Abstract
Based on the property of entropy, a new index Q was defined to measure the temporal concentration property of summertime daily rainfall in China, based on daily precipitation data collected at 553 observation stations in China during 1961–2010. Furthermore, changes in the temporal concentration property of summer precipitation in China were investigated. The results indicate that the regions with larger Q values were located in most parts of Northwest China and the north of the Yellow River, where daily precipitation tended to become temporally concentrated during the study period. On the contrary, smaller Q values were found in eastern Tibetan Plateau, southeastern Northwest China, and most parts of Southwest and South China. The most obvious increasing trend of Q index was found in South China and most parts of Southwest China, where precipitation showed a temporal concentration trend. However, a decreasing trend of Q index was found in Northwest China, the Tibetan Plateau, and the north of the Huaihe River. Variations of the Q index and the summer rainfall total during 1961–2010 in China both exhibited an increasing trend, implying larger temporal variability in rainfall attributes. It is illustrated that the summer precipitation in general became more temporally concentrated with more intense rainfall events and wetter days.
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Supported by the National Natural Science Foundation of China (41575094 and 41275092), Project for Postgraduate Scientific Research and Innovation of Jiangsu Province (KYLX_0842 and CXZZ12-0485), and Innovation Program of the State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences (2015LASW-A03).
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Li, H., Zhai, P., Lu, E. et al. Changes in temporal concentration property of summer precipitation in China during 1961–2010 based on a new index. J Meteorol Res 31, 336–349 (2017). https://doi.org/10.1007/s13351-017-6020-y
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DOI: https://doi.org/10.1007/s13351-017-6020-y