生态学报2017，Vol.37Issue(21)：7098-7113,16.DOI:10.5846/stxb201609091830
1961-2014年中国沿海极端气温事件变化及区域差异分析
Analysis of spatiotemporal variations and regional differences in extreme temperature events in the coastal area of China during 1961-2014
摘要
Abstract
Based on the daily temperature dataset of 156 weather station records,a set of statistical methods,including trend analysis,Wavelet analysis,Mann-Kendall test,accumulative anomaly analysis,Pettitt test,and principal component analysis was employed to investigate the spatial and temporal variations of the extreme temperature events from 1961 to 2014 in the coastal area of China.Results of the trend analysis demonstrated an upward trend in warm extremes and a downward trend in cold extremes as well as diurnal temperature range (DTR).The decadal trend rates of the night extremes were obviously higher than those of the day extremes in the coastal area of China.Generally,a decrease was observed in the multi-year averages of the frost days (FD0),ice days (ID0) and diurnal temperature range (DTR),and an increase was observed in the mutil-year averages of the summer days (SU25),tropical nights (TR20),minimum value of daily maximum temperature (TNx),minimum value of daily minimum temperature (TNn) and growing season length (GSL)from north to south.However,a little variation was observed in the multi-year averages of the cool days (TX10p),cool nights (TN10p),warm days (TX90p),warm nights (TN90p),maximum value of daily maximum temperature (TXx),maximum value of daily minimum temperature (TNx),cold spell duration index (CSDI) and warm spell duration index (WSDI) between the sub-regions and the entire coastal area of China.The primary period of extreme temperature indices varied from 2 to 8 years in the sub-regions of the coastal area of China,and no significant decadal period was detected.The mutation time of extreme temperature indices occurred mainly in the 1980s and the 1990s in all sub-regions.Additionally,the cold extremes and minimum values of daily maximum (minimum) temperature mutated earlier than those of the warm extremes and maximum values of daily maximum (minimum) temperature.After mutation,the extreme warm events and extreme value events tended to occur frequently,whereas the occurrence of extreme cold events decreased gradually.The extreme temperature indices holding high load in the first principal component showed strong positive correlations with each other and exhibited high contributions to the daily average and daily maximum (minimum) temperature.On the other hand,the extreme temperature indices holding low load in the first principal component presented weak correlations with other extreme indices and showed low contributions to the daily average and daily maximum (minimum) temperature.关键词
极端气温/时空变化/区域差异/中国沿海Key words
extreme temperature/spatial-temporal variation/regional difference/coastal area of China引用本文复制引用
王晓利,侯西勇..1961-2014年中国沿海极端气温事件变化及区域差异分析[J].生态学报,2017,37(21):7098-7113,16.基金项目
国家自然科学基金Belmont论坛国际合作项目(NSFC-BF/IGFA,31461143032) （NSFC-BF/IGFA,31461143032）
中国科学院战略性先导科技专项(XDA11020205) （XDA11020205）
