Estimation of the radiation budget sensitivity to cloud variations |
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| Institution: | 1. Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, USA;2. Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO, USA;3. Environmental and Climate Sciences Department, Brookhaven National Laboratory, Upton, NY, USA;1. College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing, China;2. State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences (CAS), Beijing, China;3. College of Earth and Planetary Science, University of Chinese Academy of Sciences, Beijing, China |
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| Abstract: | At the estimation of the sensitivity three variable parameters must be taken into account: cloud amount, cloud albedo and cloud-top height. Cloud albedo is considered to be a parameter that varies according to a given formula. The effective cloud amount and outgoing longwave flux from cloudy atmosphere have been computed on the basis of the satellite measured planetary albedo and the outgoing flux data, using additional information about planetary albedo and the outgoing longwave flux in clear-sky conditions. The latter quantities have been computed from the mean contemporary climatic data. The estimation of the sensitivity is carried out in two cases: if the effective cloud amount and cloud-top height variations are independent or not. The corresponding statistical tests are presented. |
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