3 ms·
Is there any conclusion yet on whether global warming is likely cause polar ice to expand due to failing ocean currents? Or is it more likely that even with cur
by prennert 4y ago
Is there any conclusion yet on whether global warming is likely cause polar ice to expand due to failing ocean currents? Or is it more likely that even with currents collapsing it gets so hot around the poles that the ice keeps melting?
- moloch-hai 4y agoCloud cover modeling is, or was last I checked, wholly inadequate. It seems entirely possible we could tip over into an ice age. If the whole planet became shrouded in fog, insolation would be reflected back without being converted to IR first, so not trapped by CO2. As temperature falls, ice spreads from the poles. Cloud cover dissipates. Ice takes up the job of reflecting insolation. Brrrr.
- euroderf 4y agoTop recommendation: nuclear-powered saunas.
- lproven 4y agoYes, there is, if you avoid the petrochemicals-funded loonies. We are probably heading for about 3º–4º C of warming this century, which very strongly implies an ice-free Arctic and the collapse of the West Antarctic Ice Sheet. That alone suggests circa 5 metres of sea level rise, and Greenland will add more. Isostatic rebound like this will be less than a rounding error in the overall picture.
- elygre 4y agoIf i read the article right, they expect another 40 meters of uplift. Not a rounding error, I think.
- lproven 4y agoNote the timescales! Over millennia. I'm talking about 5-6-7 metres sea level rise in the lifetime of most posters and commenters on HN. In the next 70-odd years. That renders a few cm uplift in the 21st century an utter irrelevance. Stockholm won't be inaccessible by sea; it will be seabed. If we have 4ºC rise this century, there won't be anyone left to write about it. 4ºC in a century is species-extinction level event.