地下海洋热浪的垂直结构在浅浅的近岸上游系统中
Gavin Plume1, Ryan K Walter2, Isabelle Cobb1
1Physics Department, California Polytechnic State University, San Luis Obispo, CA, USA.
Scientific reports
|February 21, 2025
概括
海洋热浪 (MHWs) 在地表下比在地表上更频繁,许多底部MHWs独立于地表事件发生. 地下监测对于了解这些对海洋生态系统的威胁至关重要.
科学领域:
- 海洋热浪 (MHWs) 是一种热浪.
- 海洋学 海洋学 海洋学
- 气候变化影响气候变化的影响.
背景情况:
- 在全球范围内,海洋热浪 (MHW) 正在增加,对海洋生态系统构成重大威胁.
- 地下MHWs,特别是在浅水,是研究不足的.
- 现有的监测通常依赖于表面数据,可能错过了关键的地下事件.
研究的目的:
- 描述MHWs在浅,近岸上游系统中的垂直结构.
- 使用长期,全水柱数据来比较表面和地下MHW特征.
- 评估与表面事件相比,底部MHWs的频率和独立性.
主要方法:
- 使用了近二十年的完整水柱 (约. 来自加利福尼亚州中部的一个自动化分析仪的10m) 观测.
- 分析了不同深度的MHW持续时间,强度和频率.
- 相关的MHW启动和终止与沿海上游动态.
主要成果:
- 在深度范围内,MHW的平均持续时间和强度相似,但底部MHW日比表面MHW日频率高17%.
- 近三分之一的底部MHW发生在水面MHW之外,突出了卫星监测的局限性.
- 季节性分层影响了MHW的垂直范围和持续时间;秋冬事件更广泛,而夏季事件的深度有限.
结论:
- 地下MHW是海洋热事件的重要组成部分,并且经常被基于表面的监测所遗漏.
- 沿海上游动力学在水柱中MHWs的启动和终止中发挥着至关重要的作用.
- 扩大地下MHW监测对于全面了解海洋生态系统对气候变化的反应至关重要.
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