Global warming causes ice-free region in Antarctica to disappear


You read that headline right, and no, I’m not a climate denialist. In a weird quirk, climate change has stopped the up-swelling of relatively warm ocean water in a specific area of Antarctic waters, resulting in it freezing over. A lid of fresh water, possibly from melting glaciers, has blocked that warmer salt water from reaching the surface.

Deep ocean waters only mix directly to the surface in a few small regions of the global ocean, so this has effectively shut one of the main conduits for deep ocean heat to escape.”

If and when conditions change and the deep waters do surface “it will release decades-worth of heat and carbon from the deep ocean to the atmosphere in a pulse of warming.”