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    A Lagrangian Analysis of Deep Convective Systems and Their Local Environmental Effects

    Source: Journal of Climate:;2013:;volume( 027 ):;issue: 005::page 2072
    Author:
    Duncan, David I.
    ,
    Kummerow, Christian D.
    ,
    Elsaesser, Gregory S.
    DOI: 10.1175/JCLI-D-13-00285.1
    Publisher: American Meteorological Society
    Abstract: ife cycles of deep convective raining systems are documented through use of a Lagrangian tracking algorithm applied to high-resolution Climate Prediction Center morphing technique (CMORPH) rainfall data, permitting collocation with related environmental ancillary fields and the International Satellite Cloud Climatology Project (ISCCP) cloud states (Rossow et al. 2005). System life cycles are described in terms of propagation speed, duration, and dominant cloud structures. Tracked systems are usually associated with the ISCCP weather state 1 (WS1) deep convection cloud state and an independent, microwave-based deep convective precipitation regime developed here. The distribution and characteristics of tracked systems are found to be similar between ocean basins in terms of system speed and duration, with westward-propagating systems predominant in every basin.The effects that these systems have on environmental parameters are assessed, stratified according to their average propagation speed and by ocean basin. Regardless of system speed the net effect on the environment is similar, with the largest difference being how quickly changes occur, with net surface radiation decreasing about 150 W m?2 and total precipitable water perturbed by 5?7 kg m?2; sea surface temperature (SST) drops 0.2°?0.3°C over 24 h, with system speed affecting how long SSTs remain depressed. The observed drop in SST is partly caused by the presence of widespread, optically thick clouds that greatly decrease the net surface radiative flux. Quick changes in SSTs caused by tracked systems are captured by buoys but not represented well in gridded SST products, as these regions remain largely under the precipitating cloud cover associated with these systems.
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      A Lagrangian Analysis of Deep Convective Systems and Their Local Environmental Effects

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4222937
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    contributor authorDuncan, David I.
    contributor authorKummerow, Christian D.
    contributor authorElsaesser, Gregory S.
    date accessioned2017-06-09T17:08:42Z
    date available2017-06-09T17:08:42Z
    date copyright2014/03/01
    date issued2013
    identifier issn0894-8755
    identifier otherams-80084.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4222937
    description abstractife cycles of deep convective raining systems are documented through use of a Lagrangian tracking algorithm applied to high-resolution Climate Prediction Center morphing technique (CMORPH) rainfall data, permitting collocation with related environmental ancillary fields and the International Satellite Cloud Climatology Project (ISCCP) cloud states (Rossow et al. 2005). System life cycles are described in terms of propagation speed, duration, and dominant cloud structures. Tracked systems are usually associated with the ISCCP weather state 1 (WS1) deep convection cloud state and an independent, microwave-based deep convective precipitation regime developed here. The distribution and characteristics of tracked systems are found to be similar between ocean basins in terms of system speed and duration, with westward-propagating systems predominant in every basin.The effects that these systems have on environmental parameters are assessed, stratified according to their average propagation speed and by ocean basin. Regardless of system speed the net effect on the environment is similar, with the largest difference being how quickly changes occur, with net surface radiation decreasing about 150 W m?2 and total precipitable water perturbed by 5?7 kg m?2; sea surface temperature (SST) drops 0.2°?0.3°C over 24 h, with system speed affecting how long SSTs remain depressed. The observed drop in SST is partly caused by the presence of widespread, optically thick clouds that greatly decrease the net surface radiative flux. Quick changes in SSTs caused by tracked systems are captured by buoys but not represented well in gridded SST products, as these regions remain largely under the precipitating cloud cover associated with these systems.
    publisherAmerican Meteorological Society
    titleA Lagrangian Analysis of Deep Convective Systems and Their Local Environmental Effects
    typeJournal Paper
    journal volume27
    journal issue5
    journal titleJournal of Climate
    identifier doi10.1175/JCLI-D-13-00285.1
    journal fristpage2072
    journal lastpage2086
    treeJournal of Climate:;2013:;volume( 027 ):;issue: 005
    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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