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Validation of IIR/CALIPSO Level 1 Measurements by Comparison with Collocated Airborne Observations during CIRCLE-2 and Biscay ‘08 Campaigns

Sourdeval, Odran und Brogniez, Gerard und Pelon, Jacques und Labonnote, Laurent C. und Dubuisson, Philippe und Parol, Frédéric und Josset, Damien und Garnier, Anne und Faivre, Michael und Minikin, Andreas (2012) Validation of IIR/CALIPSO Level 1 Measurements by Comparison with Collocated Airborne Observations during CIRCLE-2 and Biscay ‘08 Campaigns. Journal of Atmospheric and Oceanic Technology, 29 (5), Seiten 653-667. DOI: 10.1175/JTECH-D-11-00143.1.

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Offizielle URL: http://journals.ametsoc.org/doi/pdf/10.1175/JTECH-D-11-00143.1

Kurzfassung

In the frame of validation of the spatial observations from the radiometer IIR on board CALIPSO, the two airborne campaigns Cirrus Cloud Experiment (CIRCLE)-2 and Biscay ‘08 took place in 2007 and 2008 in the western part of France, over the Atlantic Ocean. During these experiments, remote sensing measurements were made over cirrus clouds, right under the track of Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) in space and time collocation. For this purpose, a Falcon-20 aircraft was equipped with the Lidar pour l’Etude des Interactions Aèrosols Nuages Dynamique Rayonnement et du Cycle de l’Eau (LEANDRE)-New Generation (NG) and the thermal infrared radiometer Conveyable Low-Noise Infrared Radiometer for Measurements of Atmosphere and Ground Surface Targets (CLIMAT)-Airborne Version (AV), whose spectral characteristics are strongly similar to those of the infrared imaging radiometer (IIR). In situ measurements were also taken in cirrus clouds during CIRCLE-2. After comparisons, consistent agreements are found between brightness temperatures measured by CLIMAT-AV and IIR. However, deviations in the brightness temperature measurements are still observed, mainly in the 8.6-mm channels. Simulations using a radiative transfer code are performed along a perfectly clear-sky area to show that these dissimilarities are inherent in slight differences between the spectral channels of both radiometers, and in differences between their altitudes. Cloudy and imperfectly clear areas are found to be harder to interpret, but the measurements are still coherent by taking into account experimental uncertainties. In the end, IIR measurements can be validated unambiguously.

Dokumentart:Zeitschriftenbeitrag
Titel:Validation of IIR/CALIPSO Level 1 Measurements by Comparison with Collocated Airborne Observations during CIRCLE-2 and Biscay ‘08 Campaigns
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Sourdeval, OdranUniv. de Lille, Villeneuve d’Ascq, F
Brogniez, GerardUniv. de Lille, Villeneuve d’Ascq, F
Pelon, JacquesUniv. Pierre et Marie Curie, Paris, F
Labonnote, Laurent C.Univ. de Lille, Villeneuve d’Ascq, F
Dubuisson, PhilippeUniv. de Lille, Villeneuve d’Ascq, F
Parol, FrédéricUniv. de Lille, Villeneuve d’Ascq, F
Josset, DamienUniv. Pierre et Marie Curie, Paris, F
Garnier, AnneUniv. Pierre et Marie Curie, Paris, F
Faivre, MichaelUniv. Pierre et Marie Curie, Paris, F
Minikin, AndreasDLR
Datum:2012
Erschienen in:Journal of Atmospheric and Oceanic Technology
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:29
DOI :10.1175/JTECH-D-11-00143.1
Seitenbereich:Seiten 653-667
Status:veröffentlicht
Stichwörter:CALIPSO, CIRCLE-2
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben Atmosphären- und Klimaforschung
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Atmosphärische Spurenstoffe
Hinterlegt von: Jana Freund
Hinterlegt am:16 Jul 2012 15:58
Letzte Änderung:12 Dez 2013 21:43

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