"NASA Satellites Detect Pothole on Road to Higher Seas"
NASA Satellites Detect Pothole on Road to Higher Seas Posted on 4 September 2011 by Rob Painting The following is a re-posted article from the NASA Jet Propulsion Lab Like mercury in a thermometer, ocean waters expand as they warm. This, along with melting glaciers and ice sheets in Greenland and Antarctica, drives sea levels higher over the long term. For the past 18 years, the U.S./French Jason-1 , Jason-2 and Topex/Poseidon spacecraft have been monitoring the gradual rise of the world's ocean in response to global warming. While the rise of the global ocean has been remarkably steady for most of this time, every once in a while, sea level rise hits a speed bump. This past year, it's been more like a pothole: between last summer and this one, global sea level actually fell by about a quarter of an inch, or half a centimeter. Figure 1 - sea level rise 1993-2011 from satel...