Temporal and spatial analysis of extreme climatic events in Shanxi Province from 1961 to 2013
Based on daily data for temperature and precipitation from 18 meteorological stations in Shanxi,China from 1961 to 2013 and extreme events define methods and Mann-Kendall Jump tests,16 indexes that characterize the frequency and probability of extreme climatic events were calculated using RclimDex(1.0).The trends and spatial patterns of extreme climatic events across this region were obtained.The results indicate that the frequency and duration of extreme temperature events increased since the 1990s in comparison with smooth trends from the 1960s to the late 1980s.Frost day(FD0),the percentile value of cold night(TN10P),the percentile value of cold day (TX1OP)and the duration of coldness (CSDI)characterizing extremely low temperatures presented downward trends;meanwhile,summer day (SU25),crop growth period (GSL),the percentile value of warm night,the percentile value of warm day (TX9OP)and the duration of warmness (WSDI)characterizing extremely high temperatures showed upward trends.Extreme precipitation indexes,except SDII and CDD,showed downward trends during the past 53 years.Precipitation in the study area decreased slightly while the intensity of precipitation and continued dry index increased.Extreme precipitation index characterizing the frequency and intensity of heavy precipitation has had obvious change since the 1970s,while the extreme temperature events have undergone a sharp jump since the 1990s.Additionally,extreme temperature and precipitation indices show clear spatial distributions decreasing from south to north.Cold and warm series indices showed that the highest value lies in southern Shanxi;heavy precipitation events increased recently.
climate changeextreme temperatureextreme precipitationsharp changetemporal and spatial characteristicsShanxi Province
NETL
NSTL
万方数据
维普
