南极洲的“末日冰川”并不像我们想象的那么容易融化 | 科学美国人

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📢  文末扫码进裙，免费领取双语精读版 Antarctica’s ‘Doomsday Glacier’ Isn't as Vulnerable to Collapse as We Thought Scientific American Glacier  23 August, 2024 | 1070 words | ★★ ★ ★ ☆ Thwaites Glacier drains a huge area of Antarctica’s ice sheet – about 74,000 square miles(192,000 square kilometers), an expanse bigger than Florida. If a snowflake falls within that drainage system, it will eventually end up as part of an iceberg in the ocean off Thwaites. What we are seeing with Thwaites Glacier right now is a disaster in slow motion. The bedrock under Thwaites Glacier sits below sea level and slopes downward going inland, so the glacier gets deeper toward the interior of the ice sheet. Once the glacier begins losing more ice than it gains from new snowfall and starts to retreat, it’s very hard to slow it down because of this slope. And Thwaites is already retreating at an accelerating rate as the climate warms. Thwaites Glacier holds enough i ………………………………