• Title of article

    Gravity wave drag and global angular momentum: geostrophic adjustment processes

  • Author/Authors

    JOSEPH EGGER ، نويسنده ,

  • Issue Information
    روزنامه با شماره پیاپی سال 2003
  • Pages
    7
  • From page
    419
  • To page
    425
  • Abstract
    Current gravity wave drag schemes alter the flow field of a numerical model by changing the velocity. It is argued that this is essentially the situation considered in the theory of geostrophic adjustment. The reduction of velocity at one moment does not necessarily lead to a reduction of the global mean velocity after adjustment in that case. It is best to discuss these processes in terms of angular momentum conservation, so that the initial loss of velocity can be seen as a reduction of the wind term which may be converted into a reduction of the mass term. Observations are used to see if this process can be detected in the angular momentum budget of the atmosphere. The data indeed reveal a rapid positive response of the mass term to the gravity wave drag.
  • Journal title
    Tellus. Series A
  • Serial Year
    2003
  • Journal title
    Tellus. Series A
  • Record number

    436475