1960—2019年河西地区风蚀气候侵蚀力时空演变及其影响因素分析  

Temporal-spatial distribution characteristics in wind erosion climatic erosivity and its influencing factors in Hexi Area from 1960 to 2019

作　　者：张克新 赵莉 彭娇婷[1] 纪燕 罗佳佳 Zhang Kexin;Zhao Li;Peng Jiaoting;Ji Yan;Luo Jiajia(School of Management Science and Engineering,Guizhou University of Finance and Economics,Guiyang 550025,Guizhou,China;Research Office,Guizhou University of Finance and Economics,Guiyang 550025,Guizhou,China)

机构地区：[1]贵州财经大学管理科学与工程学院,贵州贵阳550025 [2]贵州财经大学科研处,贵州贵阳550025

出　　处：《地理科学》2023年第12期2240-2246,共7页Scientia Geographica Sinica

基　　金：国家自然科学基金项目(42163001);贵州省科技计划项目(黔科合基础-zk[2021]一般189);贵州财经大学2022年度校级科研项目(2022KYJC002)资助。

摘　　要：基于河西地区14个气象站点1960—2019年逐月气象观测资料,利用联合国粮农组织(FAO)推荐的公式计算河西地区风蚀气候因子指数值(C值),对河西地区气候侵蚀力的时空演变特征及其影响因素进行分析。结果表明:①在整个研究时段内,河西地区C值的年际变化呈现出波动下降趋势,下降速率为4.03/10a,年C值呈现出上升−下降−略微上升的状态;该地区季节C值呈现出秋季开始逐渐变大、次年春季达到最大、到夏季又迅速减小的变化特征。②河西地区多年平均C值范围8.7~132.9,整体呈现出从东南向西北增加的特点;研究区C值最大值位于西北部的马鬃山,中部地区C值相对较小,最小值出现在研究区东部的武威。③Mann-Kendall(M-K)突变检验结果表明,该地区年C值在1984年发生突变,而春、夏、秋、冬四季C值发生突变的年份分别为1983年、1984年、1987年和1988年;突变前和突变后C值差异明显;④河西地区气候因子对C值的影响程度表现为平均风速>降水量>相对湿度>平均气温,其中风速是首要驱动因子。Based meteorological data from 14 weather stations in Hexi Area during 1960—2019,the wind erosion climatic factor index was calculated using function given by the UN Food and Agriculture Organization and the basic features of wind erosion climatic erosivity were analyzed.The results showed that the wind erosion climatic factor indexes were in range of 8.7-132.9 and the average value was 36.6.The annual average C values obviously decreased at the rate of approximately 4.03/10a(α=0.001)in Hexi Area during 1960—2019.On the spatial,the C values increase from the southeast to the northwest.The C values can reach to 132.9 in the west and reduced to about 8.7 in the eastern part of Wuwei City.The C values has a significant seasonal variation.The largest value is in spring with the value of 14.8 and the second large value in winter with the value of 10.Summer shows very small value.Abrupt change was found in the long-term climate variation.The Mann-Kendall abrupt change test showed that the year of 1984 can be viewed as turning point of the abrupt change on an annual C value.While from the perspective of seasonal C values,the abrupt change points in spring and summer appeared slightly earlier than those in autumn and winter.The abrupt change of the average C values happened in 1983 and 1984 in spring and summer while that of autumn appeared in 1987.The abrupt change of winter happened in 1988.Wind speed was the decisive factor of the C values in Hexi Area.

关 键 词：风蚀气候侵蚀力 风蚀气候因子指数 河西地区 

分 类 号：F129.9[经济管理—世界经济]