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    Influence of Storm–Storm and Storm–Environment Interactions on Tropical Cyclone Formation and Evolution

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    Author
    Fowler, James P.
    Galarneau, Thomas J.
    Affiliation
    Univ Arizona, Dept Hydrol & Atmospher Sci
    Issue Date
    2017-12
    
    Metadata
    Show full item record
    Publisher
    AMER METEOROLOGICAL SOC
    Citation
    Fowler, J.P. and T.J. Galarneau, 2017: Influence of Storm–Storm and Storm–Environment Interactions on Tropical Cyclone Formation and Evolution. Mon. Wea. Rev., 145, 4855–4875, https://doi.org/10.1175/MWR-D-17-0131.1
    Journal
    MONTHLY WEATHER REVIEW
    Rights
    © 2017 American Meteorological Society.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    The aim of this study is to examine the development of four tropical cyclones (TCs) in the North Atlantic basin in late August and early September 2010. This period is of interest because four consecutive easterly waves emerged from West Africa and resulted in a multiple TC event (MTCE) over the North Atlantic. The first two TCs-Danielle and Earl-quickly developed into TCs east of 40 degrees W and eventually intensified into major hurricanes. Conversely, the last two TCs-Fiona and Gaston-developed more slowly reaching only weak tropical storm intensity at their peak. The close proximity and differing evolution of these four TCs provides a unique opportunity to examine how these TCs interacted with each other and their surrounding environment, which influenced their development as they moved westward across the North Atlantic. The results showed that concurrent extratropical cyclogenesis events over the western and eastern North Atlantic and the recurvature of TC Danielle produced increased meridional flow over the midlatitude North Atlantic. This increased meridional flow resulted in subsynoptic-scale regions of increased vertical wind shear in the subtropics, which delayed Earl's development and led to Fiona's demise. Additionally, increased meridional flow in midlatitudes contributed to anomalous drying of the subtropics. This dry air was entrained into Gaston's circulation leading to reduced convection and weakening. These TC-TC and TC-environment interactions highlight the difficult challenge of forecasting TC genesis and position posed by MTCEs in a rapidly evolving synoptic-scale flow.
    Note
    6 month embargo; published online: 4 December 2017
    ISSN
    0027-0644
    1520-0493
    DOI
    10.1175/MWR-D-17-0131.1
    Version
    Final published version
    Sponsors
    University of Arizona Office of Research and Discovery (ORD); Water, Environmental, and Energy Solutions (WEES); NOAA HFIP Award [NA12NWS4680005]
    Additional Links
    http://journals.ametsoc.org/doi/10.1175/MWR-D-17-0131.1
    ae974a485f413a2113503eed53cd6c53
    10.1175/MWR-D-17-0131.1
    Scopus Count
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    UA Faculty Publications

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