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    Ozone Loss and Recovery and the Preconditioning of Upward-Propagating Planetary Wave Activity

    Source: Journal of the Atmospheric Sciences:;2013:;Volume( 070 ):;issue: 012::page 3977
    Author:
    Albers, John R.
    ,
    Nathan, Terrence R.
    DOI: 10.1175/JAS-D-12-0259.1
    Publisher: American Meteorological Society
    Abstract: mechanistic chemistry?dynamical model is used to evaluate the relative importance of radiative, photochemical, and dynamical feedbacks in communicating changes in lower-stratospheric ozone to the circulation of the stratosphere and lower mesosphere. Consistent with observations and past modeling studies of Northern Hemisphere late winter and early spring, high-latitude radiative cooling due to lower-stratospheric ozone depletion causes an increase in the modeled meridional temperature gradient, an increase in the strength of the polar vortex, and a decrease in vertical wave propagation in the lower stratosphere. Moreover, it is shown that, as planetary waves pass through the ozone loss region, dynamical feedbacks precondition the wave, causing a large increase in wave amplitude. The wave amplification causes an increase in planetary wave drag, an increase in residual circulation downwelling, and a weaker polar vortex in the upper stratosphere and lower mesosphere. The dynamical feedbacks responsible for the wave amplification are diagnosed using an ozone-modified refractive index; the results explain recent chemistry?coupled climate model simulations that suggest a link between ozone depletion and increased polar downwelling. The effects of future ozone recovery are also examined and the results provide guidance for researchers attempting to diagnose and predict how stratospheric climate will respond specifically to ozone loss and recovery versus other climate forcings including increasing greenhouse gas abundances and changing sea surface temperatures.
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      Ozone Loss and Recovery and the Preconditioning of Upward-Propagating Planetary Wave Activity

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    contributor authorAlbers, John R.
    contributor authorNathan, Terrence R.
    date accessioned2017-06-09T16:55:47Z
    date available2017-06-09T16:55:47Z
    date copyright2013/12/01
    date issued2013
    identifier issn0022-4928
    identifier otherams-76613.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4219080
    description abstractmechanistic chemistry?dynamical model is used to evaluate the relative importance of radiative, photochemical, and dynamical feedbacks in communicating changes in lower-stratospheric ozone to the circulation of the stratosphere and lower mesosphere. Consistent with observations and past modeling studies of Northern Hemisphere late winter and early spring, high-latitude radiative cooling due to lower-stratospheric ozone depletion causes an increase in the modeled meridional temperature gradient, an increase in the strength of the polar vortex, and a decrease in vertical wave propagation in the lower stratosphere. Moreover, it is shown that, as planetary waves pass through the ozone loss region, dynamical feedbacks precondition the wave, causing a large increase in wave amplitude. The wave amplification causes an increase in planetary wave drag, an increase in residual circulation downwelling, and a weaker polar vortex in the upper stratosphere and lower mesosphere. The dynamical feedbacks responsible for the wave amplification are diagnosed using an ozone-modified refractive index; the results explain recent chemistry?coupled climate model simulations that suggest a link between ozone depletion and increased polar downwelling. The effects of future ozone recovery are also examined and the results provide guidance for researchers attempting to diagnose and predict how stratospheric climate will respond specifically to ozone loss and recovery versus other climate forcings including increasing greenhouse gas abundances and changing sea surface temperatures.
    publisherAmerican Meteorological Society
    titleOzone Loss and Recovery and the Preconditioning of Upward-Propagating Planetary Wave Activity
    typeJournal Paper
    journal volume70
    journal issue12
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/JAS-D-12-0259.1
    journal fristpage3977
    journal lastpage3994
    treeJournal of the Atmospheric Sciences:;2013:;Volume( 070 ):;issue: 012
    contenttypeFulltext
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