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    Combining Satellite Infrared and Lightning Information to Estimate Warm‐Season Convective and Stratiform Rainfall

    Source: Journal of Applied Meteorology and Climatology:;2013:;volume( 053 ):;issue: 001::page 180
    Author:
    Xu, Weixin
    ,
    Adler, Robert F.
    ,
    Wang, Nai-Yu
    DOI: 10.1175/JAMC-D-13-069.1
    Publisher: American Meteorological Society
    Abstract: his paper describes and evaluates a satellite rainfall estimation technique that combines infrared and lightning information to estimate precipitation in deep convective systems. The algorithm is developed and tested using seven years (2002?08) of TRMM measurements over the southern United States during the warm season. Lightning information is coupled with a modified IR-based convective?stratiform technique (CST) and produces a lightning-enhanced CST (CSTL). Both the CST and CSTL are then applied to the training (2002?04) and independent (2005?08) datasets. In general, this study shows significant improvement over the IR rainfall estimates (rain area, intensity, and volume) by adding lightning information. The CST and CSTL display critical skill in estimating warm?season precipitation and the performance is very stable. The CST can generally identify the heavy (convective) and light rain regions, while CSTL further identifies convective areas that are missed by CST and removes convective cores that are incorrectly defined by CST. Specifically, the CSTL improves the convective cell detection by 5% and reduces the convective false alarm rate by more than 30%. Similarly, CSTL substantially improves the CST in the overall estimate of instantaneous rainfall rates. For example, when compared with passive microwave estimates, CSTL increases the correlation coefficient by 30%, reduces the bias by 50%, and reduces RMSE by 25%. Both CST and CSTL reproduce the rain area and volume fairly accurately over a region, although both techniques show some degree of overestimation relative to radar estimates.
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      Combining Satellite Infrared and Lightning Information to Estimate Warm‐Season Convective and Stratiform Rainfall

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4217287
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    • Journal of Applied Meteorology and Climatology

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    contributor authorXu, Weixin
    contributor authorAdler, Robert F.
    contributor authorWang, Nai-Yu
    date accessioned2017-06-09T16:50:08Z
    date available2017-06-09T16:50:08Z
    date copyright2014/01/01
    date issued2013
    identifier issn1558-8424
    identifier otherams-75001.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4217287
    description abstracthis paper describes and evaluates a satellite rainfall estimation technique that combines infrared and lightning information to estimate precipitation in deep convective systems. The algorithm is developed and tested using seven years (2002?08) of TRMM measurements over the southern United States during the warm season. Lightning information is coupled with a modified IR-based convective?stratiform technique (CST) and produces a lightning-enhanced CST (CSTL). Both the CST and CSTL are then applied to the training (2002?04) and independent (2005?08) datasets. In general, this study shows significant improvement over the IR rainfall estimates (rain area, intensity, and volume) by adding lightning information. The CST and CSTL display critical skill in estimating warm?season precipitation and the performance is very stable. The CST can generally identify the heavy (convective) and light rain regions, while CSTL further identifies convective areas that are missed by CST and removes convective cores that are incorrectly defined by CST. Specifically, the CSTL improves the convective cell detection by 5% and reduces the convective false alarm rate by more than 30%. Similarly, CSTL substantially improves the CST in the overall estimate of instantaneous rainfall rates. For example, when compared with passive microwave estimates, CSTL increases the correlation coefficient by 30%, reduces the bias by 50%, and reduces RMSE by 25%. Both CST and CSTL reproduce the rain area and volume fairly accurately over a region, although both techniques show some degree of overestimation relative to radar estimates.
    publisherAmerican Meteorological Society
    titleCombining Satellite Infrared and Lightning Information to Estimate Warm‐Season Convective and Stratiform Rainfall
    typeJournal Paper
    journal volume53
    journal issue1
    journal titleJournal of Applied Meteorology and Climatology
    identifier doi10.1175/JAMC-D-13-069.1
    journal fristpage180
    journal lastpage199
    treeJournal of Applied Meteorology and Climatology:;2013:;volume( 053 ):;issue: 001
    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