Home | Contact us | Staff | Students | MyExeter (Staff) | exehub (Students) | Site map |

      StudyingResearchBusiness and communityWorking hereAlumni and supportersOur departmentsVisiting usAbout us

      Open Research Exeter (ORE)

      View Item 
      •   ORE Home
      • College of Engineering, Mathematics and Physical Sciences
      • Mathematics
      • View Item
      •   ORE Home
      • College of Engineering, Mathematics and Physical Sciences
      • Mathematics
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Vortex Erosion in a Shallow Water Model of the Polar Vortex

      Thumbnail
      View/Open
      DynAtmOc.pdf (3.857Mb)
      Date
      2017-04-13
      Author
      Beaumont, R
      Kwasniok, F
      Thuburn, J
      Date issued
      2017-04-13
      Journal
      Dynamics of Atmospheres and Oceans
      Type
      Article
      Language
      en
      Publisher
      Elsevier
      Links
      https://creativecommons.org/licenses/by/4.0/
      Rights
      Open Access funded by Engineering and Physical Sciences Research Council under a Creative Commons license
      Abstract
      The erosion of a model stratospheric polar vortex in response to bottom boundary forcing is investigated numerically. Stripping of filaments of air from the polar vortex has been implicated in the occurrence of stratospheric sudden warmings (SSWs) but it is not understood in detail what factors determine the rate and amount of stripping. Here a shallow water vortex forced by topography is used to investigate the factors initiating stripping and whether this leads the vortex to undergo an SSW. It is found that the amplitude of topographic forcing must exceed some threshold (of order 200–450 m) in order for significant stripping to occur. For larger forcing amplitudes significant stripping occurs, but not as an instantaneous response to the forcing; rather, the forcing appears to initiate a process that ultimately results in stripping several tens of days later. There appears to be no simple quantitative relationship between the amount of mass stripped and the topography amplitude. However, at least over the early stages of the experiments, there is a good correlation between the amount of mass stripped and the global integral of wave activity, which may be interpreted as a measure of the accumulated topographic forcing. Finally there does not appear to be a simple correspondence between amount of mass stripped and the occurrence of an SSW.
      Funders/Sponsor
      Robin Beaumont was supported during this research with a PhD studentship funded by an EPSRC Doctoral Training Grant.
      Description
      This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record.
      Citation
      Vol. 78. pp. 137–151
      DOI
      https://doi.org/10.1016/j.dynatmoce.2017.04.003
      URI
      http://hdl.handle.net/10871/27580
      ISSN
      0377-0265
      Collections
      • Mathematics

      Using our site |  Freedom of Information |  Data Protection |  Copyright & disclaimer |  Privacy & Cookies | 

       

       

      Related Links
      What is ORE Library Site Research Site
      Browse
      All of ORECommunities & CollectionsTitlesAuthorsTypeThis CollectionTitlesAuthorsType
      Statistics
      Most Popular ItemsStatistics by Country

      Using our site |  Freedom of Information |  Data Protection |  Copyright & disclaimer |  Privacy & Cookies |