摘要
利用地面4个测站常规气象资料及中巴地球资源卫星、美国陆地卫星资料,分析了那曲中东部地区湖泊流域近45年各气候要素的变化对20世纪80年代以来湖泊面积变化的影响。在此基础上,建立了湖泊面积的拟合方程。结果表明:湖泊流域的降水量、气温以及地面温度近年来呈上升趋势,而蒸发量、日照时数、最大积雪深度、最大冻土深度逐渐下降。这些要素变化与湖泊面积的增加具有显著的线性关系,根据这些气象要素的累积值建立的回归方程能较好地拟合湖泊面积的变化。
Using the conventional meteorological observation at Naqu station etc from 1960 to 2004,along with the dataset of China-Brazil earth resource satellite and US land satellite,the climate changes of some lake regions in the middle-and eastern-Naqu areas in the recent 45 years and effect of climate changes on lake acreage since 1980′s were analyzed.On the basis of above,the fitting equation for lake acreage was estabilished through the corresponding relationship between climatic factors and lake acreage.The results show that the precipitation,air temperature and surface temperature in the lake drainage area have been increased in the recent years,but the evaporation,sunshine duration,maximum depth of snow,maximum depth of frozen soil appear to gradually decrease trend.These factor variations have obvious linear relation with the increasing of lake acreage.The estabilishing regression equation based on climatic factors could well fit the variation of lake acreage.
出处
《高原气象》
CSCD
北大核心
2007年第3期485-490,共6页
Plateau Meteorology
基金
成都高原气象研究所开放实验室基金课题
西藏自治区科技厅项目共同资助
关键词
那曲地区
湖泊流域
气候变化
拟合方程
Naqu region
Lake drainage area
Climate change
Fitting equation
