We all know that the Earth’s experiencing a drastic change in increase of sea level and Arctic and Antarctic caps are experiencing melting of their ice caps. But now there’s a matter for concern. According to our sources, the southern ice cap of the Earth; Antarctica has lost so much ice that it has caused a shift in Earth’s gravity, according to a new study. The European Space Agency (ESA)’s GOCE satellite has shown that the ice lost from West Antarctica over the last few years has left its signature.
“The loss of ice from west Antarctica between 2009 and 2012 caused a dip in the gravity field over the region,” ESA said in a statement.
More than doubling its planned life in orbit, GOCE spent four years measuring Earth’s gravity in unprecedented detail. Scientists are now armed with the most accurate gravity model ever produced. This is leading to a much better understanding of many facets of our planet – from the boundary between Earth’s crust and upper mantle to the density of the upper atmosphere.
The strength of gravity at Earth’s surface varies subtly from place to place owing to factors such as the planet’s rotation and the position of mountains and ocean trenches.
Apparently, these not so small changes in the mass of large ice sheets can also cause small local variations in gravity, according to ESA. Here’s another interesting piece of information; between 2011 and 2014, Antarctica as a whole has been shrinking in volume by 125 cubic kilo meters a year, the statement said.
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