Heated, the water expands. Along with the melting of the glaciers in Antarctica and Greenland will lead to sea level rise, if global warming is not stopped.For the past 18 years of this process is observed Franco-American spacecraft "Jason-1", "Jason-2" and «TOPEX-Poseidon."
Sea levels are rising by an average of 3.2 mm per year. (Photo by NASA.)Despite the fact that the average sea level rise all the time remained remarkably stable, sometimes the process encountered a "speed bump." And for the past year (since last summer to the present) and is registered a decline of about half a centimeter.Why has this happened and what it means? Climate scientist Josh Willis of NASA's Jet Propulsion Laboratory, believes that the cause is Southern Oscillation Pacific.Scientists note that 2010 began considerable El Niño, but by the end of the year it was replaced by La Niña
— One of the strongest in recent memory. This sudden change has led to a shift in the distribution pattern of precipitation across the globe: Australia and the Amazon rain flooded, and the southern United States has set a terrible drought.Data about what happened with the water at the beginning of 2011, were provided by the German-American satellite GRACE. Source of rainfall that fell in Australia and Brazil, was, of course, the ocean. Each year, a lot of water evaporates, but most rain falls before reaching land. This time, however, the continent has got more than usual, and this water is in no hurry to return to the ocean.That is why the sea level dropped slightly.Prepared according to NASA.