应用生态学报2017，Vol.28Issue(6)：1769-1778,10.DOI:10.13287/j.1001-9332.201706.002
1960-2014年松嫩草地极端气候事件的时空变化
Temporal and spatial variations of extreme climatic events in Songnen Grassland, Northeast China during 1960-2014
摘要
Abstract
Fourteen extreme climatic indices related with main regional meteorological disasters and vegetation growth were calculated based on daily data from 13 meteorological stations during 1960-2014 in Songnen Grassland,Northeast China.Then,the variation trend and the spatial and temporal patterns of climatic extreme events were analyzed by using regression analysis,break trend analysis,Mann-Kendall test,Sen' s slope estimator and moving t-test method.The results indicated that summer days (SU25),warm days (TX90P),warm nights (TN90P) and warm spell duration (WSDI) representing extremely high temperatures showed significant increasing trends (P＜0.05).Meanwhile,frost days (FD0),cold days (TX10P),cold nights (TN10P) and cold spell duration indicator (CSDI) representing extremely low temperatures showed obviously decreasing trends.The magnitudes of changes in cold indices (FD0,TX10P,TN10P and CSDI) were clearly greater than those of warm indices (SU25,TX90P,TN90P and WSDI),and that changes in night indices were larger than those of day indices.Regional climate warming trend was obvious from 1970 to 2009,and the most occurrences of the abrupt changes in these indices were identified in this period.The extreme precipitation indices did not show obvious trend,in general,SDⅡ and CDD experienced a slightly decreasing trend while RX5D,R95P,PRCPTOT and CWD witnessed a mildly increasing trend.It may be concluded that regional climate changed towards warming and slightly wetting in Songnen Grassland.The most sensitive region for extreme temperature was distributed in the south and north region.Additionally,the extreme temperature indices showed clearly spatial difference between the south and the north.As for the spatial variations of extreme precipitation indices,the climate could be characterized by becoming wetter in northern region,and getting drier in southern region,especially in southwestern region with a high drought risk.关键词
极端气候事件/气候变化/间断趋势分析/时空变化/松嫩草地Key words
extreme climatic events/climate change/break trend analysis/temporal and spatial variations/Songnen Grassland引用本文复制引用
马齐云,张继权,来全,张峰,董振华,阿鲁思..1960-2014年松嫩草地极端气候事件的时空变化[J].应用生态学报,2017,28(6):1769-1778,10.基金项目
本文由“十二五”国家科技支撑计划项目(2013BAK05B02)、中央高校基本科研业务费专项(2412016KJ046)、国家气候中心项目(2015001)和国家自然科学基金项目(41571491)资助 This work was supported by the National Key Technology R&D Program during the 12th Five-Year Plan Period (2013BAK05B02),the Research Funds for the Central Universities(2412016KJ046),the National Climate Center Project(2015001) and the National Natural Science Foundation of China (41571491). （2013BAK05B02）
