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Accuracy of Water Vapor Observations from in-situ and Remote Sensing Techniques: First Results from the DEMEVAP 2011 Campaign

Olivier Bock 1 K. Pipis 1 P. Bosser 1 C. Thom 2 Jacques Pelon 3 Philippe Keckhut 4 Christophe Hoareau 4 Alain Sarkissian 4 T. Bourcy 5 G. Poujol 5 D. Tzanos 6 G. Tournois 7
1 LAREG - LAboratoire de REcherche en Géodésie [Paris]
LaSTIG - Laboratoire des Sciences et Technologies de l'Information Géographique
2 LOEMI - Laboratoire d'Opto-électronique et de Micro-Informatique
LaSTIG - Laboratoire des Sciences et Technologies de l'Information Géographique
3 SPACE - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
4 STRATO - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
Abstract : The accuracy of water vapour observations from four different operational radiosonde types (Vaisala RS92, MODEM M2K2-DC and M10, and Meteolabor Snow- White) flows simultaneously on the same ballon are intercompared and compared to GPS and Raman lidar measurements during the DEMEVAP 2011 experiment. The RS92 and Snow-White sondes show a slight moist bias at night-time compared to GPS, while the MODEM sondes show a dry bias. The IGNLATMOS Raman lidar water vapour measurements are well consistent with RS92. Raman lidar calibration factors determined from RS92 and capacitive humidity sensors achieve stabilities of 2% and 3-5% respectively. They detect a change in the lidar calibration during the experiment which is not explained yet.
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Olivier Bock, K. Pipis, P. Bosser, C. Thom, Jacques Pelon, et al.. Accuracy of Water Vapor Observations from in-situ and Remote Sensing Techniques: First Results from the DEMEVAP 2011 Campaign. 9th International Symposium on Tropospheric Profiling (ISTP), Sep 2012, L'Aquila, Italy. 4 p. ⟨hal-00740464⟩

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