随着气候变化,海湾流和库罗西奥-奥亚西奥延伸的同步演变
Youngji Joh1, Sang-Wook Yeh2, Thomas L Delworth1
1NOAA/OAR/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, USA.
Science advances
|February 20, 2026
概括
太平洋和大西洋的西部边界流在夏季显示同步的海面温度,受北极海冰的影响. 这种内部变化可能会随着未来的气候变化和北极冰的减少而发生变化.
科学领域:
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
- 大气科学 大气科学
背景情况:
- 已经观察到海湾流和库罗西奥流之间十年的同步.
- 西边界电流延伸 (WBCEs) 呈现出大规模的合变化.
- 了解季节性,可预测性和WBCE的未来变化至关重要.
研究的目的:
- 调查WBCE海面温度 (SST) 协变的季节性和可预测性.
- 检查北极海冰变化和夏季WBCE SST异常之间的联系.
- 评估未来气候变化如何调节这种内部合变化.
主要方法:
- 对观测数据和高分辨率气候模拟的分析.
- 调查北太平洋和北大西洋WBCESSTs之间的共变性.
- 使用模型模拟来探索北极海冰流失对大气模式和WBCEs的影响.
主要成果:
- 在北极夏季观察到的北太平洋和北大西洋WBCE SSTs之间的独特共变性.
- 冷季格陵兰岛和巴伦茨海的冰损失与大气波的增强和南部喷气转移有关,导致夏季WBCE温度异常.
- 夏季WBCE共变性在历史上有所增加,但在未来的气候场景下可能会减弱,北极海冰减少.
结论:
- 夏季WBCE共变性是由内在的气候变性驱动的.
- 北极海冰的消失影响了行星规模的大气波,影响了夏季WBCE温度.
- 未来的辐射强迫可能会改变内部WBCE变量的调制,可能会削弱夏季的共同变量,减少北极海冰.
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