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Aspects of potential vorticity fluxes, climatology and impermeability

Egger, Joseph and Hoinka, Klaus-Peter and Spengler, Thomas (2015) Aspects of potential vorticity fluxes, climatology and impermeability. Journal of the Atmospheric Sciences (72), pp. 3257-3267. American Meteorological Society. doi: 10.1175/JAS-D-14-0196.1. ISSN 0022-4928.

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Official URL: http://journals.ametsoc.org/doi/abs/10.1175/JAS-D-14-0196.1


Some aspects of the dynamics of generalized potential vorticity (PV) density P = Omega x grad chi x are discussed with the main emphasis on P fluxes, where va is absolute vorticity and chi is a scalar. The impermeability theorem claims that there is no net P flux across a chi surface. Various forms of the flux are presented that mostly cross chi surfaces. As these fluxes are as dynamically relevant as the one chosen for the theorem, P fluxes through a surface element are inherently multivalued and there is no best choice on physical grounds. Nevertheless, the net P flux is unique for closed surfaces. This point is illustrated byPintegrals over the volume between the earth’s surface and an isentropic surface. Reanalysis data are used to present mean advective and some nonadvective P fluxes for chi = theta in height coordinates. The extratropical tropopause appears to be supported by advective P fluxes. A satisfactorily closed P budget cannot, however, be presented.

Item URL in elib:https://elib.dlr.de/111848/
Document Type:Article
Title:Aspects of potential vorticity fluxes, climatology and impermeability
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Egger, JosephMeteorologisches Inst., Univ. MünchenUNSPECIFIEDUNSPECIFIED
Spengler, ThomasGeophysical Inst. Univ. Bergen, Bergen, NorwayUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:Journal of the Atmospheric Sciences
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 3257-3267
Publisher:American Meteorological Society
Keywords:dynamical meteorology;absolute vorticity; impermeability theorem
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Atmospheric and climate research
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Transport Meteorology
Deposited By: Volkert, Dr. Hans
Deposited On:07 Apr 2017 11:33
Last Modified:06 Sep 2019 15:27

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