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European Researchers' Night 2022
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By European Space Agency
The European Space Agency (ESA) has selected Airbus to design and build the landing platform for the ExoMars Rosalind Franklin rover. In 2028, ESA will launch this ambitious exploration mission to search for past and present signs of life on Mars.
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By NASA
Earth (ESD) Earth Explore Explore Earth Science Climate Change Air Quality Science in Action Multimedia Image Collections Videos Data For Researchers About Us 8 Min Read NASA Researchers Study Coastal Wetlands, Champions of Carbon Capture
Florida’s coastal wetlands are a complex patchwork of ecosystem — consisting of sawgrass marshland, hardwood hammocks, freshwater swamps, and mangrove forests. Credits:
NASA/ Nathan Marder Across the street from the Flamingo Visitor’s Center at the foot of Florida’s Everglades National Park, there was once a thriving mangrove population — part of the largest stand of mangroves in the Western Hemisphere. Now, the skeletal remains of the trees form one of the Everglades’ largest ghost forests.
When Hurricane Irma made landfall in September 2017 as a category 4 storm, violent winds battered the shore and a storm surge swept across the coast, decimating large swaths of mangrove forest. Seven years later, most of the mangroves here haven’t seen any new growth. “At this point, I doubt they’ll recover,” said David Lagomasino, a professor of coastal studies at East Carolina University.
Lagomasino was in the Everglades conducting fieldwork as part of NASA’s BlueFlux Campaign, a three-year project that aims to study how sub-tropical wetlands influence atmospheric levels of carbon dioxide (CO2) and methane. Both gases absorb solar radiation and have a warming effect on Earth’s atmosphere.
A mangrove “ghost forest” near Florida’s southernmost coast houses the remains of a once-thriving mangrove stand. NASA/Nathan Marder The campaign is led by Ben Poulter, a researcher at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, who studies the way human activity and climate change affect the carbon cycle. As wetland vegetation responds to increasing temperatures, rising sea levels, and severe weather, Poulter’s team is trying to determine how much carbon dioxide wetland vegetation removes from the atmosphere and how much methane it produces. Ultimately this research will help scientists develop models to estimate and monitor greenhouse gas concentrations in coastal areas around the globe.
Although coastal wetlands account for less than 2% of the planet’s land-surface area, they remove a significant amount of carbon dioxide from the atmosphere. Florida’s coastal wetlands alone remove an estimated 31.8 million metric tons each year. A commercial aircraft would have to circle the globe more than 26,000 times to produce the same amount of carbon dioxide. Coastal wetlands also store carbon in marine sediments, keeping it underground — and out of the atmosphere — for thousands of years. This carbon storage capacity of oceans and wetlands is so robust that it has its own name: blue carbon.
“We’re worried about losing that stored carbon,” Poulter said. “But blue carbon also offers tremendous opportunities for climate mitigation if conservation and restoration are properly supported by science.”
The one-meter core samples collected by Lagomasino will be used to identify historic rates of blue carbon development in mangrove forests and to evaluate how rates of carbon storage respond to specific environmental pressures, like sea level rise or the increasing frequency of tropical cyclones.
Early findings from space-based flux data confirm that, in addition to acting as a sink of carbon dioxide, tropical wetlands are a significant source of methane — a greenhouse gas that traps heat roughly 80 times more efficiently than carbon dioxide. In fact, researchers estimate that Florida’s entire wetland expanse produces enough methane to offset the benefits of wetland carbon removal by about 5%.
Everglades peat contains history of captured carbon
During his most recent fieldwork deployment, Lagomasino used a small skiff to taxi from one research site to the next; many parts of the Everglades are virtually unreachable on foot. At each site, he opened a broad, black case and removed a metallic peat auger, which resembles a giant letter opener. The instrument is designed to extract core samples from soft soils. Everglades peat — which is composed almost entirely of the carbon-rich, partially decomposed roots, stems, and leaves of mangroves — offers a perfect study subject.
