相关实验视频
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Endocarditis IV: Nursing Management
Published on: June 19, 2025
314
南极冰架可能通过出口地表河流的融水而稳定
Robin E Bell1, Winnie Chu1,2, Jonathan Kingslake1,2
1Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York, New York 10964, USA.
Nature
|April 21, 2017
概括
南极冰架上的活跃河流系统可以输出大量的融水, 防止冰架崩. 这种自然排水为缓解气候变暖的海平面上升提供了关键机制.
科学领域:
- 冰川学
- 气候科学
- 海洋学
背景情况:
- 在冰架上积聚的融水会导致破裂和解体.
- 冰架崩塌加快了冰川流动,导致全球海平面上升.
- 表面河流提供了化水出口的潜在机制.
研究的目的:
- 在南极冰架上调查活跃的融水排水网络.
- 评估这些网络在防止冰架解体方面的作用.
- 评估未来海平面上升预测的影响.
主要方法:
- 在南森冰架上对融水河流和布的实地观测.
- 在融化季节的排水网络行为分析.
- 与其他冰架上的排水系统进行比较.
主要成果:
- 持续的,活跃的融水排水网络从南森冰架输出了大量的融水.
- 一条河流每年只需七天就能输出水.
- 排水网络适应更温暖的条件, 保持更长的活力和出口更多的水.
- 在其他冰架上存在类似的,但不完全相同的网络,其中一些目前保留了融水.
结论:
- 与目前的模型相反, 活跃的地表河可以有效地从南极冰架上输出融水.
- 这些排水系统可能在气候变暖中起到稳定冰架的重要作用.
- 需要进一步的研究来了解控制融水与出口的因素.
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