生态与农村环境学报2012，Vol.28Issue(3)：231-237,7.
近35a西藏那曲地区湖泊动态遥感与气候因素关联度分析
Correlation Degree Analysis of Meteorological Elements and Dynamic Remote Sensing of Alpine Lakes in Naqu Region of Tibet in the Past 35 Years
摘要
Abstract
Out of the 1976, 1990, 2000 and 2010 remote sensing images of Naqu region of Tibet, information was extracted about dynamic variations of alpine lakes bigger than one square kilometer in water surface, therein. And correlation a-nalysis was done of the information with the meteorological data from 1966 to 2010 available from the nine meteorological stations in the region to explore responses of the dynamics of the lakes to changes in the climate. Results show that there were a total of 469 lakes (bigger than 1 km2 in water surface), amounting to 16 841. 93 km2 in total area in 2010. In the past 35 years, the lakes increased by 3 505. 12 km2 or 26. 28% in total area (especially in the period of 2000 -2010 by 18. 18% ) and by 96 or 25. 73% in number of lake (especially in the period of 1990 - 2000 by 13. 38% ). The area of Lake Selin Co increased from 1 648. 61 km2 in 1976 to 2 332. 55 km2 in 2010, an increase rate of 41.49% , and exceeded Lake Nam Co in area, becoming the largest saline lake in Tibet. In the past 45 years, Naqu region witnessed a general rising trend in annual mean air temperature, annual mean highest air temperature, annual mean lowest air temperature, annual mean precipitation and annual mean relative humidity, but a reverse trend in annual mean evaporation, suggesting that the climate in that region is changing towards warm and wet, and the change in temperature is the most remarkable, increasing by 2.27 ℃ from 1966 to 2010. The climate tendency rate reached 0.51 ℃ ? (10 a)-1. The gray correlation degree analysis of dynamic changes in lakes with the meteorological factors shows that the the increase in ice-snow melt-water triggered by the rise of the air temperature, the increase in precipitation, the increase in relative humidity and the decrease in evaporation were the main causes of the increase in lake area and number of lakes in Naqu of Tibet over the past 35 years. Regression of the meteorological elements with changes in lake area shows they are linearly related.关键词
西藏/那曲地区/湖泊动态/气候变化响应Key words
Tibet/ Naqu region/ dynamics of the lake/ response to climate change分类
天文与地球科学引用本文复制引用
林乃峰,沈渭寿,张慧,李海东..近35a西藏那曲地区湖泊动态遥感与气候因素关联度分析[J].生态与农村环境学报,2012,28(3):231-237,7.基金项目
环保公益性行业科研专项(20080901,200909050,201209032) （20080901,200909050,201209032）
