东南极洲内部的夏季变暖是由印度洋南部变暖引发的
Naoyuki Kurita1, David H Bromwich2,3, Takao Kameda4
1Institute of Space-Earth Environmental Science(ISEE), Nagoya University, Nagoya, Aichi, Japan. nkurita@nagoya-u.jp.
Nature communications
|July 22, 2025
概括
全球变暖正在影响南极洲的内部. 印度洋海面温度的升温正在推动更多的温暖空气进入南极东部冰盖,增加了内部变暖.
科学领域:
- 气候学 气候学 气候学
- 冰川学的冰川学
- 大气科学 大气科学
背景情况:
- 关于全球变暖对南极洲内部冰盖的影响存在不确定性.
- 有限的长期温度观测和数据差距阻碍了对南极内部气候的理解.
- 以前的研究还没有完全捕捉到影响南极内部温度的复杂相互作用.
研究的目的:
- 为了建立一个全面的温度记录南极洲的内部.
- 调查印度洋南部变暖与南极洲内部气候变化之间的联系.
- 评估海面温度 (SST) 动态对东南极冰盖 (EAIS) 的影响.
主要方法:
- 使用了来自三个南极内陆站 (米祖霍,中继站,福建圆顶) 的完整温度记录.
- 使用修正后的再分析数据填补了数据缺口,用于从1993年到2022年的连续温度记录.
- 分析了印度洋南部海面温度 (SST) 趋势及其大气远程连接.
主要成果:
- 从1993年到2022年,所有三个站都观察到年平均温度的统计学上显著的变暖趋势.
- 最快速的变暖发生在南方夏季 (10月至3月).
- 印度洋南部亚热带前线 (STFZ) 中加强的SST前线与进入EAIS的温暖空气增加相关.
结论:
- 南极洲的内陆气候越来越容易受到来自印度洋南部的气候变化的影响.
- 在30年内,STFZ SST梯度的20%增加增加了大气模式推动内部变暖的可能性.
- 这些发现突显了海洋和冰层系统在应对全球变暖时的相互联系.
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