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]
2 LOEMI - Laboratoire d'Opto-électronique et de Micro-Informatique
3 SPACE - LATMOS
4 STRATO - LATMOS
5 DSO - Direction des Systèmes d'Observation [Toulouse]
6 CNRM - Centre national de recherches météorologiques
7 OAMP - Observatoire Astronomique de Marseille Provence

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.

Domaines: Physique Atmosphérique et Océanique [physics.ao-ph]; Climatologie; Milieux et Changements globaux; Météorologie

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⟩