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    The Response of Large-Scale Circulation to Obliquity-Induced Changes in Meridional Heating Gradients

    Source: Journal of Climate:;2014:;volume( 027 ):;issue: 014::page 5504
    Author:
    Mantsis, Damianos F.
    ,
    Lintner, Benjamin R.
    ,
    Broccoli, Anthony J.
    ,
    Erb, Michael P.
    ,
    Clement, Amy C.
    ,
    Park, Hyo-Seok
    DOI: 10.1175/JCLI-D-13-00526.1
    Publisher: American Meteorological Society
    Abstract: he inter- and intrahemispheric climate responses to a change in obliquity are investigated using the Geophysical Fluid Dynamics Laboratory Climate Model, version 2.1. (GFDL CM2.1). Reduced obliquity causes a weakening of the seasonal insolation contrast between the summer and winter hemispheres and a strengthening of the meridional insolation gradient within the summer hemisphere. The interhemispheric insolation change is associated with weakening of the cross-equatorial Hadley circulation and reduced heat transport from the summer hemisphere to the winter hemisphere, in both the ocean and atmosphere. In contrast, the intrahemispheric insolation change is associated with increased midlatitude summer eddy activity as seen by the increased atmospheric heat transport at those latitudes. Analysis of the zonal mean atmospheric meridional overturning circulation on isentropic surfaces confirms the increase of the midlatitude eddy circulation, which is driven by changes of sensible and latent heat fluxes, as well as changes in the stratification or distribution of entropy. It is suggested that the strengthening of this circulation is associated with an equatorward shift of the ascending branch of the winter Hadley cell.
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      The Response of Large-Scale Circulation to Obliquity-Induced Changes in Meridional Heating Gradients

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4223109
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    contributor authorMantsis, Damianos F.
    contributor authorLintner, Benjamin R.
    contributor authorBroccoli, Anthony J.
    contributor authorErb, Michael P.
    contributor authorClement, Amy C.
    contributor authorPark, Hyo-Seok
    date accessioned2017-06-09T17:09:19Z
    date available2017-06-09T17:09:19Z
    date copyright2014/07/01
    date issued2014
    identifier issn0894-8755
    identifier otherams-80239.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4223109
    description abstracthe inter- and intrahemispheric climate responses to a change in obliquity are investigated using the Geophysical Fluid Dynamics Laboratory Climate Model, version 2.1. (GFDL CM2.1). Reduced obliquity causes a weakening of the seasonal insolation contrast between the summer and winter hemispheres and a strengthening of the meridional insolation gradient within the summer hemisphere. The interhemispheric insolation change is associated with weakening of the cross-equatorial Hadley circulation and reduced heat transport from the summer hemisphere to the winter hemisphere, in both the ocean and atmosphere. In contrast, the intrahemispheric insolation change is associated with increased midlatitude summer eddy activity as seen by the increased atmospheric heat transport at those latitudes. Analysis of the zonal mean atmospheric meridional overturning circulation on isentropic surfaces confirms the increase of the midlatitude eddy circulation, which is driven by changes of sensible and latent heat fluxes, as well as changes in the stratification or distribution of entropy. It is suggested that the strengthening of this circulation is associated with an equatorward shift of the ascending branch of the winter Hadley cell.
    publisherAmerican Meteorological Society
    titleThe Response of Large-Scale Circulation to Obliquity-Induced Changes in Meridional Heating Gradients
    typeJournal Paper
    journal volume27
    journal issue14
    journal titleJournal of Climate
    identifier doi10.1175/JCLI-D-13-00526.1
    journal fristpage5504
    journal lastpage5516
    treeJournal of Climate:;2014:;volume( 027 ):;issue: 014
    contenttypeFulltext
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