ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 33 Issue 10 > 2007,33(10):88-95. DOI:10.7519/j.issn.1000-0526.2007.10.013 Prev Next
The Interdecadal Mode of the Summer Monsoon Rainfall in East Asia and Its Association with Pacific Decadal Oscillation
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Abstract:
The interdecadal variation of summer monsoon rainfall in East Asia and its rel ationship with Pacific Decadal Oscillation (PDO) are investigated by using month ly precipitation reconstruction over global land, the monthly sea surface temper ature anomaly (SSTA) of Hadley Center for Climate Prediction and Research, and t he National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis dataset. It is revealed that both the interde cadal mode of the summer monsoon rainfall in East Asia and PDO occurred apparent interdecadal shift around 1976. Moreover, there exists close relation b etween summer monsoon rainfall and PDO on interdecadal time scale. PDO can gen erate anomalous atmospheric circulation in the lowlevel troposphere, which is homologous with the interdecadal variability of summer monsoon circulation in East Asia. It suggests that the external forcing of PDO in lower troposphere pos sibly exerts influences on the interdecadal variability of the East Asia summe r monsoon circulation, and finally leads to the interdecadal variability of th e summer monsoon rainfall in East Asia.
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