Latnjajaure Field Station - ITEX CH4 data and environmental parameters year 2017-2018 Latnjajaure fältstation - ITEX CH4 data och miljödata för åren 2017-2018 2024-512-1 https://doi.org/10.5878/y091-aq58 Swedish National Data Service Svensk nationell datatjänst Landing page Latnjajaure Field Station - ITEX CH4 data and environmental parameters year 2017-2018 Latnjajaure fältstation - ITEX CH4 data och miljödata för åren 2017-2018 2024-512-1 https://doi.org/10.5878/y091-aq58 Björkman, Mats Björkman, Mats Rudner, Mario Rudner, Mario Pesqueda, Argus Pesqueda, Argus Gray, Mabel Gray, Mabel 2016-01187_Formas 2016-01187_Formas 2021-04011_VR 2021-04011_VR 2022-00786_Formas 2022-00786_Formas 657627 657627 Swedish National Data Service Svensk nationell datatjänst Landing page methane flux Bio-geographical regions Biogeografiska regioner Environmental monitoring facilities Anläggningar för miljöövervakning Land cover Landtäcke alpine vegetation Environment Miljö This dataset holds bi-weekly measurements of of methane fluxes from long-term experimental warming treatments, using open top chambers, at Latnjajaure Field station, outside Abisko. The experiment is set up in five plant communities: Dry Heath (HD), Dry Meadow (MD), Mesic Meadow (MM), Wet Meadow (MW) and Tussock Tundra (TT), and has been running since 1993/1994 with the measurements of methane fluxes conducted in 2017 and 2018. Additional data from bi-weekly measurements on Soil Water Content (SWC) and soil temperature (Tsoil) is also added. Single time measurements of as well as Soil Organic Matter (SOM) content, pH, vegetation height and biomass is also included in the dataset. Denna datauppsättning innehåller mätningar (varannan vecka) av metanflöden från långsiktiga experimentella uppvärmningsbehandlingar, vid Latnjajaure fältstation utanför Abisko. Experimentet är uppställt i fem växtsamhällen: torr hed (HD), torräng (MD), mesisk äng (MM), våtäng (MW) och tuvullstundra (TT). Experimentet har pågått sedan 1993/1994 med mätningar av metanflöden utförda under 2017 och 2018. Ytterligare data från mätningar av markfuktighet (SWC) och marktemperatur (Tsoil) är också includerade. Engångsmätningar av såväl markens organiska material (SOM), pH, vegetationshöjd och biomassa ingår också i datauppsättningen. 2017-06-01 2020-09-01 Arctic Arktis Numeric Fluxes of methane were measured on a bi-weekly basis during the growing season of 2017 and 2018 (June – August). A transparent chamber (Ø = 20 cm, h = 20 cm) equipped with a pressure vent was fitted to pre-installed soil collars (inserted 5-10 cm into the soil) and an airtight seal was obtained by folding down a rubber tape from the chamber over the collar. The corresponding change in methane concentration in the chamber was measured using an Ultraportable Greenhouse Gas Analyzer (operating at 1 Hz, UGGA, Los Gatos Research, San Jose, U.S.). In connection to all flux measurements, soil temperatures at - 5 cm (Tsoil) and soil water content at 0 – 6 cm (SWC) were recorded at four locations around the chamber (using a hand-held thermometer and an ML3 ThetaProbe, Delta-T Devices, Cambridge, U.K., respectively), Additional soil data were also collected, including pH and soil organic matter (SOM), from 5 cm deep soil cores (Ø = 2.5 cm) collected in July 2019. General canopy heights were investigated in 2020 by laying out two lines, from corner to corner in plots, forming a cross with nine marked investigation points where height from ground to the top of the canopy was recorded.Fluxes of methane were measured on a bi-weekly basis during the growing season of 2017 and 2018 (June – August). A transparent chamber (Ø = 20 cm, h = 20 cm) equipped with a pressure vent was fitted to pre-installed soil collars (inserted 5-10 cm into the soil) and an airtight seal was obtained by folding down a rubber tape from the chamber over the collar. The corresponding change in methane concentration in the chamber was measured using an Ultraportable Greenhouse Gas Analyzer (operating at 1 Hz, UGGA, Los Gatos Research, San Jose, U.S.). In connection to all flux measurements, soil temperatures at - 5 cm (Tsoil) and soil water content at 0 – 6 cm (SWC) were recorded at four locations around the chamber (using a hand-held thermometer and an ML3 ThetaProbe, Delta-T Devices, Cambridge, U.K., respectively), Additional soil data were also collected, including pH and soil organic matter (SOM), from 5 cm deep soil cores (Ø = 2.5 cm) collected in July 2019. General canopy heights were investigated in 2020 by laying out two lines, from corner to corner in plots, forming a cross with nine marked investigation points where height from ground to the top of the canopy was recorded. ObservationObservation ObservationObservation Access to data through SND. Data are freely accessible. Åtkomst till data via SND. Data är fritt tillgängliga. openAccess