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Ed Stone, Former Director of JPL and Voyager Project Scientist, Dies
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By NASA
5 min read
Voyager 1 Team Accomplishes Tricky Thruster Swap
A model of NASA’s Voyager spacecraft. The twin Voyagers have been flying since 1977 and are exploring the outer regions of our solar system. NASA/JPL-Caltech The spacecraft uses its thrusters to stay pointed at Earth, but after 47 years in space some of the fuel tubes have become clogged.
Engineers working on NASA’s Voyager 1 probe have successfully mitigated an issue with the spacecraft’s thrusters, which keep the distant explorer pointed at Earth so that it can receive commands, send engineering data, and provide the unique science data it is gathering.
After 47 years, a fuel tube inside the thrusters has become clogged with silicon dioxide, a byproduct that appears with age from a rubber diaphragm in the spacecraft’s fuel tank. The clogging reduces how efficiently the thrusters can generate force. After weeks of careful planning, the team switched the spacecraft to a different set of thrusters.
The thrusters are fueled by liquid hydrazine, which is turned into gases and released in tens-of-milliseconds-long puffs to gently tilt the spacecraft’s antenna toward Earth. If the clogged thruster were healthy it would need to conduct about 40 of these short pulses per day.
Both Voyager probes feature three sets, or branches, of thrusters: two sets of attitude propulsion thrusters and one set of trajectory correction maneuver thrusters. During the mission’s planetary flybys, both types of thrusters were used for different purposes. But as Voyager 1 travels on an unchanging path out of the solar system, its thruster needs are simpler, and either thruster branch can be used to point the spacecraft at Earth.
In 2002 the mission’s engineering team, based at NASA’s Jet Propulsion Laboratory in Southern California, noticed some fuel tubes in the attitude propulsion thruster branch being used for pointing were clogging, so the team switched to the second branch. When that branch showed signs of clogging in 2018, the team switched to the trajectory correction maneuver thrusters and have been using that branch since then.
Now those trajectory correction thruster tubes are even more clogged than the original branches were when the team swapped them in 2018. The clogged tubes are located inside the thrusters and direct fuel to the catalyst beds, where it is turned into gases. (These are different than the fuel tubes that send hydrazine to the thrusters.) Where the tube opening was originally only 0.01 inches (0.25 millimeters) in diameter, the clogging has reduced it to 0.0015 inches (0.035 mm), or about half the width of a human hair. As a result, the team needed to switch back to one of the attitude propulsion thruster branches.
Warming Up the Thrusters
Switching to different thrusters would have been a relatively simple operation for the mission in 1980 or even 2002. But the spacecraft’s age has introduced new challenges, primarily related to power supply and temperature. The mission has turned off all non-essential onboard systems, including some heaters, on both spacecraft to conserve their gradually shrinking electrical power supply, which is generated by decaying plutonium.
While those steps have worked to reduce power, they have also led to the spacecraft growing colder, an effect compounded by the loss of other non-essential systems that produced heat. Consequently, the attitude propulsion thruster branches have grown cold, and turning them on in that state could damage them, making the thrusters unusable.
The team determined that the best option would be to warm the thrusters before the switch by turning on what had been deemed non-essential heaters. However, as with so many challenges the Voyager team has faced, this presented a puzzle: The spacecraft’s power supply is so low that turning on non-essential heaters would require the mission to turn off something else to provide the heaters adequate electricity, and everything that’s currently operating is considered essential.
Studying the issue, they ruled out turning off one of the still-operating science instruments for a limited time because there’s a risk that the instrument would not come back online. After additional study and planning, the engineering team determined they could safely turn off one of the spacecraft’s main heaters for up to an hour, freeing up enough power to turn on the thruster heaters.
It worked. On Aug. 27, they confirmed that the needed thruster branch was back in action, helping point Voyager 1 toward Earth.
“All the decisions we will have to make going forward are going to require a lot more analysis and caution than they once did,” said Suzanne Dodd, Voyager’s project manager at the Jet Propulsion Laboratory which manages Voyager for NASA.
The spacecraft are exploring interstellar space, the region outside the bubble of particles and magnetic fields created by the Sun, where no other spacecraft are likely to visit for a long time. The mission science team is working to keep the Voyagers going for as long as possible, so they can continue to reveal what the interstellar environment is like.
