A Mechanism of Internal Decadal Atlantic Ocean Variability in a High-Resolution Coupled Climate Model

摘要: AbstractThe North Atlantic Ocean subpolar gyre (NA SPG) is an important region for initializing decadal climate forecasts. Climate model simulations and paleoclimate reconstructions have indicated that this could also exhibit large, internally generated variability on time scales. Understanding these modes of variability, their consistency across models, the conditions in which they exist clearly improving skill predictions—particularly when predictions are made with same underlying models. This study describes analyzes a mode internal NA SPG state-of-the-art, high-resolution, coupled model. has period 17 yr explains 15%–30% annual variance related ocean indices. It arises because advection heat content anomalies around SPG. Anomalous circulation drives southern half SPG, while mean anomalous temperatures ...