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- forecasting support- wind profiler- Ceilometer- Radiosonde soundings- Surface flux station- drifting balloons- Piper Aztec Flights

Forecasting supportForecasting support

• Weather forecasts from the operational service of MF- summary of the situation of the day delivered on the website- forecaster present at the morning briefing (& evening if IOP)- Aladin outputs at D+1, D+2, D+3

• Aladin outputs to force the STILT model (10 km, 72H)• trajectories and back-trajectories from Aladin• Available MesoNH outputs :

- horizontal wind (at 500m and 10m)- mixing heights of BL- vertical profiles in BISCAROSSE, CS, MARMANDE (, TKE, wind)- vertical cross-section of mixing ratio for cloud/vapor

Configuration : 2 nested models (240x240km at 8km and 60x60km at 2km)Beginning of the simulation with ALADIN forecast (10km) at D+ 27hTU End of the simulation : D+42h TU (8 km and 2km)

Wind profilerWind profiler

• Location : La Cape Sud (agricultural buildings)

• Continuous dataset from 05/18 to 05/25 (14 UTC) and 06/02 to 06/23

• Low mode configuration : profiles of wind speed and direction between 0- 2500m

Wind profilerWind profiler

RS at La Cape Sud : 11UTC

Wind direction (°)

Wind speed (m/s)

0° 180° 360°

0m/s 5m/s 10m/sdirection

speed

IOP5 : Wednesday 15 June 2005

CeilometerCeilometer• Useful to follow the Atmospheric Boundary Layer development

<1500m in conditions of high specific humidity• Deduced from sharp transitions in the profile of backscattered

signal, related to the difference in aerosol and /or water vapor concentrations between the BL height and the overlying free troposphere

• Example of June 19 : maritime entrances in the morning

RS La Cape Sud 17 UTC

1000m

2000m

3000m

zi

Radiosonde soundings Radiosonde soundings

• Performed during IOP : 5, 8, 11, 14, 17, 23UTC• In La Cape Sud : 96 with 5 to 6 per IOP day • In Toulouse : 16 at 11 UTC• Well-mixed and well developed ABL / strong

nocturnal inversion ( 10K/200m)- max : 2000m on 05/27 & 2300m on 06/18

Saturday 18 June 5 UTC and 14 UTCLa Cape Sud

Surface fluxes stationsSurface fluxes stations

- Le Fauga (south of Toulouse)

- Saint Sardos (North East of Toulouse)

- La Cape Sud (les Landes)

Surface fluxes stationSurface fluxes station

- Le Fauga: fallow

measurements : meteorological parameters, profiles of soil water content and soil temperature,- Soil density, LAI, CO2 flux and energy balance- radiometer IR

Profiles of soil temperatures between 06/13 and 06/21 at :- 1m- 5m- 20m- 50m- 90m

Surface fluxes stationSurface fluxes station

- Saint Sardos : maize field

- measurements at 2m: meteorological parameters, profiles of soil water content and soil temperature,-Soil density, LAI, CO2 flux and energy balanceW

/m²

Saint Sardos – 27 May 20050H00- 23H59 UTC

LeHsGRn

Surface fluxes station : Surface fluxes station : EC and REA systems EC and REA systems

• La Cape Sud : beans field• Eddy Correlation system at

2m • Continuous measurements

from 05/15 to 06/23• Meteo parameters, soil

water content and temperature, LAI and biomass

• CO2, sensible and latent heat fluxes, momentum

+ Ozone fluxes (INRA)

Surface fluxes stationSurface fluxes station

• La Cape Sud : beans field• Relaxed Eddy Accumulation

system at 2m • Continuous measurements

from 05/15 to 06/23

• CO2, NOx and latent heat fluxes

for CO2 : Li6262

for NOx : TEI 42 CTL

• In addition : NO soil emissions (performed by Laboratoire d’Aérologie)

Saturday 06/11

Drifting Balloons Drifting Balloons

• Operated by the National Spatial Agency (CNES)

• See presentation of G. Facon

Aircraft operationsAircraft operations

See presentation from SAFIRE …