News Media Contact
Calla Cofield
Jet Propulsion Laboratory, Pasadena, Calif.
626-808-2469
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Last Updated Sep 10, 2024 Related Terms
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By NASA
Linette Boisvert turned a childhood love of snow into a career as a sea ice scientist studying climate change.
Name: Linette Boisvert
Title: Assistant Lab Chief, Cryospheric Sciences Branch, and Deputy Project Scientist for the Aqua Satellite
Formal Job Classification: Sea Ice Scientist
Organization: Cryospheric Science Branch, Science Directorate (Code 615)
“When it snowed, school was cancelled so I loved winter weather, and I was fascinated how weather could impact our daily lives,” said Linette. “One of my undergraduate classes had a guest lecturer talk about the Arctic and that is when decided that I wanted to become an Arctic scientist.”Photo credit: NASA/Kyle Krabill What do you do and what is most interesting about your role here at Goddard?
As a sea ice scientist, I study interactions between the sea ice and the atmosphere. I’m interested in how the changing sea ice conditions and loss of Arctic ice are affecting the atmospheric conditions in the Artic.
Why did you become a sea ice scientist? What is your educational background?
I grew up in Maryland. When it snowed, school was cancelled so I loved winter weather, and I was fascinated how weather could impact our daily lives. One of my undergraduate classes had a guest lecturer talk about the Arctic and that is when decided that I wanted to become an Arctic scientist. This also coincided with the Arctic sea ice minimum in 2007, at the time, a record low.
In 2008, I got a B.S. in environmental science with a minor in math from the University of Maryland, Baltimore County (UMBC). I received my master’s and, in 2013, got a Ph.D. in atmospheric and oceanic sciences from the University of Maryland, College Park.
How did you come to Goddard?
My doctorate advisor worked at Goddard. In 2009, he brought me into Goddard’s lab to do my Ph.D. research. I became a post-doctorate in 2013, an assistant research scientist in 2016 (employed by UMD/ESSIC) and, in 2018, a civil servant.
Dr. Linette Boisvert is a sea ice scientist at NASA’s Goddard Space Flight Center in Greenbelt, Md. Photo credit: NASA/Jeremy Harbeck What is the most interesting field work you do as the assistant lab chief of Goddard’s Cryospheric Sciences Branch?
From 2018 to 2020, I was the deputy project scientist for NASA’s largest and longest running airborne campaign, Operation IceBridge. This involved flying aircraft with scientific instruments over both land ice and sea ice in the Arctic and Antarctic. Every spring, we would set up a base camp in a U.S. Air Force base in Greenland and fly over parts of the sea ice over Greenland and the Arctic, and in the fall we would base out of places like Punta Arenas, Chile, and Hobart, Australia, to fly over the Antarctic.
We would fly low, at 1,500 feet above the surface. It is very, very cool to see the ice firsthand. It is so pretty, so vast, and complex. We would spend 12 hours a day on a plane just surveying the ice.
Being based out of Greenland is very remote. Everything is white. Everything looks like it is closer than it is. You do not have a point of reference for any perspective. It is very quiet. There is no background ambient noise. You do not hear bugs, birds, or cars, just quiet.
Our team was about 20 people. Other people live at the base. The campaigns lasted six to eight weeks. I was there about three to four weeks each time. Many of the group had been doing these campaigns for a decade. I felt like I had joined a family. In the evenings, we would often cook dinner together and play games. On days we could not fly, we would go on adventures together like visiting a glacier or hiking. We saw musk ox, Arctic fox, Arctic hares, and seals.
How did it feel to become the deputy project scientist for the Aqua satellite, which provided most of the data you used for your doctorate and publications?
In January 2023, I became the deputy project scientist for the Aqua satellite, which launched in 2002. Aqua measures the Earth’s atmospheric temperature, humidity, and trace gases. Most of my doctorate and publications used data from Aqua to look at how the sea ice loss in the Arctic is allowing for excess heat and moisture from the ocean to move into the atmosphere resulting in a warmer and wetter Arctic.
I am honored. I feel like I have come full circle. The team welcomed me into the mission and taught me a lot of things. I am grateful to be working with such a brilliant, hardworking team.
