A sea temperature data assimilation system for the China Seas and adjacent areas  

作　　者：YOU Xiaobao, ZHOU Guangqing, ZHU Jiang LI Rongfeng LASG, Institutel of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China 

出　　处：《Chinese Science Bulletin》2003年第S2期70-76,共7页

摘　　要：A sea temperature data assimilation system forthe China Seas and adjacent areas is developed based on anested regional ocean circulation model and variational op-timal interpolation assimilation method. A 12-year assimila-tion experiment is performed by using the observationaltemperature profiles from World Ocean Database 1998(WOD98) and ECMWF reanalysis surface wind stress. Ex-perimental results indicate that the variational schemeshows good skill in assimilating the observed sea temperatureinto a regional ocean circulation model. Compared withsimulation alone, the sea temperature data assimilation sig-nificantly improves the performance of a regional oceanmodel and obtains comprehensive description of the circula-tions in the China Seas and adjacent areas. Assimilation re-sults, such as the strength and flowing axis of the Kuroshio,Yellow Sea Cold Water Mass and its corresponding horizon-tal circulation in summer and dipole eddies in the SouthChina Sea in the late summer/early autumn and the east-ward jet between them, are well consistent with the observedevidences.A sea temperature data assimilation system for the China Seas and adjacent areas is developed based on a nested regional ocean circulation model and variational op- timal interpolation assimilation method. A 12-year assimila- tion experiment is performed by using the observational temperature profiles from World Ocean Database 1998 (WOD98) and ECMWF reanalysis surface wind stress. Ex- perimental results indicate that the variational scheme shows good skill in assimilating the observed sea temperature into a regional ocean circulation model. Compared with simulation alone, the sea temperature data assimilation sig- nificantly improves the performance of a regional ocean model and obtains comprehensive description of the circula- tions in the China Seas and adjacent areas. Assimilation re- sults, such as the strength and flowing axis of the Kuroshio, Yellow Sea Cold Water Mass and its corresponding horizon- tal circulation in summer and dipole eddies in the South China Sea in the late summer/early autumn and the east- ward jet between them, are well consistent with the observed evidences.

关 键 词：nested model data ASSIMILATION VARIATIONAL method KUROSHIO Yellow Sea Cold Water Mass DIPOLE eddies. 

分 类 号：P731.11[天文地球—海洋科学]