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Cloudiness over the Eastern Equatorial Pacific for summer 1983 from geostationary satellite data
Authors:C.-F. Shih  T.H. Vonder Haar  G.G. Campbell
Affiliation:1. Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523, U.S.A.;2. Cooperative Institute for Research in the Atmosphere, Colorado State University, Fort Collins, CO 80523, U.S.A.
Abstract:
The extraordinary El-Nino event of 1982–83 started to fade out in the late spring of 1983. However the sea surface temperature of the Eastern Equatorial Pacific still remained warmer than normal in the following summer. To investigate the characteristics of this late transition phase of the 1982–83 El-Nino, the GOES-West satellite data of July and August of 1983 are analyzed. The outgoing longwave radiation field and the distribution of cloudiness, which was derived by using a new threshold technique, are obtained. The longwave radiation field is compared to monthly average climatic indices commonly used at the Climatic Analysis Center. The results of cloud analysis showed some interesting features during the decaying phase of the 1982–83 El-Nino. The diurnal variation of cloudiness indicates that total cloud amounts decrease from 8 GMT to 20 GMT over most of the area. This overall study demonstrates preliminary results of the International Satellite Cloud Climatology Project of the World Climate Research Program.
Keywords:
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