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.
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Citation
Brett Thornton, Kristian Andersson, Patrick Crill (2020). Atmospheric methane and carbon dioxide from the SWERUS-C3 Arctic Ocean expedition in 2014, leg 2. Dataset version 1.0. Bolin Centre Database. https://doi.org/10.17043/swerus-2014-ghg
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. 20, 3987 – 3998 https://doi.org/10.5194/acp-20-3987-2020
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
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Alternative contact person for this dataset: [javascript protected email address], Department of Geological Sciences, Stockholm University.