Sunday, 4 December 2016

Global Warming

Loss of ice in the Arctic

 In just 4 days from November 16 - 19, 2016 the Arctic sea ice extent fell 0.16 million km² , as illustrated by the above image image. 
The image below, based on NSIDC data, shows the Arctic sea ice shrinking 49,000 km² in four days. This is happening at a time when there is little or no sunlight reaching the Arctic

This recent fall in extent is partly due to strong winds, mostly, though, the lack of sea ice over the Arctic Ocean is caused by very warm water that is now arriving in the Arctic Ocean.
During the northern summer, water off the coast of North America warms up and gets pushed by the Coriolis force toward the Arctic Ocean. It takes several months for the water to travel along the Gulf Stream through the North Atlantic. It has taken until now for the Arctic Ocean to bear the brunt of this heat.
The image below shows record sea surface anomalies that showed up near Svalbard on October 31, 2016, when this heat first arrived in the Arctic.

The same loss of ice is happening in the Antarctic.

If you want to read more go to arctic-news.blogspot