基于遥感影像的聂拉木县冲堆普冰湖变化研究

Study on the Change of Chongduipu Glacial Lake in Nyalam County Based on Remote Sensing Images

全球气候变暖,导致冰湖溃决事件频繁发生。冲堆普位于喜马拉雅山脉中段,历史上发生过多次大型的冰湖溃决灾害,属冰湖溃决灾害的重点调查及防灾减灾地区。通过对比分析1977、1988、1999年度与2005—2019年度的冰湖边界数据,研究了40多年来冲堆普流域冰湖的变化,结果显示,该流域中的冰湖面积在持续增加。结合已有的气象资料分析冰湖变化与气象变化之间的关系,结果表明,造成冰湖面积普遍增大的主要原因是全球变暖引起冰川退化、冰雪消融。

Global warming increases the frequency of glacial lake outburst events.Chongduipu is located in the middle part of the Himalayas,where many large glacial lake outburst disasters have occurred in history.It is a key area for the investigation and disaster prevention and mitigation of glacial lake outburst disasters.By comparing and analyzing the glacial lake boundary data of 1977/1988/1999 and 2005-2019,the changes of glacial lake in the Chongduipu basin over the past 40 years have been studied.The results show that the glacial lake area in this basin has been increasing continuously.Combined with the existing meteorological data,the relationship between glacial lake changes and meteorological changes is analyzed.The results show that the main reason for the general increase of glacial lake area is the degradation of glaciers and the melting of ice and snow caused by global warming.