基于MODIS影像的西藏典型内陆湖泊变化研究及成因分析  

Change Research and Cause Analysis of Inland Lakes in Tibet Based on MODIS Image

作　　者：拉巴[1] 拉巴卓玛[1] 陈涛[1] 

机构地区：[1]西藏高原大气环境科学研究所,拉萨850001

出　　处：《气象与环境科学》2011年第3期37-40,共4页Meteorological and Environmental Sciences

基　　金：国家自然科学基金项目(40761005);中国气象局新技术推广项目(CMATG2008M52);西藏自治区气象局2009年局设项目资助

摘　　要：根据2002-2009年的MODIS卫星遥感数据和2000-2009年的气温、地表温度、降水量、相对湿度等气象资料分析得出,2002-2009年西藏典型湖泊面积变化显著:位于西藏藏北地区的色林错、当热雍错、扎日南木错湖泊面积呈扩大趋势,在8 a内分别增长了241.97 km2、12.8 km2、11.69 km2;位于班戈、当雄县境内的纳木错和山南地区浪卡子县的羊卓雍错湖泊面积呈显著减少趋势,分别减少了52.17 km2、96.61 km2。气温、地表温度升高导致冰雪融化和冻土层变浅是湖泊面积扩大的重要原因,而降水量减少是湖泊面积减小的主要原因。另外,西藏几大典型的内陆湖泊结冰时间变化不大。According to the 2002-2009 MODIS satellite remote sensing data and 2000-2009 meteorological data such as temperature,surface temperature,precipitation,relative humidity,the article concludes that the lake area change is significant in Tibet.The area of Selincuo lake,Dangreyongcuo lake,Zharinanmucuo lake present enlarging trend,respectively 241.97 km2,12.8 km2,11.69 km2 in 8 years;The area of Namucuo lake and Yangzhuoyongcuo lake present reducing trend significantly,respectively 52.17 km2,96.61 km2.The rising of temperature and surface temperature caused snow ice melting and permafrost shallow,which are the root causes of lake area larger.While precipitation reduced is the root cause of lake area reduced.In addition,several typical Tibetan inland lakes are little change in ice-formation time.

关 键 词：西藏藏北 湖泊变化 气温 降水量 蒸发量 结冰时间 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]