Role of Penetrative Convection under the Ice in the Formation of the State of the World Ocean
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The results of numerical experiments on the sensitivity of the INMCM48 Earth System model (Institute of Numerical Mathematics, Russian Academy of Science (INM RAS)) to the various parameterizations of convection induced by the formation of a new ice are presented and analyzed. It is shown that the response in temperature and salinity is observed not only directly under the ice, but in ocean subpolar regions as well, which is especially pronounced in the North Atlantic. An effective parameterization is proposed which significantly reduces the estimation error of the surface salinity in the AO with no formation of the trends of the near-bottom salinity fields, in contrast with the well-known parameterization (Nguyen, Menemenlis and Kwok, 2009).
Keywords:INMCM Climate model of the INM RAS Arctic Ocean Southern Ocean North Atlantic convection under ice parameterization
This work was carried out at the Institute of Numerical Mathematics, Russian Academy of Sciences, and the Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, and was supported by Russian Foundation for Basic Research, project. no. 16-55-76004 ERA_a.
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