1970-2020年陈巴尔虎旗气候季节特征浅析

Analysis on Climatic Seasonal Characteristics of Chenbaer Tiger Banner from 1970 to 2020

利用陈巴尔虎旗1981-2020年的气温观测数据,以气候学标准划分四季,得出陈巴尔虎旗四季的常年起始日期和四季季长的常年值,获得陈巴尔虎旗各区域四季季长分布特征。利用陈巴尔虎旗1970-2020年的日平均气温统计,分析得出陈巴尔虎旗51年的四季季长,以Mann-Kendall突变方法证明了陈巴尔虎旗四季季长的突变事实。结果表明:(1)陈巴尔虎旗春季、秋季季长呈现经向分布,夏季、冬季季长呈现纬向分布,该分布特征与植被覆盖类型等地形因素有关。(2)陈巴尔虎旗春季季长、秋季季长有减少的变化趋势。陈巴尔虎旗夏季季长自20世纪70年代中期开始增加,自80年代初期这种变化趋势更加显著。陈巴尔虎旗冬季季长以90年代前期为节点,呈现先增加后减少的趋势。

Based on the temperature observation data from 1981 to 2020 in Chenbaer Tiger Banner, the four seasons were divided according to the climatological standard,and the starting date of the four seasons and the annual values of the four seasons were obtained, and the distribution characteristics of the four seasons in each region of Chenbaer Tiger Banner were obtained. Based on the statistics of daily mean temperature in Chenbaer Tiger Banner from 1970 to 2020, the seasonal length of Chenbaer Tiger Banner for 51 years was analyzed, and the mutation fact of seasonal length of Chenbaer Tiger Banner was proved by mann-Kendall mutation method.The results showed that :(1) the seasonal length of chenbaerhu banner presented a meridional distribution in spring and autumn, and a latitudinal distribution in summer and winter,which was related to topographic factors such as vegetation cover type.(2) The seasonal length of Chenbaer Tiger flag in spring and autumn had a decreasing trend. The summer season length of Chenbaer Tiger Banner began to increase since the middle of 1970s,and this trend was more significant since the early 1980s. The winter season length of Chenbaer Tiger Banner increased first and then decreased in the early 1990s.