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观测证据表明,热带气旋引起的海洋热是由热带气旋引起的
1Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, Indiana 47907, USA.
Nature
|June 1, 2007
概括
热带气旋显著冷却热带海洋,并推动垂直混合. 这一过程约占海洋热传输峰值的15%,影响了全球气候模型.
科学领域:
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
- 海洋生物学 海洋生物学
背景情况:
- 海洋混合对全球气候调节和海洋生态系统至关重要,影响热量和营养物质的运输.
- 对海洋混合的直接测量低于预算推断的比率,这表明没有量化混合过程.
- 众所周知,热带气旋会导致局部海洋混合,但它们在全球范围内的影响仍然未经测试.
研究的目的:
- 为了测试热带气旋是全球范围内重要的海洋混合剂的假设.
- 量化热带气旋活动引起的垂直混合.
- 评估热带气旋引起的混合对海洋热传输的贡献.
主要方法:
- 热带气旋通过之前和之后的海面温度进行比较.
- 基于观察到的温度变化计算垂直混合.
- 估计这种混合对极向热传输的贡献.
主要成果:
- 热带气旋导致热带表面海洋显著降温和垂直混合.
- 大约15%的海洋热传输峰值归因于热带气旋引起的混合.
- 混合的程度与海面温度有很强的相关性.
结论:
- 热带气旋是全球海洋混合和热传输的重要驱动因素.
- 未来海洋表面温度的变化可能会以目前气候模型无法捕捉的方式改变海洋循环和热传输.
- 纳入热带气旋的影响对于准确的气候预测至关重要.
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