Absorption feedback in stratocumulus clouds Influence on cloud top albedo
Absorption feedback in stratocumulus clouds Influence on cloud top albedo
复制标题
层积云吸收反馈对云顶反照率的影响
DOI：
10.3402/tellusa.v46i3.15476
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发表时间：
1994
期刊：
影响因子：
2
通讯作者：
R. Mitchell
中科院分区：
文献类型：
--
作者：
R. Boers;R. Mitchell
本文提出了一种反馈机制，修正了云凝结核（CCN）浓度增加对云顶反照率的增强预期。这一机制是基于云对太阳辐射吸收变化保持自身稳定的热力学趋势。对于光学薄云，这种吸收反馈导致预期反照率增强的减少，而对于光学厚云，预测反照率增强的放大。讨论了由于CCN变化而引起的这种效应对气候辐射强迫的可能影响，从而讨论了云顶反照率的变化。DOI: 10.1034 / j.1600-0870.1994.00001.x
This paper proposes a feedback mechanism which modifies the enhancement of cloud top albedo expected from an increased concentration of cloud condensation nuclei (CCN). The mechanism is based on the thermodynamic tendency of the cloud to stabilize itself against changes in the absorption of solar radiation. For optically thin clouds, this absorption feedback leads to a reduction in the anticipated albedo enhancement, while for optically thick clouds, an amplification of the albedo enhancement is predicted. The likely impact of this effect on the radiative forcing of climate due to changes in CCN and hence cloud top albedo is discussed. DOI: 10.1034/j.1600-0870.1994.00001.x