Evaluation of International Satellite Cloud Climatology Project (ISCCP) D2 cloud amount changes and their connections to large-scale dynamics
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The International Satellite Cloud Climatology Project (ISCCP) D2 dataset exhibits a 2.6% per decade decrease in the global all-cloud cloud amount from July 1983 through September 2001. This result is consistent with other recent findings that provide evidence that the cloud amount has decreased on a decadal-scale. Such changes in cloud amount should have an obvious impact on the climate system through changes in heating and the radiation budget of the atmosphere. However, the changes evident in the ISCCP data seem too large to be accepted without question. Because these data are used as a ...