Introduction
Table 1 below summaries the in situ and remote sensing deployed during BLLAST over the 3 sites, for continuous observation from 14 June to 8 July.
We describe here the deployment of those instruments for the observation of (1) the surface layer processes, (2) boundary layer profiling, (3) sky monitoring, and (4) Aerosol content.
| Super site 1 | Super site 2 | Site 3 | |
|---|---|---|---|
| Instrumented Towers | |||
| 60 m tower 5 levels HR, LR wind HR, LR temperature HR, LR humidity HR, LR O3 HR, LR CO2 Radiation Soil moisture IR Camera | X | ||
| Radiation Divergence 10 m tower 5 levels – radiation | X | ||
| Skin flow 4 levels HR wind HR temperature | X | ||
| 2 m towers (*#*) 1 level Soil moisture | X | ||
| 30 m tower HR, LR wind HR, LR temperature HR, LR humidity Radiation | X | ||
| Surface temperature probes network | X | X | |
| Wind profilers | |||
| VHF wind profiler | X | ||
| UHF wind profiler | X | X | |
| sodar | X | X | |
| Lidars | |||
| Aerosol Lidar | X | X | |
| Doppler Lidar | X | ||
| Humidity Profilers | |||
| Radiometer | X | ||
| Scintillometry | X | ||
| Ceilometery | X | X | |
| Full Sky Imagery | X | ||
| Microbarometry | X | ||
| Aerosols | X |
Table 1 : distribution of the continuous observation over the three sites.
The map below shows the position of the two surface super sites 1&2. Super-site 1 was especially dedicated to a thorough monitoring of the vertical structure, and super-site 2 to the surface heterogeneity study.
Figure 4: Super sites 1 and 2
Super site 1: Thorough vertical monitoring of the first 3 km of the atmosphere
- « Vertical monitoring » site
- « 60-m tower » site
- « Divergence » site
- « Edge effect » site
- « Micro-scale surface heterogeneity » site
Figure 5: Location of « Edge effect », « divergence », « 60-m tower » and Micro-scale surface heterogeneity sites on super site 1.
Super site 2: Impact of the surface heterogeneity.
- « Corn » site
- « Moor » site
- « Forest » site
 |  |
Figure 6: Surface cover types on super site 2, positioning of EC station, remote sensing and extra ground temperature probes.
Sky monitoring
Total sky A full sky camera in site 1 (LA, RAPACE instrument) will take pictures of the entire sky every one min, for qualitative monitoring of the cloud cover. Ceilometer A ceilometer from CRM/GAME will be collocated with the full sky camera, for a quantitative monitoring of the cloud base.
Boundary layer profiling
Wind profilers (sodar, UHF, VHF) At site 1, the combinaison of a sodar (MAG, measuring the wind from 10 m to 300 m a.g.l), UHF profiler (LA, measuring the wind from 200 m to 3000 m a.g.l) and a VHF profiler (LA, measuring the wind from 1.5 km to 16 km a.g.l) is covering the […]
Surface Layer
Turbulence and mean meteorological parameters In the BLLAST experiment, 9 masts will be equipped with a total of 26 instruments measuring turbulence. Measured properties are: wind, temperature, CO2 concentration and water vapour concentration. The first aim of all the stations is to get a clearer picture of the fluxes in the diverse landscape that is […]