2000-2020年新疆冰湖分布时空特征分析及影响因素分析
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新疆大学地理与遥感科学学院

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P343.6

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国家级大学生创新研究项目(202110755126);新疆“天山雪松计划”项目(2020XS04)


Spatio-temporal characteristics and influencing factors of glacial lake distribution in Xinjiang from 2000 to 2020
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College of Geography and Remote Sensing Sciences,Xinjiang University

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    摘要:

    冰湖是干旱区水资源系统的重要组成部分,探究新疆冰湖变化监测可以为内陆干旱区气候自然变化过程及冰湖溃决等灾害风险评估提供参考。本文基于Google Earth Engine(GEE)遥感云平台进行监督分类,研究新疆2000-2020年冰湖面积和数量变化情况,并结合温度、降水和冰川进行影响因素分析。结果表明:(1)过去20年新疆冰湖数量和面积均呈增长趋势,截止到2020年新疆冰湖数量4027个,面积208.76km2,其中昆仑山冰湖数量占比22%,天山占比50%,阿尔泰山占比28%。(2)新疆面积小于0.1km2的冰湖数量最多,平均占冰湖总量的54.71%,面积大于0.2km2的冰湖面积占比最大,占总面积的54.07%,新疆冰湖数量分布峰值位于海拔3400m-3600m,面积分布峰值3600m-3800m。(3)研究区冰湖数量和面积与温度和降水均呈不显著相关,与冰川面积呈显著负相关,表明冰川面积是影响冰湖变化的主要因素。

    Abstract:

    Glacial lake is an important part of water resources system in arid region. Exploring the monitoring of glacial lake change in Xinjiang can provide reference for the natural climate change process and the disaster risk assessment of glacial lake outburst in inland arid region. This paper conducted supervised classification based on Google Earth Engine (GEE) remote sensing cloud platform to study the changes in the area and number of glacial lakes in Xinjiang from 2000 to 2020, and analyzed the influencing factors combined with temperature, precipitation and glacier. The results show that: (1) In the past 20 years, the number and area of glacial lakes in Xinjiang showed an increasing trend. By 2020, there were 4,027 glacial lakes in Xinjiang, covering an area of 208.76km2, among which the number of glacial lakes in Kunlun Mountains accounted for 22%, Tianshan Mountains 50% and Altai Mountains 28%.(2) In Xinjiang, the number of glacial lakes with an area smaller than 0.1km2 is the largest, accounting for 54.71% of the total glacial lakes on average, and the number of glacial lakes with an area larger than 0.2km2 accounts for the largest proportion, accounting for 54.07% of the total area. The number of glacial lakes in Xinjiang reaches its peak at an altitude of 3,400m to 3,600m, with an area distribution peak of 3,600m-3,800m.(3) The number and area of glacial lakes in the study area are not significantly correlated with temperature and precipitation, but negatively correlated with glacial area, indicating that glacial area is the main factor affecting glacial lake change.

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  • 收稿日期:2023-05-04
  • 最后修改日期:2024-01-02
  • 录用日期:2024-01-03
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