TEMPORAL AND SPATIAL DISTRIBUTION CHARACTERISTICS OF ATMOSPHERIC PRECIPITATION IN THE EASTERN QAIDAM BASIN AND ITS IMPACT ON GRASS GROWTH
Based on monthly water vapor pressure data from six meteorological observation stations in the eastern Qaidam Basin from 1981 to 2022,this article analyzes and studies the spatiotemporal distribution of atmospheric precipitation in the eastern Qaidam Basin through methods such as linear regression,moving average,and interpolation,and explores the impact of atmospheric precipitation on grass growth.The results indicate that the annual atmospheric precipitation in the eastern part of the Qaidam Basin ranges from 0.56 to 0.79 cm,with a climate inclination rate of 0.02 cm/10a,showing a slow increasing trend.In terms of spatial distribution,it exhibits a distribution characteristic of first increasing and then decreasing from northeast to southwest;The climate tendency rate of atmospheric precipitation in Delingha is 0.01 cm/10 a,while that in Tianjun,Dulan,and Wulan is 0.02 cm/10 Wa.The maximum atmospheric precipitation occurred in 2018,and the minimum occurred in 1984.From the 5a sliding average,the four counties(cities)in the eastern part of the Qaidam Basin show two peak changing trends;The monthly variation of atmospheric precipitation shows a unimodal curve distribution over time;The climate tendency of atmospheric precipitation in different seasons is highest in summer and second in autumn;The atmospheric precipitation in the eastern part of the Qaidam Basin shows a trend of increasing first and then decreasing from northeast to southwest in spring,summer,and autumn,and gradually increasing from east to west in winter.From 2005 to 2020,the grass yield in Tianjun increased at a rate of 6.0 g/m2 per year.The atmospheric precipitation is negatively correlated with the greening and flowering periods of grass,and significantly positively correlated with the yellowing and withering periods and grass yield.
万方数据
维普
