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Comparing Estimates of Turbulence Based on Near-Surface Measurements in the Nocturnal Stable Boundary Layer
Stockholm University, Faculty of Science, Department of Meteorology .
Stockholm University, Faculty of Science, Department of Meteorology .
2011 (English)In: Boundary-layer Meteorology, ISSN 0006-8314, E-ISSN 1573-1472, Vol. 138, no 1, 43-60 p.Article in journal (Refereed) Published
Abstract [en]

Tethered Lifting System (TLS) estimates of the dissipation rate of turbulent kinetic energy (epsilon) are reasonably well correlated with concurrent measurements of vertical velocity variance (sigma(2)(w)) obtained from sonic anemometers located on a nearby 60-m tower during the CASES-99 field experiment. Additional results in the first 100m of the nocturnal stable boundary layer confirm our earlier claim that the presence of weak but persistent background turbulence exists even during the most stable atmospheric conditions, where e can exhibit values as low as 10(-7) m(2) s(-3). We also present a set of empirical equations that incorporates TLS measurements of temperature, horizontal wind speed, and e to provide a proxy measurement for sigma(2)(w) at altitudes higher than tower heights.

Place, publisher, year, edition, pages
2011. Vol. 138, no 1, 43-60 p.
Keyword [en]
CASES-99 campaign, Dissipation rate, Residual layer, Stable boundary layer, Turbulent kinetic energy dissipation
National Category
Meteorology and Atmospheric Sciences
URN: urn:nbn:se:su:diva-68383DOI: 10.1007/s10546-010-9542-8ISI: 000286101100002OAI: diva2:472690
authorCount :4Available from: 2012-01-04 Created: 2012-01-03 Last updated: 2012-01-04Bibliographically approved

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Tjernström, MichaelSvensson, Gunilla
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