ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Relationships Between ENSO and QinghaiTibetan Plateau Snow Depth and Their Influences on Summer Rainfall Anomalies in China
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Abstract:
Based on the sea surface temperature (SST) in Ni〖AKn~D〗o3 region and snow depth from 1979 to 2005, relationships between ENSO and QinghaiTibetan Plateau (QXP) snow depth and their influences on summer rainfall in China were investigated, respectively. In addition, the joint influence of ENSO and QXP snow on summer rainfall in China was also analyzed. The results showed that the summer rainbelt in eastern China often moved southward (northward) only when a strong warm (strong cold) ENSO event and a heavy (light) QXP snow occurred simultaneously during previous winter and spring. Moreover, the monthly Ni〖AKn~D〗o3 SST and QXP snow during previous winter and spring both had a positive correlation with the June rainfall over southward of the Yangtze River, while they both had a negative correlation with August rainfall over southward of the Yangtze River. Furthermore, the monthly Ni〖AKn~D〗o3 SST during previous spring and the QXP snow during previous winter and spring both had a positive correlation with the July rainfall over southward of the Yangtze River. Moreover, the Ni〖AKn~D〗o3 SST and QXP snow during spring had a more important impact on June and July rainfall anomalies over southward of the Yangtze River. It clearly indicated that the impacts of previous ENSO and QXP snow on monthly rainfall anomalies over southward of the Yangtze River are different for each summer month.
Keywords:
winter and spring snow depth， QinghaiTibetan Plateau (QXP)， ENSO， summer rainfall, SST (sea surface temperature)
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