International Symposium on Regional Reanalysis, 17-19 July 2018, Bonn East Asia Regional Reanalysis Project of CMA Xudong LIANG, JinFang YIN, Feng CHEN, Ying LIU, Huizhong HE State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences 17-19 J uly 2019
CONTENTS • Motivation • Framework of EARR • Observation data • Model & DA optimization • Schedule 2
Motivation High Resolution Regional Reanalysis Chukchi–Beaufort for Europe 0.2° High-Resolution Atmospheric Reanalysis (10km) Arctic System Reanalysis (30km) North American Regional Reanalysis (32km) High-resolution Regional Reanalysis Japan (Downscaling) for the European 5 km CORDEX Domain (12-6-2 km) Bureau of Meteorology Atmospheric high-resolution Regional Reanalysis for 3 Australia (12-1.5km)
“Meiyu” Subtropical High Monsoon Tropical cyclone The complicated conditions in East Aisa 4
o China Meteorological Administration (CMA) granted the key project for data quality control(QC), global reanalysis (CRA), and East Asia Regional Reanalysis (EARR) in 2015 o Is supported by a key project of Ministry of Science and Technology of the People’s Republic of China from 2018 Chinese Academy of National Meteorological Guangdong Ocean The Institute of Meteorological Sciences, CMA Information Center ， CMA University Atmospheric Physics, CAS CMA Meteorological National Satellite Institute of Atmospheric Jiangsu Institute Lanzhou University Observation Centre Meteorological Centre Environment, CMA, of Meteorological Shenyang Sciences 5
Goals n Get a reanalysis dataset which have better quality for meso -scale weather system simulation and regional climate analysis. n Develop a reanalysis system which can assimilate the density observation in China as much as possible o Radiosonde o Weather Radar o Surface observation o Satellite o GPS/Met o … .. n Regional 10 years （ 2008-2018 ） reanalysis dataset n Horizontal resolution: 12km for East Asia, 3km for field study areas such as the Tibeten Plateau and the South China. 6
Framework of EARR n Observation data collection and quality control n Numerical model localization and data assimilation technique optimization n Reanalysis system development n Regional analysis for the East Asia n Verification and application n Data management and share 7
Weather Systems in East Asia (50.87, 2.51) (50.87, -162.51) Model Domain GSI+WRF (-10.31, 61.68) (-10.31, 138.31) Model Domain Horizontal resolution: 12km • Vertical levModel top: 10mb • Vertical levels: 70 • Microphysics: Thompson • Cumulus Parameterization: KF • Long radiation ： RRTM • 12km Short radiation ： Dudhia • Boundary layer ： YSU • Land model ： Noah-MP • 8
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Observation data Station (facility) Num. Station (facility) Num. National surface observation stations 2423 Wind profile radar 69 Reference station National unmanned Data collection automatic 57405 GNSS/MET station 950 meteorological station & quality control L-band sounding Automatic soil system 120 2075 moisture station Thunder and Doppler weather radar 181 lightning 478 observation station Wind energy Digital weather radar 52 observation station 345 Solar radiation buoy 40 observation station 100 By Dec. 31 st , 2015 10
57405 local stations AWSs cover 96.01% villages and towns. Population density of China ● stations Testing continues Nudging method 11
Type Amount L-band Radiosonde 120 (86) Wind Profiler 69 AMDAR Received AMDAR In China 50000 per day Received AMDAR By GTS 10000 per day GNSS/MET Station 950 Wind Profiler (69) Radiosonde (120) GNSS/MET Stations 12
U and V Temp CMA ： 73 levels CMA ： 51 levels Gdas ： 43 levels Gdas ： 48 levels GDAS-T+10 CMA-T Vertical resolution of radiosonde 13
Type Amount Chen F., Xudong Liang * , 2017: Application of IVAP-based Doppler Weather Radar 181 observation operator in S-band 103 radar radial velocity C-band 78 assimilation: the case of Typhoon Fitow, Mon. Wea. Digital Weather Radar 52 Rev. , 145 ， 4187-4203 Mobile Weather Radar 45 Radar Observation Coverage （ 3Km Above Ground ） 中国气象局综合观测司 14
Model & DA optimization The Third Tibetan Plateau Atmospheric Scientific Experiment （ TIPEX—III ） Radiosonde +6 Soil moisture/temperature station : 46 Mobile Radar : IOP 15
Southern China Monsoon Rainfall Experiment （ SCMREX ） (RDP project of HiWeather) 16
Downscaling experiments 17
Schedule Global reanalysis （ ERA-interim ， CRA ） 2005 2018 East Asia Regional Reanalysis 2015-2018 Set up the reanalysis system( Downscaling) 2015-2018 Conventional observations (Surface, Sounding … ) 2019 Aircraft data, GPS/Met; Version 1 (12km) 2020 Radar, Wind Profiler 2021 Version 2 (12+3km) 18
International Symposium on Regional Reanalysis, 17-19 Jul. 2018, Bonn Contact: liangxd@cma.gov.cn 19
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