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Water vapouR ANalyzer (WARAN): compact airborne hygrometer for the upper troposphere

Kaufmann, Stefan and Voigt, Christiane and Mallaun, Christian and Wirth, Martin and Minikin, Andreas and Friedrich, Alexander and Schäuble, Dominik and Gierens, Klaus and Schlager, Hans and Schumann, Ulrich (2011) Water vapouR ANalyzer (WARAN): compact airborne hygrometer for the upper troposphere. DPG Frühjahrstagung 2011, 13.-18. März 2011, Dresden.

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Abstract

Numerical weather prediction and climate models require a broad set of atmospheric measurement data to stick close to reality. While important meteorological data like e.g. emperature are provided by commercial aircraft connected to the AMDAR network (Aircraft Meteorological DAta Relay), humidity data of the upper troposphere are rare. In order to evaluate the suitability of humidity sensors to be integrated in the AMDAR network, we tested the WARAN (WAter vapoR ANalyzer) tuneable diode laser (TDL) hygrometer (WVSS-II from Spectrasensors Inc.) in the laboratory and on the Falcon 20E research aircraft with a Rosemount inlet system. Atmospheric water vapour measurements with the WARAN on the Falcon covering a range from less than 20 to 20000 ppmv are compared to the aircraft meteorological instrumentation. In addition, we show results from an intercomparison to humidity data with the LIDAR (light detection and ranging) instrument onboard the new German research aircraft HALO. In particular, we investigate the humidity in cirrus clouds and in cloud free conditions. The results suggest that the WARAN can provide reliable humidity data from ground level up to the upper troposphere.

Document Type:Conference or Workshop Item (Poster)
Title:Water vapouR ANalyzer (WARAN): compact airborne hygrometer for the upper troposphere
Authors:
AuthorsInstitution or Email of Authors
Kaufmann, StefanStefan.Kaufmann@dlr.de
Voigt, ChristianeUNSPECIFIED
Mallaun, ChristianUNSPECIFIED
Wirth, MartinUNSPECIFIED
Minikin, AndreasUNSPECIFIED
Friedrich, AlexanderUNSPECIFIED
Schäuble, DominikUNSPECIFIED
Gierens, KlausUNSPECIFIED
Schlager, HansUNSPECIFIED
Schumann, UlrichUNSPECIFIED
Date:2011
Keywords:water vapor, tunable diode laser, hygrometer
Event Title:DPG Frühjahrstagung 2011
Event Location:Dresden
Event Type:Conference
Event Dates:13.-18. März 2011
Organizer:DPG e.V.
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Flight Operations > Flight Facility Oberpfaffenhofen
Deposited By: Stefan Kaufmann
Deposited On:09 Feb 2012 17:29
Last Modified:09 Feb 2012 17:29

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