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    The Effect of Gulf Stream-induced Baroclinicity on U.S. East Coast Winter Cyclones

    Source: Monthly Weather Review:;1993:;volume( 121 ):;issue: 002::page 421
    Author:
    Cione, Joseph J.
    ,
    Raman, Sethu
    ,
    Pietrafesa, Leonard J.
    DOI: 10.1175/1520-0493(1993)121<0421:TEOGSI>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Midlatitude cyclones develop off the Carolinas during winters and move north producing gale-force winds, ice, and heavy snow. It is believed that boundary-layer and air-sea interaction processes are very important during the development stages of these East Coast storms. The marine boundary layer (MBL) off the mid- Atlantic coastline is highly baroclinic due to the proximity of the Gulf Stream just offshore. Typical horizontal distances between the Wilmington coastline and the western edge of the Gulf Stream vary between 90 and 250 km annually, and this distance can deviate by over 30 km within a single week. While similar weekly Gulf Stream position standard deviations also exist at Cape Hatteras, the average annual distance to the Gulf Stream frontal zone is much smaller off Cape Hatteras, normally ranging between 30 and 100 km. This research investigates the low-level baroclinic conditions present prior to observed storm events. The examination of nine years of data on the Gulf Stream position and East Coast winter storms seems to indicate that the degree of low-level baroclinicity and modification existing prior to a cyclonic event may significantly affect the rate of cyclonic deepening off the mid-Atlantic coastline. Statistical analyses linking the observed surface-pressure decrease with both the Gulf Stream frontal location and the prestorm coastal baroclinic conditions are presented. These results quantitatively indicate that Gulf Stream-induced wintertime baroclinicity may significantly affect the regional intensification of East Coast winter cyclones.
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      The Effect of Gulf Stream-induced Baroclinicity on U.S. East Coast Winter Cyclones

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    contributor authorCione, Joseph J.
    contributor authorRaman, Sethu
    contributor authorPietrafesa, Leonard J.
    date accessioned2017-06-09T16:09:12Z
    date available2017-06-09T16:09:12Z
    date copyright1993/02/01
    date issued1993
    identifier issn0027-0644
    identifier otherams-62125.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4202983
    description abstractMidlatitude cyclones develop off the Carolinas during winters and move north producing gale-force winds, ice, and heavy snow. It is believed that boundary-layer and air-sea interaction processes are very important during the development stages of these East Coast storms. The marine boundary layer (MBL) off the mid- Atlantic coastline is highly baroclinic due to the proximity of the Gulf Stream just offshore. Typical horizontal distances between the Wilmington coastline and the western edge of the Gulf Stream vary between 90 and 250 km annually, and this distance can deviate by over 30 km within a single week. While similar weekly Gulf Stream position standard deviations also exist at Cape Hatteras, the average annual distance to the Gulf Stream frontal zone is much smaller off Cape Hatteras, normally ranging between 30 and 100 km. This research investigates the low-level baroclinic conditions present prior to observed storm events. The examination of nine years of data on the Gulf Stream position and East Coast winter storms seems to indicate that the degree of low-level baroclinicity and modification existing prior to a cyclonic event may significantly affect the rate of cyclonic deepening off the mid-Atlantic coastline. Statistical analyses linking the observed surface-pressure decrease with both the Gulf Stream frontal location and the prestorm coastal baroclinic conditions are presented. These results quantitatively indicate that Gulf Stream-induced wintertime baroclinicity may significantly affect the regional intensification of East Coast winter cyclones.
    publisherAmerican Meteorological Society
    titleThe Effect of Gulf Stream-induced Baroclinicity on U.S. East Coast Winter Cyclones
    typeJournal Paper
    journal volume121
    journal issue2
    journal titleMonthly Weather Review
    identifier doi10.1175/1520-0493(1993)121<0421:TEOGSI>2.0.CO;2
    journal fristpage421
    journal lastpage430
    treeMonthly Weather Review:;1993:;volume( 121 ):;issue: 002
    contenttypeFulltext
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