CEOP Reference Site Description
1D Site:
Near surface + surface + sub-surface (Atmospheric sounding* is highly desirable)
2.5D Site:
A few 1D sites + surface heterogeneity with an area of at least 100km2
3D Site:
1D sites network (+3D system) or 2.5D site + 3D atmosphere** with an area of about 104 km2
The terminology in summarizing these sites is used in the following manner:
- Sub-surface (0 to -1m): Soil moisture and temperature profile, heat conduction and soil characteristics;
- Surface (0 to +2m): Four-component radiation, PAR, surface temperature, surface soil moisture,
precipitation, vegetation type characteristics, snow;
- Near surface(+2 to +10m): Temperature, specific humidity and wind speed profiles, surface pressure,
momentum, latent and sensible heat fluxes;
* Atmospheric soundings: Radiosonde, wind profile, LIDAR microwave rain radar
**3D atmosphere: 3D Doppler radar, cloud radar, aerosonde aircraft.