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On the Pause in Global Sea Ice Anomalies

May 11, 2015

Watts Up With That?

Guest Post by Bob Tisdale

I just finished the illustrations and text for another chapter of my upcoming book. The latest was about sea ice data. I believe you’ll be interested in one of the topics from that chapter. As noted in the title of the post, the topic is the “pause” in global sea ice extent anomalies.

It is well known that there have been gains in sea ice extent and area in the Southern Hemisphere during the satellite era. Those gains have been exceeded by the losses of sea ice in the Northern Hemisphere, so that globally there has been an overall decrease in sea ice extent and area.

There was a resurgence of sea ice globally in 2013 and 2014, however. That recent resurgence allows us to present the data in another way. We can use a linear trend analysis, starting in April 2015, to determine how…

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