Sea Level Study

NASA, US, European Partner Satellite Returns First Sea Level Measurements

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The data in this graphic are the first sea surface height measurements from the Sentinel-6 Michael Freilich (S6MF) satellite, which launched Nov. 21, 2020. They show the ocean off the southern tip of Africa, with red colors indicating higher sea level relative to blue areas, which are lower. Credits: EUMETSAT

Sentinel-6 Michael Freilich, a joint U.S.-European satellite built to measure global sea surface height, has sent back its first measurements of sea level. The data provide information on sea surface height, wave height, and wind speed off the southern tip of Africa.

“We’re excited for Sentinel-6 Michael Freilich to begin its critical work studying sea level and helping us understand the many aspects of our planet’s global ocean,” said Thomas Zurbuchen, NASA’s associate administrator for science at the agency’s headquarters in Washington. “I know Mike would be thrilled that the satellite bearing his name has begun operating, but he’d also be looking forward to studying the data from this important mission, as we all are.”

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Antarctica’s Effect on Sea Level Rise in Coming Centuries

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Esprit Smith

Jet Propulsion Laboratory, Pasadena, Calif.

  

 

Thwaites Glacier. animation shows projections of ice sheet retreat in Antarctica Thwaites Glacier. Credit: NASA/James Yungel

 

 

There are two primary causes of global mean sea level rise – added water from melting ice sheets and glaciers, and the expansion of sea water as it warms. The melting of Antarctica’s ice sheet is currently responsible for 20-25 percent of global sea level rise.

 

But how much of a role will it play hundreds of years in the future?


 

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New NASA Web Portal Shines Beacon on Rising Seas

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Fort Lauderdale, Florida, is at risk from rising sea levels. Credit: Dave/Flickr Creative Commons/CC BY 2.0

 

Sea level rise is a critical global issue affecting millions across our planet. A new Web portal developed by NASA’s Jet Propulsion Laboratory, Pasadena, California, gives researchers, decision makers and the public alike a resource to stay up to date with the latest developments and scientific findings in this rapidly advancing field of study. 

The portal, “Sea Level Change: Observations from Space,” is online at: https://sealevel.nasa.gov/

The portal’s key features include:
 

  • “Understanding Sea Level,” a summary of decades of scientific research that has shaped our knowledge of sea level rise: its causes, including a warming, expanding ocean and melting ice on land; projections of future sea level rise; and ways in which humanity might adapt, largely drawn from NASA data.
     
  • An interactive data analysis tool, launching in mid-2016, that will allow direct access to NASA datasets on sea level. Users will be able to manipulate these datasets to automatically generate charts, graphs and maps of sea surface height, temperature and other factors. The analysis tool will also allow users to make forecasts of future conditions, as well as “hindcasts” — retroactive calculations of past trends and conditions.
     
  • News highlights and feature stories with strong visual elements that explore the findings of sea level researchers in detail.
     
  • An extensive library of published papers on sea level-related topics, hyperlinked to individual citations throughout “Understanding Sea Level.”
     
  • A multimedia section with dynamic still and video imagery, and a glossary of sea level terms.

  • A “frequently asked questions” section maintained by sea level scientists. Users can submit questions to scientists and data managers.


The website is optimized for most mobile devices, including smartphones and tablets.

“Sea Level Change: Observations from Space” is managed by a team led by JPL scientist Carmen Boening. The team is part of the NASA Sea Level Change Team research group. 

“With sea levels rising globally, as observed by satellites over the past decades, sea level change is a hot topic in climate research,” Boening said. “This new tool provides a NASA resource for researchers and a wealth of information for members of the public seeking a deeper understanding of sea level change.”

For more information on NASA’s Earth science activities, visit: http://www.nasa.gov/earth and http://climate.nasa.gov

JPL is a division of the California Institute of Technology in Pasadena.