Atmospheric methane and carbon dioxide and surface water methane from the SWERUS-C3 Arctic Ocean expedition in 2014, leg 1
Brett Thornton, Marc Geibel, Patrick Crill, Christoph Humborg
Atmospheric observations of CH₄ and CO₂ above the Eastern Arctic Ocean, and dissolved CH₄ in surface waters of the Eastern Arctic Ocean in July and August 2014.
This dataset provides rare measurements of CH₄ and CO₂ in the near-sea surface atmosphere above the Eastern Arctic Ocean and its marginal seas. These measurements are needed for Arctic carbon cycle studies and understanding emissions of CH₄ from marine sources in the Arctic.
Measurements were made onboard the Swedish icebreaker Oden during leg 1 of the SWERUS-C3 expedition to the Arctic Ocean.
AtmosphereArctic carbonArctic OceanGreenhouse gasSurface waterMethaneCarbon dioxideSWERUS-C3 expeditionIcebreaker OdenLaptev SeaEast Siberian SeaChukchi Sea
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Version
Citation
References
Thornton BF, Geibel MC, Crill PM, Humborg C, Mörth C‐M (2016). Methane fluxes from the sea to the atmosphere across the Siberian shelf seas. Geophys. Res. Lett. 43, 5869 – 5877, https://doi.org/10.1002/2016GL068977
Data description
The data are included in three comma-separated values (csv) files:
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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.
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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.
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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.
Comments
Atmospheric CH₄ and CO₂ data for leg 2 of SWERUS-C3 are also available.
Project
Swedish – Russian – US Arctic Ocean Investigation of Climate-Cryosphere-Carbon Interactions (SWERUS-C3) expedition. Funding for the expedition was provided by the Knut and Alice Wallenberg Foundation, Vetenskapsrådet (Swedish Research Council), Stockholm University, Swedish Polar Research Secretariat, and Bolin Centre for Climate Research.
Publisher
Bolin Centre Database
First name
Brett
Last name or organisation
Thornton
Email address
Address
Department of Geological Sciences; Stockholm University
Postal code
SE-106 91
City
Stockholm
Country
Sweden
GCMD science keyword
Earth science > Atmosphere > Atmospheric chemistry > Carbon and hydrocarbon compounds
GCMD location
Ocean > Arctic Ocean
Dataset language
English
Begin date
2014-07-08
End date
2014-08-17