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    Observations of Mesoscale Circulations within Extratropical Cyclones over the North Atlantic Ocean during ERICA

    Source: Monthly Weather Review:;1997:;volume( 125 ):;issue: 003::page 341
    Author:
    Liu, Ching-Hwang
    ,
    Wakimoto, Roger M.
    ,
    Roux, Frank
    DOI: 10.1175/1520-0493(1997)125<0341:OOMCWE>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Pseudo-dual-Doppler analyses of two mesoscale circulations (20?40 km in horizontal dimensions) that formed along a warm front within a rapidly deepening extratropical cyclone over the ocean are presented. The circulations were analyzed using airborne Doppler radar during ERICA (Experiment on Rapidly Intensifying Cyclones over the Atlantic) IOP (intensive observing period) 4 and are believed to be a type of frontal instability that has not been addressed in past theoretical studies of frontal waves and cyclones. These features may be the shallow circulations that have been documented to play a role in cyclogenesis when they become coupled with an upper-level baroclinic wave. The present case is compared and contrasted with the only other well-analyzed event during ERICA IOP 5. A retrieval of the perturbation pressure and buoyancy fields using the kinematic wind fields is performed in order to facilitate the interpretation of the dynamic structure of these vortices. In addition, a set of equations is derived in natural coordinates to examine the contributions to the total pressure by the cyclostrophic, buoyancy, updraft?vertical wind shear interaction, and the Bernoulli effects.
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      Observations of Mesoscale Circulations within Extratropical Cyclones over the North Atlantic Ocean during ERICA

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4203791
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    contributor authorLiu, Ching-Hwang
    contributor authorWakimoto, Roger M.
    contributor authorRoux, Frank
    date accessioned2017-06-09T16:11:11Z
    date available2017-06-09T16:11:11Z
    date copyright1997/03/01
    date issued1997
    identifier issn0027-0644
    identifier otherams-62853.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4203791
    description abstractPseudo-dual-Doppler analyses of two mesoscale circulations (20?40 km in horizontal dimensions) that formed along a warm front within a rapidly deepening extratropical cyclone over the ocean are presented. The circulations were analyzed using airborne Doppler radar during ERICA (Experiment on Rapidly Intensifying Cyclones over the Atlantic) IOP (intensive observing period) 4 and are believed to be a type of frontal instability that has not been addressed in past theoretical studies of frontal waves and cyclones. These features may be the shallow circulations that have been documented to play a role in cyclogenesis when they become coupled with an upper-level baroclinic wave. The present case is compared and contrasted with the only other well-analyzed event during ERICA IOP 5. A retrieval of the perturbation pressure and buoyancy fields using the kinematic wind fields is performed in order to facilitate the interpretation of the dynamic structure of these vortices. In addition, a set of equations is derived in natural coordinates to examine the contributions to the total pressure by the cyclostrophic, buoyancy, updraft?vertical wind shear interaction, and the Bernoulli effects.
    publisherAmerican Meteorological Society
    titleObservations of Mesoscale Circulations within Extratropical Cyclones over the North Atlantic Ocean during ERICA
    typeJournal Paper
    journal volume125
    journal issue3
    journal titleMonthly Weather Review
    identifier doi10.1175/1520-0493(1997)125<0341:OOMCWE>2.0.CO;2
    journal fristpage341
    journal lastpage364
    treeMonthly Weather Review:;1997:;volume( 125 ):;issue: 003
    contenttypeFulltext
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