Lagomasino plunged the auger into the soil, using his body weight to push the instrument into the ground. Once the sample was secured, he freed the tool from the Earth, presenting a half-cylinder of soil. Each sample was sealed and shipped back to the lab — where they are sliced horizontally into flat discs and analyzed for their age and carbon content.
East Carolina University professor of coastal studies David Lagomasino (right) and his doctoral student Daystar Babanawo explore the Everglades by boat. The plant life here consists almost entirely of mangroves, which can withstand the saltwater tides that characterize coastal wetlands. Scientific studies of Florida’s coastal ecosystems have historically been limited by the relative inaccessibility of the region. NASA/Nathan Marder Everglades peat forms quickly. In Florida’s mangrove forests, around 2 to 10 millimeters of soil are added to the forest floor each year, building up over time like sand filling an hourglass. Much like an ice core, sediment cores offer a window into Earth’s past. The deeper the core, the further into the past one can see. By looking closely at the contents of the soil, researchers can uncover information about the climate conditions from the time the soil formed.
In some parts of the Everglades, soil deposits can reach depths of up to 3 meters (10 feet), where one meter might represent close to 100 years of peat accumulation, Lagomasino said. Deep in the Amazon rainforest, by comparison, a similarly sized, one-meter deposit could take more than 1,000 years to develop. This is important in the context of restoration efforts: in coastal wetlands, peat losses can be restored up to 10 times faster than they might be in other forest types.
Lagomasino holds a sample of peat soil collected from the forest floor. The source of the soil’s elevated carbon content — evident from its coarse, fibrous texture — is primarily the thread-like root hairs routinely recycled by the surrounding mangroves. The presence of water slows the decomposition of this organic material, which is why wetlands can lock carbon away and prevent it from escaping into the atmosphere for thousands of years. NASA/Nathan Marder “There are also significant differences in fluxes between healthy mangroves and degraded ones,” said Lola Fatoyinbo, a research scientist in the Biospheric Sciences Laboratory at NASA’s Goddard Space Flight Center. In areas where mangrove forests are suffering, for example, after a major hurricane, “you end up with more greenhouse gases in the atmosphere,” she said. As wetland ecology responds to intensifying natural and human pressures, the data product will help researchers precisely monitor the impact of ecological changes on global carbon dioxide and methane levels.
Wetland methane: A naturally occurring but potent greenhouse gas
Methane is naturally produced by microbes that live in wetland soils. But as wetland conditions change, the growth rate of methane-producing microbes can spike, releasing the gas into the atmosphere at prodigious rates.
Since methane is a significantly more potent greenhouse gas than carbon dioxide, possessing a warming potential 84 times greater over a 25-year period, methane emissions undermine some of the beneficial services that blue carbon ecosystems provide as natural sinks for atmospheric carbon dioxide.
While Lagomasino studied the soil to understand long-term storage of greenhouse gases, Lola Fatoyinbo, a research scientist in NASA’s Biospheric Sciences Lab, and Peter Raymond, an ecologist at Yale University’s School of the Environment, measured the rate at which these gases are exchanged between wetland vegetation and the atmosphere. This metric is known as gaseous flux.
Lagomasino holds a sample of peat soil collected from the forest floor. The presence of water slows the decomposition of this organic material, which is why wetlands can lock carbon away and prevent it from escaping into the atmosphere for thousands of years. NASA/Nathan Marder NASA/Nathan Marder The scientists measure flux using chambers designed to adhere neatly to points where significant rates of gas exchange occur. They secure box-like chambers to above-ground roots and branches while domed chambers measure gas escaping from the forest floor. The concentration of gases trapped in each chamber is measured over time.
In general, as the health of wetland ecology declines, less carbon dioxide is removed, and more methane is released. But the exact nature of the relationship between wetland health and gaseous flux is not well understood. What does flux look like in ghost forests, for example? And how do more subtle changes in variables like canopy coverage or species distribution influence levels of carbon dioxide sequestration or methane production?
