Strateole 2 workshop March 18-19, 2015 Location : Amphitheater of ‘Institut de Physique du Globe de Paris’, 1 rue Jussieu, Paris (metro station : M10 Jussieu) March 18 Welcome and introductive presentation 9:00 – 9:10 Welcome 9:10 – 9:25 Strateole 2 status and schedule (Ph. Cocquerez) 9:25 – 9:50 Strateole 2 balloon and system (S. Venel) 9:50 – 10:15 Strateole 2 science and workshop objectives (A. Hertzog) 10:15 – 10:30 Discussion on Strateole 2 implementation and workshop objectives 10:30 – 10:50 Coffee break Transport session 10:50 – 11:10 Overview talk Processes affecting variability of water vapour and ozone in the tropical lowermost stratosphere (S. Davis) 11:10 – 11:25 UCOZ and B-Bop ozone instrument (F. Danis) 11:25 – 11:40 Measurements of other tracers in Strateole 2 (G. Durry) 11:40 – 11:55 Accuracy of ECMWF and MERRA analyses in the deep tropics (R. Plougonven) 11:55 – 12:15 Discussion on transport studies within Strateole 2 12:15 – 14:00 Lunch Aerosol session 14:00 – 14:20 Overview talk Challenges associated with ice and large particles in the TTL (T. Deshler) 14:20 – 14:35 Measurements of stratospheric aerosols with the LOAC (Light Optical Aerosol Counter) Instrument (J.-B. Renard) 14:35 – 14:50 Pico-Lidar for Strateole 2 (F. Fierli) 14:50 – 15:10 Discussion on aerosol studies within Strateole 2 15:10 – 15:30 Break Water vapour and dehydration session 15:30 – 15:50 Overview talk Seasonal variability of the tropical tropopause dehydration (H. Vömel) 15:50 – 16:05 Pico SDLA –H2O for Strateole 2 (G. Durry) 16:05 – 16:20 SAWfPHY: a frost-point hygrometer for long-duration balloon flights (D. Sourgen) 16:20 – 16:35 The SERB instrument for radiative fluxes observations (A. Hauchecorne) 16:35 – 16:50 A study of dehydration, hydration and horizontal transport in the tropical UT/LS from high-resolution in situ observations (S. Khaykin) 16:50 – 17:05 Fine vertical structure of tropical waves derived from radiosondes and relationships to dehydration (J. Alexander) 17:05 – 17:20 Role of small-scale fluctuations in influencing ice crystal numbers in cirrus clouds (A. Podglajen) 17:20 – 17:40 Discussion on water vapour and dehydration within Strateole 2 Group dinner at 19:00 in Restaurant “L’entrepôt”, 7 rue Francis de Pressensé, Paris (Metro Station : M13 Pernety) March 19 Dynamics and Satellite validation 9:00 – 9:20 Overview talk Multi-scale dynamics in the TTL (Th. Birner) 9:20 – 9:35 In situ measurement of temperature, pressure and winds (A. Hertzog) 9:35 – 9:50 Status of the NCAR driftsonde system (H. Vömel) 9:50 – 10:05 GPS radio-occultation on long-duration balloon (J. Haase) 10:05 – 10:20 Fiber optic measurements of air temperature during Strateole 2 (L. Kalnajs) 10:20 – 10:35 Equatorial Atmosphere Radar observations over the Indonesian Maritime Continent (R. Wilson) 10:35 – 10:55 Break 10:55 – 11:10 Response of superpressure balloons to gravity waves and retrieval of wave characteristics (R. A. Vincent) 11:10 – 11:25 Stochastic gravity-wave drag parameterizations in LMDz GCM (A. de la Cámara) 11:25 – 11:40 Resolved and parameterized waves in a simulation of the QBO with CAM5 (A. Solomon) 11:40 – 11:55 Statistical study of short period fluctuations (GW & turbulence) using the balloons and the gondolas as in-situ sensors (F. Dalaudier) 11:55 – 12:10 Studying deep convection in the tropics and validating satellite data during Strateole 2 (J. Wang) 12:10 – 12:25 Overview of EUMETSAT's operational IASI L2 products and their validation (T. Hultberg) 12:25 – 14:00 Lunch 14:00 – 14:15 YMC overview of planned observations and modeling: possible synergies with Strateole 2 (G. Mullendore) 14:15 – 14:30 Short reports on recent YMC and ADM/Aeolus workshops (J-Ph. Duvel and A. Hertzog) 14:30 – 14:45 Request process for US participants (B. Baeuerle) 14:45 – 18:00 General Discussion on the dynamics, NWP and satellite validation session and on the workshop outcomes and actions