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可可西里湖泊水面面积与雪冰覆盖率相关分析------骆腾飞,谭德宝 ,文雄飞,赵登忠
      来源:南京水利水文自动化研究所    [大][中][小]

骆腾飞1,谭德宝1,2 ,文雄飞2,赵登忠2

1.河海大学计算机与信息学院,江苏 南京210098

2.长江科学院空间信息技术应用研究所,湖北 武汉 430010

  :气候变化对青藏高原湖泊水面面积会产生很大的影响,雪冰覆盖作为气候变化的一个重要因素,也对青藏高原湖泊水面面积有一定的影响。利用遥感影像提取2009—2017年可可西里地区库塞湖及周边四湖(简称为四湖)的年水面面积,同时,利用2005—2016年的MODIS积雪产品,提取四湖集水区雪冰覆盖率,结合同期五道梁气象站点的逐月平均气温数据和降水量,对四湖水面面积变化与集水区雪冰覆盖变化规律及其与五道梁站气温与降水量之间的关系进行探讨。分析表明:1)卓乃湖20119月溃决后,4个湖泊的水面面积都发生了较大的改变;22005-2014年期间,四湖集水区雪冰覆盖率总体呈小幅度增加趋势;3)卓乃湖溃决后,库塞湖及卓乃湖的水面面积与五道梁站年均气温的相关性显著提高,而库塞湖及卓乃湖的水面面积与四湖集水区雪冰覆盖率的相关性显著降低。

关键词:可可西里;湖泊水面面积;雪冰覆盖率;相关分析;相关系数;气温;降水量


Analysis of the correlation between the surface area and snow-ice coverage ratio of lakes in Kekexili Region

LUO Tengfei1, TAN Debao1,2 ,WEN Xiongfei2 , ZHAO Dengzhong2

(1.Computer and Information Engineering College, Hohai Unviversity, Nanjing 210098 China;

2. Spatial Information Technology Application Institude, Changjiang River Scientific Research Institude, Wuhan 430010, China)

Abstract: Climate change has great influence on the surface area of lakes on the Tibetan Plateau. Snow and ice cover, as one of the important factors of climate change, also has some influence on the surface area of lakes on the Tibetan Plateau. Surface area of Kusai Lake and other three surrounding lakes in Kekexili area(referred to as the four lakes) from 2009 to 2017 is extracted from the remote sensing images and the snow-ice coverage ratio of the four lakes watershed from 2005 to 2016 is extracted from MODIS snow products at the same time. Combined with average monthly temperature and monthly precipitation data in Wudaoliang meteorological station, the relationship between variation of the surface area of four lakes and snow-ice coverage ratio in four lakes watershed and air temperature and precipitation in the Wudaoliang meteorological station are discussed. Analysis shows that: the first is: since Zhuonai Lake burst on September 2011, the surface area of the four lakes has largely changed. The second is: during the period of 20052014, the snow-ice coverage ratio of the four lakes watershed showed a small increasing trend. The third is: after Zhuonai Lake burst, correlation between water area of Kusai Lake or Zhuonai Lake and average annual temperature of Wudaoliang station significantly increased, and correlation between water area of Kusai Lake or Zhuonai Lake and the snow-ice coverage ratio of the four lakes watershed decreased significantly.

Key words: Kekexili area; surface area of lakes; snow-ice coverage ratio; correlation analysis; correlation coefficient; air temperature; precipitation 

lixinling2018-05-04浏览(1740   [关闭]
   

    

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