourages real growth.”

Campus immersion and career prep

Beyond providing math instruction, CNMS funded lunches at UMBC’s True Grit’s dining hall, freeing up Building STEPs’ budget for student transportation and enabling greater participation.

“I’ve enjoyed the opportunity to be on a college campus,” shared Brandon Thomas, a student at Mergenthaler.

And beyond the summer program, a larger cohort of Building STEPs students visited UMBC during the semester. They heard presentations from CNMS departments and took a tour of campus. “We’ve witnessed the power of learning on a college campus shifting the students’ perspective,” Mikeal says. “It reinforces that college is not just a goal, it’s an environment where they belong.”

Other Building STEPs activities include visits to companies like Northrop Grumman and Beckton-Dickinson, workshops on searching for and applying to colleges, and one-on-one feedback with volunteer writing advisors.

standing student drops a ball down a wall, alongside a meterstick. Another student uses her phone to record its fall.
Benjamin Kima (standing) runs a trial in a lab activity about potential and kinetic energy. (Brad Ziegler/UMBC)

Strength beyond academics

Students in the program, founded in 2000, are recommended by college counselors and teachers, and must maintain a 3.0 GPA. This past academic year, there were 83 juniors and 83 seniors enrolled, and there are 175 Building STEPs alumni. Nearly 80 percent earn a college degree, and nearly two-thirds earn degrees in STEM. Coming from 15 of Baltimore’s most challenged high schools, 87 percent are first-generation college graduates. Alumni return from college to offer programming to current participants, fostering leadership development.

“Together with UMBC, we’re not only strengthening academic skills—we’re also expanding access to opportunity,” Mikeal says.

LaCourse sees providing space, funds, and effective and engaging math activities to benefit local high schoolers as a natural fit for the college.

“Building STEPs participants are bright, motivated students who just need a little support to reach their potential,” LaCourse says. “It’s a privilege to be able to offer the resources the program needs—from classrooms to curriculum—to enable an enriching summer math and professional development experience. We hope to see some of their faces on campus again soon—this time as UMBC students.”

seated student smiling and laughing, three other students in a group around him facing away from the camera
Building STEPs participant Brandon Thomas relaxes with his group members between experiments. (Brad Ziegler/UMBC)

Leaf year: PACE satellite data reveals global plant health

A new study using data collected by NASA’s Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) satellite established a novel method to determine how productive plants are worldwide. The new remote sensing technique could help us better understand plants’ role in capturing carbon on a global scale and reveal how plants are responding to factors like changing water availability and temperature, with relevance for conservation, agriculture, and more. 

The research, led by Karl F. Huemmrich, a UMBC research scientist with the Goddard Earth Sciences Technology and Research (GESTAR) Center II, shows that PACE’s advanced camera can track plant health by analyzing the light leaves reflect. By comparing these satellite observations with measurements taken on the ground, the study confirmed that the new method works across diverse landscapes, opening the door to improved global ecosystem monitoring.

Launched in February 2024, PACE’s Ocean Color Instrument (OCI) captures daily images of Earth that show how plants are responding to their environment in real time. While OCI’s primary mission is to study oceans (hence its name), it also collects data over land.  

“Although they do not appear to be very active to us, plants are constantly making physiological adjustments to their environment, responding to factors such as changing light, temperature, humidity, water, and nutrient availability,” Huemmrich explains. A plant can change its leaf area, leaf orientation, and the prevalence of different leaf pigments, he says. All of those changes alter the intensity and wavelengths of light the plants reflect, which OCI detects. 

“PACE provides almost daily repeat observations,” except for areas blocked by clouds, Huemmrich says. “This time series can be used to describe changes in vegetation productivity related to seasonal change, for example the timing of spring green-up and autumn senescence, or more transient effects, like droughts or cold snaps.”

a gif of North America showing changing reflectance patterns detected by PACE's OCI from March through November; starts out black and dark blue then spreads to more area and turns to green and then white for most productive areas
This gif shows how PACE’s OCI “sees” plant productivity changing throughout the growing season across North America. (Skye Caplan)

One algorithm to track them all

Unlike older satellite methods, such as MODIS Gross Primary Productivity, which needed weather data like temperature and humidity to estimate plant growth, PACE relies solely on the light reflected by plants. 

