Study on the relationship between the lake area variations of Qinghai-Tibetan Plateau and the corresponding climate change in their basins

35th International Symposium on Remote Sensing of Environment

地球科学;生态环境科学

Guozhuang, Shen^1 ; Jingjuan, Liao^1 ; Huadong, Guo^1 ; Yingkui, Li^2

Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, China No.9 Dengzhuang South Road Haidian District, Beijing, 100094, China^1

University of Tennessee, United States^2

关键词: Climate condition;    Environment systems;    Global climate changes;    Mean temperature;    Multivariate statistical analysis;    Qinghai-Tibetan plateau;    Saturation vapour pressures;    Spatial analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/17/1/012144/pdf
DOI  :  10.1088/1755-1315/17/1/012144

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Qinghai-Tibetan Plateau is the largest lake area in China, with a total area of existing lakes of 36,900km2, accounting for 52% of the total lake area of China. Lakes on the Tibetan Plateau play critical roles in the water cycle and ecological and environment systems of the Plateau. The global trend of warming up is increasing obviously, which has led to major changes in the climate conditions in China, even in the world. Whereas, when they analyse the relationship they just use the weather station's recording data, without any spatial analysis of the climate data. Here, we will do some researches on the relationship between the 10 selected lakes' area variation and the corresponding climate change in their drainage basin and discuss how the lakes changes in recent 40 years using the climate data processed using the spatial kriging. Thus, the drainage area can be taken into account and a real relationship can be pointed out. In order to study the relationship, Landsat MSS data, Landsat TM, Landsat ETM images, the topographic map have been collected to extract the variation of lake area. The 131 weather stations climate data, including precipitation, temperature, sun shine duration, evaporation are chosen to study the relationship. After extraction of the area of the lakes, a multivariate statistical analysis method was used to test the relationship between the area of the lakes and the global climate change, including the change of the temperature, the precipitation, and other factors. The variation of lakes in Qinghai-Tibetan Plateau is related to the mean temperature, the precipitation and saturation vapour pressure. But the frozen soil may affect the lake area variation to some extent.