目前对青藏高原湖泊（包括冰湖）的变化已有一些研究，然而对整个第三极地区冰川补给湖和非冰川补给湖的变化和时空差异特征仍较少进行综合对比研究。本项目拟利用1970、1990、 2000、2010和2015年 Landsat数据及野外观测，对第三极地区冰川补给湖，包括有冰川融水补给的面积较大的湖泊和冰湖（冰面湖、表碛湖、冰前湖）和非冰川融水补给湖，对其数量与面积及其变化（含新出现与消失湖泊）进行详细的研究。同时，将研究区划分为12个大的流域，对不同流域湖泊的数量、面积与水位变化进行对比。结合第二次冰川编目数据，对冰湖变化随冰川距离远近，及海拔梯度变化特征进行分析。最后，对冰川补给湖变化与前人的冰川物质平衡变化进行对比，研究区域变化的异同。结合气象数据分析湖泊变化对气候变化的响应。此项目的开展，对全面了解和掌握第三极地区湖泊状态、进一步研究湖泊扩张原因、及第三极地区水资源变化评估都具有重要的意义。

Lake changes in the Tibetan Plateau have been reported, especially those lakes of large size. However, few collective studies have been conducted about the differences of glacier-fed and non-glacier-fed lakes at the extensive scale covering all lakes in the Third Pole region. In this project, we propose to study the changes of lakes in 1970, 1990, 2000, 2010 and 2015 in the Third Pole using Landsat data. In particular, we want to compare the differences of lake changes of glacier-fed including supra-glacial, pro-glacial lakes connected/disconnected with glaciers and non-glacier-fed ones. The regional differences of lake number, area and lake level changes in the 12 great basins and entire study area will also be examined. In additional, the lake changes related with distance between glaciers (with the new released glacier inventory of China) and lakes and altitude dependences will be further studied. The lake changes in response to climate changes will be analyzed with station-based meteorological data and glacier mass-balance from previous studies. The proposed study will provide a lake inventory in the Third Pole region, and reveal the different evolution pattern of glacier-fed and non-glacier-fed lakes since 1970s. The study will provide an important database for further examining the reason of lake fast extension in the recent decades and contribution fraction of glacier to lake changes.