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Convection-permitting regional climate model to simulate precipitation in the Qinghai-Tibet Plateau

XIONG Zhe;SONG Changqing;Key Laboratory of Climate-Environment for East Asia,Institute of Atmospheric Physics,Chinese Academy of Sciences;Faculty of Geographical Science,Beijing Normal University;  
Regional Integrated Environmental Model System, developed by the Key Laboratory of Regional Climate-Environment of the Chinese Academy of Sciences, was applied to high-resolution vegetation type data provided by the Resources and Environment Data Center of the Chinese Academy of Sciences,Chinese soil texture data provided by Beijing Normal University, monthly vegetation coverage data provided by the US Geological Survey. The convection-permitting regional climate model over the Qinghai-Tibet Plateau was thus established. The model was used for continuous simulation of the Qinghai-Tibet Plateau region from 2001-2018, focusing on precipitation with a horizontal resolution of 9 km. For precipitation,the model was found to reproduce rather well the spatial distribution and seasonal cycle,simulated precipitation was an overestimation,with annual biase from 13.01%-39.95% in different regions. The model was found to simulate spatial distribution of annual precipitation number days and 4 different levels of precipitation number days. The model could reproduce time evolution of pentad mean precipitation in different regions in the Qinghai-Tibet Plateau, with correlation coefficient of 0.901-0.981, at significance level of 1%. The lack in long-term sequence high-temporal resolution meteorological datasets for the Qinghai-Tibet Plateau is therefore overcome by convection-permitting regional climate model. This work will help to understand future changes in climate and environment in the Qinghai-Tibet Plateau.
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