首页|Monitoring Multi-Temporal Changes of Lakes on the Tibetan Plateau Using Multi-Source Remote Sensing Data from 1992 to 2019:A Case Study of Lake Zhari Namco
Monitoring Multi-Temporal Changes of Lakes on the Tibetan Plateau Using Multi-Source Remote Sensing Data from 1992 to 2019:A Case Study of Lake Zhari Namco
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Lake level,area and volume are sensitive indicators of climate change.At present,many studies have focused on the interannual water balance of lakes,but lake level and area can change re-markably with seasons,especially for lakes with seasonal ice cover.Zhari Namco,a seasonal frozen lake,was selected as an example to investigate its seasonal water balance.Multi-source altimetry and Landsat data were used to obtain the seasonal lake level and area from 1992 to 2019,and seasonal lake volume variations were also estimated.The results indicated the average lake level,area and volume in autumn were the largest.The lake level,area,and volume experienced three turning points approxi-mately in 2000,2010,and 2016,and showed an overall increasing trend from 1992 to 2019,with slopes of 0.15 m/year,2.17 km2/year,and 0.14 km3/year,respectively.The lake area expanded significantly in autumn,which was related to the abundant precipitation.Delay time of land surface runoff,increased temperature,and evaporation may be the reason for the low lake level and volume in summer.The pre-cipitation was the dominant factor of water balance,which explained 62.09% ,62.43% ,and 62.10% of the variations in lake level,area,and volume,respectively.
lake levellake arealake volumesatellite altimetrylandsatZhari Namcohydrogeology
Juan Wu、Chang-Qing Ke、Yu Cai、Zheng Duan
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Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology,Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural Resources,School of Geography and Ocean Science,Nanjing University,Nanjing 210023,China
Collaborative Innovation Center of Novel Software Technology and Industrialization,Nanjing 210023,China
Guangxi Water and Power Design Institute Co.,Ltd,Nanning 530022,China
Collaborative Innovation Center of South China Sea Studies,Nanjing 210023,China
Department of Physical Geography and Ecosystem Science,Lund University,Lund 22362,Sweden
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Joint China-Sweden Mobility grant jointly funded by the National Natural Science Foundation of ChinaJoint China-Sweden Mobility grant jointly funded by the National Natural Science Foundation of ChinaJoint China-Sweden Mobility grant jointly funded by the National Natural Science Foundation of ChinaSwedish Foundation for International Cooperation in Research and Higher Education
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