Journal of Geographical Sciences ›› 2009, Vol. 19 ›› Issue (2): 131-142.doi: 10.1007/s11442-009-0131-z

• Climate and Environmental Change •     Next Articles

The response of lake change to climate fluctuationin north Qinghai–Tibet Plateau in last 30 years

Bianduo, Bianbaciren, LI Lin, WANG Wei, Zhaxiyangzong   

  1. Tibet Institute of Plateau Atmospheric and Environmental Science Research, Lhasa 850001, China
  • Received:2008-05-13 Revised:2008-08-26 Online:2009-04-25 Published:2009-04-25
  • Supported by:

    National Natural Science Foundation of China, No.40761005

Abstract:

According to the analysis of the climate materials including the topographic map in 1975, the TM and CBERS satellite remote sensing materials from the 1980s to 2005 as well as the air temperature, precipitation, evaporation rate, maximum depth of snow and the biggest depth of frozen soil in the past 45 years, the water level area of four lakes at the southeast of Nagqu, Tibet including Bam Co, Pung Co, Dung Co and Nuripung Co show a distinct trend of expansion in the past 30 years. In 2005, the water level area of the above four lakes increased by 48.2 km2, 38.2 km2, 19.8 km2 and 26.0 km2 respectively compared to 1975, with the respective increase rate of 25.6%, 28.2%, 16.2% and 37.6%. That is closely related to the warming and humidified climate change in the recent years such as rise of the air temperature, increase of the precipitation, decrease of the evaporation rate and permafrost degradation.

Key words: Tibetan Plateau, Nagqu Area, lake, water level change, climate change