http://bolin.su.se/data/oden-swerus-2014-leg-2-ghg-1 Brett Thornton, Kristian Andersson, Patrick Crill Bolin Centre Database 2020 Datafile Atmosphere Arctic carbon Arctic Ocean Greenhouse gas Methane Carbon dioxide SWERUS-C3 expedition Icebreaker Oden Chukchi Sea East Siberian Sea Earth science > Atmosphere > Atmospheric chemistry > Carbon and hydrocarbon compounds Brett Thornton 2020-03-30T10:41:42+00:00 English 1 None, but please cite Berchet et al. (2020) and Thornton et al. (2016) The data are provided in one comma-separated values (csv) file with seven columns: 1. Date and time (SQL style) 2. Valve position (inlet height, see below) 3. GPS latitude 4. GPS longitude 5. GPS day-of-year (UTC time) 6. Calibrated CO₂ (ppm) 7. Calibrated CH₄ (ppm) Calibrated CH₄ and CO₂ are measured in the air at 9, 15, 20, and 35 m heights above sea surface. Valve position corresponds to measurement height above sea level: 1 = 4 m (not used in this dataset), 2 = 9 m, 3 = 20 m, 4 = 15 m, 5 = 35 m. The atmospheric data have been filtered for windspeed, wind direction, and CO₂ > 450 ppm (filters are designed to remove possible ship influence from data). Measurements are from a Los Gatos Research FGGA-24EP spectrometer. Data period is day-of-year 229⁠ – ⁠269 of 2014. Some further details are provided in a readme file. Related datasets also available: - [Atmospheric methane and carbon dioxide and surface water methane from the SWERUS-C3 Arctic Ocean expedition in 2014, leg 1](https://bolin.su.se/data/thornton-2016) (day-of-year 192⁠ – ⁠229) (Thornton et al. 2016) - [Carbon isotope ratio (δ¹³C) in atmospheric methane from the SWERUS-C3 Arctic Ocean expedition in 2014](https://bolin.su.se/data/swerus-2014-d13c) (Thornton et al. 2020). Alternative contact person for this dataset: [Patrick Crill](mailto:patrick.crill@geo.su.se), Department of Geological Sciences, Stockholm University.