基于TIPEX Ⅲ资料对CLDAS-V2.0和GLDAS-NOAH陆面模式产品在青藏高原地区的适用性评估  

Applicability Evaluation of Merged Soil Moisture in GLDAS-NOAH and CLDAS-V2.0 Products over Qinghai-Tibetan Plateau of 2015 Based on TIPEX Ⅲ Observations

作　　者：崔园园 敬文琪 覃军[3] CUI Yuanyuan;JING Wenqi;QIN Jun(Hebei Province Meteorological Bureau,Shijiazhuang 050000,Hebei,China;Meteorological Observatory of 94758 Troops,Ningde 352000,Fujian,China;School of Environmental Studies,China University of Geosciences,Wuhan 430074,Hubei,China)

机构地区：[1]河北省气象台 [2]94758部队气象台 [3]中国地质大学(武汉)环境学院

出　　处：《高原气象》2018年第5期1143-1160,共18页Plateau Meteorology

基　　金：公益性行业(气象)科研专项(GYHY201406001);国家重点研发计划项目(2016YFA0602002)

摘　　要：利用2015年第三次青藏高原大气科学试验(TIPEX Ⅲ)五层(5,10,20,50和100 cm)土壤的温、湿度观测资料,通过计算全球陆面同化系统(GLDAS-NOAH)和中国气象局陆面同化系统的融合产品(CLDAS-V2. 0)与观测资料之间的相关性和偏差,以及分析降水事件发生后两种模式资料土壤温、湿度的响应,综合评估了融合土壤温、湿度产品在青藏高原的适用性。结果表明,CLDAS-V2. 0土壤温、湿度产品与观测资料的相关性均优于GLDAS-NOAH模式产品,且两模式产品与站点观测资料的相关性在湿季大于干季,相关性随土壤深度增加而减小; CLDAS-V2. 0土壤湿度产品相对站点观测的误差稍大于GLDAS-NOAH,且在浅层土壤两模式产品与站点观测的MRE整体上在干季大于湿季; CLDASV2. 0土壤温度产品与站点观测的RMSE在湿季大于干季,而GLDAS-NOAH产品则相反;两种模式产品均能描述出降水发生后浅层土壤温、湿度对降水的响应,但两种模式产品所描述的深层土壤温、湿度的波动幅度相对观测明显偏大;此外,两种模式产品无法重现观测到的深层土壤温、湿度相对表层土壤温、湿度变化明显"滞后"的特征以及降水后相对降水前土壤温度峰/谷值对应时间存在明显延迟的特征。In-situ soil temperature and soil moisture observations at five layers（5 cm,10 cm,20 cm,50 cm and100 cm） from the 3 rd Qinghai-Tibetan Plateau Atmospheric Scientific Experiment（TIPEX Ⅲ） were used to verify the applicability of two land surface model products,i.e.Global Land Data Assimilation System-NCEP,OSU,Air Force and Office of Hydrology（GLDAS-NOAH） and CMA（China Meteorological Administration）Land Data Assimilation System Version 2.0（CLDAS-V2.0）.This paper calculated the correlation coefficient and deviation between the two land model products and the in-situ soil temperature and soil moisture observations in 2015.In addition,this paper also analyzed the response of the soil temperature and soil moisture products from CLDAS-V2.0 and GLDAS-NOAH.From the two aspects,this study comprehensively evaluated the soil temperature and soil moisture＇applicability of the two model products over Qinghai-Tibetan Plateau.Through the above analysis,it is discovered that the correlation（both for soil temperature and soil moisture） between the CLDASV2.0 and in-situ observations is better than that of GLDAS-NOAH.The correlation between the land model products（both for CLDAS-V2.0 and GLDAS-NOAH） and in-situ observations in wet season is larger than that in dry season,and shows a decreasing trend with soil depth.The deviation of soil moisture between the CLDASV2.0 and in-situ observations is slightly larger than that of GLDAS-NOAH.In addition,in shallowsoil layers,the mean relative error（MRE） of soil moisture between the model products（both for CLDAS-V2.0 and GLDAS-NOAH） and in-situ observations during dry season is larger than that of the wet season.The root mean square error（RMSE） between CLDAS-V2.0 soil temperature product and in-situ observations in wet season is larger than that of the dry season,while this inclination of RMSE is opposite for GLDAS-NOAH temperature product during the wet and dry season.Both the CLDAS-V2.0 and GLDAS-NOAH model products can relatively accurate grasp t

关 键 词：青藏高原 第三次青藏高原大气科学试验 融合土壤温、湿度产品 适用性评估 

分 类 号：P412.1[天文地球—大气科学及气象学]