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Similarity theory and resistance laws for the atmospheric boundary layer
SMHI.
1981 (engelsk)Rapport (Annet vitenskapelig)
Abstract [en]

The theory of the boundary layer above a therrmally active inclined terrain, in which the actual height h of the boundary layer is used as length scale, is presented. Analytical solutions for the mean wind and temperature structures are obtained. These solutions are seen to depend on the non-dimensional parameters h/L, A = hs /ys, h/zo , the slope angle u the direction of the geostrophic wind x in addition to z/h. As by-products of these solutions (1) expressions for the similarity theory stability functions a, b and c are obtained which are in agreement with the theoretical expressions of Zilitinkevichand Brost and Wyngaard (2). For slope angles much less than 0.01, u = 0 yields the well-known expressions of Zilitinkevich and Deardorff. The appreciable influence of u and x on the geostrophic drag coefficient and on the crossisobaric angle a is assessed and and presented in graphical form. Finally, a preliminary test which shows that the predicted a is in satisfactory agreement with observations, is also presented.

sted, utgiver, år, opplag, sider
SMHI , 1981. , s. 36
Serie
RMK, Rapport Meteorologi och Klimatologi, ISSN 0347-2116 ; 31
Emneord [sv]
gränsskikt
HSV kategori
Forskningsprogram
Klimat; Meteorologi
Identifikatorer
URN: urn:nbn:se:smhi:diva-2720Lokal ID: Meteorologi, Rapporter, Serie RMKOAI: oai:DiVA.org:smhi-2720DiVA, id: diva2:948016
Tilgjengelig fra: 1981-09-18 Laget: 2016-07-08 Sist oppdatert: 2020-02-28bibliografisk kontrollert

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