%0 Journal Article
%T The climatology and interannual variability of the East Asian summer monsoon simulated by a weakly coupled data assimilation system
%A Fei ZHENG
%A Renping LIN
%A Xiao DONG
%J Atmospheric and Oceanic Science Letters
%D 2019
%R https://doi.org/10.1080/16742834.2019.1570690
%X ABSTRACT With the motivation to improve the simulation of the East Asian summer monsoon (EASM) in coupled climate models, oceanic data assimilation (DA) was used in CAS-ESM-C (Chinese Academy of Sciences¨CEarth System Model¨CClimate Component) in this study. Observed sea surface temperature was assimilated into CAS-ESM-C. The climatology and interannual variability of the EASM simulated in CAS-ESM-C with DA were compared with a traditional AMIP-type run. Results showed that the climatological spatial pattern and annual cycle of precipitation in the western North Pacific, and the ENSO-related and EASM-related EASM circulation and precipitation, were largely improved. As shown in this study, air¨Csea coupling is important for EASM simulation. In addition, oceanic DA synchronizes the coupled model with the real world without breaking the air¨Csea coupling process. These two successful factors make the assimilation experiment a more reasonable experimental design than traditional AMIP-type simulations. Graphical Abstrac
%U https://www.tandfonline.com/doi/full/10.1080/16742834.2019.1570690