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Introduction to the Regional Coupled model WRF4-LICOM: Performance and model intercomparison over the Western North Pacific

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Advances in Atmospheric Sciences 2020年第8期37卷 800-816页

作者： Liwei ZOU Tianjun ZHOU Jianping TANG Hailong LIU State Key Laboratory of Numerical modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of ScienceBeijing 100029China Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing 100101China School of Atmospheric Sciences Nanjing UniversityNanjing210023China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

Regional coupled modeling is one of the frontiers of regional climate modeling,but intercomparison has not been well *** this study,a community regional climate model,WRF4,with a resolution of 15 km,was coupled with a high-resolution(0.1°)North Pacific Ocean model(LICOM_np).The performance of the regional coupled model,WRF4_LICOM,was compared to that of another regional coupled model,RegCM4_LICOM,which was a coupling of version 4 of the Regional Climate model(RegCM4)with LICOM_*** analysis focused on the 2005 western North Pacific summer monsoon *** results showed that the regional coupled models with either RegCM4 or WRF4 as their atmospheric model component simulated the broad features over the WNP reasonably *** intercomparison of the regional coupled simulations exhibited different biases for different climate ***4_LICOM exhibited smaller biases in its simulation of the averaged June–July–August SST and rainfall,while WRF4_LICOM better captured the tropical cyclone(TC)intensity,the percentage contributions of rainfall induced by TCs to the total rainfall,and the diurnal cycle of rainfall and stratiform percentages,especially over land *** different behaviors in rainfall simulated by the two models were partly ascribed to the behaviors in the simulated western North Pacific subtropical high(WNPSH).The stronger(weaker)WNPSH in WRF4_LICOM(RegCM4_LICOM)was driven by overestimated(underestimated)diabatic heating,which peaked at approximately 450 hPa over the region around the Philippines in association with different condensation–radiation *** of WRF4 with LIOCM is a crucial step towards the development of the next generation of regional earth system models at the Chinese Academy of Sciences.

关键词： regional coupled model model intercomparison western North Pacific summer monsoon precipitation

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