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Validation of stratospheric water vapour measurements from the airborne microwave radiometer AMSOS

Müller, Stefan and Kämpfer, N. and Feist, D.G. and Haefele, A. and Milz, M. and Sitnikov, N. and Schiller, C. and Kiemle, Christoph and Urban, J. (2008) Validation of stratospheric water vapour measurements from the airborne microwave radiometer AMSOS. Atmospheric Chemistry and Physics, 8, pp. 3169-3183.

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Official URL: http://www.atmos-chem-phys.net/8/3169/2008

Abstract

We present the validation of a water vapour dataset obtained by the Airborne Microwave Stratospheric Observing System AMSOS, a passive microwave radiometer operating at 183 GHz. Vertical profiles are retrieved from spectra by an optimal estimation method. The useful vertical range lies in the upper troposphere up to the mesosphere with an altitude resolution of 8 to 16 km and a horizontal resolution of about 57 km. Flight campaigns were performed once a year from 1998 to 2006 measuring the latitudinal distribution of water vapour from the tropics to the polar regions. The obtained profiles show clearly the main features of stratospheric water vapour in all latitudinal regions. Data are validated against a set of instruments comprising satellite, ground-based, airborne remote sensing and in-situ instruments. It appears that AMSOS profiles have a dry bias of 0 to –20%, when compared to satellite experiments. Also a comparison between AMSOS and in-situ hygrosondes FISH and FLASH have been performed. A matching in the short overlap region in the upper troposphere of the lidar measurements from the DIAL instrument and the AMSOS dataset allowed water vapour profiling from the middle troposphere up to the mesosphere.

Document Type:Article
Title:Validation of stratospheric water vapour measurements from the airborne microwave radiometer AMSOS
Authors:
AuthorsInstitution or Email of Authors
Müller, StefanUniv. Bern, CH
Kämpfer, N.Univ. Bern, CH
Feist, D.G.MPI Jena
Haefele, A.Univ. Bern, CH
Milz, M.IMK Karlsruhe
Sitnikov, N.CAO Moskau, R
Schiller, C.FZ Jülich
Kiemle, ChristophUNSPECIFIED
Urban, J.Univ. Göteborg
Date:24 June 2008
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:8
Page Range:pp. 3169-3183
Status:Published
Keywords:stratospheric water vapour, airborne water vapour lidar, tropopause
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:20 Nov 2008
Last Modified:20 Oct 2014 14:32

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