Global Sea Level Fell by About Half a Centimeter !!!!

Global Sea Level Fell by About Half a Centimeter !!!!

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.

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.



The Warmest Period is No Far

This graph depicts the warming trend of the average annual global temperature. The average temperature around the globe in 2011 was almost a degree warmer than it was 50 years ago. The global average surface temperature in 2011 was the ninth warmest since 1880. Global surface temperatures in 2010 tied 2005 as the warmest on record. Nine of the 10 warmest years in the modern meteorological record have occurred since the year 2000. Higher temperatures today are largely sustained by increased atmospheric concentrations of heat-trapping greenhouse gases, especially carbon dioxide.