摘要
青藏高原的湖泊水位变化能够清晰的记录湖泊波动,分析近几十年来气候变暖背景下青藏高原典型湖泊水位的动态变化,对理解全球变化的区域响应特征和规律有重要意义。本文利用多源遥感数据,获取1972-2012年青藏高原南部地区5个典型湖泊的面积与水位序列,并分析了40年来湖泊水位的变化特征。研究结果表明,1972-2012年,普莫雍错,塔若错,扎日南木错水位呈上升趋势,分别上升了0.89 m、0.70 m、0.40 m;同期,佩枯错与玛旁雍错的水位呈下降趋势,分别下降了1.70 m、0.70 m。总体来看,五个湖泊在1990s-2012年的变化比1970s-1990s的变化更剧烈,从空间变化看,处于青藏高原边缘地带的佩枯错与玛旁雍错发生的变化呈现一致性,而位于中部地带的塔若错与扎日南木错的变化也呈现一致性。
The changes of lake levels could keep a record of lake variation on the TibetanPlateau. Under the background of global warming in recent years, it is of importance tounderstand regional responses to climate changes by revealing the lake level variation of theinland lakes on the Tibetan Plateau. The paper obtained the time-series of the five typical lakeareas and levels from 1972 to 2012 in the south-central Tibetan Plateau, and used the multi-sensor remote sensing data to analyze the variation of lake levels in recent 40 years. Theresults show that the three inland lakes （Pumo Yumco, Taro Co and Zhari Namco） expandedby 0.89 m, 0.70 m and 0.40 m in water level, respectively, while the two lakes （Peiku Co andMapang Yumco） presented a decreasing tendency in water level. On the whole, the period2000-2012 experienced remarkable changes compared with the preceding period （1976-1999）.In term of spatial changes, the lakes of Peiku Co and Mapang Yumco, located in south fringeof the Tibetan Plateau, have shown the consistency in lake level changes, and so are the lakesof Taro Co and Zhari Namco in the southwestern part of central Tibetan Plateau.
出处
《地理学报》
CSCD
北大核心
2014年第7期993-1001,共9页
Acta Geographica Sinica
基金
中国科学院战略性先导科技专项(B类)(XDB03030406)
国家自然科学基金项目(41371218)~~
关键词
青藏高原
湖泊水位
动态变化
遥感
Tibetan Plateau
lake level
spatial-temporal change
remote sensing
