Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
A parameterization model for calculation of vertical fluxes of momentum due to terrain induced gravity waves
SMHI.
1976 (English)Report (Other academic)
Abstract [sv]

Olika källor visar att det vertikala flödet av impulsmoment beroende på gravitationsvågor kan uppgå till flera tiondels pascal över bergstrakter. De därmed sammanhängande vindtendenserna är flera m/s per dag under typiska förhållanden. Beroende på storleken av denna effekt har en metod utvecklats för att parameterisera detta flöde inom ramen för en storskalig numerisk prognosmodell. Beräkningsmodellen arbetar med en kontinuerlig, och inom varje skikt lineär vindprofil och en konstant statisk stabilitet i varje skikt. Den nedre randen i varje storskalig gridbox kommer bara in som en funktion av topografin i olika riktningar. Några testfall visar vilka resultat parameteriseringsmodellen kan ge.

Abstract [en]

Various sources of informatio n indicate vertic al fluxes of mountain induced wave momentum to be on the order of several tenths of a Pascal over mountaineous terrain . The implied wind tendencies in layers of wave absorption in typical situations are several meters per second per day . On the basis of the size of this probable effect , a parameterization model has been developed to calculate t h e momentum fluxes within the framework of a large- scale numerical weather prediction model. The calculation model assumes a continuous linear wind profile as well as constant stability within each layer . The hydrostatic assumption is made for the total motion . The vertical velocities and resultant vertical momenturn fluxes are caused by the air being forced over the topography . For this mode l , the individual spectral elements of the terrain height are not important . Rather , an integral ov er the elements is used as the forcing function which determines the momen - turn flux magnitude . This forcing function must be determine-d as a function of horizontal direction for each largescale grid box . Sample calculations are given which illustrate the results possible from the parameterization model .

Place, publisher, year, edition, pages
SMHI , 1976. , p. 33
Series
RMK: Report Meteorology and Climatology, ISSN 0347-2116 ; 5
Keywords [sv]
vertikal flöden, grqavitationsvågor, numeriska modeller
National Category
Meteorology and Atmospheric Sciences Climate Research
Research subject
Meteorology; Climate
Identifiers
URN: urn:nbn:se:smhi:diva-2745Local ID: Meteorologi, Rapporter, Serie RMKOAI: oai:DiVA.org:smhi-2745DiVA, id: diva2:948041
Available from: 1976-09-18 Created: 2016-07-08 Last updated: 2019-08-02Bibliographically approved

Open Access in DiVA

fulltext(7007 kB)0 downloads
File information
File name FULLTEXT01.pdfFile size 7007 kBChecksum SHA-512
35c0929da93f38096c7dd5f2fbde87fc4688c616dddefdd406cbc67d7d43f926869aff43ff5bfa5fbc0d5bc933e943fbb50c692e9e9dff9f5a0a98015c451bd4
Type fulltextMimetype application/pdf

By organisation
SMHI
Meteorology and Atmospheric SciencesClimate Research

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 8 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
v. 2.35.7
|