While the floating ice in the northern Arctic has behaved as scientists and climate models expected in a warming world – that is, on an apparent terminal declin

While the floating ice in the northern Arctic has behaved as scientists and climate models expected in a warming world – that is, on an apparent terminal decline – Antarctica’s sea ice has held steady. So now the lag in the Southern Hemisphere is going away, and the Southern Hemisphere is finally playing 'catch up' with the Northern Hemisphere. Except that in geological terms where thousands of years are the norm, those decades of lag are negligible, really.