“Skating on the Other Side of the Ice“. Willis Eschenbach returns with an unfounded claim that “for reasons which are not well understood, when one pole warms, the other pole cools.” This is used to justify a belief that sea ice changes balance out between the polar regions (they don’t). Unsurprisingly, the focus is on less definitive sea ice extent, with no mention of the important documented changes in sea ice volume.
The Arctic and Antarctic sea ice environments have substantially different characteristics, so even suggesting that their responses are linked is naïve (or disingenuous). The Arctic sea ice is thinner and partly land-locked. The Antarctic sea ice is thicker, partly driven by glacier outflow, and exposed to ocean circulation.
Why does Willis think the sea ice trends balance out? “The short answer is that we don’t know“. He does offer some suggestions based on an unproven cosmic ray theory or “eddies” in the ocean circulation patterns. Ah. So the post offers neither evidence nor explanation.
The insight that Willis offers on global sea ice trends is…