[{"name":"stordalen-lakes-ch4-diff-1","title":"Methane diffusive fluxes from subarctic lakes on the Stordalen Mire, Abisko, Northern Sweden","summary":"This dataset provides measurements of the diffusive flux of methane (CH\u2084), a strong climate forcing trace gas, to the atmosphere from three subarctic lakes located on the Stordalen Mire in northern Sweden.\r\n\r\nWe measured turbulence-driven diffusive fluxes of CH\u2084 with floating chambers during the ice-free seasons of 2010 to 2017, approximately every 1\u2060\u200a\u2013\u200a\u20602 weeks, from different locations in the lakes. The lakes are small (surface area 0.010\u2060\u200a\u2013\u200a\u20600.17 km\u00b2) and shallow (max. depth 1.3\u2060\u200a\u2013\u200a\u20606.7 m), and are structural features of the landscape (i.e. non-thermokarst). The chambers were deployed for 24 hours to integrate diel changes in the surface concentration and gas transfer velocity, during which the chamber headspace was sampled 2\u2060\u200a\u2013\u200a\u20604 times. Gas concentrations were measured on a gas chromatograph. A flux was computed from the rate increase of CH\u2084 in the chamber headspace. Paired measurements of key environmental variables (temperature and wind speed) are also provided. This is a unique dataset in both its spatiotemporal resolution and length.\r\n\r\nThe measurements have been used to assess the environmental drivers of CH\u2084 emissions from lakes to the atmosphere, and how emissions might change under continued Arctic warming.","citations":"Jansen J, Thornton BF, Cort\u00e9s A, Sn\u00f6\u00e4lv J, Wik M, MacIntyre S, Crill PM. (2020). Drivers of diffusive CH\u2084 emissions from shallow subarctic lakes on daily to multi-year timescales. Biogeosciences, 17, 1911\u2060\u200a\u2013\u200a\u20601932. doi:10.5194\/bg-17-1911-2020","comments":"Please, cite both the dataset itself and the publication by Jansen et al. (2020) when using this dataset. The principal investigators (Joachim Jansen and Patrick Crill) would also welcome to receive a notification when the data are used in any publication or derivative work.\r\n\r\nAlternative contact person: [Patrick Crill](mailto:patrick.crill@geo.su.se), Department of Geological Sciences, Stockholm University.","category":"Lacustrine","subcategory":"Arctic carbon","keywords":"Lake; Methane; Flux; Diffusion; Subarctic","scientist":"Joachim Jansen, Martin Wik, Jo Sn\u00f6\u00e4lv, Patrick Crill","firstname":"Joachim","lastname":"Jansen","address":"Department of Geological Sciences; Stockholm University","postalcode":"SE-106 91","city":"Stockholm","province":"","country":"Sweden","parameters":"Earth science > Atmosphere > Atmospheric chemistry > Carbon and hydrocarbon compounds > Methane","location":"Continent > Europe > Northern Europe > Scandinavia > Sweden","progress":"Completed","language":"English","project":"Carbon trace gas dynamics in subarctic lakes","publisher":"Bolin Centre Database","version":"1","constrains":"","access":"Free"}]