Describing surface fluxes in katabatic flow on Breidamerkurjökull, Iceland
2004 (English)In: Quarterly Journal of the Royal Meteorological Society, ISSN 0035-9009, Vol. 130, no 598, 1137-1151 p.Article in journal (Refereed) Published
For very stable boundary layers there is no well-accepted theory today. In this study, an improved Prandtl model with varying diffusivity is applied to less than ideal conditions for pure katabatic flow pertaining to very stable boundary layers. We find that the improved Prandtl model adequately describes the usual and persistent katabatic glacier wind on Breidamerkurjökull. This is true even for flows with very different heights and strengths of the jet. A theoretical estimate of the katabatic jet height, based on temperature deficit and lapse rate, is verified. The calculated surface fluxes compare well with the measured turbulence parameters. A possible reason for the robustness of the katabatic jet (and other low-level jets) is given in terms of the Scorer parameter. Copyright © 2004 Royal Meteorological Society.
Place, publisher, year, edition, pages
Royal meteorological Society , 2004. Vol. 130, no 598, 1137-1151 p.
Glacier wind, Low-level jet, Very stable boundary layer, WKB method
Meteorology and Atmospheric Sciences
Research subject Meteorology
IdentifiersURN: urn:nbn:se:su:diva-23222DOI: 10.1256/qj.03.52OAI: oai:DiVA.org:su-23222DiVA: diva2:190801
Part of urn:nbn:se:su:diva-1972004-05-252004-05-252010-01-04Bibliographically approved