Journal
CHINESE SCIENCE BULLETIN
Volume 50, Issue 18, Pages 2069-2073Publisher
SCIENCE PRESS
DOI: 10.1360/04wd0271
Keywords
North China rainfall in rainy season; the upper-level westerly jet stream over East Asia; interannual variability; SSTs in the equatorial eastern Pacific; convection over the western Pacific
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The rainfall in North China during rainy season (July and August (JA)) exhibits a strong interannual variability. In this study, the atmospheric circulation and SST anomalies associated with the interannual variation of JA North China rainfall are examined. It is found that on the interannual timescale, the JA North China rainfall is associated with significant SST anomalies in the equatorial eastern Pacific, and the North China rainfall and SST anomaly in the equatorial eastern Pacific correspond to the similar variation of the upper-level westerly jet stream over East Asia. A possible mechanism is proposed for the influence of the SST anomalies in the equatorial eastern Pacific on the North China rainfall.
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