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Validation of the Water Vapor Profiles of the Raman Lidar at the Maïdo Observatory (Reunion Island) Calibrated with Global Navigation Satellite System Integrated Water Vapor

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Laboratoire de l’Atmosphère et des Cyclones, UMR8105 (CNRS, Université de La Réunion, Météo-France), 97490 Saint-Denis de La Réunion, France
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Observatoire des Sciences de l’Univers de La Réunion, UMS3365, 97490 Saint-Denis de La Réunion, France
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Laboratoire ATmosphères, Milieux, Observations Spatiales-IPSL, UMR8190 CNRS, UVSQ, UPMC, 78280 Guyancourt, France
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Laboratoire de Météorologie Physique, UMR6016, Observatoire de Physique du Globe de Clermont-Ferrand, Université Clermont Auvergne, 63178 Clermont-Ferrand, France
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Deutscher Wetterdienst, Meteorological Observatory Lindenberg, 15848 Lindenberg, Germany
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ENSTA Bretagne – Lab-STICC UMR CNRS 6285—PRASYS Team, 29200 Brest, France
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(11), 713; https://doi.org/10.3390/atmos10110713
Received: 11 October 2019 / Revised: 8 November 2019 / Accepted: 12 November 2019 / Published: 15 November 2019
The Maïdo high-altitude observatory located in Reunion Island (21° S, 55.5° E) is equipped with the Lidar1200, an innovative Raman lidar designed to measure the water vapor mixing ratio in the troposphere and the lower stratosphere, to perform long-term survey and processes studies in the vicinity of the tropopause. The calibration methodology is based on a GNSS (Global Navigation Satellite System) IWV (Integrated Water Vapor) dataset. The lidar water vapor measurements from November 2013 to October 2015 have been calibrated according to this methodology and used to evaluate the performance of the lidar. The 2-year operation shows that the calibration uncertainty using the GNSS technique is in good agreement with the calibration derived using radiosondes. During the MORGANE (Maïdo ObservatoRy Gaz and Aerosols NDACC Experiment) campaign (Reunion Island, May 2015), CFH (Cryogenic Frost point Hygrometer) radiosonde and Raman lidar profiles are compared and show good agreement up to 22 km asl; no significant biases are detected and mean differences are smaller than 9% up to 22 km asl. View Full-Text
Keywords: Raman lidar; water vapor; calibration; GNSS IWV; Maïdo Observatory; Reunion Island Raman lidar; water vapor; calibration; GNSS IWV; Maïdo Observatory; Reunion Island
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Vérèmes, H.; Payen, G.; Keckhut, P.; Duflot, V.; Baray, J.-L.; Cammas, J.-P.; Evan, S.; Posny, F.; Körner, S.; Bosser, P. Validation of the Water Vapor Profiles of the Raman Lidar at the Maïdo Observatory (Reunion Island) Calibrated with Global Navigation Satellite System Integrated Water Vapor. Atmosphere 2019, 10, 713.

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