Members Can Post Anonymously On This Site
Satellites launched to boost connectivity and create jobs
-
Similar Topics
-
By NASA
4 min read
NASA Satellites Reveal Abrupt Drop in Global Freshwater Levels
Earth (ESD) Earth Home Explore Climate Change Science in Action Multimedia Data For Researchers GRACE satellites measure gravity as they orbit the planet to reveal shifting levels of water on the Earth (artist’s concept). NASA/JPL-Caltech An international team of scientists using observations from NASA-German satellites found evidence that Earth’s total amount of freshwater dropped abruptly starting in May 2014 and has remained low ever since. Reporting in Surveys in Geophysics, the researchers suggested the shift could indicate Earth’s continents have entered a persistently drier phase.
From 2015 through 2023, satellite measurements showed that the average amount of freshwater stored on land — that includes liquid surface water like lakes and rivers, plus water in aquifers underground — was 290 cubic miles (1,200 cubic km) lower than the average levels from 2002 through 2014, said Matthew Rodell, one of the study authors and a hydrologist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “That’s two and a half times the volume of Lake Erie lost.”
During times of drought, along with the modern expansion of irrigated agriculture, farms and cities must rely more heavily on groundwater, which can lead to a cycle of declining underground water supplies: freshwater supplies become depleted, rain and snow fail to replenish them, and more groundwater is pumped. The reduction in available water puts a strain on farmers and communities, potentially leading to famine, conflicts, poverty, and an increased risk of disease when people turn to contaminated water sources, according to a UN report on water stress published in 2024.
The team of researchers identified this abrupt, global decrease in freshwater using observations from the Gravity Recovery and Climate Experiment (GRACE) satellites, operated by the German Aerospace Center, German Research Centre for Geosciences, and NASA. GRACE satellites measure fluctuations in Earth’s gravity on monthly scales that reveal changes in the mass of water on and under the ground. The original GRACE satellites flew from March 2002 to October 2017. The successor GRACE–Follow On (GRACE–FO) satellites launched in May 2018.
This map shows the years that terrestrial water storage hit a 22-year minimum (i.e., the land was driest) at each location, based on data from the GRACE and GRACE/FO satellites. A significantly large portion of the global land surface reached this minimum in the nine years since 2015, which happen to be the nine warmest years in the modern temperature record. Image by NASA Earth Observatory/Wanmei Liang with data courtesy of Mary Michael O’Neill The decline in global freshwater reported in the study began with a massive drought in northern and central Brazil, and was followed shortly by a series of major droughts in Australasia, South America, North America, Europe, and Africa. Warmer ocean temperatures in the tropical Pacific from late 2014 into 2016, culminating in one of the most significant El Niño events since 1950, led to shifts in atmospheric jet streams that altered weather and rainfall patterns around the world. However, even after El Niño subsided, global freshwater failed to rebound. In fact, Rodell and team report that 13 of the world’s 30 most intense droughts observed by GRACE occurred since January 2015. Rodell and colleagues suspect that global warming might be contributing to the enduring freshwater depletion.
Global warming leads the atmosphere to hold more water vapor, which results in more extreme precipitation, said NASA Goddard meteorologist Michael Bosilovich. While total annual rain and snowfall levels may not change dramatically, long periods between intense precipitation events allow the soil to dry and become more compact. That decreases the amount of water the ground can absorb when it does rain.
“The problem when you have extreme precipitation,” Bosilovich said, “is the water ends up running off,” instead of soaking in and replenishing groundwater stores. Globally, freshwater levels have stayed consistently low since the 2014-2016 El Niño, while more water remains trapped in the atmosphere as water vapor. “Warming temperatures increase both the evaporation of water from the surface to the atmosphere, and the water-holding capacity of the atmosphere, increasing the frequency and intensity of drought conditions,” he noted.
While there are reasons to suspect that the abrupt drop in freshwater is largely due to global warming, it can be difficult to definitively link the two, said Susanna Werth, a hydrologist and remote sensing scientist at Virginia Tech, who was not affiliated with the study. “There are uncertainties in climate predictions,” Werth said. “Measurements and models always come with errors.”
It remains to be seen whether global freshwater will rebound to pre-2015 values, hold steady, or resume its decline. Considering that the nine warmest years in the modern temperature record coincided with the abrupt freshwater decline, Rodell said, “We don’t think this is a coincidence, and it could be a harbinger of what’s to come.”
By James R. Riordon
NASA’s Earth Science News Team
Share
Details
Last Updated Nov 15, 2024 Editor James Riordon Contact James Riordon james.r.riordon@nasa.gov Location NASA Goddard Space Flight Center Related Terms
Earth Goddard Space Flight Center GRACE (Gravity Recovery And Climate Experiment) GRACE-FO (Gravity Recovery and Climate Experiment Follow-on) Water on Earth Explore More
4 min read NASA Satellites Find Snow Didn’t Offset Southwest US Groundwater Loss
Record snowfall in recent years has not been enough to offset long-term drying conditions and…
Article
5 months ago
Keep Exploring Discover More Topics From NASA
Earth
Your home. Our Mission. And the one planet that NASA studies more than any other.
