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    Midlatitude Cyclone Compositing to Constrain Climate Model Behavior Using Satellite Observations

    Source: Journal of Climate:;2008:;volume( 021 ):;issue: 022::page 5887
    Author:
    Field, P. R.
    ,
    Gettelman, A.
    ,
    Neale, R. B.
    ,
    Wood, R.
    ,
    Rasch, P. J.
    ,
    Morrison, H.
    DOI: 10.1175/2008JCLI2235.1
    Publisher: American Meteorological Society
    Abstract: Identical composite analysis of midlatitude cyclones over oceanic regions has been carried out on both output from the NCAR Community Atmosphere Model, version 3 (CAM3) and multisensor satellite data. By focusing on mean fields associated with a single phenomenon, the ability of the CAM3 to reproduce realistic midlatitude cyclones is critically appraised. A number of perturbations to the control model were tested against observations, including a candidate new microphysics package for the CAM. The new microphysics removes the temperature-dependent phase determination of the old scheme and introduces representations of microphysical processes to convert from one phase to another and from cloud to precipitation species. By subsampling composite cyclones based on systemwide mean strength (mean wind speed) and systemwide mean moisture the authors believe they are able to make meaningful like-with-like comparisons between observations and model output. All variations of the CAM tested overestimate the optical thickness of high-topped clouds in regions of precipitation. Over a system as a whole, the model can both over- and underestimate total high-topped cloud amounts. However, systemwide mean rainfall rates and composite structure appear to be in broad agreement with satellite estimates. When cyclone strength is taken into account, changes in moisture and rainfall rates from both satellite-derived observations and model output as a function of changes in sea surface temperature are in accordance with the Clausius?Clapeyron equation. The authors find that the proposed new microphysics package shows improvement to composite liquid water path fields and cloud amounts.
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      Midlatitude Cyclone Compositing to Constrain Climate Model Behavior Using Satellite Observations

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4208490
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    • Journal of Climate

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    contributor authorField, P. R.
    contributor authorGettelman, A.
    contributor authorNeale, R. B.
    contributor authorWood, R.
    contributor authorRasch, P. J.
    contributor authorMorrison, H.
    date accessioned2017-06-09T16:23:41Z
    date available2017-06-09T16:23:41Z
    date copyright2008/11/01
    date issued2008
    identifier issn0894-8755
    identifier otherams-67082.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4208490
    description abstractIdentical composite analysis of midlatitude cyclones over oceanic regions has been carried out on both output from the NCAR Community Atmosphere Model, version 3 (CAM3) and multisensor satellite data. By focusing on mean fields associated with a single phenomenon, the ability of the CAM3 to reproduce realistic midlatitude cyclones is critically appraised. A number of perturbations to the control model were tested against observations, including a candidate new microphysics package for the CAM. The new microphysics removes the temperature-dependent phase determination of the old scheme and introduces representations of microphysical processes to convert from one phase to another and from cloud to precipitation species. By subsampling composite cyclones based on systemwide mean strength (mean wind speed) and systemwide mean moisture the authors believe they are able to make meaningful like-with-like comparisons between observations and model output. All variations of the CAM tested overestimate the optical thickness of high-topped clouds in regions of precipitation. Over a system as a whole, the model can both over- and underestimate total high-topped cloud amounts. However, systemwide mean rainfall rates and composite structure appear to be in broad agreement with satellite estimates. When cyclone strength is taken into account, changes in moisture and rainfall rates from both satellite-derived observations and model output as a function of changes in sea surface temperature are in accordance with the Clausius?Clapeyron equation. The authors find that the proposed new microphysics package shows improvement to composite liquid water path fields and cloud amounts.
    publisherAmerican Meteorological Society
    titleMidlatitude Cyclone Compositing to Constrain Climate Model Behavior Using Satellite Observations
    typeJournal Paper
    journal volume21
    journal issue22
    journal titleJournal of Climate
    identifier doi10.1175/2008JCLI2235.1
    journal fristpage5887
    journal lastpage5903
    treeJournal of Climate:;2008:;volume( 021 ):;issue: 022
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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