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引用本文:德吉央宗,拉巴,拉巴卓玛,陈涛,杨秀海.基于多源卫星数据扎日南木错湖面变化和气象成因分析.湖泊科学,2014,26(6):963-970. DOI:10.18307/2014.0620
DEJI Yangzong,LABA,LABA Zhuoma,CHEN Tao,YANG Xiuhai.Lake area variation of Thari Namtso and its meteorological causes based on multi-sensor satellite data. J. Lake Sci.2014,26(6):963-970. DOI:10.18307/2014.0620
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基于多源卫星数据扎日南木错湖面变化和气象成因分析
德吉央宗1,2, 拉巴1,2, 拉巴卓玛1,2, 陈涛1,2, 杨秀海1,2
1.中国气象局成都高原气象研究所拉萨分部, 拉萨 850001;2.西藏高原大气环境科学研究所, 拉萨 850001
摘要:
利用Landsat(MSS、TM、ETM+)系列卫星和环境减灾卫星CCD遥感影像数据以及西藏扎日南木错地区近40年(1970-2011年)气象资料,分析湖泊面积的变化特征,并探讨湖泊面积变化的可能气象成因.结果表明,扎日南木错1975-2011年间经历了先萎缩后扩张的过程,湖泊面积呈增长趋势,增长面积为7.08km2.扎日南木错流域在过去40多年里冰川在退缩,温度升高,降水量增加,而蒸发量和最大冻土深度减少.湖泊面积与年气温之间有显著的正相关关系,气温升高可能是湖面扩大的原因之一.
关键词:  多源卫星  湖面变化  扎日南木错  气候变化
DOI:10.18307/2014.0620
分类号:
基金项目:国家自然科学基金项目(41165003)、中国气象局气候变化专项项目(CCSF201333)和公益性行业(气象)科研专项项目(GYHY201206040)联合资助
Lake area variation of Thari Namtso and its meteorological causes based on multi-sensor satellite data
DEJI Yangzong1,2, LABA1,2, LABA Zhuoma1,2, CHEN Tao1,2, YANG Xiuhai1,2
1.Lhasa Branch of Chengdu Plateau Meteorological Research Institute of China Meteorological Administration, Lhasa 850001, P.R.China;2.Tibet Institute of Plateau Atmospheric and Environmental Science Research, Lhasa 850001, P.R.China
Abstract:
Based on Landsat (MSS, TM, ETM+)satellite series and Environmental Mitigation satellite data and the 40 years of meteorological data near the Thari Namtso of Tibet, we investigated the area change in the lake and the possible meteorlogical causes. Results show that the lake experienced decrease firstly and then increased 7.08 km2 in the area during the period 1975-2011. The glacier retreats, both the temperature and rainfall saw upward trends, but evaporation and maximum depth of permafrost experienced downward trend in the watershed of Thari Namtso during the last 40 years. The causal effect analysis indicated that the area of Thari Namtso has linear relationship with annual mean temperature, that is, the area was positively associated with the annual temperature. Therefore, we infer that the increasing temperature is likely to be the main factor of lake expanding.
Key words:  Multi-sensor remote sensing  lake area change  Thari Namtso  climate change
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