TROPICAL GEOGRAPHY ›› 2016, Vol. 36 ›› Issue (4): 692-699.doi: 10.13284/j.cnki.rddl.002864

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Variation Characteristics and Spatial Differences of Extremely High Temperature Days over South China during the Recent 53 Years

CHEN Ying,ZHANG Ling,QIAN Huaisui   

  1. (School of Geographical Science,Guangzhou University,Guangzhou 510006,China)
  • Received:2015-11-11 Online:2016-07-05 Published:2016-07-05

Abstract: Based on the daily maximum temperature data from 56 meteorological stations over South China during 1961-2013, spatial differences of extremely high temperature days over South China were studied by ways of Percentiles, linear trend, Mann-Kendall test and Wavelet analysis. The results show that: 1) Most stations showed a significant increasing trend, especially in coastal areas, the majority entered a rapidly increasing period in the late 1990s, the spatial characteristics revealed a decreasing trend from southeastern to northwestern over South China. 2) Each station experienced a mutation according to Mann-Kendall test, in the 1960s and 1990s most stations showed a significant decreasing and increasing period, respectively, at the 5% level. 3) The first main period of 26 a and 22~28 a existed in average year and each station, respectively, the decreasing and increasing mutations in the period from the mid-late 1960s to the 1970s and in the 2000s or so respectively existed in the multiple oscillation periods, and the main cause of abrupt climate change was the phase superposition of multi-scale oscillation. Spatial differences were closely related to the location of land and sea and terrain according to Mann-Kendall test and Morlet analysis.

Key words: extremely high temperature days, variation characteristics, spatial differences, South China