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    Characterizing the Spatial Scales of Extreme Daily Precipitation in the United States

    Source: Journal of Climate:;2018:;volume 031:;issue 019::page 8023
    Author:
    Touma, Danielle
    ,
    Michalak, Anna M.
    ,
    Swain, Daniel L.
    ,
    Diffenbaugh, Noah S.
    DOI: 10.1175/JCLI-D-18-0019.1
    Publisher: American Meteorological Society
    Abstract: AbstractThe spatial extent of an extreme precipitation event can be important for a basin?s hydrologic response and subsequent flood risk, and may yield insights into underlying atmospheric processes. Using a relaxed moving-neighborhood approach, we develop indicator semivariograms based on precipitation records from the Global Historical Climatology Network?Daily (GHCN-D) station network to directly quantify the climatological length scales of extreme daily precipitation over the United States during 1965?2014. We find that the length scales of extreme (90th percentile) daily precipitation events vary both regionally and seasonally. Over the eastern half of the United States, daily extreme precipitation length scales reach 400 km during the winter months, but are approximately half as large during the summer months. The Northwest region, on the other hand, exhibits little seasonal variation, with extreme precipitation length scales of approximately 150 km throughout the year. By leveraging in situ station measurements, our study avoids some of the uncertainties associated with satellite or interpolated precipitation data, and provides the longest climatological assessment of length scales of extreme daily precipitation over the United States to date. Although the length scales that we calculate can be sensitive to station density, neighborhood size, and neighborhood relaxation, we find that the interregional and interseasonal differences in length scales are relatively robust. Our method could be extended to quantify changes in the spatial extent of extreme daily precipitation in the recent past, and to investigate the underlying causes of any changes that are detected.
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      Characterizing the Spatial Scales of Extreme Daily Precipitation in the United States

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    contributor authorTouma, Danielle
    contributor authorMichalak, Anna M.
    contributor authorSwain, Daniel L.
    contributor authorDiffenbaugh, Noah S.
    date accessioned2019-09-19T10:01:18Z
    date available2019-09-19T10:01:18Z
    date copyright7/26/2018 12:00:00 AM
    date issued2018
    identifier otherjcli-d-18-0019.1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4260668
    description abstractAbstractThe spatial extent of an extreme precipitation event can be important for a basin?s hydrologic response and subsequent flood risk, and may yield insights into underlying atmospheric processes. Using a relaxed moving-neighborhood approach, we develop indicator semivariograms based on precipitation records from the Global Historical Climatology Network?Daily (GHCN-D) station network to directly quantify the climatological length scales of extreme daily precipitation over the United States during 1965?2014. We find that the length scales of extreme (90th percentile) daily precipitation events vary both regionally and seasonally. Over the eastern half of the United States, daily extreme precipitation length scales reach 400 km during the winter months, but are approximately half as large during the summer months. The Northwest region, on the other hand, exhibits little seasonal variation, with extreme precipitation length scales of approximately 150 km throughout the year. By leveraging in situ station measurements, our study avoids some of the uncertainties associated with satellite or interpolated precipitation data, and provides the longest climatological assessment of length scales of extreme daily precipitation over the United States to date. Although the length scales that we calculate can be sensitive to station density, neighborhood size, and neighborhood relaxation, we find that the interregional and interseasonal differences in length scales are relatively robust. Our method could be extended to quantify changes in the spatial extent of extreme daily precipitation in the recent past, and to investigate the underlying causes of any changes that are detected.
    publisherAmerican Meteorological Society
    titleCharacterizing the Spatial Scales of Extreme Daily Precipitation in the United States
    typeJournal Paper
    journal volume31
    journal issue19
    journal titleJournal of Climate
    identifier doi10.1175/JCLI-D-18-0019.1
    journal fristpage8023
    journal lastpage8037
    treeJournal of Climate:;2018:;volume 031:;issue 019
    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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