Flat Earthers Won't Believe This News on Antarctica's Climate
The Arctic is the
, but so far, its polar opposite has managed to stay pretty cool. Why is
Parts of our round Earth are flat; others are rugged and mountainous. Antarctica is a diverse landscape of snow-covered mountains , gaping chasms, rivers, lakes, and waterfalls , with the highest average elevation of any continent. Marc Salzmann, researcher at the Institute for Meteorology at the University of Leipzig, thinks that extra height helps explain why Antarctica is warming up slowly, while the Arctic sizzles away like a popsicle in the summer sun .
"Originally, most people thought that the reason you have rapid
To test the hypothesis that elevation may be buffering Antarctica from the heat of 7 billion gas guzzling humans, Salzmann ran computer models of the landscape in a world with double the atmospheric carbon dioxide of the present. In one scenario, Antarctica was given its normal topography, in another, it was flatted out the way Shaq would want it to be . All else equal, his model runs showed that if the land height is reduced, temperatures respond more strongly to rising greenhouse gases.
"Antarctica warmed a lot more quickly when flattened out," Salzmann said, noting that the continent became "more comparable to the Arctic," but that land elevation couldn't completely explain the discrepancy between the two. Salzmann says that a flat Antarctica allows more advection of warm air from the tropics to sweep over the continent.
It's important to note that this is just one model that doesn't account for every factor, and plenty of other scientists have their own ideas for why Antarctica is responding slowly to global warming compared with the Arctic. Those ideas include deep ocean convection around Antarctica, the ratio of land to water, and perhaps, additional heat uptake in the Southern Ocean thanks to the ozone hole . (Nice job, humans.)
Ken Caldeira, a
"Another thing to note is that Antarctica being high means that more of the atmosphere is pushed to the rest of the planet," Caldeira said. "Because Antarctica is high, everyplace else has a little more greenhouse gas over it and thus a little more warming influence."
It's also worth emphasizing that Antarctica
heating up, will continue to heat up, and that we should be worried about the consequences. The West Antarctic ice sheet's Amunden sea embayment, which contains enough frozen water to raise global sea levels by four feet, is already
. Several years back, researchers at NASA's Jet Propulsion Laboratory declared its eventual collapse "
Sometimes, the little things you'd never think of, like the reality of living on a lumpy ball, can have a big impact. So, too, can a few whiffs of invisible gas in the air.