Climate-Vegetation Interannual Variability and Interaction in a Coupled Atmosphere Ocean Land Model

A coupled atmosphereoceanland model,GOALSAVIM, is developed in the Institute of Atmospheric Physics (IAP), and its performance is described. The coupled model is based on an IAP/LASG climate model (GOALS) and a landsurface model with dynamic vegetation processes(Atmosphere-Vegetation Interaction Model,AVIM). It has been run 100 model years and the last 40year output is analyzed. The coupled model (GOALSAVIM) simulates some significant interannual variability of atmospheric circulation and terrestrial ecosystem. Using singular value decomposition (SVD) analysis, the relationship between ecosystem and atmospheric circulation in the East Asia is explored. It shows that the strengthening and weakening of East Asian monsoon characterized by the geopotential height at 500 hPa and the wind field at 850 hPa correspond to the spatiotemporal pattern of net primary production (NPP). The correlation coefficients between NPP and air temperature, precipitation and solar radiation are different in interannual variability because of the variation in vegetation types.