Response of IAP/ LASG GOALS model to the coupling of air-Sea fresh water exchange

The process of air-sea fresh water exchange is included successfully in the Global-Ocean-Atmosphere-Land-System model developed at the State Key Laboratory of Atmospheric Sciences and Geophysical Fluid Dynamics (LASG). The results of the coupled integration show that the climate drift has been controlled successfully. Analyses on the responses of ocean circulation to the changes of surface fresh water or salinity forcing show that the ocean spin-up stage under flux condition for salinity is the key to the implementation of air-sea fresh water flux coupling. This study also demonstrates that the Modified-Monthly-Flux-Anomaly coupling scheme (MMFA) brought forward by Yu and Zhang (1998) is suitable not only for daily air-sea heat flux coupling but also for daily fresh water flux coupling.