1970-2009年纳木错湖泊面积扩张的遥感卫星观测证据及原因之商榷

doi:10.7522/j.issn.1000-0240.2012.0011

摘要/Abstract

摘要： 基于不同时期的遥感影像、航测地形图和DEM, 运用GIS和RS技术对纳木错1970-2009年间湖泊面积变化进行了分析, 利用周边气象台站资料, 通过对纳木错湖面蒸发及降水、冰川融水、非冰川区径流补给的趋势性分析, 从流域水量平衡角度商榷了纳木错湖面扩张的原因. 结果表明: 近40 a来纳木错湖泊面积不断扩张, 尤其是近10 a来最为剧烈, 2001-2009年间湖面扩张超过50 km². 流域降水变化是纳木错湖泊面积扩张的直接原因, 另外伴随蒸发力下降, 湖面蒸发减少也是湖泊面积扩张的原因之一.

关键词: 青藏高原, 纳木错, 水量平衡, 湖泊, 冰川

Abstract: By using remote sensing images of different periods, aerial topographic map and digital elevation model, the change in surface area of Nam Co during 1970-2009 is analyzed based on geographical information system (GIS) and remote sensing (RS) techniques. According to the correlative meteorological data, the possible reasons on lake area variation are discussed by analyzing the lake pan-evaporation and precipitation, glacier ablation, as well as influx water supply. It is found that lake surface has expanded since the 1970s and even more severe during the last ten years, with an expansion more than 50 km² from 2001 to 2009. Precipitation variation is the direct cause of the lake expansion. Furthermore, the decline of lake pan-evaporation is another reason for the extension.

Key words: Tibetan Plateau, Nam Co, water balance, lake, glacier

中图分类号:

P343.3

马颖钊, 易朝路, 吴家章, 金耀. 1970-2009年纳木错湖泊面积扩张的遥感卫星观测证据及原因之商榷[J]. 冰川冻土, 2012, 34(1): 81-88.

MA Ying-zhao, YI Chao-lu, WU Jia-zhang, JIN Yao. Lake Surface Expansion of Nam Co during 1970-2009: Evidence of Satellite Remote Sensing and Cause Analysis[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2012, 34(1): 81-88.

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