Who is your science hero?
My father encouraged me to get a doctorate in science. My father has a doctorate in computer science and math. He works at the National Institute of Standards and Technology. I wanted to be like him when I was growing up. I came close, working at NASA, another part of the federal government. My mother, a French pastry chef, always kept me well fed.
“We would fly low, at 1,500 feet above the surface,” said Linette. “It is very, very cool to see the ice firsthand. It is so pretty, so vast, and complex. We would spend 12 hours a day on a plane just surveying the ice.”Photo credit: NASA/John Sonntag My father is very proud of me. He thinks I am more of a superstar than he was at my age, but I do not believe it. My mother is also proud and continues to keep me well fed.
Who is your Goddard mentor?
Claire Parkinson, now an emeritus, was the project scientist for Aqua since its inception. When she retired, she encouraged me to apply for the deputy position. She had confidence in me which gave me the confidence to apply for the position. She is still always available to answer any questions. I am very thankful that she has been there for me throughout my career.
What advice do you give to those you mentor?
I recently began advising young scientists; one undergraduate student, two graduate students, and one post-doctoral scientist. We meet weekly as a group and have one-on-one meetings when appropriate. They share their progress on their work. Sometimes we practice presentations they are about to give.
It is sometimes hard starting out to think that you are smart because Goddard is full of so many smart people. I tell them that they are just as capable when it comes to their research topic. I tell them that they fit in well with the Goddard community. I want to create a comfortable, respectful, and inclusive environment so that they remain in science.
What do you do for fun?
I enjoy running and paddle boarding with my dog Remi, my long-haired dachshund. I enjoy reading. I love to travel and be around friends and family. But I do not enjoy cooking, so I do not bake French pastries like my mom.
Where do you see yourself in five years?
I hope to continue doing research including field work. It would be great if some of my students finished their studies and joined my lab. I hope that I am still making people proud of me.
What is your “six-word memoir”? A six-word memoir describes something in just six words.
Hard-working. Smart. Inquisitive. Adventurous. Kind. Happy.
By Elizabeth M. Jarrell
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Conversations With Goddard is a collection of Q&A profiles highlighting the breadth and depth of NASA’s Goddard Space Flight Center’s talented and diverse workforce. The Conversations have been published twice a month on average since May 2011. Read past editions on Goddard’s “Our People” webpage.
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Last Updated Sep 10, 2024 EditorMadison OlsonContactRob Garnerrob.garner@nasa.govLocationGoddard Space Flight Center Related Terms
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By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Artist David Bowen works on “tele-present wind,” featuring grass stalks that move in response to Martian wind data previously collected by NASA’s Perseverance rover mission. Behind him sits JPL data systems architect Rishi Verma.NASA/JPL-Caltech Works in ‘Blended Worlds: Experiments in Interplanetary Imagination,’ an exhibit in Glendale, California, help shrink the universe into something tangible.
The universe is vast and filled with countless worlds, but a new exhibit at the Brand Library & Art Center in Glendale, California, aims to shrink time and space. For “Blended Worlds: Experiments in Interplanetary Imagination,” artists collaborated with scientists and engineers from NASA’s Jet Propulsion Laboratory to create cross-disciplinary works that help illuminate the universe by bringing art and science together.
On view from Sept. 21, 2024, to Jan. 4, 2025, the exhibition is part of “PST ART: Art & Science Collide,” an event presented by the Getty and involving more than 70 exhibitions from museums and institutions across Southern California exploring the intersection of art and science.
“The magic of art is that it enhances our experiences and interactions with the world — and in this case, our universe,” said Dr. Laurie Leshin, director of JPL in Southern California. “We’re honored to work with great artists to bring the wonders of space to our community through this exhibition, which invites us all to be part of a grand journey of exploration and discovery.”
The 126 grass stalks of “tele-present wind” are attached to mechanical tilting devices that move in response to Martian wind data.NASA/JPL-Caltech David Bowen’s installation “tele-present wind” features grass stalks attached to tilting mechanical devices that move in response to Martian wind data previously collected by NASA’s Perseverance rover mission. Helping make the effort possible were Rishi Verma, a data systems architect at JPL, and José Antonio Rodríguez-Manfredi, the principal investigator of the Mars Environmental Dynamics Analyzer (MEDA) system on Perseverance.
