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SCOUT-O3 BALLOON/SONDES CAMPAIGN NIAMEY 26 JULY- 26 AUGUST 2006 J. P. Pommereau, A. Garnier

SCOUT-O3 BALLOON/SONDES CAMPAIGN NIAMEY 26 JULY- 26 AUGUST 2006 J. P. Pommereau, A. Garnier and SCOUT-O3 team. Objectives: Convective transport across tropopause associated to MCS Chemistry, dehydration, microphysics in TTL. Nighttime MCS (remote). 20 km. Slow descent (in situ). 10 km.

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SCOUT-O3 BALLOON/SONDES CAMPAIGN NIAMEY 26 JULY- 26 AUGUST 2006 J. P. Pommereau, A. Garnier

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  1. SCOUT-O3 BALLOON/SONDES CAMPAIGN NIAMEY 26 JULY- 26 AUGUST 2006 J. P. Pommereau, A. Garnier and SCOUT-O3 team Objectives: Convective transport across tropopause associated to MCS Chemistry, dehydration, microphysics in TTL

  2. Nighttime MCS (remote) 20 km Slow descent (in situ) 10 km 0 km Balloons Flight permissions required CNES test flight Niamey, Nov 05

  3. Type of Balloon Flights (1/3) Type 1: Water vapour (in situ) µSDLA (H2O, CH4), LABS (BKS, depolar), µDirac (tracers, VSLS) 12 SF balloon, ascent in the afternoon to 25 km, slow nighttime descent 2m/s down to 13.5 km + large parachute 3 Flights: nighttime, 2 MCS, 1 non convective as reference Type 2: Ice and aerosols (in situ) OPC (size distribution), LABS (BKS, depolar), µDirac (tracers) 5 SF balloon, launch at anytime, ascent to 23 km, slow descent 2 m/s down to 13.5 km, 2 Flights: anytime, next to MCS

  4. Type of Balloon Flights (2/3) Type 3: Anvils and Cirrus (remote) µlidar (cirrus, anvil), IR Radiometer (brightness temp), SAOZ (H2O, cirrus, O3, NO2 et sunset), AIRS (electric field, lightning and blue-jet flashes) 3 SF balloon, ascent in the afternoon to 22-24 km, overnight flight as long as possible 3 Flights: nighttime MCS Type 4: Chemistry SAOZ-N (O3, NO2), SAOZ-UV (BrO), µDirac (Tracers and VSLS organic), NILUCUBE (Photolysis rates) 10 ZL balloon, afternoon launch, ascent to 30 km, end after sunsetdown 2 Flights: daytime, MCS outflow

  5. Type of Balloon Flights (3/3) UWyo (NSF funded flight, operated by Uwyo + help CNES) Double OPC + ozone sonde 4000 m3 Raven balloon, ascent / descent 33 km 1 Flight: anytime

  6. Niamey-Ouaga = 400 km 200 km Ascent / descent: <100 km recovery in Niger (Type 4, 5 and Wyo) Slow descent: 200 km in Burkina (Type 1, 2) Overnight float: up to 300 km in Burkina (Type 3)

  7. Planning 17-24 July: installation 24-29 July: Ice and aerosol 1, Water vapour 1, UWyo 31-July-5 Aug: Chemistry 1, Anvil and cirrus 1 7-12 Aug: Water vapour 2, Ice and aerosol 2 14-19 Aug: Anvil and cirrus 2, Chemistry 2, Chemistry/transport TBC) 21-26 Aug: Water vapour 3, Anvil and cirrus 3 - 1 week for recovery and repair between 2 flights of same instrument - Date of flights highly dependent on meteorology

  8. SCOUT-AMMA sondes programme • up to 15 heavy sondes on Raven 1500 m3 balloons (about 30 km ascent/descent), 10kg, flight permission required • Backscatter sondes + ECC ozonesondes + Flash Lyman alpha hygrometer + GPS / ARGOS for location and recovery (recovery if possible) • 20 ECC ozonesondes, RS92 H-Humicap • Operations: DMI / CNRS / CAO Ozone sondes near and between MCS Nightime only for BKS and Flash Flights in parallel to balloons, Link with ARM soundings ? SCOUT sondes launch time, transmission frequency Coord. with Tower at civil airport ?

  9. Flight decision strategy From Day-3 : AOC Web site (levels up to 50 hPa), ARM, MCS prediction, speed, local time D-1: 11h30 to 12h00 CNES Met Briefing, military airport Balloon and sonde flight option(s) for D0 Science, Simulations of balloon trajectories from ECMWF (CNES) NOTAM after briefing Safety : population density Recovery to be organized D0 11h30 to 12h00 CNES Met Briefing, military airport Balloon and sonde flight confirmation for D0 afternoon-early evening MSG(15 min) + MCS tracking, ARM RS Surface wind and rain prediction Update of trajectory prediction D0 launch time – 2 to 3h (1h for sondes) Decision of attempt Radar, MCS tracking, surface wind, rain Final Met briefing Deployment of equipment on the field H-20’: Decision of inflation (irreversible)

  10. Objectives: Convective transport across tropopause associated to MCS Chemistry, dehydration, microphysics in TTL

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