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A case study of turbulent parameters during the Antarctic winter

Published online by Cambridge University Press:  12 May 2004

Carlos Yagüe  and
José M. Redondo
Carlos Yagüe
Affiliation:
Departamento de Física de la Tierra, Astronomía y Astrofísica II. Facultad de Ciencias Físicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
José M. Redondo
Affiliation:
Departament de Física Aplicada, Jordi Girona 31, Universitat Politécnica de Catalunya, 08034 Barcelona, Spain
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Abstract

Two days of the Antarctic winter (20 and 21 June 1986) were chosen to study some turbulent parameters in this particular boundary-layer. Richardson number, Monin-Obukhov length, eddy transfer coefficients, turbulent kinetic energy, turbulent intensities, friction velocities and sensible heat flux at three levels (5, 17 and 32 m) were considered. The results show how the stability at 17 and 32 m influences the turbulent transfer at 5 m. The shear of wind is the main mechanism to produce mixing in the lower atmosphere at Antarctica, and thermal inversions associated to surface cooling develop with winds < 10 ms−1 at 5 m. The possible influence of internal gravity-waves on the atmospheric boundary-layer during strong stable stratification is studied.

Keywords

stable boundary-layerturbulent exchangesurface thermal inversions
Type
Papers—Atmospheric Sciences
Information
Antarctic Science , Volume 7 , Issue 4 , December 1995 , pp. 421 - 433
Copyright
© Antarctic Science Ltd 1995

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