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Variability of three-dimensional sea breeze structure in southern France; observations and evaluation of empirical scaling laws

Drobinski, P. and Bastin, S. and Dabas, A. and Delville, P. and Reitebuch, O. (2006) Variability of three-dimensional sea breeze structure in southern France; observations and evaluation of empirical scaling laws. Annales Geophysicae, 24, pp. 1783-1799.

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Official URL: http://www.ann-geophys.net/24/1783/2006/

Abstract

Sea-breeze dynamics in southern France is investigated using an airborne Doppler lidar, a meteorological surface station network and radiosoundings, in the framework of the ESCOMPTE experiment conducted during summer 2001 in order to evaluate the role of thermal circulations on pollutant transport and ventilation. The airborne Doppler lidar WIND contributed to three-dimensional (3-D) mapping of the sea breeze circulation in an unprecedented way. The data allow access to the onshore and offshore sea breeze extents (xsb), and to the sea breeze depth (zsb) and intensity (usb). They also show that the return flow of the sea breeze circulation is very seldom seen in this area due to (i) the presence of a systematic non zero background wind, and (ii) the 3-D structure of the sea breeze caused by the complex coastline shape and topography. A thorough analysis is conducted on the impact of the two main valleys (Rhône and Durance valleys) affecting the sea breeze circulation in the area. Finally, this dataset also allows an evaluation of the existing scaling laws used to derive the sea breeze intensity, depth and horizontal extent. The main results of this study are that (i) latitude, cumulative heating and surface friction are key parameters of the sea breeze dynamics; (ii) in presence of strong synoptic flow, all scaling laws fail in predicting the sea breeze characteristics (the sea breeze depth, however being the most accurately predicted); and (iii) the ratio zsb/usb is approximately constant in the sea breeze flow.

Document Type:Article
Title:Variability of three-dimensional sea breeze structure in southern France; observations and evaluation of empirical scaling laws
Authors:
AuthorsInstitution or Email of Authors
Drobinski, P.CNRS-IPSL, Paris, F
Bastin, S.CNRS-IPSL, Paris, F
Dabas, A.Meteo-France, CNRM, Toulouse, F
Delville, P.CNRS-INSU, Meudon, F
Reitebuch, O.UNSPECIFIED
Date:9 August 2006
Journal or Publication Title:Annales Geophysicae
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:24
Page Range:pp. 1783-1799
Status:Published
Keywords:Meteorology and atmospheric dynamics, Mesoscale meteorology, Turbulence, General or miscellaneous
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Christiane Münster
Deposited On:08 Mar 2007
Last Modified:11 Nov 2014 21:56

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