Arctic Sea Ice Near Historic Low; Antarctic Ice Continues Decline

Arctic sea ice retreated to near-historic lows in the Northern Hemisphere this summer, likely melting to its minimum extent for the year on Sept.11, 2024, according to researchers at NASA and the National Snow and Ice Data Center (NSIDC). The decline continues the decades-long trend of shrinking and thinning ice cover in the Arctic Ocean.

The amount of frozen seawater in the Arctic fluctuates during the year as the ice thaws and regrows between seasons. Scientists chart these swings to construct a picture of how the Arctic responds  over time to rising air and sea temperatures and longer melting seasons. Over the past 46 years, satellites have observed persistent trends of more melting in the summer and less ice formation in winter.

Tracking sea ice changes in real time has revealed wide-ranging impacts, from losses and changes in polar wildlife habitat to impacts on local communities in the Arctic and international trade routes.

This year, Arctic sea ice shrank to a minimal extent of 1.65 million square miles (4.28 million square kilometers). That’s about 750,000 square miles (1.94 million square kilometers) below the 1981 to 2010 end-of-summer average of 2.4 million square miles (6.22 million square kilometers). The difference in ice cover spans an area larger than the state of Alaska. Sea ice extent is defined as the total area of the ocean with at least 15% ice concentration.

Seventh-Lowest in Satellite Record

This year’s minimum remained above the all-time low of 1.31 million square miles (3.39 million square kilometers) set in September 2012. While sea ice coverage can fluctuate from year to year, it has trended downward since the start of the satellite record for ice in the late 1970s. Since then, the loss of sea ice has been about 30,000 square miles (77,800 square kilometers) per year, according to NSIDC.

Scientists currently measure sea ice extent using data from passive microwave sensors aboard satellites in the Defense Meteorological Satellite Program, with additional historical data from the Nimbus-7 satellite, jointly operated by NASA and the National Oceanic and Atmospheric Administration (NOAA).

Today, the overwhelming majority of ice in the Arctic Ocean is thinner, first-year ice, which is less able to survive the warmer months. There is far, far less ice that is three years or older now,

Nathan Kurtz

Chief, NASA’s Cryospheric Sciences Laboratory

Sea ice is not only shrinking, it’s getting younger, noted Nathan Kurtz, lab chief of NASA’s Cryospheric Sciences Laboratory at the agency’s Goddard Space Flight Center in Greenbelt, Maryland.

“Today, the overwhelming majority of ice in the Arctic Ocean is thinner, first-year ice, which is less able to survive the warmer months. There is far, far less ice that is three years or older now,” Kurtz said.

Ice thickness measurements collected with spaceborne altimeters, including NASA’s ICESat and ICESat-2 satellites, have found that much of the oldest, thickest ice has already been lost. New research out of NASA’s Jet Propulsion Laboratory in Southern California shows that in the central Arctic, away from the coasts, fall sea ice now hovers around 4.2 feet (1.3 meters) thick, down from a peak of 8.8 feet (2.7 meters) in 1980.

Another Meager Winter Around Antarctica

Sea ice in the southern polar regions of the planet was also low in 2024. Around Antarctica, scientists are tracking near record-low sea ice at a time when it should have been growing extensively during the Southern Hemisphere’s darkest and coldest months.

Ice around the continent is on track to be just over 6.6 million square miles (16.96 million square kilometers). The average maximum extent between 1981 and 2010 was 7.22 million square miles (18.71 million square kilometers).

The meager growth so far in 2024 prolongs a recent downward trend. Prior to 2014, sea ice in the Antarctic was increasing slightly by about 1% per decade. Following a spike in 2014, ice growth has fallen dramatically. Scientists are working to understand the cause of this reversal. The recurring loss hints at a long-term shift in conditions in the Southern Ocean, likely resulting from global climate change. 

“While changes in sea ice have been dramatic in the Arctic over several decades, Antarctic sea ice was relatively stable. But that has changed,” said Walt Meier, a sea ice scientist at NSIDC. “It appears that global warming has come to the Southern Ocean.”

In both the Arctic and Antarctic, ice loss compounds ice loss. This is due to the fact that while bright sea ice reflects most of the Sun’s energy back to space, open ocean water absorbs 90% of it. With more of the ocean exposed to sunlight, water temperatures rise, further delaying sea ice growth. This cycle of reinforced warming is called ice-albedo feedback.

