• Login
    About WHOAS
    View Item 
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • Physical Oceanography (PO)
    • View Item
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • Physical Oceanography (PO)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of WHOASCommunities & CollectionsBy Issue DateAuthorsTitlesKeywordsThis CollectionBy Issue DateAuthorsTitlesKeywords

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    The Tokar Gap jet : regional circulation, diurnal variability, and moisture transport based on numerical simulations

    Thumbnail
    View/Open
    jcli-d-14-00635%2E1.pdf (8.968Mb)
    Date
    2015-08-01
    Author
    Davis, Shannon R.  Concept link
    Pratt, Lawrence J.  Concept link
    Jiang, Houshuo  Concept link
    Metadata
    Show full item record
    Citable URI
    https://hdl.handle.net/1912/7517
    As published
    https://doi.org/10.1175/JCLI-D-14-00635.1
    DOI
    10.1175/JCLI-D-14-00635.1
    Keyword
     Africa; Orographic effects; Monsoons; Atmosphere-land interaction; Atmosphere-ocean interaction; Hydrometeorology 
    Abstract
    The structure, variability, and regional connectivity of the Tokar Gap jet (TGJ) are described using WRF Model analyses and supporting atmospheric datasets from the East African–Red Sea–Arabian Peninsula (EARSAP) region during summer 2008. Sources of the TGJ’s unique quasi-diurnal nature and association with atypically high atmospheric moisture transport are traced back to larger-scale atmospheric dynamics influencing its forcing. These include seasonal shifts in the intertropical convergence zone (ITCZ), variability of the monsoon and North African wind regimes, and ties to other orographic flow patterns. Strong modulation of the TGJ by regional processes such as the desert heating cycle, wind convergence at the ITCZ surface front, and the local land–sea breeze cycle are described. Two case studies present the interplay of these influences in detail. The first of these was an “extreme” gap wind event on 12 July, in which horizontal velocities in the Tokar Gap exceeded 26 m s−1 and the flow from the jet extended the full width of the Red Sea basin. This event coincided with development of a large mesoscale convective complex (MCC) and precipitation at the entrance of the Tokar Gap as well as smaller gaps downstream along the Arabian Peninsula. More typical behavior of the TGJ during the 2008 summer is discussed using a second case study on 19 July. Downwind impact of the TGJ is evaluated using Lagrangian model trajectories and analysis of the lateral moisture fluxes (LMFs) during jet events. These results suggest means by which TGJ contributes to large LMFs and has potential bearing upon Sahelian rainfall and MCC development.
    Description
    Author Posting. © American Meteorological Society, 2015. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 28 (2015): 5885–5907, doi:10.1175/JCLI-D-14-00635.1.
    Collections
    • Physical Oceanography (PO)
    Suggested Citation
    Journal of Climate 28 (2015): 5885–5907
     

    Related items

    Showing items related by title, author, creator and subject.

    • Thumbnail

      A multivariate estimate of the cold season atmospheric response to North Pacific SST variability 

      Revelard, Adèle; Frankignoul, Claude; Kwon, Young-Oh (American Meteorological Society, 2018-03-12)
      The Generalized Equilibrium Feedback Analysis (GEFA) is used to distinguish the influence of the Oyashio Extension (OE) and the Kuroshio Extension (KE) variability on the atmosphere from 1979 to 2014 from that of the main ...
    • Thumbnail

      The modulation of Gulf Stream influence on the troposphere by the eddy-driven jet 

      Parfitt, Rhys; Kwon, Young-Oh (American Meteorological Society, 2020-04-13)
      This study suggests that the Gulf Stream influence on the wintertime North Atlantic troposphere is most pronounced when the eddy-driven jet (EDJ) is farthest south and better collocated with the Gulf Stream. Using the ...
    • Thumbnail

      Extreme variability in Irminger Sea winter heat loss revealed by ocean observatories initiative mooring and the ERA5 reanalysis 

      Josey, Simon A.; de Jong, Marieke Femke; Oltmanns, Marilena; Moore, Kent; Weller, Robert A. (American Geophysical Union, 2018-12-18)
      Ground‐breaking measurements from the ocean observatories initiative Irminger Sea surface mooring (60°N, 39°30′W) are presented that provide the first in situ characterization of multiwinter surface heat exchange at a high ...
    All Items in WHOAS are protected by original copyright, with all rights reserved, unless otherwise indicated. WHOAS also supports the use of the Creative Commons licenses for original content.
    A service of the MBLWHOI Library | About WHOAS
    Contact Us | Send Feedback | Privacy Policy
    Core Trust Logo