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Tropospheric Water Vapor Transport as Determined from Airborne Lidar Measurements

Schäfler, Andreas und Dörnbrack, Andreas und Kiemle, Christoph und Rahm, S. und Wirth, M. (2010) Tropospheric Water Vapor Transport as Determined from Airborne Lidar Measurements. Journal of Atmospheric and Oceanic Technology, 27, Seiten 2017-2030. DOI: 10.1175/2010JTECHA1418.1.

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Offizielle URL: http://journals.ametsoc.org/doi/abs/10.1175/2010JTECHA1418.1


The first collocated measurements during THORPEX (The Observing System Research and Predictability Experiment) regional campaign in Europe in 2007 were performed by a novel four-wavelength differential absorption lidar and a scanning 2-mmDoppler wind lidar on board the research aircraft Falcon of the Deutsches Zentrum fuer Luft- und Raumfahrt (DLR). One mission that was characterized by exceptionally high data coverage (47% for the specific humidity q and 63% for the horizontal wind speed) was selected to calculate the advective transport of atmospheric moisture along a 1600-km section in the warm sector of an extratropical cyclone. The observations are compared with special 1-hourly model data calculated by the ECMWF integrated forecast system. Along the cross section, the model underestimates the wind speed on average by 2.8% (0.6 m/s) and overestimates the moisture at dry layers and in the boundary layer, which results in a wet bias of 17.1% (0.2 g/kg). Nevertheless, the ECMWF model reproduces quantitatively the horizontally averaged moisture transport in the warm sector. There, the superposition of high low-level humidity and the increasing wind velocities with height resulted in a deep tropospheric layer of enhanced water vapor transport. The observed moisture transport is variable and possesses a maximum of 130 g/kg m/s in the lower troposphere. The pathways of the moisture transport from southwest via several branches of different geographical origin are identified by Lagrangian trajectories and by high values of the vertically averaged tropospheric moisture transport.

Titel:Tropospheric Water Vapor Transport as Determined from Airborne Lidar Measurements
AutorenInstitution oder E-Mail-Adresse der Autoren
Schäfler, Andreasandreas.schaefler@dlr.de
Dörnbrack, AndreasDLR IPA
Kiemle, ChristophDLR IPA
Wirth, M.DLR IPA
Datum:Dezember 2010
Erschienen in:Journal of Atmospheric and Oceanic Technology
Referierte Publikation:Ja
In Open Access:Nein
In ISI Web of Science:Ja
DOI :10.1175/2010JTECHA1418.1
Seitenbereich:Seiten 2017-2030
Stichwörter:airborne water vapour lidar, wind lidar, moisture transport
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben LIDAR-Forschung und -Entwicklung
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Lidar
Hinterlegt von: Dr.rer.nat. Christoph Kiemle
Hinterlegt am:11 Nov 2011 13:33
Letzte Änderung:12 Dez 2013 21:24

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