Overall, the loss of sea ice increases heat in the Arctic, where temperatures have risen about four times the global average, Kurtz said.

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Educational Activities in Space

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Educational Activities in Space

Science in Space: September 2024

As students of all ages returned to school this month, crew members on the International Space Station continue to conduct a variety of educational programs and activities that support learning on the ground. These efforts are part of a wider commitment at NASA to engage, inspire, and attract future generations of explorers and to build a diverse future workforce equipped with skills in science, technology, engineering, and mathematics (STEM).

One current activity is Robo-Pro Challenge 5, an educational program hosted by JAXA (Japan Aerospace Exploration Agency) in cooperation with NASA. For the challenge, students create software programs to control NASA’s Astrobee and JAXA’s Internal Ball Camera, using image processing to move the free-flying robots through a series of coordinates to a target point. The challenge helps support computing and coding curricula, and the hands-on experience inspires the study of STEM subjects.

Analyzing DNA in space

Genes in Space is a national contest for students in grades 7 through 12 to design DNA analysis experiments for the space station. It is sponsored by the ISS National Lab and New England Biolabs in collaboration with Boeing and miniPCR bio. There have been more than a dozen contests to date, many producing significant results.

Genes in Space-5 provided proof of concept of simultaneously amplifying multiple DNA sequences in space, expanding the possibilities for in-flight research and health monitoring.

Genes in Space-6 used CRISPR-Cas9 genome editing for the first time in space, using the technique to generate breaks in the DNA of a common yeast, direct a method to repair the breaks, and sequence the patched-up DNA to determine whether its original order was restored.

Genes in Space-9 validated technology used to synthesize proteins without needing living cells. This technique could produce proteins for research, vaccines, and development of diagnostic tests for environmental contaminants and infectious agents. Ultimately, such synthesis also could enable portable, low-cost devices for health monitoring, detection of environmental hazards on Earth and in space, and other applications.

Sending code to space

In addition to the Robo-Pro challenge, several other programs involve student coding. AstroPi, a program from ESA (European Space Agency), uses special computers, one equipped with an infrared camera and the other with a standard visible spectrum camera. European students write programs for the computers that address specific challenges such as measurement and calibration and image processing. One project successfully identified and computed the horizontal wavelengths of atmospheric gravity waves in clouds.

Zero Robotics also is a competition where students write software to control one of the Astrobees, co-led by the Massachusetts Institute of Technology, the Innovation Learning Center, and other collaborators. Finalists have their code downloaded to the Astrobee platform and can observe its performance in space.

Students have good “HUNCHes”

High school students United with NASA to Create Hardware, or HUNCH, is a learning program where high school students design and fabricate real-world products for NASA. More than 2,500 students have participated to date, flying some 3,000 products to space, including a tape dispenser that can be operated with one hand, footpads, sleeping pad liners, and orange blackberry croissants and other food products.

Very long-distance calls

Through ISS Ham Radio, a collaboration with Amateur Radio on the International Space Station, students use ham radio to ask astronauts questions about life in space, career opportunities, and other space-related topics. Participating teachers report that the program has a significant and positive impact on students, increasing interest in all STEM areas. The experiences also help students make real-world connections among disciplines, learn problem-solving, and hone communication skills. To date, more than 100 crew members have communicated with over 1 million students from 49 U.S. states, 63 countries, and every continent.

Out-of-this-world videos

Developed through NASA’s Office of STEM Engagement, STEMonstrations are short educational videos demonstrating science, technology, engineering, and mathematics topics in microgravity for grades K through 12. The videos are available online and every STEMonstration includes materials teachers can use to explore the topics in their classrooms. Six videos released in the past 12 months have been viewed 98,705 times to date across various social media platforms. The program provides students with a connection to NASA and scientific work conducted on the space station, inspiring the next generation of explorers and contributing to a diverse future workforce.

Melissa Gaskill
International Space Station Research Communications Team
NASA’s Johnson Space Center

Search this database of scientific experiments to learn more about those mentioned in this article.

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NASA Helps Build New Federal Sea Level Rise Website

Designed to be user-friendly, the resource contains the latest sea level data, explainers, and other information from several U.S. agencies.

