The Mechanism of Arctic Climate Oscillationwith Period of 15 Years in Data of Climate Model of INM RAS
Mechanism of Arctic climate oscillation with period of 15 years is studied on the basis of INM-CM5 climate model data. For this, technique of generation and phase evolution estimation for different terms is applied. It is shown, that during positive phase of oscillation (warm Arctic) negative anomaly of temperature and salinity in North Atlantic midlatitudes happen. These anomalies are associated with positive North Atlantic Oscillation index. A quarter of period after warm Arctic, warming and salinity increase appears also in North Atlantic midlatitudes. In Arctic ocean, anomaly of temperature are generated mainly by enhanced advection of Atlantic water. Advection and surface heat fluxes give main impact to evolution of oscillation phase. Anomalies of oceanic currents responsible for advection of Atlantic water to Arctic ocean are generated mainly by surface wind stress.