Acta Geographica Sinica ›› 2014, Vol. 69 ›› Issue (7): 983-992.doi: 10.11821/dlxb201407010

• Orginal Article • Previous Articles     Next Articles

Surface heat source intensity and surface water/energy balance in Shuanghu, northern Tibetan Plateau

Yanhong GUO1,2(), Yinsheng ZHANG1(), Yingzhao MA1,2, Ning MA1,2   

  1. 1.Key Laboratory of Tibetan Environmental Changes and the Land Surface Processes, Institute of Tibetan Plateau, CAS, Beijing 100101, China
    2.University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-03-26 Revised:2014-06-06 Online:2014-07-20 Published:2014-07-20
  • Supported by:
    Major State Basic Research Development Program of China (973 Program), No.2010CB951701;National Natural Science Foundation of China, No.41071042;Knowledge Innovation Project of the Chinese Academy of Sciences, No.KZCX2-YW-BR-22

Abstract:

Heat and energy exchange between land and atmosphere over the Tibetan Plateau is of great importance for the climatic system in China, east Asia as well as the world. However, there is no systematic observation on atmosphere-land interaction in northern Tibetan Plateau due to rough environmental conditions. In this paper, surface heating and energy/water balance within various temporal scales are analyzed from October 2011 to September 2012 in Shuanghu region. The results show that: (1) the surface heating is positive in the whole year, with an average value of 79.5 W/m2. However, the intensity displays obviously seasonal and diurnal patterns in this region, where it is stronger in summer than that in winter, and also higher in daytime than at night; (2) Surface energy condition varies seasonally, and latent heat exchange is dominated in July and August; (3) surface moisture imbalance occurs in this region, where the annual rainfall and evaporation is 332 mm and 312.9 mm respectively, and the difference is 19.1 mm. (4) The evaporative potential is strong with a humid index of 0.17, belonging to a typically semi-arid climatic region.

Key words: northern Tibetan Plateau, Shuanghu, surface heat source, water/energy balance