http://bolin.su.se/data/oden-swerus-2014-leg-1-ghg-1 Brett Thornton, Marc Geibel, Patrick Crill, Christoph Humborg Bolin Centre Database 2016 Datafile Atmosphere Arctic carbon Arctic Ocean Greenhouse gas Surface water Methane Carbon dioxide SWERUS-C3 expedition Icebreaker Oden Laptev Sea East Siberian Sea Chukchi Sea Earth science > Atmosphere > Atmospheric chemistry > Carbon and hydrocarbon compounds Brett Thornton 2016-06-13T12:23:57+00:00 English 1 None, but please cite Thornton et al. (2016) The data are included in three comma-separated values (csv) files: 1. SWERUS_leg1_air_GHG_temporal.csv - Calibrated CH₄, CO₂ in ppm, measured in the air at 4, 9, 15, 20, and 35 m heights above sea surface. - Standard deviation of CH₄ and CO₂, in ppm. - GPS (day of year, latitude, longitude). - valve position (inlet height, see below). Data are provided for day of year 192⁠ – 229. The atmospheric data have been filtered for windspeed, wind direction, and CO₂ > 450 ppm (filters are designed to remove possible ship influence from data). Valve position corresponds to measurement height above sea level: 1 = 4 m (rarely used), 2 = 9 m, 3 = 20 m, 4 = 15 m, 5 = 35 m. 2. SWERUS_leg1_water_GHG_temporal.csv - Calibrated dissolved CH₄ in ppm, data measured from an intake in the hull of Oden at ca. 8 m depth. - GPS (latitude, longitude, day of year). - seawater salinity. - seawater temperature. - seawater pH. - 10 m windspeed (corrected from measurement height). Data are provided for day of year 189⁠ – 222. 3. SWERUS_leg1_air_water_GHG_spatial.csv - Includes coincident air and water measurements from days 192⁠ – 222. Same measurements as above, but all measurements have been gridded and averaged to 0.001 degree resolution (a spatial normalization process which accounts for varying ship speed during the cruise). Some further details are provided in a readme pdf file. [Atmospheric CH₄ and CO₂ data for leg 2 of SWERUS-C3](https://bolin.su.se/data/swerus-2014-ghg) are also available.