区域气候模式RegCM砾石参数化方案在青藏高原不同区域土壤水分输送的模拟分析  

Gravel Parameterization Schemes for Regional Climate Model RegCM and Analysis of Its Simulation of Soil Moisture Transportation over the Different Areas of Qinghai-Xizang Plateau

作　　者：刘宜纲 吕世华 马翠丽[3] 徐悦 罗江鑫 LIU Yigang;LÜShihua;MA Cuili;XU Yue;LUO Jiangxin(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》2022年第1期79-92,共14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：在耦合CLM4.5的区域气候模式RegCM4.7中分别应用原始土壤水热参数化方案与改进后的砾石参数化方案在青藏高原西部、中部与东南部区域进行模拟,并根据砾石分布特征在每个区域选取单点分析了两种方案模拟结果存在差异的原因。在此基础上利用中国陆面融合再分析数据(CRA-40)检验了砾石参数化方案在高原不同区域对于土壤含水量的模拟效果。结果表明:在应用砾石参数化方案的RegCM4.7模式中:地表水分输入较其他变量是影响地表土壤水文过程的主要因素;较低的砾石含量有利于土壤水分向下传输,较高的砾石含量在高原不同区域对于土壤水分向下传输的影响作用有所不同。砾石参数化方案在高原不同区域对于土壤水分的模拟效果存在差异,在高原东南部的模拟效果提升最为明显。In the regional climate model RegCM4.7 coupled with CLM4.5,the original soil hydrothermal parameterization schemes and the improved gravel parameterization schemes were applied respectively over the western,central,and southeastern Qinghai-Xizang Plateau,and a site over each area was selected to analyze the mechanism for the discrepancy between the simulation of the two schemes according to the distribution characteristics of the gravel.Based on this,the simulation effect of the gravel parameterization schemes with soil moisture content was validated using China land surface integration reanalysis data(CRA-40).Results showed that In the RegCM4.7 using the gravel parameterization schemes:the surface moisture input is the major factor affecting the surface ground-soil hydrological process;Lower gravel content facilitates the downward transportation of soil water,whereas the impact of higher gravel content on the downward transportation of soil water varies with different areas of the plateau.the simulation effect on the soil moisture of the gravel parameterization schemes varies with different areas of the plateau,the simulation effect over the southeast plateau has been improved most significantly.

关 键 词：青藏高原 RegCM4.7 土壤砾石参数化 区域模拟效果 

分 类 号：P437[天文地球—大气科学及气象学]