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Towards more accurate water vapour observations: Airborne lidar measurement examples and characteristics

Kiemle, Christoph and Flentje, Harald and Dörnbrack, Andreas and Fix, Andreas and Ehret, Gerhard (2006) Towards more accurate water vapour observations: Airborne lidar measurement examples and characteristics. In: Second THORPEX Int. Science Symposium, pp. 102-103. DLR Oberpfaffenhofen. Second THORPEX Int. Science Symposium, 2006-12-06, Landshut.

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Abstract

Airborne differential absorption lidar measurements of mid-latitude, subtropical and tropical water vapour were performed during several recent campaigns over North and South America, and Australia, as well as on the corresponding long-range transfer flights from and to Germany with the DLR “Falcon” research aircraft. These include tropospheric as well as lower stratospheric observations. Complex advection and rapid vertical transport associated with meso- and synoptic scale dynamical processes reflect in inhomogeneous water vapour distributions along the flight paths, as observed by the lidar. The tropical (Hadley) circulation, stratospheric intrusions and humidity transitions between different air masses are clearly detected. The measurements are compared to operational ECMWF analyses interpolated in space and time to the flight path. The relevant transport processes are adequately represented in the analyses as long as vertical and horizontal scales exceed roughly 0.5-1 km in the vertical and 50 km horizontally, while smaller structures and larger gradients are smoothed out. On the longer term, space-borne lidar instruments may provide unprecedented high-resolution (especially in the vertical) and high-precision, low-bias observations of water vapour throughout the troposphere with high added value to next generation observing systems for assimilation into NWP models.

Document Type:Conference or Workshop Item (Speech)
Title:Towards more accurate water vapour observations: Airborne lidar measurement examples and characteristics
Authors:
AuthorsInstitution or Email of Authors
Kiemle, ChristophUNSPECIFIED
Flentje, HaraldDWD, Hohenpeissenberg
Dörnbrack, AndreasUNSPECIFIED
Fix, AndreasUNSPECIFIED
Ehret, GerhardUNSPECIFIED
Date:6 December 2006
Journal or Publication Title:Second THORPEX Int. Science Symposium
Refereed publication:No
In ISI Web of Science:No
Page Range:pp. 102-103
Editors:
EditorsEmail
Volkert, HansUNSPECIFIED
Publisher:DLR Oberpfaffenhofen
Status:Published
Keywords:Airborne Lidar, Water Vapour Observations, Stratospheric Intrusions.
Event Title:Second THORPEX Int. Science Symposium
Event Location:Landshut
Event Type:international Conference
Event Dates:2006-12-06
Organizer:WMO/THORPEX
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 - Vorhaben LIDAR-Forschung und -Entwicklung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Dr.rer.nat. Christoph Kiemle
Deposited On:05 Jul 2007
Last Modified:12 Dec 2013 20:25

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