[{"title":"Methane bubble fluxes from subarctic lakes on the Stordalen Mire, Abisko, Northern Sweden","summary":"This dataset provides measurements of the bubble flux of methane (CH\u2084), a strong greenhouse gas, to the atmosphere from three subarctic lakes located on the Stordalen Mire in northern Sweden.\r\n\r\nWe measured ebullition (bubbling) of CH\u2084 gas with bubble traps during the ice-free seasons of 2009 to 2017. 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). Up to 40 bubble traps were continuously deployed across depth zones and sampled (emptied of gas) every 10\u2060\u200a\u2013\u200a\u20603 days to capture the erratic nature of bubble gas release. CH\u2084 concentrations were measured on a gas chromatograph. A flux was computed from the gas volume flux and CH\u2084 concentration. Paired measurements of the surface sediment temperature 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":"Wik M, Crill PM, Varner RK, Bastviken D. (2013). Multiyear measurements of ebullitive methane flux from three subarctic lakes, Journal of Geophysical Research: Biogeosciences, 118, 1307\u2060\u200a\u2013\u200a\u20601321. doi:10.1002\/jgrg.20103\r\n\r\nJansen J, Thornton BF, Wik M, MacIntyre S, Crill PM. (2020). Temperature proxies as a solution to biased sampling of lake methane emissions. Geophysical Research Letters, 47. doi:10.1029\/2020GL088647\r\n","comments":"Please, cite both the dataset itself and the publications by Wik et al. (2013) and Jansen et al. (2020) when using this dataset. The principal investigators (Joachim Jansen and [Patrick Crill](mailto:patrick.crill@geo.su.se)) would also welcome to receive a notification when the data are used in any publication or derivative work.\r\n\r\n#### Version history\r\n\r\n##### Version 2.0\r\nInitial release.\r\n\r\n##### Version 1.0\r\nNot published. Used in the Wik et al. (2013) paper and has fewer years (2010\u2060\u200a\u2013\u200a\u20602014).","category":"Lacustrine","subcategory":"Arctic carbon","keywords":"Lake; Methane; Ebullution; Subarctic","scientist":"Joachim Jansen, Martin Wik, 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":"2.0","constrains":"","access":"Free"}]