The U.S. Interagency Task Force on Sea Level Change launched the U.S. Sea Level Change website on Monday, Sept. 23. Designed to help communities prepare for rising seas, the site features the latest science on changing sea levels, details about the impact on the environment and coastal communities, and strategies to mitigate the consequences. NASA led the development of the website for the task force.

“NASA, together with our partner agencies, has studied climate change and Earth’s rising seas for decades,” said Karen St. Germain, director of the Earth Science Division at NASA Headquarters in Washington. “The data collected by our satellites and ground-based instruments is crucial to helping policymakers and communities prepare for the consequences of sea level rise. By combining NASA data with information from other federal agencies, the U.S. Sea Level Change website is the latest example of government working for the benefit of humanity.”

Demonstrating a whole-of-government approach, the sea level task force sits within the U.S. Global Change Research Program and includes leading researchers from NASA, the Department of Defense, the Environmental Protection Agency, the Federal Emergency Management Agency, the National Oceanic and Atmospheric Administration (NOAA), the U.S. Agency for International Development, the U.S. Army Corps of Engineers, and the U.S. Geological Survey.

They’ve designed a user-friendly hub that brings together information on sea level change from the various federal agencies. While being detailed and accurate for resource managers, researchers, and others seeking more technical information, the website is intended to be accessible to anyone interested in the latest science and strategies to cope with rising seas.

“Everyone will have access to accurate sea level and flooding information in their favorite U.S. coastal city and see the timing of the projected increase in water levels and flooding frequency,” added Nadya Vinogradova Shiffer, who directs NASA’s sea level change team as well as the ocean physics program at the agency’s headquarters in Washington.

The contributing federal agencies focus on different aspects of sea level rise, including basic scientific research and the effects of rising seas on the environment, as well as infrastructure. With the new site, users can explore the topic from different angles.

“Having this information in one place, delivered in a consistent and authoritative way through a true interagency effort, represents a big step forward for how the federal government helps coastal communities prepare for future sea level rise,” said Ben Hamlington, a sea level researcher at NASA’s Jet Propulsion Laboratory in Southern California.

Site visitors can find explainers on sea level science, summaries of what rising seas will look like for various parts of U.S. coastlines, and updates to the 2022 interagency report on sea level rise. The report concluded that U.S. coastlines will experience an average of 10 to 12 inches (25 to 30 centimeters) of rise above current sea levels by 2050 and that the amount of rise in the next 30 years could equal the total rise seen over the past 100 years.

The report also outlined near-term sea level rise under various levels of greenhouse gas emissions, from best-case to business-as-usual to worst-case scenarios. The scenarios are based on improved scientific understanding of how melting glaciers and ice sheets — as well as upward and downward vertical land motion — will affect ocean heights at our coasts. The data and scenarios have been updated for the task force website.

NASA contributions to the 2022 interagency report, as well as to the newly launched sea level website, are part of ongoing agency work to understand Earth’s rising seas. NASA’s efforts to monitor the ocean span more than 30 years and include satellites such as Sentinel-6 Michael Freilich and the Surface Water and Ocean Topography (SWOT) mission. Both were jointly developed by the agency and international and domestic partners. Agency partners on Sentinel-6 Michael Freilich include ESA (European Space Agency), the European Organisation for the Exploitation of Meteorological Satellites, and NOAA. For SWOT, NASA partners include the French space agency CNES (Centre National d’Études Spatiales), CSA (the Canadian Space Agency), and the UK Space Agency.

For more on how NASA studies our home planet, see:

http://www.nasa.gov/earth

News Media Contacts

Elizabeth Vlock / Aries Keck
NASA Headquarters, Washington
202-358-1600 / 202-604-2356
elizabeth.a.vlock@nasa.gov / aries.keck@nasa.gov

Jane J. Lee / Andrew Wang
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-0307 / 626-379-6874
jane.j.lee@jpl.nasa.gov / andrew.wang@jpl.nasa.gov

2024-127

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Girls in STEM Inspired to Fly High at NASA Kennedy

For the third straight year, scores of young women flew to NASA’s Kennedy Space Center in Florida to learn how to make their aviation dreams take flight as part of the Delta Air Lines Women Inspiring our Next Generation (WING) program. Their Boeing 737 aircraft, piloted by an all-female crew, carried 130 girls, ages 11 to 18, who hail from Atlanta area schools and aviation organizations with a strong focus on STEM.

