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    A Three-Year Climatology of Cloud-Top Phase over the Southern Ocean and North Pacific

    Source: Journal of Climate:;2011:;volume( 024 ):;issue: 009::page 2405
    Author:
    Morrison, Anthony E.
    ,
    Siems, Steven T.
    ,
    Manton, Michael J.
    DOI: 10.1175/2010JCLI3842.1
    Publisher: American Meteorological Society
    Abstract: oderate Resolution Imaging Spectroradiometer (MODIS) Level 2 observations from the Terra satellite are used to create a 3-yr climatology of cloud-top phase over a section of the Southern Ocean (south of Australia) and the North Pacific Ocean. The intent is to highlight the extensive presence of supercooled liquid water over the Southern Ocean region, particularly during summer. The phase of such clouds directly affects the absorbed shortwave radiation, which has recently been found to be ?poorly simulated in both state-of-the-art reanalysis and coupled global climate models? (Trenberth and Fasullo).The climatology finds that supercooled liquid water is present year-round in the low-altitude clouds across this section of the Southern Ocean. Further, the MODIS cloud phase algorithm identifies very few glaciated cloud tops at temperatures above ?20°C, rather inferring a large portion of ?uncertain? cloud tops. Between 50° and 60°S during the summer, the albedo effect is compounded by a seasonal reduction in high-level cirrus. This is in direct contrast to the Bering Sea and Gulf of Alaska. Here MODIS finds a higher likelihood of observing warm liquid water clouds during summer and a reduction in the relative frequency of cloud tops within the 0° to ?20°C temperature range.As the MODIS cloud phase product has limited ability to confidently identify cloud-top phase between ?5° and ?25°C, future research should include observations from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) and other space-based sensors to help with the classification within this temperature range. Further, multiregion in situ verification of any remotely sensed observations is vital to further understanding the cloud phase processes.
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      A Three-Year Climatology of Cloud-Top Phase over the Southern Ocean and North Pacific

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    contributor authorMorrison, Anthony E.
    contributor authorSiems, Steven T.
    contributor authorManton, Michael J.
    date accessioned2017-06-09T16:36:07Z
    date available2017-06-09T16:36:07Z
    date copyright2011/05/01
    date issued2011
    identifier issn0894-8755
    identifier otherams-70740.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4212554
    description abstractoderate Resolution Imaging Spectroradiometer (MODIS) Level 2 observations from the Terra satellite are used to create a 3-yr climatology of cloud-top phase over a section of the Southern Ocean (south of Australia) and the North Pacific Ocean. The intent is to highlight the extensive presence of supercooled liquid water over the Southern Ocean region, particularly during summer. The phase of such clouds directly affects the absorbed shortwave radiation, which has recently been found to be ?poorly simulated in both state-of-the-art reanalysis and coupled global climate models? (Trenberth and Fasullo).The climatology finds that supercooled liquid water is present year-round in the low-altitude clouds across this section of the Southern Ocean. Further, the MODIS cloud phase algorithm identifies very few glaciated cloud tops at temperatures above ?20°C, rather inferring a large portion of ?uncertain? cloud tops. Between 50° and 60°S during the summer, the albedo effect is compounded by a seasonal reduction in high-level cirrus. This is in direct contrast to the Bering Sea and Gulf of Alaska. Here MODIS finds a higher likelihood of observing warm liquid water clouds during summer and a reduction in the relative frequency of cloud tops within the 0° to ?20°C temperature range.As the MODIS cloud phase product has limited ability to confidently identify cloud-top phase between ?5° and ?25°C, future research should include observations from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) and other space-based sensors to help with the classification within this temperature range. Further, multiregion in situ verification of any remotely sensed observations is vital to further understanding the cloud phase processes.
    publisherAmerican Meteorological Society
    titleA Three-Year Climatology of Cloud-Top Phase over the Southern Ocean and North Pacific
    typeJournal Paper
    journal volume24
    journal issue9
    journal titleJournal of Climate
    identifier doi10.1175/2010JCLI3842.1
    journal fristpage2405
    journal lastpage2418
    treeJournal of Climate:;2011:;volume( 024 ):;issue: 009
    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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