Abstract
The East Asian summer monsoon (EASM) underwent an interdecadal variation with interannual varia-tions during the period from 1958 to 1997, its index tended to decline from a higher stage in the mid-1960’s until it reached a lower stage after 1980’s . Correlation analysis reveals that EASM is closely related with the global atmospheric circulation and sea surface temperature (SST). The differences between the weak and strong stage of EASM shows that, the summer monsoon circulation over East Asia and North Africa is sharply weakened, in the meantime, the westerlies in high latitudes and the trade-wind over the tropical ocean are also changed significantly. Over the most regions south of the northern subtropics, both air tem-perature in the lower troposphere and SST tended to rise compared with the strong stage of EASM. It is also revealed that the ocean-atmosphere interaction over the western Pacific and Indian Ocean plays a key role in interannual to interdecadal variation of EASM, most probably, the subtropical Indian Ocean is more im-portant. On the other hand, the ENSO event is less related to EASM at least during the concerned period.
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Supported by the CAS Key Project (KZCX2-203), the NSFC Project (No. 49735160 and No. 40075020) and IAP Innovation Fund (No. 8-1307).
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Feng, X. Interannual to interdecadal variation of east asian summer monsoon and its association with the global atmospheric circulation and sea surface temperature. Adv. Atmos. Sci. 18, 567–575 (2001). https://doi.org/10.1007/s00376-001-0045-x
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DOI: https://doi.org/10.1007/s00376-001-0045-x