Climate Change
NASA is a global leader in studying Earth’s changing climate.
How Earth’s Surface and Interior are Connected to Freshwater Availability
Explore Earth Science
View the full article
-
By European Space Agency
Torrential rainfall causing deadly flash floods has hit southern and eastern Spain in regions including the Costa del Sol, where the city of Malaga is located, and Valencia in the east. As these areas struggle to cope with the aftermath, satellite technology has played a crucial role in assessing the damages of the affected areas.
View the full article
-
By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Candeska Cikana Community College uses selective laser sintering, a type of 3D-printing in which heat and pressure form specific structures using layers of powdered material. Shown here, a student works to remove excess material, in this case a powdered form of nylon with carbon fibers, to reveal a prototype of the “Mapi Hapa,” or “sky shoe.” Candeska Cikana Community College Human exploration on the lunar surface is no small feat. It requires technologists and innovators from all walks of life to tackle many challenges, including feet.
From designing astronaut boots, addressing hazardous Moon dust, and researching new ways to land on Mars, NASA is funding valuable research through M-STAR (Minority University Research and Education Project’s (MUREP) Space Technology Artemis Research). The M-STAR program provides opportunities for students and faculty at Minority Serving Institutions to participate in space technology development through capacity building and research grants. With more than $11.5 million awarded since 2020, M-STAR aims to ensure NASA isn’t leaving any potential solution behind.
Best Foot Forward
Nicholas Bitner from Candeska Cikana Community College, left, and Jesse Rhoades from the University of North Dakota (UND), right, are pictured in UND’s BiPed lab, where their students test and capture motion data for the Mapi Hapa. Walter Criswell, UND Today Supportive boots are required for astronauts who will perform long duration Artemis missions on the Moon. With astronaut foot health in mind, students and faculty of North Dakota’s Candeska Cikana Community College in Fort Totten and the University of North Dakota in Grand Forks are designing a solution for extravehicular activity Moon boots. The project, called Mapi Hapa, proposes a 3D printed device that helps astronauts achieve the range of motion that takes place in the ankle when you draw your toe back towards the shin.
Candeska Cikana Community College is a tribal college that serves the Spirit Lake Nation, including the Dakota, Lakota, Sisseton, Wahpeton, and Yanktonai peoples.
Nicholas Bitner, an instructor at Candeska Cikana and graduate student at the University of North Dakota, notes the unique skills that tribal students possess. “Their perspective, which is unlike that of any other student body, thrives on building with their hands and taking time to make decisions.”
Bitner also attributes many opportunities and successes of their program to M-STAR and its partnership which exemplifies the dire importance of consistent funding.
“Given the relationships, we have been able to expand our capabilities and our lab, but it has also given us funding. We were able to hire all our students in the engineering department as lab technicians. So, they get paid to do the research that they are a part of, and not only do they have that psychological ownership, but they also have a good paying job that looks nice on their resumes.”
In addition to addressing astronaut foot health, M-STAR funding is helping develop solutions to combat lunar regolith, or Moon dust, which can damage landers, spacesuits, and human lungs, if inhaled.
Lunar Dust Development
With M-STAR, New Mexico State University in Las Cruces developed affordable, reliable lunar regolith simulants to help test lunar surface technologies. The team also designed testing facilities that mimic environmental conditions on the Moon.
New Mexico State has already started sharing their simulants, including with a fellow M-STAR awardee. An M-STAR project selected in 2023 from the University of Maryland Eastern Shore in Princess Anne uses the simulants to help test their experience in smart agriculture to test applications for crop production on the Moon.
University of Maryland, Eastern Shore explores the possibility of growing crops in lunar regolith by mixing varying proportions of lunar regolith simulant, horse manure, and potting soil. The lunar regolith simulant was provided by fellow M-STAR awardee at New Mexico State University in in Las Cruces.Stephanie Yeldell/NASA Douglas Cortez, associate professor in civil engineering at New Mexico State, believes different perspectives are essential to maximizing solutions.
“There are hundreds of people working at Minority Serving Institutions that are used to looking at the world in a completely different way,” said Cortez. “When they start looking at the same problem and parameters, they come up with very different solutions.”
As we look to sustainable presence on the Moon, NASA also has its sights set on Mars and M-STAR is helping develop technologies to inform crewed Martian exploration.
Stick the Landing
San Diego State University in California was awarded funding for research on Mars entry, descent, and landing technologies. The team aims to achieve optimal trajectory by developing onboard algorithms that guide vehicles to descent autonomously.
The M-STAR research opportunities have been invaluable to students like Chris Davami and his teammates working to develop improved methods to land on Mars.
