Steinkimmen STE

53°3‘ N / 8° 28‘ E

Altitude: 29 m a.s.l.

Tower height: 298 m

Measurements of CO2, CH4, N2O and CO are made on the Steinkimmen tower at five heights (32 m, 82 m, 127 m, 187 m, 252 m). Each height is sampled sequentially for the duration of 5 minutes.

Measurements of CO2 and CH4 are performed by a Picarro G2301 analyser using cavity ring-down spectroscopy (CRDS). N2O and CO are measured by a Los Gatos LGR 30-EP analyser.

Furthermore, radon concentrations are also monitored at the Steinkimmen tower. Additionally C14 samples are collected and sent to the Radiocarbon Laboratory for analysis (http://www.icos-infrastruktur.de/en/icos-d/komponenten/labore/radiokohlenstofflabor-heidelberg/). Radon provides useful information about the vertical mixing of the atmosphere, which helps to improve inverse modelling. The 14C isotope is an indicator of the proportion of fossil fuels in CO2.

The following instrumentation is used to record the meteorological parameters at the five sampling heights and on an additional structure at a height of 2.5 m:

• Air temperature and humidity: Vaisala HMP155
• Wind direction and speed: Thies Ultrasonic Anemometer 2D UA2D
• Precipitation: Eigenbrodt RS85
• Air pressure: Vaisala PTB330
• Global radiation: Kipp & Zonen CM6B

These data are supplied on a continuous basis at a time resolution of 1 minute.
Data can be downloaded from the ICOS Carbon Portal: https://www.icos-cp.eu/