Atmospheric methane and carbon dioxide from the SWERUS-C3 Arctic Ocean expedition in 2014, leg 2
Brett Thornton, Kristian Andersson, Patrick Crill
Shipborne atmospheric measurements of methane (CH₄) and carbon dioxide (CO₂) from the Eastern Arctic Ocean in August and September 2014.
This dataset provides rare measurements of CH₄ and CO₂ in the near-sea surface atmosphere and CH₄ in the surface layer of 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 at 9, 15, 20, and 35 m heights above sea surface during leg 2 of the SWERUS-C3 expedition to the Arctic Ocean.
AtmosphereArctic carbonArctic OceanGreenhouse gasMethaneCarbon dioxideSWERUS-C3 expeditionIcebreaker OdenChukchi SeaEast Siberian Sea
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References
Berchet A, Pison I, Crill PM, Thornton B, Bousquet P, Thonat T, Hocking T, Thanwerdas J, Paris J-D, Saunois M (2020). Using ship-borne observations of methane isotopic ratio in the Arctic Ocean to understand methane sources in the Arctic. Atmos. Chem. Phys. https://doi.org/10.5194/acp-2019-595
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
Thornton B, Geibel M, Crill P, Humborg C (2016). Atmospheric methane and carbon dioxide and surface water methane from the SWERUS-C3 Arctic Ocean expedition in 2014, leg 1. Dataset version 1.0. Bolin Centre Database. https://doi.org/10.17043/thornton-2016
Thornton B, Andersson K, Crill P (2020). Carbon isotope ratio (δ¹³C) in atmospheric methane from the SWERUS-C3 Arctic Ocean expedition in 2014. Dataset version 1.0. Bolin Centre Database. https://doi.org/10.17043/swerus-2014-d13c
Data description
The data are provided in one comma-separated values (csv) file with seven columns:
- Date and time (SQL style)
- Valve position (inlet height, see below)
- GPS latitude
- GPS longitude
- GPS day-of-year (UTC time)
- Calibrated CO₂ (ppm)
- 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.
Comments
Related datasets also available:
- Atmospheric methane and carbon dioxide and surface water methane from the SWERUS-C3 Arctic Ocean expedition in 2014, leg 1 (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 (Thornton et al. 2020).
Alternative contact person for this dataset: Patrick Crill, Department of Geological Sciences, Stockholm University.
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. This work has been supported by the Franco-Swedish IZOMET-FS project Distinguishing Arctic CH₄ sources to the atmosphere using inverse analysis of high-frequency CH₄, δ¹³C-CH₄ and CH₃D measurements.
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
2014-08-17
End date
2014-09-26