For “Seismic Percussion,” artist Moon Ribas creates an interplanetary drum score by translating seismic data from Earth, the Moon, and Mars. For Mars data, JPL’s Verma worked with Nobuaki Fuji of the Institut de Physique du Globe de Paris, who collaborated on NASA’s now-retired InSight lander. Ceri Nunn, a JPL planetary scientist, assisted with moonquake data.
Also featured is a handwritten version of U.S. Poet Laureate Ada Limón’s “In Praise of Mystery: A Poem for Europa,” the poem she dedicated to NASA’s Europa Clipper mission, which is targeting an October launch and will make multiple flybys of Jupiter’s icy moon Europa. The poem has been etched onto a metal plate on the spacecraft and will ride with the orbiter on its long journey.
Additional works allow visitors to experience Earth’s wonders through scents, use sound to convey the vast distances between our planet and those beyond our solar system, and blend heartbeats and other Earthly sounds with sonified data from Europa’s magnetic field.
“We were looking to create imaginative opportunities for people to connect with each other as they connect with the awe-inspiring science being conducted today,” said David Delgado, a cultural strategist and the project lead at JPL. “I know this experience has really opened the eyes of everyone collaborating on the project, and we hope it does the same for people who come to see ‘Blended Worlds.’”
As part of PST ART, a number of public programs and community events will also accompany the “Blended Worlds” gallery exhibition, including “Blended Worlds: An Evening of Art, Theater, and Science” hosted by Reggie Watts at the Alex Theatre in Glendale on Oct. 5, and “Earth Data: The Musical,” an original musical developed by Theater Arts at Caltech exploring the challenges of climate research and science as a human pursuit at Caltech’s Ramo Auditorium Nov. 1 to 3.
Artists’ collaborations with JPL and the display of their works at Glendale’s Brand Library were made possible by the generous support of the Glendale Arts and Culture Commission and the Glendale Library, Arts & Culture Trust.
More About JPL
A division of Caltech in Pasadena, California, JPL began in 1936 and ultimately built and helped launch America’s first satellite, Explorer 1, in 1958. By the end of that year, Congress established NASA and JPL became a part of the agency. Since then, JPL has managed such historic missions as Voyager, Galileo, Cassini, the Mars Exploration Rover program, the Perseverance Mars rover, and many more.
More About Glendale Library, Arts & Culture
Founded in 1907, the Glendale Library, Arts & Culture Department includes eight neighborhood libraries including the Brand Library & Art Center, a regional visual arts and music library and performance venue housed in the historic 1904 mansion of Glendale pioneer Leslie C. Brand, and the Central Library, a 93,000-square-foot center for individuals and groups to convene, collaborate, and create. The department also serves as the chief liaison to the Glendale Arts and Culture Commission which works to continually transform Glendale into an ever-evolving arts destination. Glendale Library Arts & Culture is supported in part through the efforts of the Glendale Library Arts & Culture Trust (GLACT). For more information visit GlendaleLAC.org, or contact Library, Arts & Culture at 818-548-2021 or via email at LibraryInfo@GlendaleCA.gov. Follow on Instagram, Facebook, and X at @MyGlendaleLAC.
For more information about PST ART: Art & Science Collide, visit: pst.art
News Media Contact
Matthew Segal / Melissa Pamer
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-8307 / 626-314-4928
matthew.j.segal@jpl.nasa.gov / melissa.pamer@jpl.nasa.gov
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Last Updated Sep 09, 2024 Related Terms
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By NASA
A prototype of a robot built to access underwater areas where Antarctic ice shelves meet land is lowered through the ice during a field test north of Alaska in March. JPL is developing the concept, called IceNode, to take melt-rate measurements that would improve the accuracy of sea level rise projections.U.S. Navy/Scott Barnes Conducted through the U.S. Navy Arctic Submarine Laboratory’s biennial Ice Camp, this field test marked IceNode’s first in a polar environment. The team hopes to one day deploy a fleet of the autonomous robots beneath Antarctic ice shelves.U.S. Navy/Scott Barnes Called IceNode, the project envisions a fleet of autonomous robots that would help determine the melt rate of ice shelves.
