东北太平洋的温暖斑点通过外热带大气的远程连接持续存在
Jian Shi1,2,3, Hao Huang1,2, Alexey V Fedorov4,5
1Frontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Physical Oceanography Laboratory, Ocean University of China, Qingdao, China.
Nature communications
|April 2, 2024
概括
太平洋东北地区的海洋热浪或"热斑"与大气山脊有关. 来自地中海降雨的外热带行星波可以维持这个山脊,影响区域生态系统和北美温度.
科学领域:
- 大气科学 大气科学
- 海洋学 海洋学 海洋学
- 气候动力学 气候动力学
背景情况:
- 东北太平洋 (NEP) 地区的大规模海洋热浪,称为"热斑",对区域生态系统产生重大影响.
- 在NEP上方的异常大气脊对于保持这些温暖的斑点至关重要,并导致北美地区的寒冷时期.
- 之前的研究将这条山脊归因于热带海面温度的远程连接,使得热带以外的影响尚未被探索.
研究的目的:
- 调查可能对NEP上空异常大气脊的热带外贡献.
- 了解将外热带气候变化与NEP海洋热浪联系在一起的机制.
主要方法:
- 分析行星波浪列车及其能量传输路径.
- 研究地中海和北大西洋上降雨异常的作用.
- 检查西流对导波能量的影响.
主要成果:
- 由地中海降雨和北大西洋干旱引发的行星波列车可以将波能量传播到NEP.
- 这波浪能量,由西方喷气引导,在NEP中诱导一个准-barotropic山脊.
- 外热带地区的远程连接被认为是NEP山脊形成的一个因素.
结论:
- 外热带远程连接,特别是来自地中海降雨模式的远程连接,在维持NEP大气山脊方面发挥着重要作用.
- 这些发现为"热泡"事件和北美温度波动的可预测性提供了新的见解.
- 了解这些热带以外的联系可以增强我们对海洋热浪动态的了解.
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