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  • 1
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    A 1000-year simulation with the IPSL ocean-atmosphere coupled model (2006)
    INGV
    Details
    Publication Date: 2019-11-04
    Description: A 1000-year climate simulation is run with the ocean-atmosphere coupled model developed at the Institute Pierre- Simon Laplace (IPSL, Paris). No flux adjustment is used. The drift of the model is analyzed in terms of the seasurface temperature and deep ocean temperature. When the model's own equilibrium is reached, it is found that the Antarctic bottom water production experiences large-amplitude variation, oscillating between strong and weak episodes. This can yield oceanic temperature variation in the Southern Hemisphere and for the global mean.
    Description: Published
    Description: JCR Journal
    Description: open
    Keywords: coupled climate model ; long-termclimate simulation ; oceanic overturning circulation ; model drift ; 01. Atmosphere::01.01. Atmosphere::01.01.02. Climate ; 03. Hydrosphere::03.01. General::03.01.03. Global climate models
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 767847 bytes
    Format: application/pdf
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  • 2
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    Influence of the North Atlantic on simulated atmospheric variability (2006)
    INGV
    Details
    Publication Date: 2019-11-04
    Description: An atmospheric general circulation model is used to investigate the influence of the North Atlantic Ocean on atmospheric variability. The study covers the period from 1950 to 1994. The observed sea surface temperature and sea ice extension are used to force the atmospheric model. Several configurations of the oceanic boundary conditions were made to isolate the role of the North Atlantic and to study its non-linear interaction with forcings from other oceanic basins. The multi-realization character of the experiments distinguishes between the internal random part and the external forced part of the total variability. The potential predictability can thus be evaluated. The response of the atmosphere is also studied with a modal approach in terms of hemispheric teleconnection patterns. The North Atlantic Ocean has a direct influence on both the Northern Hemisphere annular mode and the Pacific-North-America pattern, leading to a weak predictability. However the direct response is largely modulated by forcings from other oceanic basins. The non-linearity of the system compensates the predictable component of the annular mode induced by the North Atlantic forcing. Furthermore it reduces the forced component of the Pacific-North-America pattern, increasing its chaoticity.
    Description: Published
    Description: JCR Journal
    Description: open
    Keywords: atmospheric general circulation model ; internal/external variability ; climate predictability ; teleconnections ; 02. Cryosphere::02.04. Sea ice::02.04.01. Atmosphere/sea ice/ocean interaction ; 03. Hydrosphere::03.01. General::03.01.01. Analytical and numerical modeling
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 1794100 bytes
    Format: application/pdf
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