Title: Interdecadal and Interannual Variation Characteristics of Precipitation in North China and its Relation with the Northern Hemisphere Atmospheric Circulations
Abstract: With data of monthly precipitation of 26 stations in North China and American NCAR/NCEP monthly reanalysis atmosphere variables, by the method of Singular Value Decomposition (SVD), we have investigated the variation features of precipitation in North China at interdecadal and interannual time scales, and its relation with the atmospheric circulations in the Northern Hemisphere. The results show that it is necessary to do time scale separations to precipitation and atmosphere variables, otherwise, the outcomes of SVD reflect only the characteristics of interannual time scale but not the interdecadal time scale. Corresponding to interdecadal and interannual time scales of precipitation in North China, there exist significant differences in the anomalies of atmospheric circulations. Connecting with the remarkable interdecadal shift of precipitation occurring in the late 1970s in North China, all the atmospheric circulations have the same shift as well, together with a propagation process from ground to the upper troposphere.
Publication Year: 2005
Publication Date: 2005-05-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 20
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