论文部分内容阅读
A 1/10 degree quasi-global except for the Arctic Ocean eddy-resolving OGCM was developed at the Institute of Atmospheric Physics (IAP), and the model has been integrated with daily atmospheric forcing form 1945 to 2008.The model is developed based on the version 2 of LASG/IAP Climate Ocean Model (LICOM).In this study, we evaluate the overall ability of the eddy-resolving OGCM to reproduce the observed fundamental characteristics of oceanic circulation with emphasis on the subtropical gyre in the Northwestern Pacific with special emphasis on the Kuroshio and its impact on the marginal sea in this study.Figure 1 shows the observed and simulated standard deviation of sea surface height, in which the model reproduced the strongest meso-scale eddy activities near the western boundary, Antarctic Circumpolar Circulation (ACC), as well as in the subtropical countercurrent.Compared with coarse resolution OGCM, the eddy-resolving OGCM does not only simulate reasonable path, meso-scale mender and separation of the Kuroshio (Figure 2), but also strong zonal jets in the subtropics associated with topography forcing and subtropical mode water (Figure 3).Further analyses shows close relationship between North Equatorial Counter Current (NECC) bifurcation, Kuroshio variability and ENSO.Due to high resolution, the model also simulates realistic offshore circulation in the marginal sea such as South China Sea, East China Sea, and Yellow Sea etc., and Kurishio exert important effects on these marginal seas.For example, both the meso-scale eddy shedding from Kuroshio near Luzon strait, and the Yellow Sea Warm Current (YSWC) as a branch of Kuroshio can be well simulated by the OGCM.