http://bolin.su.se/data/stordalen-lakes-ch4-ebul-3 Joachim Jansen, Martin Wik, Patrick Crill Bolin Centre Database 2020 Datafile Lacustrine Arctic carbon Lake Methane Ebullution Methane isotopes Subarctic Earth science > Atmosphere > Atmospheric chemistry > Carbon and hydrocarbon compounds > Methane Patrick Crill 2020-09-09T13:32:16+00:00 English 3 This dataset consists of one .csv file (data), two .png files (map of the sampling locations and photos of the bubble trap) and one .pdf file (readme). The data are derived multiyear measurements of methane (CH₄) bubble fluxes from 2009 – ⁠2017 (n = 14677) and a subset of those gas collections taken between 2009-2011 and analyzed for δ¹³C-CH₄ (n = 177) and δ²H-CH₄ (n = 251) from three small subarctic lakes in the Stordalen Mire complex. The Mire is located ca. 10 km east of Abisko, in northern Sweden (68°21′N, 19°02′E). Bubble traps were continuously deployed from June to September during the ice-free seasons across depth zones of the lakes and sampled (volume measure and gas removed from the traps) every 1-3 days of 2009 to 2017. Paired surface sediment temperatures were computed from HOBO Water Temp Pro V2 temperature loggers (Onset Computer) deployed at different depths at the deepest point in each of the lakes. The water column temperature data are available in the dataset [Temperatures in subarctic lakes on the Stordalen Mire, Abisko, Northern Sweden](https://bolin.su.se/data/stordalen-lake-temperature-3). For details about the sampling procedure and locations, please refer to the Stordalen lake flux publications by Wik et al. (2013), Jansen et al. (2020), Wik et al. (2020); see References. The csv data file (character set: UTF-8) has one header row and 15129 rows of data. There are twelve (12) data columns. NaN denotes data missing for any reason. The headers should be self-explanatory but please read the readme pdf for further information. Please, cite both the data set itself and the appropriate publications by Wik et al. (2013), Jansen et al. (2020), Wik et al. (2020) (see References) when using these data. The principal investigators (Joachim Jansen, Martin Wik, Patrick Crill) would also welcome notification when the data are used in any publication or derivative work. #### Version history ##### Version 3 Added isotope data to the dataset csv file. Fixed errors in the sampling time stamps for DOY. Included an additional image file (photos of bubble trap). ##### Version 2 Initial release. ##### Version 1 Not published. Used in the Wik et al. (2013) paper and has fewer years (2010⁠ – ⁠2014).