Met stations at 10, 50 and 100 m

In order to characterize the weather conditions at ICOS atmospheric sites, ICOS requires continuous monitoring of key meteorological parameters: wind direction, wind speed, air temperature, relative humidity, and barometric pressure. The selection of meteorological sensors follows the recommendations outlined in the WMO Guide N° 8 (Table 5) (WMO, 2008), ensuring compliance with international standards for atmospheric observations.

Three meteorological stations have been installed on the ICOS tower at heights of 10, 50, and 100 meters, providing vertical profiles of the required parameters. These stations are equipped with high-accuracy Vaisala instrumentation:

·         100 m-50 m: Vaisala DMU801 data logger with HMP155 (temperature and humidity), VMT700 (wind speed and direction), and Baro-1 Class A pressure sensor

·         10 m: Vaisala AWS310 system with HMP155 and VMT700 sensors

This configuration ensures high-quality meteorological data across the vertical column, supporting the interpretation of greenhouse gas measurements and enabling robust analysis of transport, dispersion, and mixing processes. The integration of these sensors is essential for validating atmospheric models and for understanding the dynamics that influence concentration gradients observed at the site.