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    ASAR and ASCAT in Polar Low Situations

    Source: Journal of Atmospheric and Oceanic Technology:;2015:;volume( 032 ):;issue: 004::page 783
    Author:
    Furevik, Birgitte Rugaard
    ,
    Schyberg, Harald
    ,
    Noer, Gunnar
    ,
    Tveter, Frank
    ,
    Röhrs, Johannes
    DOI: 10.1175/JTECH-D-14-00154.1
    Publisher: American Meteorological Society
    Abstract: orecasting and monitoring polar lows are, to a large degree, based on satellite observations from passive radiometers and from scatterometer winds in addition to synoptic observations and numerical models. Synthetic aperture radar (SAR) brings higher resolution compared to other remotely sensed sources of ocean wind, such as scatterometer data and passive microwave wind products. The added information in polar low situations from SAR and the increased-resolution scatterometer wind fields are investigated. Statistically, higher variability in the MetOp Advanced Scatterometer (ASCAT) wind is clearly found during polar low situations compared to all situations. Slightly more variability is also seen in the ASCAT 12.5-km wind product compared to the operational European Centre for Medium-Range Weather Forecasts (ECMWF) model surface winds. In two analyzed polar low cases, Environmental Satellite (Envisat) Advanced SAR (ASAR) images reveal numerous interesting features, such as the sharp fronts and the location and strength of the strongest wind field in the polar low. It is likely that if SAR images are available to operational weather forecasting, that it can in some cases lead to earlier detection of polar lows. However, a reliable wind field from SAR is still needed.
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      ASAR and ASCAT in Polar Low Situations

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    contributor authorFurevik, Birgitte Rugaard
    contributor authorSchyberg, Harald
    contributor authorNoer, Gunnar
    contributor authorTveter, Frank
    contributor authorRöhrs, Johannes
    date accessioned2017-06-09T17:25:59Z
    date available2017-06-09T17:25:59Z
    date copyright2015/04/01
    date issued2015
    identifier issn0739-0572
    identifier otherams-85159.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4228575
    description abstractorecasting and monitoring polar lows are, to a large degree, based on satellite observations from passive radiometers and from scatterometer winds in addition to synoptic observations and numerical models. Synthetic aperture radar (SAR) brings higher resolution compared to other remotely sensed sources of ocean wind, such as scatterometer data and passive microwave wind products. The added information in polar low situations from SAR and the increased-resolution scatterometer wind fields are investigated. Statistically, higher variability in the MetOp Advanced Scatterometer (ASCAT) wind is clearly found during polar low situations compared to all situations. Slightly more variability is also seen in the ASCAT 12.5-km wind product compared to the operational European Centre for Medium-Range Weather Forecasts (ECMWF) model surface winds. In two analyzed polar low cases, Environmental Satellite (Envisat) Advanced SAR (ASAR) images reveal numerous interesting features, such as the sharp fronts and the location and strength of the strongest wind field in the polar low. It is likely that if SAR images are available to operational weather forecasting, that it can in some cases lead to earlier detection of polar lows. However, a reliable wind field from SAR is still needed.
    publisherAmerican Meteorological Society
    titleASAR and ASCAT in Polar Low Situations
    typeJournal Paper
    journal volume32
    journal issue4
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/JTECH-D-14-00154.1
    journal fristpage783
    journal lastpage792
    treeJournal of Atmospheric and Oceanic Technology:;2015:;volume( 032 ):;issue: 004
    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
    yabeshDSpacePersian