“We’re especially interested in the methane part,” Fatoyinbo said. “It’s the least understood, and there’s a lot more of it than we previously thought.”
Based on data collected during BlueFlux fieldwork, “we’re finding that coastal wetlands remove massive amounts of carbon dioxide and produce substantial amounts of methane,” Poulter said. “But overall, these ecosystems appear to provide a net climate benefit, removing more greenhouse gases than they produce.” That could change as Florida’s wetlands respond to continued climate disturbances.
The future of South Florida’s ecology
Florida’s wetlands are roughly 5,000 years old. But in just the past century, more than half of the state’s original wetland coverage has been lost as vegetation was cleared and water was drained to accommodate the growing population. The Everglades system now contains 65% less peat and 77% less stored carbon than it did prior to drainage. The future of the ecosystem — which is not only an important reservoir for atmospheric carbon, but a source of drinking water for more than 7 million Floridians and a home to flora and fauna found nowhere else on Earth — is uncertain.
Scientists who have dedicated their careers to understanding and restoring South Florida’s ecology are hopeful. “Nature and people can coexist,” said Meenakshi Chabba, an ecologist and resilience scientist at the Everglades Foundation in Florida’s Miami-Dade County. “But we need good science and good management to reach that goal.”
The next step for NASA’s BlueFlux campaign is the development of a satellite-based data product that can help regional stakeholders evaluate in real-time how Florida’s wetlands are responding to restoration efforts designed to protect one of the state’s most precious natural resources — and all those who depend on it.
By Nathan Marder
NASA’s Goddard Space Flight Center, Greenbelt, Maryland
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Last Updated Mar 13, 2025 Editor Jenny Marder Contact Nathan Marder Related Terms
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By NASA
3 Min Read March’s Night Sky Notes: Messier Madness
Showing a large portion of M66, this Hubble photo is a composite of images obtained at visible and infrared wavelengths. The images have been combined to represent the real colors of the galaxy. Credits:
NASA, ESA and the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration; Acknowledgment: Davide De Martin and Robert Gendler by Kat Troche of the Astronomical Society of the Pacific
What Are Messier Objects?
During the 18th century, astronomer and comet hunter Charles Messier wanted to distinguish the ‘faint fuzzies’ he observed from any potential new comets. As a result, Messier cataloged 110 objects in the night sky, ranging from star clusters to galaxies to nebulae. These items are designated by the letter ‘M’ and a number. For example, the Orion Nebula is Messier 42 or M42, and the Pleiades are Messier 45 or M45. These are among the brightest ‘faint fuzzies’ we can see with modest backyard telescopes and some even with our eyes.
Stargazers can catalog these items on evenings closest to the new moon. Some even go as far as having “Messier Marathons,” setting up their telescopes and binoculars in the darkest skies available to them, from sundown to sunrise, to catch as many as possible. Here are some items to look for this season:
M44 in Cancer and M65 and 66 in Leo can be seen high in the evening sky 60 minutes after sunset. Stellarium Web Messier 44 in Cancer: The Beehive Cluster, also known as Praesepe, is an open star cluster in the heart of the Cancer constellation. Use Pollux in Gemini and Regulus in Leo as guide stars. A pair of binoculars is enough to view this and other open star clusters. If you have a telescope handy, pay a visit two of the three galaxies that form the Leo Triplet – M65 and M66. These items can be seen one hour after sunset in dark skies.
Locate M3 and M87 rising in the east after midnight. Stellarium Web Messier 3 Canes Venatici: M3 is a globular cluster of 500,000 stars. Through a telescope, this object looks like a fuzzy sparkly ball. You can resolve this cluster in an 8-inch telescope in moderate dark skies. You can find this star cluster by using the star Arcturus in the Boötes constellation as a guide.
Messier 87 in Virgo: Located just outside of Markarian’s Chain, M87 is an elliptical galaxy that can be spotted during the late evening hours. While it is not possible to view the supermassive black hole at the core of this galaxy, you can see M87 and several other Messier-labeled galaxies in the Virgo Cluster using a medium-sized telescope.
