| Can Current AGCMs Reproduce Historical Changes in the Atmospheric Diabatic Heating over the Tibetan Plateau? |
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| 作者姓名： | DUAN An-Min XIAO Zhi-Xiang HU Jun |
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| 基金项目： | supported jointly by the Strategic Priority Research Program—Climate Change： Carbon Budget and Related Issues of the Chinese Academy of Sciences （Grant No. XDA-05110303）; the Chinese Ministry of Science and Technology （Grant No. 2010CB951703）; the National Natural Science Foundation of China （Grant No. 41175070）; Special Fund for Public Welfare Industry （meteorology） administered by the Chinese Ministry of Finance and Ministry of Science and Technology （Grant No. GYHY201406001）; Key Laboratory of Meteorological Disaster, Nanjing University of Information Science and Technology, Ministry of Education （Grand No. KLME1309） |
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| 摘 要： | Recent studies have demonstrated a persistent decreasing trend in the spring sensible heat（SH） source over the Tibetan Plateau（TP） during the past three decades. By comparing simulations from nine state-of-the-art atmospheric general circulation models（AGCMs） driven by historical forcing fields with both observational data and five reanalysis datasets, the authors found that the AGCMs are unable to reproduce the change in the SH flux over the TP. This deficiency arises because the observed decreasing trend in SH flux depends primarily on the change in surface wind speed according to the bulk formula, whereas in the models it is also influenced largely by changes in the land-air temperature difference related to the systematic cold bias. In addition, an obvious discrepancy exists in other aspects of the diabatic heating simulated by the models, suggesting that a significant improvement is required in the physical schemes associated with land surface processes and diabatic heating over the complicated topography.
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| 关 键 词： | Tibetan Plateau AGCMs diabatic heating trend |
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