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Long-range transport of Saharan dust from CALIPSO, airborne and ground-based lidars, and a regional model during COPS

Chaboureau, J.-P. and Richard, Evelyne and Pinty, J.-P. and Di Girolamo, Paolo and Kiemle, C. and Flamant, Cyrille (2009) Long-range transport of Saharan dust from CALIPSO, airborne and ground-based lidars, and a regional model during COPS. In: Annalen der Meteorologie, 44, pp. 84-85. DWD. ICAM 2009, 11.-15.5.2009, Rastatt. ISBN 978-3-88148-440-4. ISSN 0072-4122

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Abstract

A Saharan dust event affected the Rhine valley in southwestern Germany and eastern France on 1 August 2007 during the Convective and Orographically-induced Precipitation Study (COPS) experiment. Prior an episode of intense convection, a layer of dry and clean air capped by a warm and dusty layer was observed using Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO), airborne and ground-based lidar observations from North Africa to Western Europe. The origin of the different layers was investigated using a regional Meso-NH model simulation. For purpose of modeling evaluation a lidar simulator was developed for directly comparing observed and simulated vertical structures of the lidar backscattering signal. Overall, the model reproduces the vertical structure of dust and water vapor. From the simulated Lagrangian back trajectories it is found that the dust was mobilized from Mauritania sources several days before while the dry layer subsided over the north Atlantic. Off Morocco, the dry layer fold down beneath the warm and dusty air and the two-layer structure was advected to the Rhine valley in about two days. As the dry layer can delay the triggering of convection for a few hours, such dusty episodes that occur prior to convective events might be of importance for quantitative precipitation forecasts.

Document Type:Conference or Workshop Item (Speech)
Title:Long-range transport of Saharan dust from CALIPSO, airborne and ground-based lidars, and a regional model during COPS
Authors:
AuthorsInstitution or Email of Authors
Chaboureau, J.-P.OMP, Toulouse, F
Richard, EvelyneObservatoire Midi-Pyrénées, Toulouse, F
Pinty, J.-P.Univ. Paul Sabatier, Toulouse, F
Di Girolamo, PaoloUniv. degli Studi della Basilicata, Potenza, I
Kiemle, C.DLR IPA
Flamant, CyrilleUniv. Pierre et Marie Curie, Paris, F
Date:15 May 2009
Journal or Publication Title:Annalen der Meteorologie
Refereed publication:Yes
In ISI Web of Science:No
Volume:44
Page Range:pp. 84-85
Publisher:DWD
Series Name:Annalen der Meteorologie
ISSN:0072-4122
ISBN:978-3-88148-440-4
Status:Published
Keywords:Saharan dust, CALIPSO, airborne lidar
Event Title:ICAM 2009
Event Location:Rastatt
Event Type:international Conference
Event Dates:11.-15.5.2009
Organizer:DWD
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben LIDAR-Forschung und -Entwicklung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Dr.rer.nat. Christoph Kiemle
Deposited On:13 Feb 2012 14:43
Last Modified:13 Feb 2012 14:43

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