They departed Atlanta’s Hartsfield-Jackson International Airport just after sunrise on Sept. 20 and just a few hours later, stepped onto the runway of Kennedy’s Launch and Landing Facility, where dozens of space shuttle missions landed and current-day NASA astronauts arrive at ahead of their launches to the International Space Station.

“For more than 60 years, Kennedy Space Center has been the launching point for many of the missions that have inspired the nation and challenged generations of students to reach for the stars,” said NASA Kennedy Director Janet Petro. “As an aviator myself, today is especially exciting because it showcases the diverse range of career opportunities available to young women interested in pursuing fields in science, technology, engineering, and math.”

The girls received a bus tour of NASA Kennedy facilities and photo opportunities at Launch Complex 39B, where the first woman to set foot on the Moon will launch in the coming years on Artemis III. Then at the spaceport’s Space Systems Processing Facility, the girls heard firsthand from NASA Kennedy’s women leaders, who offered encouragement and words of wisdom.

“I want you to look around you. The young women in this room are going to be the trailblazers of the Artemis Generation,” said Dicksy Chrostowski, director of the Office of Communications at NASA Kennedy. “You may very well live and work on the Moon, or be one of our first visitors to Mars. There is always a path to greatness for you to take, even if it’s hard to find.”

The girls of the Delta WING flight finished their day exploring the Kennedy Space Center Visitor Complex before reboarding the plane for their return trip to Atlanta. The experience of visiting NASA’s iconic spaceport and the lessons imparted by the women of NASA resonated with the girls.

“As a woman of color, it’s great to see other women who look like me in these spaces and it’s very uplifting to hear their stories and how far they’ve come,” said Karsyn Britton-Mauge, a seventh grader from the Ron Clark Academy in Atlanta. “Life is filled with ups and downs, and I am so inspired by the persistence in all the women who spoke to us today. They never stopped pursuing their dreams.”

The focus on STEM education as a path to a career in aviation has been a key feature of the annual Delta WING flight since the program launched in 2015. That’s when Delta General Manager of Pilot Development Beth Poole and Delta Pilot Cheri Rohlfing noted a conspicuous lack of women in certain roles of the airline industry, including mechanics, ground personnel, and especially pilots. They initiated Delta WING flights, spearheaded by Delta’s Flight Operations and organized and operated solely by women, as a way of inspiring and educating the next generation of young women on careers in aviation. This year’s trip to NASA Kennedy was the eighth Delta WING flight and third to Kennedy.

“The accomplishments of the future are going to be realized by the dreamers, innovators, and bright minds who are sitting in classrooms today,” Petro said. “And we want these students to know there is a place for them at NASA.”

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Jason Costa

Lead Astromaterial Curation Engineer Salvador Martinez III

“My parents came here from Mexico with the vision of giving us a better life than they had but, times were tough. When I was young, there were many days and nights where we had to get by with what we had. My dad worked his way up in the fabrication industry in Houston and when an opportunity came for him to start his own business, he took it. It was “now or never”. Shortly after, things changed. By the time I was in 5^thgrade, our lives took a turn for the better, and going to college all of a sudden became a possibility. But even then, working at NASA felt like it could happen in a dream.

“Growing up here in Houston, you visit Space Center and you look at JSC , and you think, ‘Man, it must be incredible to be a part of NASA and to be a part of one of those amazing missions where you accomplish impossible things and maybe even discover something new about our universe’. I would have never guessed, never predicted, that I would be here. Throughout my career, I just continued to do the best I could and kept learning, striving to get better. 

“It took years but it felt like all of the sudden, I was here and everything, the entire time, was preparing me for my role on the OSIRIS-REx mission. Now, I share a place in history next to a Curation team full of the most talented, intelligent and hard-working individuals in the world and all that we have accomplished is, and will be, a part of NASA forever. I can’t even begin to describe what that means to not only me, but for my family, who did everything they could so that this could even be a possibility. For all of us, it is a dream come true.” 

—Salvador Martinez III, Lead Astromaterial Curation Engineer, Jacobs Technology, NASA’s Johnson Space Center

Image Credit: NASA/James Blair
Interviewer: NASA/Thalia Patrinos

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