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The Water Vapour Intercomparison Effort in the Framework of the Convective and Orographically-Induced Precipitation Study: Airborne-to-Ground-based and airborne-to-airborne Lidar Systems

Bhawar, Rohini and DiGirolamo, Paolo and Summa, Donato and Flamant, Cyrille and Althausen, Dietrich and Behrendt, Andreas and Kiemle, Christoph and Bosser, P. and Cacciani, M. and Champollion, C. and Di Iorio, T. and Engelmann, R. and Herold, C. and Müller, D. and Pal, S. and Wirth, Martin and Wulfmeyer, V. (2011) The Water Vapour Intercomparison Effort in the Framework of the Convective and Orographically-Induced Precipitation Study: Airborne-to-Ground-based and airborne-to-airborne Lidar Systems. Quarterly Journal of the Royal Meteorological Society, 137, pp. 325-348. Wiley. DOI: 10.1002/qj.697.

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Abstract

An intensive water vapour intercomparison effort, involving airborne and ground-based water vapour lidar systems, was carried out in the framework of the COPS experiment. The main objective of this paper is to provide accurate error estimates for these systems. Comparisons between the ground-based Raman lidar BASIL and the airborne CNRS DIAL indicate a mean relative bias between the two sensors, calculated with respect to the mean value of -2.13% (-0.034 g/kg) in the altitude region 0.5�3.5 km, while comparisons between BASIL and the airborne DLR DIAL lead to a mean relative bias of 1.87% (0.018 g/kg) in this same altitude region. Comparisons between the ground-based UHOH DIAL and the CNRS DIAL indicate a bias of - 3.2% (-0.37x1022 m-3) in the altitude range 1.5-4.5 km, while comparisons between the UHOH DIAL and the DLR DIAL indicate a bias of 0.83% (0.06x1022 m-3) in this same altitude range. Based on the available comparisons between the ground-based Raman lidar BERTHA and the CNRS DIAL, the mean relative bias is found to be -4.37% (-0.123g/kg) in the altitude region 0.5�4.5 km. Comparisons between the ground-based IGN Raman lidar and the CNRS DIAL indicate a bias of 3.18% (0.55 g/kg) in the altitude range from 0.5-4.5 km, while comparisons between the CNRS DIAL and DLR DIAL result in a mean relative bias of 3.93% (1.1x1022 m-3) in the altitude interval 0.5-4.0 km. Based on the available statistics of comparisons, benefiting from the fact that the CNRS DIAL was able to be compared with all other lidar systems, and putting equal weight to the data reliability of each instrument, overall relative values for BASIL, BERTHA, IGN Raman lidar, UHOH DIAL, DLR DIAL, and CNRS DIAL, with respect to the mean value, are found to be -0.38, -2.60, 4.90, -1,43, -2.23 and 1,72%, respectively.

Document Type:Article
Title:The Water Vapour Intercomparison Effort in the Framework of the Convective and Orographically-Induced Precipitation Study: Airborne-to-Ground-based and airborne-to-airborne Lidar Systems
Authors:
AuthorsInstitution or Email of Authors
Bhawar, RohiniUni Potenza
DiGirolamo, PaoloUni Potenza
Summa, DonatoUni Potenza
Flamant, CyrilleCNRS UPMC
Althausen, DietrichIFT Leipzig
Behrendt, AndreasUni Hohenheim
Kiemle, ChristophDLR IPA
Bosser, P.DPTS, Marne-La-Vallee, F
Cacciani, M.Uni degli Studi di Roma, Rome, I
Champollion, C.CNRS UPMC
Di Iorio, T.Uni degli Studi di Roma, Rome, I
Engelmann, R.IFT Leipzig
Herold, C.IFT Leipzig
Müller, D.IFT Leipzig
Pal, S.Uni Hohenheim
Wirth, MartinDLR IPA
Wulfmeyer, V.Uni Hohenheim
Date:2011
Journal or Publication Title:Quarterly Journal of the Royal Meteorological Society
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:137
DOI:10.1002/qj.697
Page Range:pp. 325-348
Publisher:Wiley
Status:Published
Keywords:water vapour, DIAL, Raman lidar, bias, root-mean square deviation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Dr.rer.nat. Christoph Kiemle
Deposited On:06 Dec 2010 14:43
Last Modified:12 Dec 2013 21:06

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