“By using the information from the spectral reflectance alone, we are letting the plants show us their responses to environmental conditions, rather than trying to predict their responses,” Huemmrich explains. This approach makes it easier to accurately capture short-term changes.

The study tested PACE’s data against ground measurements from National Ecological Observatory Network (NEON) sites across the U.S., covering everything from arctic tundra to tropical dry forests. 

“The NEON sites were chosen to cover all of the major ecoclimate types within the U.S.,” Huemmrich notes, “and frankly, it was surprising that a single algorithm could do as well as it did across all of those very different vegetation types.” This success suggests the method can be used globally, and there are plans to include more sites worldwide in future studies to cover even more ecosystems.

close-up portrait of man, weather station and grassy field in the background
Huemmrich stands 100 feet above the ground on a meteorology tower at the Smithsonian Environmental Research Center in Edgewater, Maryland. (Courtesy of Huemmrich)

“An entirely new view”

This research could transform how scientists track carbon sequestration—how plants absorb and store carbon dioxide, a key greenhouse gas—improving understanding of how different ecosystems influence climate change. The ability to spot stress events early could also help farmers and environmental managers act quickly to improve outcomes for crops and wildlife.

PACE’s global reach is a huge step forward. “I believe this new ability to describe global ecosystem dynamics opens up an entirely new view of the Earth’s ecological functioning that we really have not been able to see before,” Huemmrich says. Unlike earlier methods that relied on labor-intensive ground measurements or expensive airplane flights, PACE offers a cost-effective way to monitor ecosystems worldwide.

Moving into PACE’s second year, Huemmrich is excited to explore how plant responses change over time. “I’m interested in looking at year-to-year differences,” he says. “I want to see how best to use the spectral information for early detection of stress events. Can we learn to diagnose types of stress responses? Do these responses vary among different types of plants?” 

These questions will drive future research, aiming to improve how we detect and understand plant stress across diverse ecosystems. PACE’s frequent, detailed satellite data will help scientists, policymakers, and conservationists protect ecosystems and understand how plants are responding to a changing world.

The findings were published in IEEE Transactions on Geoscience and Remote Sensing and co-authored by Petya Campbell, a UMBC research scientist with GESTAR II and senior author; Skye Caplan, Goddard Space Flight Center; and John Gamon, University of Nebraska–Lincoln.

UMBC publishes first-of-its-kind tutorial for teaching complex computational chemistry technique 

Joseph Bennett, assistant professor of chemistry and biochemistry, and Mona Layegh, Ph.D. ’25, chemistry, know how hard it can be to teach density functional theory (DFT) to undergraduates. DFT is a computational method for predicting a substances’ properties at the quantum level, such as how they conduct electricity or react with other compounds. Despite its complexity, DFT is a foundational technique that underpins research in fields like renewable energy, pharmaceuticals, and nanotechnology, so it’s critical that students understand it and know how to apply it.

To address the challenge of teaching DFT well, Bennett and Layegh coauthored a tutorial on teaching the technique, which was published in the Journal of Chemical Education. Their paper was the first ever published in the journal’s brand new Tutorial section, which was inspired by their submission and a need to develop more training tools. 

The tutorial, refined over five years of training UMBC students in DFT, is paired with open-source resources on GitHub, including ready-to-use files and visualizations. These allow instructors at community colleges or in areas with limited internet to teach the concepts even without advanced computers.

“If you can erase some of the hurdles to make DFT a little bit more accessible, more students can get into it,” Bennett says.

In sharing these teaching tools, UMBC is leveling the playing field, making it possible for students in all kinds of learning environments to master this core technique. As a result, they’ll be better prepared for careers in growing industries like technology and healthcare, where they may go on to design better batteries, solar panels, life-saving drugs, and more.