NASA Global Sea Levels

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A new NASA study finds that global sea level, which dipped sharply in 2010-11 due to a strong La Nina event, has recovered and resumed its long-term upward climb. Image credit: NASA/JPL-Caltech/CNES

What Goes Down Goes Down Must Come Up

For most of the past two decades, the NASA and European Topex/Poseidon, Jason-1 and Jason-2 satellites have tracked the gradual rise of the world’s ocean in response to global warming. In August 2011, scientists at NASA’s Jet Propulsion Laboratory, Pasadena, Calif., and the University of Colorado in Boulder reported that global sea level rise had hit a speed bump (see “NASA Satellites Detect Pothole on Road to Higher Seas“).

The researchers found that between early 2010 and summer 2011, global sea level fell sharply, by about a quarter of an inch, or half a centimeter. Using data from the NASA/German Aerospace Center’s Gravity Recovery and Climate Experiment (GRACE) spacecraft, they showed that the drop was caused by the very strong La Nina that began in late 2010. This periodic Pacific Ocean climate phenomenon changed rainfall patterns all over our planet, moving huge amounts of Earth’s water from the ocean to the continents, primarily to Australia, northern South America and Southeast Asia.

Now, a new paper published recently in the journal Geophysical Research Letters documents the effects of the 2010-11 La Nina on global sea level and updates the measurements. The result: as predicted, by mid-2012, global mean sea level had not only recovered from the more than 0.2 inches (5 millimeters) it dropped in 2010-11, but had resumed its long-term mean annual rise of 0.13 inches (3.2 millimeters) per year. Results of the new study are presented graphically at:http://www.nasa.gov/topics/earth/features/pia16294.html .

“The water the ocean ‘lost’ was compensated for rather quickly,” said lead study author Carmen Boening of JPL. “The newest data clearly indicate that the drop in 2010-11 was only temporary.”

JPL co-author Josh Willis added that, like clockwork, the long-term rise of the ocean marches on. “The dip in global sea levels, brought to us courtesy of a major La Nina event, was little more than a pothole in the long road toward a rising ocean and shrinking coastlines,” he said.

“In 2011, we detected a lot of water that was temporarily stored over land, causing severe flooding in some regions,” said JPL co-author Felix Landerer. “In 2012, we have seen much of this water find its way back into the ocean.”

For more information on NASA’s satellite altimetry missions, visit: http://sealevel.jpl.nasa.gov/ . For more on GRACE, visit:http://www.csr.utexas.edu/grace/ .

NASA Global Sea Levels

 

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In 1995 At Maui High Performance Computing Center The Maui Scientific Analysis & Visualization of the Environment Program was first incubated. I was the principal investigator of this independant research project which was a joint development between MHPCC, Silicon Graphics Computers (SGI) & NKO.ORG. Using SGI Cosmo Worlds software, we pioneered the development of Internet based 3D virtual reality GIS based interactive worlds. In 1996 with a network of seven high performance SGI workstations we pioneered development of live streaming MPEG-1, MPEG-2, MPEG-4, Real Video and QuickTime Streaming Server utilizing Kassenna MediaBase software. In Maui 2002 we pioneered and tested the first wireless live streaming video using laptop computers and Maui Sky Fiber's portable 3G wireless device. In Maui we pioneered live streaming video using usb modems from AT&T , Verizon as well as live streaming from iPhone 3 over 3G wireless networks. Today The Maui S.A.V.E. Program has diversified into storm tracking including visualization and analysis of large, memory-intensive gridded data sets such as the National Hurricane Center's wind speed probabilities. I volunteer my services to numerous Disaster Services Organizations. In June 2013 I returned from Hurricane Sandy deployment as a computer operations service associate with the Disaster Services Technology Group assisting as The American Red Cross migrated from a Disaster Response Operation to Long Term Recovery Operations. Pioneering the production/editing and Internet distribution of HD video to sites like Youtube.com and Vimeo.com we are shining the light towards environmental and peace efforts of humans across the globe. Since 1992 I have held the vision of establishing Maui, Hawaii as the environmental sciences center of the world. After His Holiness the 14th Dalai Lama of Tibet came to Maui This vision has expanded to establishing Maui as the environmental & peace center of the world.

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