Update: In an earlier version the legend on the graph had blue labeled as Antarctic even though it was Arctic. The body of the post had it right (thanks Tom,Hugh,Tom,Anthony,Mike and Sundance for noticing ).
The green is the AMO – Atlantic Multidecadal Oscillation. The red is Antarctic Sea Ice Extent. The blue is the Arctic Sea Ice Extent.
The dashed lines are the liner trends for each.
There are three amazing things:
1) The AMO trend is identical to the Antarctic trend even though the AMO is the sea surface trend of the North Atlantic Ocean! The trend are so close it is hard to see the AMO and Antarctic trends as separate items.
2) The Arctic trend…
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