1972一2012年青藏高原中南部内陆湖泊的水位变化

Water level variation of inland lakes on the south-central Tibetan Plateau in 1972-2012

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1972一2012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,1972一2012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一2012年的变化比1970s一1990s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。

Abstract:Qinghai Tibet plateau lake level change to clear lake record fluctuations, analysis dynamic changes in recent decades under the background of climate warming, the Qinghai Tibet Plateau typical water level of the lake, to understand global change of regional response characteristics and rules has important significance. This paper uses multi-source remote sensing data, area and water level of 5 typical lakes in 2012 1972 a southern Qinghai Tibet plateau region sequence, and analyzed the change characteristics of the water level of the lake for 40 years. The results showed that the 1972 a 2012, Pumoyum co Tower if wrong, Zhari Namco water level is rising, respectively, an increase of 0. 89 m, 0. 70 m, 0. 40 m; over the same period, water level peiku and mapangyongcuo decreased, decreased by 1. 70 m, 0. 70 M. Overall, the five lakes in 2012, the changes in the 1990s than changes in the 1970s in the 1990s more intense, from the spatial variation, in next to the edge of the Tibetan Plateau area of peiku and Ma Yong wrong occurs varies consistency, and is located in Central Zone Tower if wrong and Zhari Namco changes also show consistency.

正文快照:1引言青藏高原,我国境内面积将近250,000 km2,平均海拔4000~5000 m,有“亚洲水塔”[1]和“第三极”[2]之称,其环境变化对全球变化具有敏感效应与强烈影响[3]。青藏高原湖泊总面积约占全国湖泊总面积的51.4%[4]。近年来,在全球变暖的大背景下,湖泊水位出现了明显的变化,与气候