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    Carbon–Concentration and Carbon–Climate Feedbacks in CMIP5 Earth System Models

    Source: Journal of Climate:;2013:;volume( 026 ):;issue: 015::page 5289
    Author:
    Arora, Vivek K.
    ,
    Boer, George J.
    ,
    Friedlingstein, Pierre
    ,
    Eby, Michael
    ,
    Jones, Chris D.
    ,
    Christian, James R.
    ,
    Bonan, Gordon
    ,
    Bopp, Laurent
    ,
    Brovkin, Victor
    ,
    Cadule, Patricia
    ,
    Hajima, Tomohiro
    ,
    Ilyina, Tatiana
    ,
    Lindsay, Keith
    ,
    Tjiputra, Jerry F.
    ,
    Wu, Tongwen
    DOI: 10.1175/JCLI-D-12-00494.1
    Publisher: American Meteorological Society
    Abstract: he magnitude and evolution of parameters that characterize feedbacks in the coupled carbon?climate system are compared across nine Earth system models (ESMs). The analysis is based on results from biogeochemically, radiatively, and fully coupled simulations in which CO2 increases at a rate of 1% yr?1. These simulations are part of phase 5 of the Coupled Model Intercomparison Project (CMIP5). The CO2 fluxes between the atmosphere and underlying land and ocean respond to changes in atmospheric CO2 concentration and to changes in temperature and other climate variables. The carbon?concentration and carbon?climate feedback parameters characterize the response of the CO2 flux between the atmosphere and the underlying surface to these changes. Feedback parameters are calculated using two different approaches. The two approaches are equivalent and either may be used to calculate the contribution of the feedback terms to diagnosed cumulative emissions. The contribution of carbon?concentration feedback to diagnosed cumulative emissions that are consistent with the 1% increasing CO2 concentration scenario is about 4.5 times larger than the carbon?climate feedback. Differences in the modeled responses of the carbon budget to changes in CO2 and temperature are seen to be 3?4 times larger for the land components compared to the ocean components of participating models. The feedback parameters depend on the state of the system as well the forcing scenario but nevertheless provide insight into the behavior of the coupled carbon?climate system and a useful common framework for comparing models.
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      Carbon–Concentration and Carbon–Climate Feedbacks in CMIP5 Earth System Models

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    contributor authorArora, Vivek K.
    contributor authorBoer, George J.
    contributor authorFriedlingstein, Pierre
    contributor authorEby, Michael
    contributor authorJones, Chris D.
    contributor authorChristian, James R.
    contributor authorBonan, Gordon
    contributor authorBopp, Laurent
    contributor authorBrovkin, Victor
    contributor authorCadule, Patricia
    contributor authorHajima, Tomohiro
    contributor authorIlyina, Tatiana
    contributor authorLindsay, Keith
    contributor authorTjiputra, Jerry F.
    contributor authorWu, Tongwen
    date accessioned2017-06-09T17:07:10Z
    date available2017-06-09T17:07:10Z
    date copyright2013/08/01
    date issued2013
    identifier issn0894-8755
    identifier otherams-79663.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4222468
    description abstracthe magnitude and evolution of parameters that characterize feedbacks in the coupled carbon?climate system are compared across nine Earth system models (ESMs). The analysis is based on results from biogeochemically, radiatively, and fully coupled simulations in which CO2 increases at a rate of 1% yr?1. These simulations are part of phase 5 of the Coupled Model Intercomparison Project (CMIP5). The CO2 fluxes between the atmosphere and underlying land and ocean respond to changes in atmospheric CO2 concentration and to changes in temperature and other climate variables. The carbon?concentration and carbon?climate feedback parameters characterize the response of the CO2 flux between the atmosphere and the underlying surface to these changes. Feedback parameters are calculated using two different approaches. The two approaches are equivalent and either may be used to calculate the contribution of the feedback terms to diagnosed cumulative emissions. The contribution of carbon?concentration feedback to diagnosed cumulative emissions that are consistent with the 1% increasing CO2 concentration scenario is about 4.5 times larger than the carbon?climate feedback. Differences in the modeled responses of the carbon budget to changes in CO2 and temperature are seen to be 3?4 times larger for the land components compared to the ocean components of participating models. The feedback parameters depend on the state of the system as well the forcing scenario but nevertheless provide insight into the behavior of the coupled carbon?climate system and a useful common framework for comparing models.
    publisherAmerican Meteorological Society
    titleCarbon–Concentration and Carbon–Climate Feedbacks in CMIP5 Earth System Models
    typeJournal Paper
    journal volume26
    journal issue15
    journal titleJournal of Climate
    identifier doi10.1175/JCLI-D-12-00494.1
    journal fristpage5289
    journal lastpage5314
    treeJournal of Climate:;2013:;volume( 026 ):;issue: 015
    contenttypeFulltext
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