Locate M76 and M31 setting in the west, 60 minutes after sunset. Stellarium Web Plan Ahead
When gearing up for a long stargazing session, there are several things to remember, such as equipment, location, and provisions:
Do you have enough layers to be outdoors for several hours? You would be surprised how cold it can get when sitting or standing still behind a telescope! Are your batteries fully charged? If your telescope runs on power, be sure to charge everything before you leave home and pack any additional batteries for your cell phone. Most people use their mobile devices for astronomy apps, so their batteries may deplete faster. Cold weather can also impact battery life. Determine the apparent magnitude of what you are trying to see and the limiting magnitude of your night sky. You can learn more about apparent and limiting magnitudes with our Check Your Sky Quality with Orion article. When choosing a location to observe from, select an area you are familiar with and bring some friends! You can also connect with your local astronomy club to see if they are hosting any Messier Marathons. It’s always great to share the stars! You can see all 110 items and their locations with NASA’s Explore the Night Sky interactive map and the Hubble Messier Catalog, objects that have been imaged by the Hubble Space Telescope.
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By NASA
Four individuals with NASA affiliations have been named 2022 fellows by the American Association for the Advancement of Science (AAAS) in recognition of their scientifically and socially distinguished achievements in the scientific enterprise.
Election as a Fellow by the AAAS Council honors members whose efforts on behalf of the advancement of science or its applications in service to society have distinguished them among their peers and colleagues. The 2022 Fellows class includes 508 scientists, engineers, and innovators spanning 24 scientific disciplines.
Rita Sambruna from NASA’s Goddard Space Flight Center in Greenbelt, Maryland, was recognized in the AAAS Section on Astronomy, and Jennifer Wiseman, also from Goddard, was recognized in the AAAS Section on Physics. Dorothy Peteet of NASA’s Goddard Institute for Space Studies (GISS) in New York was honored in the AAAS section on Earth Science. Erik Conway of NASA’s Jet Propulsion Laboratory (JPL) in southern California was honored for distinguished contributions and public outreach to the history of science and understanding of contemporary science and science policy.
Dr. Rita Sambruna is the acting deputy director of the Science and Exploration Directorate and the deputy director of the Astrophysics Division at Goddard. She also promotes increased participation of underrepresented groups in science.Courtesy of Rita M. Sambruna Rita Sambruna
Dr. Rita Sambruna is the acting deputy director of the Science and Exploration Directorate and the deputy director of the Astrophysics Division at Goddard. She also promotes increased participation of underrepresented groups in science.
She worked with a team to position Goddard to lead the decadal top priority missions. She led a team to set into place a vision for a Multi-Messenger Astrophysics Science Support Center at Goddard, to lead the astrophysics community in reaping the most from NASA- and ground-based observations of celestial sources.
She came to Goddard in 2005 to work on multiwavelength observations of jets using the Fermi Gamma-ray Space Telescope and other NASA capabilities. From 2010 to 2020 she worked at NASA Headquarters, Washington, as a program scientist for astrophysics. Her research interests include relativistic jets, physics of compact objects, supermassive black holes in galaxies, and multiwavelength and multi-messenger astrophysics.
In December 2022, Sambruna was awarded the Honorary Fellowship of the Royal Astronomical Society (RAS) as an internationally acclaimed astrophysicist who embodies the RAS mission in promoting the advancement of science, the increased participation of historically underrepresented groups in astronomy, and a broad interest in astronomy. In 2019 she was awarded the NASA Extraordinary Achievement Medal for her leadership on the 2020 Astrophysics Decadal Survey studies. She was named Fellow of the American Physical Society in 2020 and a Fellow of the American Astronomical Society in 2021.
