海洋表面温度对大气河流的反应
Tien-Yiao Hsu1, Matthew R Mazloff2, Sarah T Gille2
1Scripps Institution of Oceanography, University of California San Diego, La Jolla, 92093, CA, USA. tienyiao@ucsd.edu.
Nature communications
|June 12, 2024
概括
大气河流 (ARs) 通过空气-海相互作用显著影响海面温度 (SST). 海洋动力学,特别是向和混合,可以抵消AR引起的变暖,影响沿海天气模式.
科学领域:
- 大气河流 大气河流
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
背景情况:
- 大气河流 (ARs) 是极端天气和沿海影响的主要驱动因素.
- 预测两周以后的AR是具有挑战性的,海面温度 (SST) 动态可能提供预测性见解.
- 空气与海之间的相互作用对于了解AR对海洋状况的影响至关重要.
研究的目的:
- 研究大气河流对北太平洋海面温度的影响.
- 分析海洋动态在改变SST对ARs反应中的作用.
- 确定影响AR事件期间SST趋势的关键海洋学过程.
主要方法:
- 对25年海洋再分析数据的分析.
- 应用SST预算方程来量化热流和动态.
- 对ARs的SST倾向反应的空间解析分析.
主要成果:
- 海洋动力学可以抵消超过100%的AR诱导的异常SST变暖在强烈海洋修饰的地区.
- 年龄向和垂直混合是SST趋势修改的主要驱动因素.
- 观察到空间上不同的SST对AR的反应,在不同地区有不同的机制,如加利福尼亚沿海.
结论:
- 海洋动态在调节SST对大气河流的反应中起着至关重要的作用.
- 了解这些空海相互作用对于改善AR预测和预测沿海影响至关重要.
- 降低云层覆盖和增加短波辐射也导致某些地区的AR驱动的SST变暖.
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