On a remote patch of the windy, frozen Beaufort Sea north of Alaska, engineers from NASA’s Jet Propulsion Laboratory in Southern California huddled together, peering down a narrow hole in a thick layer of sea ice. Below them, a cylindrical robot gathered test science data in the frigid ocean, connected by a tether to the tripod that had lowered it through the borehole.
This test gave engineers a chance to operate their prototype robot in the Arctic. It was also a step toward the ultimate vision for their project, called IceNode: a fleet of autonomous robots that would venture beneath Antarctic ice shelves to help scientists calculate how rapidly the frozen continent is losing ice — and how fast that melting could cause global sea levels to rise.
Warming Waters, Treacherous Terrain
If melted completely, Antarctica’s ice sheet would raise global sea levels by an estimated 200 feet (60 meters). Its fate represents one of the greatest uncertainties in projections of sea level rise. Just as warming air temperatures cause melting at the surface, ice also melts when in contact with warm ocean water circulating below. To improve computer models predicting sea level rise, scientists need more accurate melt rates, particularly beneath ice shelves — miles-long slabs of floating ice that extend from land. Although they don’t add to sea level rise directly, ice shelves crucially slow the flow of ice sheets toward the ocean.
A remote camera captured an IceNode prototype deployed below the frozen surface of Lake Superior, off Michigan’s Upper Peninsula, during a field test in 2022. The three thin legs of the robot’s “landing gear” affix the prototype to the icy ceiling.NASA/JPL-Caltech The challenge: The places where scientists want to measure melting are among Earth’s most inaccessible. Specifically, scientists want to target the underwater area known as the “grounding zone,” where floating ice shelves, ocean, and land meet — and to peer deep inside unmapped cavities where ice may be melting the fastest. The treacherous, ever-shifting landscape above is dangerous for humans, and satellites can’t see into these cavities, which are sometimes beneath a mile of ice. IceNode is designed to solve this problem.
“We’ve been pondering how to surmount these technological and logistical challenges for years, and we think we’ve found a way,” said Ian Fenty, a JPL climate scientist and IceNode’s science lead. “The goal is getting data directly at the ice-ocean melting interface, beneath the ice shelf.”
Floating Fleet
Harnessing their expertise in designing robots for space exploration, IceNode’s engineers are developing vehicles about 8 feet (2.4 meters) long and 10 inches (25 centimeters) in diameter, with three-legged “landing gear” that springs out from one end to attach the robot to the underside of the ice. The robots don’t feature any form of propulsion; instead, they would position themselves autonomously with the help of novel software that uses information from models of ocean currents.
JPL’s IceNode project is designed for one of Earth’s most inaccessible locations: underwater cavities deep beneath Antarctic ice shelves. The goal is getting melt-rate data directly at the ice-ocean interface in areas where ice may be melting the fastest. Credit: NASA/JPL-Caltech Released from a borehole or a vessel in the open ocean, the robots would ride those currents on a long journey beneath an ice shelf. Upon reaching their targets, the robots would each drop their ballast and rise to affix themselves to the bottom of the ice. Their sensors would measure how fast warm, salty ocean water is circulating up to melt the ice, and how quickly colder, fresher meltwater is sinking.
The IceNode fleet would operate for up to a year, continuously capturing data, including seasonal fluctuations. Then the robots would detach themselves from the ice, drift back to the open ocean, and transmit their data via satellite.
“These robots are a platform to bring science instruments to the hardest-to-reach locations on Earth,” said Paul Glick, a JPL robotics engineer and IceNode’s principal investigator. “It’s meant to be a safe, comparatively low-cost solution to a difficult problem.”
Arctic Field Test
While there is additional development and testing ahead for IceNode, the work so far has been promising. After previous deployments in California’s Monterey Bay and below the frozen winter surface of Lake Superior, the Beaufort Sea trip in March 2024 offered the first polar test. Air temperatures of minus 50 degrees Fahrenheit (minus 45 Celsius) challenged humans and robotic hardware alike.
The test was conducted through the U.S. Navy Arctic Submarine Laboratory’s biennial Ice Camp, a three-week operation that provides researchers a temporary base camp from which to conduct field work in the Arctic environment.
