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在非静止条件下,在变暖的海洋中重新审视海洋热浪的基线
Omid Beyraghdar Kashkooli1, Poria Mohit Isfahani1, Reza Modarres1
1Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran.
The Science of the total environment
|December 21, 2024
概括
海洋热浪 (MHWs) 正因全球变暖而发生转变. 使用非静止值的新方法揭示了MHW正在成为一个更温暖的常态,只有极端事件最大海面温度显著变化.
科学领域:
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
- 海洋生态海洋生态学
背景情况:
- 海洋热浪 (MHW) 的频率和强度正在增加,对海洋生态系统构成重大威胁.
- 由于持续的全球变暖和气候变化,定义"正常"或基线海面温度 (SST) 是一个挑战.
- 传统的MHW定义可能不准确地反映当前的海洋条件.
研究的目的:
- 提出一种新的方法来定义MHW值,以解释正在进行的SST变暖.
- 在当前的气候条件下,制定一个灵活和现实的框架来识别MHW.
- 调查将非静止性纳入MHW定义的影响.
主要方法:
- 开发了一个新的框架,将非静止性概念纳入 MHW 定义.
- 应用了动态的,非静态的值来描述MHWs.
- 评估了波斯湾和阿曼海的框架,这是一个具有高基准SST的地区.
主要成果:
- 拟议的框架有效地将非静态性纳入MHW值识别中.
- 波斯湾和阿曼海的MHW似乎正在演变为一个新的,更温暖的基线.
- 在大多数MHW指标中没有观察到显著变化,除了极端事件期间的最大SST.
结论:
- 该研究强调了传统的MHW基线在气候变暖中的局限性.
- 纳入非静态性提供了一个更现实的评估MHWs.
- 研究结果表明,MHW可能代表一种新的气候常规,而不是仅仅是极端偏差.
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