Dr. Jennifer Wiseman is a senior astrophysicist at Goddard and a Senior Fellow at Goddard, where she serves as the senior project scientist for the Hubble Space Telescope. Her primary responsibility is to ensure that the Hubble mission is as scientifically productive as possible.NASA Jennifer Wiseman
Dr. Jennifer Wiseman is a senior astrophysicist at Goddard and a Senior Fellow at Goddard, where she serves as the senior project scientist for the Hubble Space Telescope. Her primary responsibility is to ensure that the Hubble mission is as scientifically productive as possible. Previously, Wiseman headed Goddard’s Laboratory for Exoplanets and Stellar Astrophysics. She started her career at NASA in 2003 as the program scientist for Hubble and several other astrophysics missions at NASA Headquarters.
Wiseman’s scientific expertise is centered on the study of star-forming regions in our galaxy using a variety of tools, including radio, optical, and infrared telescopes. She has a particular interest in dense interstellar gas cloud cores, embedded protostars, and their related outflows as active ingredients of cosmic nurseries where stars and their planetary systems are born. In addition to research in astrophysics, Wiseman is also interested in science policy and public science outreach and engagement. She has served as a congressional science fellow of the American Physical Society, an elected councilor of the American Astronomical Society, and a public dialogue leader for AAAS. She enjoys giving talks on the excitement of astronomy and scientific discovery, and has appeared in many science and news venues, including The New York Times, The Washington Post, NOVA, and National Public Radio.
Dr. Dorothy M. Peteet is a senior research scientist at GISS and an adjunct professor at Columbia University. She directs the Paleoecology Division of the New Core Lab at Lamont Doherty Earth Observatory (LDEO) of Columbia.NASA Dorothy Peteet
Dr. Dorothy M. Peteet is a senior research scientist at GISS and an adjunct professor at Columbia University. She directs the Paleoecology Division of the New Core Lab at Lamont Doherty Earth Observatory (LDEO) of Columbia.
In collaboration with GISS climate modelers and LDEO geochemists, she is studying conditions of the Late Pleistocene and Holocene that are archived in sediments from lakes and wetlands. Peteet documents past changes in vegetation, derived from analyses of pollen and spores, plant and animal macrofossils, carbon, and charcoal embedded in sediments. Her research provides local and regional records of ancient vegetational and climate history. One recent focus has been the sequestration of carbon in northern peatlands and coastal marshes: ecosystems that are now vulnerable to climate change and potentially substantial releases of carbon back into the atmosphere.
Peteet also has performed climate modeling experiments to test hypotheses concerning the last glacial maximum and abrupt climate change. She is interested in climate sensitivity and in how past climate changes and ecological shifts might provide insights on future climate change.
Erik Conway has served as the historian at JPL since 2004. Prior to that, he was a contract historian at NASA’s Langley Research Center in Hampton, Virginia. He is a historian of science and technology, and has written histories of atmospheric science, supersonic transportation, aviation infrastructure, Mars exploration, and climate change denial.NASA Erik Conway
Erik Conway has served as the historian at JPL since 2004. Prior to that, he was a contract historian at NASA’s Langley Research Center in Hampton, Virginia. He is a historian of science and technology, and has written histories of atmospheric science, supersonic transportation, aviation infrastructure, Mars exploration, and climate change denial.
He is the author of nine books, most recently, “A History of Near-Earth Objects Research” (NASA, 2022), and “The Big Myth” (Bloomsbury, 2023). His book “Merchants of Doubt” with Naomi Oreskes was awarded the Helen Miles Davis and Watson Davis prize from the History of Science Society. He received a Guggenheim Fellowship in 2018 and the Athelstan Spilhaus Award from the American Geophysical Union in 2016.
AAAS noted that these honorees have gone above and beyond in their respective disciplines. They bring a broad diversity of perspectives, innovation, curiosity, and passion that will help sustain the scientific field today and into the future. Many of these individuals have broken barriers to achieve successes in their given disciplines.
AAAS is the world’s largest general scientific society and publisher of the Science family of journals.
For information about NASA and agency programs, visit: https://www.nasa.gov
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Last Updated Feb 10, 2025 EditorJamie Adkins Related Terms
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