Christopher Davami, who supported San Diego State University’s 2021 M-STAR project, is pictured here at NASA’s Langley Research Center, where he was selected for internships supporting research in aeroelasticity, atmospheric flight, and entry systems research.NASA “I would definitely not have been able to have these opportunities with NASA if it weren’t for M-STAR,” said Davami. “M-STAR helped pay for my education, which helped me save a lot in student loans. I probably wouldn’t be going to graduate school right now if I did not have this opportunity. This program enabled me to keep pursuing my research and continue doing what I love.”
Following his contributions to the M-STAR-funded project, Davami was awarded a NASA Space Technology Graduate Research Opportunity in 2023 on his work in autonomous end-to-end trajectory planning and guidance constrained entry and precision power decent.
Through efforts like M-STAR, NASA aims to seed the future workforce and prepare colleges and universities to win other NASA research opportunities. When it comes to the advancement of space technology, people of different backgrounds and skillsets are needed to achieve what was once known as impossible. Not only can the diversification of ideas spark fundamental innovations in space, but it can also help students apply these technological advancements to solving problems here on Earth.
To learn more about M-STAR visit:
https://go.nasa.gov/442k76s
by: Gabrielle Thaw, NASA’s Space Technology Mission Directorate
Facebook logo @NASATechnology @NASA_Technology Keep Exploring Discover More Topics From NASA
Space Technology Mission Directorate
Student & STEM Opportunities
NASA Grants to Strengthen Diversity in Engineering, STEM Fields
Get Involved
Share
Details
Last Updated Nov 05, 2024 EditorLoura Hall Related Terms
Space Technology Mission Directorate Technology View the full article
-
By NASA
NASA’s work, including its Moon to Mars exploration approach, is advancing science and technology for the Artemis Generation, while also driving significant economic growth across the United States, the agency announced Thursday.
In its third agencywide economic impact report, NASA highlighted how its Moon to Mars activities, climate change research and technology development, and other projects generated more than $75.6 billion in economic output across all 50 states and Washington, D.C., in fiscal year 2023.
“To invest in NASA is to invest in American workers, American innovation, the American economy, and American economic competitiveness,” says NASA Administrator Bill Nelson. “Our work doesn’t just expand our understanding of the universe — it fuels economic growth, inspires future generations, and improves our quality of life. As we embark on the next great chapter of exploration, we are proud to help power economic strength, job creation, scientific progress, and American leadership on Earth, in the skies, and in the stars.”
Combined, NASA’s missions supported 304,803 jobs nationwide, and generated an estimated $9.5 billion in federal, state, and local taxes throughout the United States.
The study found NASA’s Moon to Mars activities generated more than $23.8 billion in total economic output and supported an estimated 96,479 jobs nationwide. For investments in climate research and technology, the agency’s activities generated more than $7.9 billion in total economic output and supported an estimated 32,900 jobs in the U.S.
Additional key findings of the study include:
Every state in the country benefits economically through NASA activities. Forty-five states have an economic impact of more than $10 million. Of those 45 states, eight have an economic impact of $1 billion or more. The agency’s Moon to Mars initiative, which includes the Artemis missions, generated nearly $2.9 billion in tax revenue. These activities provided about 32% of NASA’s economic impact. The agency’s investments in climate change research and technology generated more than $1 billion in tax revenue. Approximately 11% of NASA’s economic impacts are attributable to its investments in climate change research and technology. NASA had more than 644 active international agreements for various scientific research and technology development activities in the 2023 fiscal year. The International Space Station, representing 15 countries and five space agencies, has a predominant role in the agency’s international partnerships. In fiscal year 2023, NASA oversaw 2,628 active domestic and international non-procurement partnership agreements, which included 629 new domestic and 109 new international agreements, active partnerships with 587 different non-federal partners across the U.S., and partnerships in 47 of 50 states. NASA Spinoffs, which are public products and processes that are developed with NASA technology, funding, or expertise, provide a benefit to American lives beyond dollars and jobs. As of result of NASA missions, our fiscal year 2023 tech transfer activities produced 1,564 new technology reports, 40 new patent applications, 69 patents issued, and established 5,277 software usage agreements. Scientific research and development, which fuels advancements in science and technology that can help improve daily life on Earth and for humanity, is the largest single-sector benefitting from NASA’s work, accounting for 19% of NASA’s total economic impact. The study was conducted by the Nathalie P. Voorhees Center for Neighborhood and Community Improvement at the University of Illinois at Chicago.
To review the full report, visit:
https://go.nasa.gov/3NEtUIq
-end-
Meira Bernstein / Melissa Howell
Headquarters, Washington
202-615-1747 / 202-961-6602
meira.b.bernstein@nasa.gov / melissa.e.howell@nasa.gov
Share
Details
Last Updated Oct 24, 2024 LocationNASA Headquarters View the full article
-
By European Space Agency
At the International Astronautical Congress (IAC) in Milan this week, ESA signed a contract for Element #1, the first phase of the HydRON Demonstration System. HydRON, which stands for High thRoughput Optical Network, is set to transform the way data-collecting satellites communicate, using laser technology that will allow satellites to connect with each other and ground networks much faster.
View the full article
-
-
Check out these Videos
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.