As the prototype descended about 330 feet (100 meters) into the ocean, its instruments gathered salinity, temperature, and flow data. The team also conducted tests to determine adjustments needed to take the robot off-tether in future.
“We’re happy with the progress. The hope is to continue developing prototypes, get them back up to the Arctic for future tests below the sea ice, and eventually see the full fleet deployed underneath Antarctic ice shelves,” Glick said. “This is valuable data that scientists need. Anything that gets us closer to accomplishing that goal is exciting.”
IceNode has been funded through JPL’s internal research and technology development program and its Earth Science and Technology Directorate. JPL is managed for NASA by Caltech in Pasadena, California.
How NASA’s OMG found ocean waters are melting Greenland News Media Contact
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Jet Propulsion Laboratory, Pasadena, Calif.
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Last Updated Aug 29, 2024 Related Terms
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By NASA
7 Min Read NASA Project in Puerto Rico Trains Students in Marine Biology
A forested green peninsula of Culebra Island juts into the blue waters of the Caribbean as a rain storm hits in the distance. The teal blue surrounding the island indicates shallow waters, home to the island's famous coral reefs. Credits: NASA Ames/Milan Loiacono Tainaliz Marie Rodríguez Lugo took a deep breath, adjusted her snorkel mask, and plunged into the ocean, fins first. Three weeks earlier, Rodríguez Lugo couldn’t swim. Now the college student was gathering data on water quality and coral reefs for a NASA-led marine biology project in Puerto Rico, where she lives.
“There is so much life down there that I never knew about,” Rodríguez Lugo said. “And it’s beautiful.”
“There is so much life down there that I never knew about, and it’s beautiful.”
Tainaliz Marie Rodríguez Lugo
OCEANOS 2024 Intern
The sea whip and purple sea fans in the photo above are found off the coast of Playa Melones, Culebra, a small island off the east cost of Puerto Rico and a popular destination for snorkelers.
Puerto Rico is home to more than 1,300 square miles of coral reefs, which play a vital role in protecting the island from storms, waves, and hurricanes. Reef-related tourism provides nearly $2 billion in annual income for the island.
But coral reefs in Puerto Rico and around the world are experiencing more frequent and severe bleaching events. High ocean temperatures in regions around the globe have led to coral bleaching, which is when corals expel zooxanthellae – the colorful, symbiotic microscopic algae that live inside coral tissues and provide 80-90% of its nutrients. When stressors persist, the corals eventually starve and turn bone-white.
In April 2024, NOAA (National Oceanic and Atmospheric Administration) announced that the world was experiencing a global bleaching event, the fourth on record. You can see bleached spots in the lobed star coral pictured above, which is also colonized by Ramicrusta, an invasive, burnt orange algae that poses an additional threat to reefs.
Students Are Given Ocean Research Tools
Beginning in June, the month-long program that Rodriguez and 29 other local students participated in is called the Ocean Community Engagement and Awareness using NASA Earth Observations and Science for Hispanic/Latino Students (OCEANOS). The goal of OCEANOS is twofold: to teach Puerto Rican students about marine ecology and conservation, and to train students through hands-on fieldwork how to use marine science tools to monitor the health of coral reefs.
The course included classroom instruction, scientific fieldwork, collecting and analyzing ocean data from La Parguera and Culebra Island, and a final presentation.
In the photo, OCEANOS instructor Samuel Suleiman shows a 3D-printed clump of staghorn coral to a group of students off the coast of Culebra. In areas where coral habitats have been damaged, conservationists use 3D-printed corals to attract and protect fish, algae, and other wildlife.
To practice coral surveying techniques and evaluate biodiversity,students used compact cameras to snap a photo every half second, recording seven-meter by seven-meter quadrants of the ocean floor. Back on land, the students stitched these images – roughly 600 images per quadrant – into high-resolution mosaics, which they then used to catalog the types and distributions of various coral species.
Low Light, Poor Water Quality, and Invasive Species Threaten Coral Reefs
Students also built their own low-cost instruments, with sensors on each end to measure temperature and light, to help assess water quality and characteristics.
The ideal temperature range for coral falls between 77- 82 degrees Fahrenheit (25-28 degrees Celsius). Water above or below this range is considered a potential stressor for coral and can impair growth. It can also increase the risk of disease, bleaching, and reproductive issues.
