区域气候模式RegCM砾石参数化方案及其在青藏高原模拟效果评估  

RegCM Gravel Parameterization Scheme for Regional Climate Model and Evaluation of Its Simulation Effect over Qinghai-Xizang Plateau

作　　者：刘宜纲 吕世华 徐悦[1] 马翠丽 LIU Yigang;LÜShihua;XU Yue;MA Cuili(Plateau Atmosphere and Environment Key Laboratory of Sichuan Province,College of Atmosphere Sciences,Chengdu University of Information Technology,Chengdu 610225,Sichuan,China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD),Nanjing University of Information Science&Technology,Nanjing 210044,Jiangsu,China;Baotou Meteorological Bureau,Baotou 014030,Inner-Mongolia,China)

机构地区：[1]成都信息工程大学大气科学学院高原大气与环境四川省重点实验室,四川成都610225 [2]南京信息工程大学气象灾害预报预警与评估协同创新中心,江苏南京210044 [3]内蒙古包头市气象局,内蒙古包头014030

出　　处：《高原气象》2020年第6期1257-1269,共13页Plateau Meteorology

基　　金：第二次青藏高原综合科学考察研究项目(2019QZKK0103);国家自然科学基金项目(41975007,41775016)。

摘　　要：为了将砾石的影响考虑进区域气候模式RegCM4.7中,首先建立了适配RegCM4.7模式包含砾石含量的土壤数据集,并发展了一套应用于区域气候模式的砾石参数化方案。在此基础上利用中国陆面融合再分析数据(CRA-40)评估了砾石参数化方案在高原区域的模拟效果。结果表明:整个青藏高原范围内均存在砾石,且土壤中层以下含量更高;原始土壤水热参数化方案在高原区域模拟的地表与各层土壤温度普遍低于参照数据,而砾石参数化方案较原方案有所升高;原始土壤水热参数化方案在高原区域模拟的土壤体积含水量在土壤浅层偏高,在高原西部的土壤深层偏低,而砾石参数化方案进行了一定程度的修正。通过评估,砾石参数化方案对于青藏高原土壤水热的模拟效果有较为明显的提升。In order to consider the impact of gravel into the regional climate model RegCM4.7,soil data set containing gravel content suitable for RegCM4.7 model was established first and a set of gravel parameterization scheme for regional climate model was developed.Based on this,plateau regional simulation effect of gravel parameterization scheme was evaluated using China land surface integration reanalysis data(CRA-40).Results showed that gravel existed in soil of the entire Qinghai-Xizang Plateau and the higher gravel content occupy below the middle layer of soil.The surface and soil temperature in the Qinghai-Xizang Plateau simulated by original soil water and heat parameterization scheme Generally lower than the reference data,whereas the gravel parameterization scheme had a higher simulation result compared with the original scheme;The volumetric water content in the Qinghai-Xizang Plateau simulated by original soil water and heat parameterization scheme higher in shallow soil,and lower in deep soil of western plateau,whereas the simulation of gravel parameterization scheme has been improved to a certain extent.Through validation,the gravel parameterization scheme has significantly improved the simulation effect of soil water and heat over the Qinghai-Xizang Plateau.

关 键 词：青藏高原 土壤砾石数据集 土壤砾石参数化 RegCM4.7 

分 类 号：P437[天文地球—大气科学及气象学]