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Summertime low-level jets over the high-latitude Arctic Ocean
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
2008 (English)In: Journal of Applied Meteorology and Climatology, ISSN 1558-8424, E-ISSN 1558-8432, Vol. 47, no 6, 1770-1784 p.Article in journal (Refereed) Published
Abstract [en]

The application of a simple analytic boundary layer model developed by Thorpe and Guymer did not produce good agreement with observational data for oceanic low-level jet observations even though this model has worked well for the predictions of low-level jets over continental surfaces. This failure to properly predict the boundary layer wind maxima was very puzzling because more detailed numerical boundary layer models have properly predicted these low-level oceanic wind maxima. To understand the reasons for its failure to explain the ocean observations, the authors modified the frictional terms in the horizontal linear momentum equations of Thorpe and Guymer, using a standard eddy viscosity closure technique instead of the Rayleigh friction parameterization originally used. This improvement in the modeling of the dissipation terms, which has resulted in the use of an enhanced Rayleigh friction parameterization in the horizontal momentum equations, modified the boundary layer winds such that the continental predictions remained nearly identical to those predicted previously using the Thorpe and Guymer model while the oceanic predictions have now become more representative of the measured wind speed from recent Arctic expeditions.

Place, publisher, year, edition, pages
2008. Vol. 47, no 6, 1770-1784 p.
Keyword [en]
stable boundary-layer, intermittent turbulence, expedition 1996, coriolis-force, cases-99, model, land, oscillations, aerosol, surface
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:su:diva-58261DOI: 10.1175/2007JAMC1637.1ISI: 000257718200014OAI: diva2:420187
authorCount :2Available from: 2011-05-31 Created: 2011-05-30 Last updated: 2011-05-31Bibliographically approved

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Nilsson, E. Douglas
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