Coral relies on light for growth. Less light means less photosynthesis for the zooxanthellae that live inside the coral, which in turn means less food for the coral itself. Cloudy water due to excessive sediment or phytoplankton can dim or block sunlight.
Additional threats to coral include fishing equipment, boat groundings, chemical runoff, and invasive species.
In the photo above, OCEANOS instructor Juan Torres-Pérez holds two clumps of cyanobacteria, a type of bacteria that has choked a section of reef near Playa Melones. The exact cause of this excessive cyanobacteria growth is unclear, but it is likely due to land-based pollution leaching into nearby waters, he said. In the background, dark brown piles of cyanobacteria littering the ocean floor are visible.
Students Help Grow and Plant New Coral
Suleiman walked students through the process of planting new coral, which involved tying loose staghorn and elkhorn corals into a square frame. Each frame holds about 100 individual pieces of coral. Suleiman leads a group called Sociedad Ambiente Marino (SAM), which has been working for more than 20 years to cultivate and plant more than 160,000 corals around Puerto Rico.
Divers anchored these frames to the ocean floor. Under ideal conditions, branching species like elkhorn and staghorn coral grow one centimeter per month, or about 12-13 centimeters per year, making them ideal candidates for coral reef restoration. By comparison, mountainous and boulder coral, also prevalent in the Caribbean Sea, grow an average of just one centimeter per year.
The frames will remain on the ocean floor for 10 to 14 months, until the corals have quadrupled in size. At any given time, SAM has about 45 of these frames in coral ‘farms’ around Culebra, totaling almost 4,500 corals.
Once the corals are ready to be planted, they will be added to various reefs to replace damaged or bleached corals, and shore up vulnerable habitats.
In the photo above, Suleiman gathers loose corals to place around an endangered coral species Dendrogyra cylindrus, more commonly referred to as Pillar Coral (front left). This underwater “garden,” as he called it, should attract fish and wildlife such as sea urchins, which will give the endangered coral — and the other species in this small reef — a better chance of survival.
A New Generation of Marine Scientists
From the 2023 OCEANOS class, roughly half of the undergraduate students went on to pursue marine science degrees, and many hope to continue with a post-graduate program. For a scientific field historically lacking diverse voices, this is a promising step.
Among the high school students in the 2023 class, three went on to change their degree plans to oceanography after participating in the OCEANOS program, while others are finding ways to incorporate marine science into their studies.
Francisco Méndez Negrón, a 2023 OCEANOS graduate, is now a computer science student at the University of Puerto Rico at Rio Piedras and wants to apply robotics to marine ecology. “My goal is to integrate computer science and oceanography to make something that can contribute to the problems marine ecosystems are facing, mostly originated by us humans,” Méndez Negrón said. He returned to the OCEANOS program to serve as a mentor for the 2024 class.
As for Tainaliz Marie Rodriguez Lugo, she managed to overcome her swim anxiety while discovering a love of the ocean. She credited the instructors who were patient, encouraging, and never left her side in the water.
“I was really scared going into this internship,” Rodríguez Lugo said. “I didn’t know how to swim, and I was starting a program literally called ‘Oceans.’ But now I love it: I could spend all day in the ocean.”
I was really scared going into this internship. I didn’t know how to swim, and I was starting a program literally called ‘Oceans.’ But now I love it: I could spend all day in the ocean.
Tainaliz Marie Rodríguez Lugo
OCEANOS 2024 Intern
When asked how she would describe coral to someone who has never seen one, Rodríguez Lugo just laughed. “I can’t. There are no words for it. I would just take them to the reefs.”
For more information about OCEANOS, visit:
https://www.nasa.gov/oceanos
The OCEANOS program’s final session will take place next year. Applications for the 2025 OCEANOS program will open in March. To apply, visit:
https://nasa.gov/oceanos-application
Photographs and story by Milan Loiacono, NASA’s Ames Research Center
About the Author
Milan Loiacono
Science Communication SpecialistMilan Loiacono is a science communication specialist for the Earth Science Division at NASA Ames Research Center.
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Last Updated Aug 28, 2024 Related Terms
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