| 我国蒙新地区近40年来湖泊动态变化与气候耦合 |
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| 关键词:Inner Mongolia Xinjiang lake remote sensing climate |
| 基金项目:国土资源部公益性科研专项(编号: 201011001)；国家自然科学重点基金项目(编号: 40531002)和中国地质调查局地质调查项目(编号: 1212011120046; 1212010511901) |
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| 摘要: |
| Dynamic Changes of Lakes in Inner Mongolia–Xinjiang Region and the Climate Interaction in the Past Forty Years |
| Lake change, as a mirror of climate change, has sensitive responses to climate change. The authors extracted information of all lakes in Inner Mongolia and Xinjiang from Landsat of the 1970’s, the 1990’s, around 2000 and 2010 based on RS and GIS and developed the spatial database of lakes. On the one hand, through a statistic analysis of lake spatial data using ArcGIS, the authors detected the dynamic changes of lakes in Inner Mongolia and Xinjiang from the 1970’s to 2010 or so in the light of time and space. On the other hand, some representative lakes whose area is larger than 5 km2 were selected to analyze the dynamic changes one by one, and division of these lakes into expansion area and atrophy area was made according to the dynamic changes. From the 1970’s to the 1990’s, lakes in south Inner Mongolia and west Xinjiang were shrunk whereas lakes in other places of the study region tended to expand. From the 1990’s to 2000, lakes in south Inner Mongolia were shrunk whereas lakes in north Inner Mongolia and Xinjiang were expanded. From 2000 to 2010, lakes in east Inner Mongolia and west Xinjiang were shrunk whereas other lakes were expanded. Under the background of the global climate warming, the authors analyzed annual mean temperature, annual rainfall and annual evaporation data of forty meteorological stations, and reached some conclusions based on the data obtained: in the past forty years, annual mean temperature in Inner Mongolia and Xinjiang kept rising; annual rainfall in Inner Mongolia had kept growing before 2000 but decreased suddenly after 2000, and annual rainfall in most part of Xinjiang tended to increase; annual evaporation in Inner Mongolia and Xinjiang tended to decrease. Dynamic changes of lakes in Inner Mongolia–Xinjiang region were consistent with the variation tendency of climate. With the Boston Lake of Xinjiang as an example, the authors finally analyzed the factors responsible for the lake changes, i.e., climatic environment and human activity. |
| YAN Li-juan,ZHENG Mian-ping.2014.Dynamic Changes of Lakes in Inner Mongolia–Xinjiang Region and the Climate Interaction in the Past Forty Years[J].Acta Geoscientica Sinica,35(4):463-472. |
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