The Study on the Land Surface Heat Fluxes over Heterogeneous Landscape of the Tibetan Plateau

doi:10.11867/j.issn.1001-8166.2006.12.1215

Advances in Earth Science ›› 2006, Vol. 21 ›› Issue (12): 1215-1223. doi: 10.11867/j.issn.1001-8166.2006.12.1215

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The Study on the Land Surface Heat Fluxes over Heterogeneous Landscape of the Tibetan Plateau

Ma Yaoming ^1,2,Yao Tandong ^1,2,Wang Jiemin ²,Hu Zeyong ²,Hirohiko Ishikawa ³,Ma Weiqiang ²,M. Menenti ⁴,Su Zhongbo ^5

1.Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China; 2.Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 3.Disaster Prevention Research Institute, Kyoto University, Kyoto,Japan; 4.Istituto Per i Sistemi Agricoli e Forestali del Mediterraneo, CNR, Naples, Italy; 5. International Institute for Geo-Information Science and Earth Observation, Enschede, The Netherlands

Received:2006-10-11 Revised:2006-10-29 Online:2006-12-15 Published:2006-12-15

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Ma Yaoming,Yao Tandong,Wang Jiemin,Hu Zeyong,Hirohiko Ishikawa,Ma Weiqi,et al. The Study on the Land Surface Heat Fluxes over Heterogeneous Landscape of the Tibetan Plateau[J]. Advances in Earth Science, 2006, 21(12): 1215-1223.

The exchange of heat fluxes between land surface and atmosphere over the Tibetan plateau area plays an important role in the Asian monsoon system, which in turn is a major component of both the energy and water cycles of the global climate system. It was also regarded as the main task in the GEWEX (Global Energy and Water Cycle Experiment) Asian Monsoon Experiment on the Tibetan plateau (GAME/Tibet, 1996-2000) and CEOP (Coordinated Enhanced Observing Period) Asia-Australia Monsoon Project (CAMP) on the Tibetan plateau (CAMP/Tibet, 2001-2006). Firstly, the field experiments of the GAME/Tibet and the CAMP/Tibet are introduced and some results on the local energy partitioning (the diurnal variations and intermonthly variations of radiation energy budget and land surface energy budget) are presented in this study.
The study of the regional distribution of land surface heat fluxes of paramount importance over heterogeneous landscape of the Tibetan Plateau is also one of the main scientific objectives of the GAME/Tibet and the CAMP/Tibet. Therefore, the regional distributions and their inter-monthly variations of surface heat fluxes (net radiation flux, soil heat flux, sensible heat flux and latent heat flux) are also presented here by combining five Landsat-7 ETM images with the field observations. The derived results were validated by using the “ground truth”, and it shows that the derived regional distributions and their inter-monthly variations of land surface heat fluxes are reasonable.
In order to upscale the land surface heat fluxes to the whole Tibetan Plateau area, the Institute of Tibetan Plateau Research (ITP) of the Chinese Academy of Sciences (CAS) is establishing a monitoring and Research Platform (MORP) for land surface and atmospheric processes on the Tibetan plateau. The establishing and monitoring plan of longterm scale (5-10 years) of the MORP, three new comprehensive observation and study stations (Mt. Qomolangma?Mt. Everest, Nam Cuo and Linzhi) and the up-scaling way were also introduced in this paper.

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