Coordinates: N67°58.388' E24°06.914' Altitude: 565 m FMISID: 101983, WMO: 02821 Ecosystem type: Fell top/ tundra Networks: Main WMO-GAW site; https://community.wmo.int/activity-areas/gaw Main ICOS atmospheric station https://www.icos-finland.fi/

Observations

• CO2 concentration (at 7 m since 07/1998)

• CH4 concentration (at 7 m since 02/2004)

• N2O concentration (at 7 m 02/2004 – 12/2015)

• SF6 concentration (at 7 m 02/2004 – 12/2015)

• H2 concentration (at 7 m 09/2006 – 12/2014)

• CO concentration (at 7 m since 02/2004)

• CO2 flux (EC at 2.5 m since 06/2011)

• Supporting environmental data: Air temperature, air humidity, PPFD, Global radiation, soil temperature profile, soil humidity, soil heat flux, trace gases, radon, aerosol properties

Climatology

Climate data point (Sammaltunturi): FMISID: 101983, WMO: 02821 Average temperature (°C): -0.7 Annual precipitation (mm): Average snow depth at mid-March (cm): Median snow cover start date: Median snow cover end date:

Environment

Vegetation type: Shrubs Mean vegetation height (m): 0.4 Max projected LAI: <0.1 Soil type: Bare bedrock / rock field, partly covered by thin humus layer Stand volume (m3 ha-1): - Tree density (ha-1): - Tree age (years): -