温暖的游泳池热预算和短波云强迫:一个缺失的物理学?
概括
西太平洋温暖泳池上的云层通过反射和捕捉热量,显著减少了海面太阳辐射. 这一发现对气候产生了重大影响,挑战了现有的海洋热传输模型.
科学领域:
- 海洋学 海洋学 海洋学
- 大气科学 大气科学
- 气候科学 气候科学
背景情况:
- 船舶观测和海洋模型显示,西太平洋温暖池的混合层 (<20 W/m2) 产生的热量出口极小.
- 了解云的辐射效应对于准确的气候建模至关重要.
研究的目的:
- 为了推断云对净太阳辐射在西太平洋温暖池的海面上的影响.
- 为了研究推断和观察到的短波云强迫之间的差异.
主要方法:
- 利用船舶观测和海洋模型数据进行热出口计算.
- 根据海面能量平衡推断的短波云强迫.
主要成果:
- 推断的短波云强迫是相当大的 (~-100 W/m2),是大气顶部观测值的1.5倍.
- 云层似乎通过反射和显著的大气吸收减少了海面太阳辐射.
结论:
- 在温水池上的云辐射特性与典型的模型假设不同.
- 过度的云层吸收对海洋热量从热带转移到热带以外的热带有重大影响.
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