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Features of rainfall and latent heating structure simulated by two convective parameterization schemes

Science China Earth Sciences 2011年第4期54卷 1779-1788页

作者： WANG XiaoCong BAO Qing LIU Kun WU GuoXiong LIU YiMin State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics （LASG） Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Numerical Weather Prediction Center China Meteorological Administration Beijing 100081 China

Using the latest version of SAMIL (Spectral Atmosphere Model of IAP LASG) developed by LASG/IAP,we evaluate the model performance by analyzing rainfall,latent heating structure and other basic fields with two different convective parameterization schemes:Manabe Scheme and Tiedtke *** show that convective precipitation is excessively overestimated while stratiform precipitation is underestimated by Tiedtke scheme,thus causing less stratiform rainfall proportion compared with TRMM *** contrast,for Manabe scheme stratiform rainfall belt is well simulated,although precipitation center near Bay of Bengal (BOB) spreads eastward and northward associated with unrealistic strong rainfall downstream of the Tibet *** simulated latent heating structure indicates that Tiedtke scheme has an advantage over Manabe scheme,as the maximum convective latent heating near middle of troposphere is well ***,the stratiform latent heating structure is also well simulated by Tiedtke scheme with warming above freezing level and cooling beneath freezing *** for Manabe scheme,the simulated maximum convective latent heating lies near 700 hPa,lower than the ***,the warming due to stratiform latent heating extends to the whole vertical levels,which is unreasonable compared with *** diagram further indicates that Tiedtke scheme is superior to Manabe scheme as higher correlation between model output and observation data is achieved when Tiedtke scheme is employed,especially for the temperature near 200 ***,a possible explanation is addressed for the unrealistic stratiform rainfall by Tiedtke scheme,which is due to the neglect of detrained cloud water and cloud ice during convective *** speculation is verified through an established sensitivity experiment.

关键词： Manabe scheme Tiedtke scheme stratiform rainfall convective rainfall latent heating SAMIL

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Surface rainfall and Cloud Budgets Associated with Mei-yu Torrential rainfall over Eastern China during June 2011

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Advances in Atmospheric Sciences 2014年第6期31卷 1435-1444页

作者： ZHAI Guoqing LI Xiaofan ZHU Peijun SHEN Hangfeng ZHANG Yuanzhi Department of Earth Sciences Zhejiang University Hangzhou Weather Bureau Aviation Agency Meteorological Observatory of Zhejiang

Surface rainfall and cloud budgets associated with three heavy rainfall events that occurred over eastern China during the mei-yu season in June 2011 were analyzed using 2D cumulus ensemble model simulation *** domain mean rainfall showed three peaks in response to three prescribed ascending motion maxima,primarily through the mean moisture convergence during the torrential rainfall *** ascending motion throughout the troposphere produced strong convective rainfall during the first （9 June） and third （17-18 June） rainfall events,whereas strong prescribed ascending motion in the mid and upper troposphere and weak subsidence near the surface generated equally important stratiform and convective rainfall during the second rainfall event （14 June）.The analysis of surface rainfall budgets reveals that convective rainfall was associated with atmospheric drying during the first event and moisture convergence during the third *** stratiform and convective rainfall responded primarily to moisture convergence during the second *** analysis of grid data shows that the first and third mean rainfall maxima had smaller horizontal scales of the precipitation system than the second.

关键词： rainfall cloud budget moisture convergence atmospheric drying convective rainfall stratiform rainfall

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