Evaluation of Reanalysis Data Based on the Three-dimensional High-density Sounding Data of the Qinghai-Tibet Plateau  

作　　者：Qin GUAN Qingping LI Chengzhen SHI Yao HU Chenghong MEI Ningjin ZHANG 

机构地区：[1]Qinghai Provincial Meteorological Observatory,Xining 811000,China [2]Huangnanzhou Meteorological Office of Qinghai Province,Tongren 811300,China

出　　处：《Meteorological and Environmental Research》2021年第1期34-41,51,共9页气象与环境研究（英文版）

基　　金：Key Research and Development Program of the Ministry of Science and Technology of China(2018YFC1501705);Qinghai Science and Technology Department Project(2020-ZJ-739);Key Project of Qinghai Provincial Meteorological Bureau(QXZ2020-03).

摘　　要：Based on the data of the third Qinghai-Tibet Plateau atmospheric science experiment from 2015 to 2017,the applicability of plateau weather systems and meteorological elements of two commonly used reanalysis data(NCEP/NCAR reanalysis data set,and ERA-Interim reanalysis data set)in the plateau was evaluated.Some conclusions are obtained as follows.Compared with EC reanalysis data,NCEP reanalysis data are more consistent with the scientific experimental data.The correlation of geopotential height is above 0.99,followed by temperature;The correlation of specific humidity is the worst.Seen from average deviation,geopotential height and temperature are both lower;for EC,the westerly and southerly winds are both weaker;for NCEP,westerly wind is weaker,while southerly wind is stronger;specific humidity is higher.From the perspective of monthly and seasonal distribution characteristics,the average deviation of geopotential height is larger in spring and summer,and that of temperature is slightly worse in late spring and early summer.In terms of wind field,EC deviation is more obvious in winter,while NCEP deviation is more obvious in late spring and early summer.Seen from spatial distribution,the deviations of geological height and temperature in the north of the plateau are smaller than those in the south of the plateau.For wind field,the westerly wind in the Qaidam Basin is weaker,and the southerly wind in the southern plateau is weaker.In vertical profile,the deviation of geopotential height at high levels is greater than that of low levels.The deviation of temperature and wind field is larger near the ground.The temperature at middle levels and the westerly wind at middle and high levels are smaller,and southerly wind is stronger for NCEP.The establishment of the three sounding stations(Gaize,Shenzha and Shiquanhe)is conducive to the discovery of plateau vortex and plateau shear line in the western plateau.The western plateau vortex and plateau shear line mostly appeared in the flood season.Most plateau weather systems

关 键 词：Data of the Qinghai-Tibet Plateau atmospheric science experiment ERA-INTERIM NCEP EVALUATION Plateau weather system 

分 类 号：P44[天文地球—大气科学及气象学]