Comparison of sensible and latent heat fluxes during the transition season over the western Tibetan Plateau from reanalysis datasets  

作　　者：Yang Cui, Chenghai Wang Disaster Reduction Key Laboratory of Gansu Province, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China 

出　　处：《Progress in Natural Science:Materials International》2009年第6期719-726,共8页自然科学进展·国际材料（英文版）

基　　金：supported by the National Basic Research Program of China (2007CB411506);the National Natural Science Foundation of China (Grant Nos.40875050 and 40575037)

摘　　要：The sensible and latent heat fluxes during the transition season over the western Tibetan Plateau from the NCEP-1 （NCEP/NCAR Reanalysis 1）, AR-II （NCEP-DOE Reanalysis 2） and ERA40 reanalysis datasets were compared and analyzed. The results show that the phase change in soil moisture has a significant effect on the sensible and latent heat fluxes over the western Tibetan Plateau （TP） due to the freezing-thawing processes during the transition from the dry to the wet period. The uncertainties in the sensible and latent heat fluxes over the western TP are quite high in the reanalysis data, and depend largely on the success of the soil moisture simulations in the models. Improving the hydrological process simulations in the land-surface models in seasonally frozen ground and in the active frozen soil layer may be an effective way of enhancing the reliability of the surface heat fluxes from the reanalysis data over the Tibetan Plateau.The sensible and latent heat fluxes during the transition season over the western Tibetan Plateau from the NCEP-1 (NCEP/NCAR Reanalysis 1), AR-Ⅱ (NCEP-DOE Reanalysis 2) and ERA40 reanalysis datasets were compared and analyzed. The results show that the phase change in soil moisture has a significant effect on the sensible and latent heat fluxes over the western Tibetan Plateau (TP) due to the freezing-thawing processes during the transition from the dry to the wet period. The uncertainties in the sensible and latent heat fluxes over the western TP are quite high in the reanalysis data, and depend largely on the success of the soil moisture simulations in the models. Improving the hydrological process simulations in the land-surface models in seasonally frozen ground and in the active frozen soil layer may be an effective way of enhancing the reliability of the surface heat fluxes from the reanalysis data over the Tibetan Plateau.

关 键 词：Western Tibetan Plateau Surface heat fluxes Reanalysis data Transition season Freezing-thawing process 

分 类 号：P434[天文地球—大气科学及气象学]