GeoBasis Nuuk - Fluxmonitoring - EddyFen

The EddyFen station measures carbon dioxide fluxes via eddy covariance method in a low Arctic fen site (40 m.a.s.l) close to InteractFen (Meteorology, Soil Properties, Snow Properties; 2011-) and SoilFen (Meteorology, Soil Properties; 2007-) and the former station AutochambersFen (Flux Monitoring; 2007-2021). The station was established in 2007 and originally instrumented with a LI7000 CO2/H2O analyzer and Gill 1210R3 sonic anemometer (2007-2018). In 2018 the station was relocated a few meters and upgraded with a LI7200RS closed-path gas analyzer and a SmartFlux2 processing system (2018-). Due to the relocation in 2018, the CO2 flux time series are divided into two datasets (pre-2018 and post-2018). This dataset contains quality-controlled fluxes of CO2, LE and H; wind speed and -direction from 2007-2018. The station was logging at a frequency of 20 Hz and data are aggregated as 30-minute averages (UTC-3 West Greenlandic Winter Time). Data were collected only during the summer field season (approximately May–October) due to winter power limitations. Post-2018 time series containing CO2 flux data is available under the dataset under "EddyFen_2018-". Fluxmonitoring:Fluxmonitoring GeoBasis Nuuk:The GeoBasis monitoring programme focuses on selected abiotic characteristics in order to describe the state of Greenlandic terrestrial environments and their potential feedback effects in a changing climate. Monitored plot data is up-scaled to a landscape level and is used to improve ecosystem models to be able to quantify these feedback mechanisms. The GeoBasis programme provides an active response to recommendations in international assessments such as ACIA and SWIPA; and is continuously being adapted based on AMAP and other international founded recommendations. Furthermore, the GeoBasis programme is directly involved in several international networks and research projects (e.g. the Circumpolar Active Layer Monitoring (CALM) programme, the Nordic Centre of Excellence DEFROST, the Danish Centre of Excellence CENPERM, the EU-projects PAGE21 and INTERACT, and the Arctic Research Centre at Aarhus University). The GeoBasis programme is divided into a number of sub-groups, including: