1958—2016年呼伦贝尔草原新巴尔虎右旗气温和降水变化特征
发布时间：2018-08-03 15:52
【摘要】：气候变化是影响草原区植被与环境状况的重要因素。利用呼伦贝尔草原新巴尔虎右旗1958—2016年的气温和降水数据资料,采用线性倾向估计法、累积距平分析法、M-K检验法和Morlet小波分析等方法,从不同时间序列上,对该地区近59年的气候变化趋势、极端气候以及突变现象进行分析。结果表明:年平均气温以0.354℃/10a的速率上升,上升趋势显著;四季平均气温均呈现增温趋势,其中春季增温趋势最大;1985—1986年发生了由低温到高温的突变;研究区年平均气温存在11a的强显著周期。研究区年降水量整体以8.68 mm/10a的速率呈下降趋势,变化趋势不显著;降水集中在夏季(6—8月),占全年降水量的72.9%,7月降水量最大,有效降水日数最多;1961—1962年和1981—1982年降水发生突变;极端降水指标中日最大降水量、连续5d最大降水量、强降水量、极强降水量、强降水比率、连续无雨日数、零降水量日数均呈现递减趋势,仅降水强度呈递增趋势,变化趋势均不显著;Morlet小波分析表明研究区年降水量存在52a的强显著周期。新巴尔虎右旗近59a气候总体呈现干旱化趋势。
[Abstract]:Climate change is an important factor affecting vegetation and environment in grassland. Using the data of air temperature and precipitation from 1958-2016 in Hulunbeir Prairie New Barhu right Banner, using linear tendency estimation method, cumulative anomaly analysis method, M-K test method and Morlet wavelet analysis, from different time series. The trend of climate change, extreme climate and abrupt change in the region were analyzed. The results show that the annual mean temperature increases at the rate of 0.354 鈩，
本文编号：2162226
[Abstract]:Climate change is an important factor affecting vegetation and environment in grassland. Using the data of air temperature and precipitation from 1958-2016 in Hulunbeir Prairie New Barhu right Banner, using linear tendency estimation method, cumulative anomaly analysis method, M-K test method and Morlet wavelet analysis, from different time series. The trend of climate change, extreme climate and abrupt change in the region were analyzed. The results show that the annual mean temperature increases at the rate of 0.354 鈩，
本文编号：2162226
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