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Airborne water vapour and wind lidar measurements of latent heat fluxes during COPS 2007

Kiemle, Christoph and Wirth, Martin and Fix, Andreas and Rahm, Stephan (2010) Airborne water vapour and wind lidar measurements of latent heat fluxes during COPS 2007. 25th Int. Laser Radar Conference, 5.-9. Juli 2010, St. Petersburg, Russia.

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Abstract

During the Convective and Orographically-induced Precipitation Study (COPS) in July 2007 over the Black Forest Mountains in south-western Germany, tropospheric profiles of water vapour and wind were measured with a differential absorption lidar (DIAL) and a heterodyne detection 2-μm Doppler wind lidar collocated on board the DLR Falcon research aircraft. The DIAL “WALES” is a newly developed four-wavelength system operating on three water vapour absorption lines of different strengths, one offline wavelength at 935 nm (each 50 Hz, 40 mJ), and 532 and 1064 nm for aerosol profiling. It is designed as an airborne demonstrator for a possible future spaceborne water vapour lidar mission. For the study of summertime convection initiation over complex terrain, latent heat flux missions were flown where both lidars were pointed nadir-viewing. Using eddy-correlation of the wind and water vapor fluctuations beneath the aircraft, an area-representative water vapor or latent heat flux profile can be obtained by a single over-flight of the convective boundary layer in complex terrain. The lidars’ horizontal and vertical resolution is about 200 m which resolves the dominant circulation patterns and flux contributions. This novel instrumentation allows obtaining profiles of the latent heat flux beneath the aircraft from one single over-flight of the area of interest.

Document Type:Conference or Workshop Item (Speech)
Title:Airborne water vapour and wind lidar measurements of latent heat fluxes during COPS 2007
Authors:
AuthorsInstitution or Email of Authors
Kiemle, ChristophDLR IPA
Wirth, MartinDLR IPA
Fix, AndreasDLR IPA
Rahm, StephanDLR IPA
Date:July 2010
Refereed publication:Yes
In ISI Web of Science:No
Status:Published
Keywords:airborne lidar, water vapour, latent heat flux, boundary layer
Event Title:25th Int. Laser Radar Conference
Event Location:St. Petersburg, Russia
Event Type:international Conference
Event Dates:5.-9. Juli 2010
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Projekt WALES (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Dr.rer.nat. Christoph Kiemle
Deposited On:06 Dec 2010 17:07
Last Modified:13 Feb 2012 18:10

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