Abstract
Based on daily precipitation data, the spatial-temporal features of heavy rainfall events (HREs) during 1960–2009 are investigated. The results indicate that the HREs experienced strong decadal variability in the past 50 years, and the decadal features varied across regions. More HRE days are observed in the 1960s, 1980s, and 1990s over Northeast China (NEC); in the 1960s, 1970s, and 1990s over North China (NC); in the early 1960s, 1980s, and 2000s over the Huaihe River basin (HR); in the 1970s–1990s over the mid-lower reaches of the Yangtze River valley (YR); and in the 1970s and 1990s over South China (SC). These decadal changes of HRE days in eastern China are closely associated with the decadal variations of water content and stratification stability of the local atmosphere. The intensity of HREs in each sub-region is also characterized by strong decadal variability. The HRE intensity and frequency co-vary on the long-term trend, and show consistent variability over NEC, NC, and YR, but inconsistent variability over SC and HR. Further analysis of the relationships between the annual rainfall and HRE frequency as well as intensity indicates that the HRE frequency is the major contributor to the total rainfall variability in eastern China, while the HRE intensity shows only relative weak contribution.
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Supported by the National Science and Technology Support Program of China (2007BAC03A01), Strategic Priority Research Program on Climate Change of the Chinese Academy of Sciences (XDA05090306), National Basic Research and Development (973) Program of China (2012CB955401), and National Natural Science Foundation of China (40905041).
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Chen, H., Sun, J. & Fan, K. Decadal features of heavy rainfall events in eastern China. Acta Meteorol Sin 26, 289–303 (2012). https://doi.org/10.1007/s13351-012-0303-0
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DOI: https://doi.org/10.1007/s13351-012-0303-0