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Remote sensing-based dynamic monitoring and environmental change of wetlands in southern mongolian plateau in 2000‒2018

引用

China Geology 2021年第2期4卷 353-363页

作者： Wen-hui Jie Chun-lei Xiao Ce Zhang En Zhang Jing-yue Li Bing Wang Hai-wei Niu Shuang-fa Dong Airborne Survey and Remote Sensing Center of Nuclear Industry Shijiazhuang 050002China Hebei Key Laboratory of Airborne Survey and Remote Sensing Technology Shijiazhuang 050002China China Aero Geophysical Survey and Remote Sensing Center for Natural Resources China Geological SurveyBeijing 100083China

The environmental change in the wetlands in the southern mongolian plateau has important impacts on the environment of North China and even the entire Northeast Asia,from which the global climate change can be understood on a large scale,especially the climate change in the mongolian *** study extracted the information on the wetlands from three stages of remote sensing images(also referred to as RS images)of the study area,including Enhanced Thematic Mapper Plus(ETM+)images of 2000,TM images of 2010,and Landsat 8 Operational Land Imager(OLI)images of *** indicated by the extraction results,the area of wetlands decreased from 796.90 km^(2) of 2000 to 666.24 km^(2) of 2018 at a rate of 7.26 km^(2)/*** reduced area is 130.66 km^(2),which is about 16.4%*** the patch number of wetlands decreased from 731 of 2000 to 316 of 2018 in the study area,approximately 56.8%reduction(415 patches),and the decrease in the area of the wetlands mainly occurred in the northwest endorheic *** terms of wetland types,the change of the wetlands was dominated by the decrease of lacustrine wetlands,of which the area and patch number decreased by 106.2 km^(2) and 242,***,the area of the lacustrine wetlands decreased at the highest rate of 8.70 km^(2)/a in 2010‒*** the perspective of spatial distribution,the wetlands in the western part shrunk more notably than those in the eastern part as a whole in the study *** to local meteorological data,the precipitation gently decreased and the temperature increased(about 1.7℃)from ***,the decrease in the area of the wetlands and the temperature rises in the study area were mainly driven by the mongolian monsoon climate,reduction in precipitation,and human activities.

关键词： Wetlands Environmental change Global climate change Remote sensing Dynamic monitoring southern mongolian plateau

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