Flight plans TT8 document - available on the web: env/leeds.ac.uk/~doug/tt8/

1. Flight plans TT8 document - available on the web: http://www.env/leeds.ac.uk/~doug/tt8/

2. Dakar Ouagadougou Niamey ? D/F20 Niamey ? Geophysica (M55) Dakar ?

3. M55 – 3 local flights funded and 1 from CNES, but relying on EUFAR funding – decision end April. Hangar renovation v. expensive so now local AMMA rep negotiating. If Ouaga is a NoGo – Niamey is not an alternative Dakar could be revisited (logistically and scientifically) but time is short. Visit to Oauga in April – involving Jan. If Geophysica does not go to Ouaga, can D/F20 go to Niamey ? Same number of aircraft as in SOP2a1 for military hangar – but people (15) / offices may be a problem.

4. ATR – some EMC checks and test flying of instruments has taken place – continuing through April and May Permission to fly only below 10,000ft, and not in turbulence . F/F20 – EMC tests in progress. Chemistry to be installed and test through April, then role change for first AMMA deployment. Communication with scientists on Falcon. Currently the only way is through the pilots. Communication with ATC in W. Africa during SOP0 was often difficult.

8. SOP1-a, SOP2-a1 I1.1: Inter-tropical front and heat low surveys F/F20, ATR, D/F20

9. SOP1-a, SOP2-a1 I1.2: Surface-atmosphere-aerosol: Squall-line relatedaerosol emissions surveys F/F20, ATR

10. SOP1-a, SOP2-a2 I1.3: North-South ‘land-ocean-atmosphere interactions’ surveys F/F20, ATR, 146

11. 24 kft / FL240 ~ 400 hPa 45 min ~ 270 km 24 mins @ 1000 ft/min ~ 1 hour ~ 5,000 ft ~ 5,000 ft ~ 20 mins 500 ft 45 min ~ 270 km Flight duration excluding transits: 3h 34mins SOP2-a2 I1.4: Surface-atmosphere: Land-atmosphere interactions 146

12. SOP2-a2 I1.5: Surface-atmosphere: Land-atmosphere interactions 146

13. SOP2-a2 I1.6: Surface-atmosphere: Land-atmosphere interactions 146, D/F20

14. SOP2-a2 I1.7: Aerosol mixing and hygroscopicity ATR

15. SOP2-a2, SOP2-a1 I2: Dynamics and Chemistry of MCSs F/F20, ATR, D/F20, M55, 146

16. SOP2-a2 I2: Dynamics and Chemistry of MCSs F/F20, ATR, D/F20, M55, 146 T = time that MSC is in target area – Niamey or Djougou regions Take off times F/F20 T-2h – 1 flight M55 T-2h – 1 flight D/F20 T-1h – 1 flight (focus on anvil) ATR and 146 – 2 flights: 1 before and 1 after the MCS Do we need both the 146 and ATR to fly before and after ? ATR limited to day light flying –so only 146 if dark Prefer daylight for photochemistry and Djougou ATR will need 3 flights and refuel at Niamtougou for Djougou Need to create some time lines for different times of T. 146 will try to combine these flights with I1.4

17. SOP2-a2 I3.1: Impact of MCSs on TTL composition D/F20, M55 Similar to I2 but looking at outflow further away from the MCSs If possible D/F20 and M55 would target outflow from an MCS that had picked up air from an area sampled by other aircraft on a previous day.

18. SOP2-a2 I3.2: Large scale impacts of deep convection on LRT F/F20, D/F20, M55, 146 Large scale outflow in between MCSs 146 will focus on mid level flow (AEJ) Other aircraft at higher altitudes N-S transects Aim to fly on the same day along the same meridian or parallel displaced by longitude M55 flight coordinated with the CALIPSO over pass (13:00).

19. SOP2-a2 I?: CALIPSO over pass M55 M55 flight coordinated with the CALIPSO over pass (13:00).

20. SOP2-a3 I4.1: Horizontal microphysical variability of MCS anvils F/F20

21. SOP2-a3 I4.2: Vertical microphysical variability of MCS anvils F/F20

22. SOP2-a2 I6: Intercomparison F/F20, ATR, D/F20, M55, 146 D/F20, M55 D/F20, 146 – pre-flight briefing between pilots 146, ATR 146, F/F20 – HCHO, dropsondes, link between ATR and F/F20 ATR, F/F20 – do pilots have experience in formation flying ? Chemistry - 15 minute runs at 3 altitudes in clear air Dynamics – into, with and across wind