Using ship-borne observations of methane isotopic ratio in the Arctic Ocean to understand methane sources in the Arctic

Berchet, Antoine; Pison, Isabelle; Crill, Patrick M.; Thornton, Brett; Bousquet, Philippe; Thonat, Thibaud; Hocking, Thomas; Thanwerdas, Joël; Paris, Jean-Daniel; Saunois, Marielle

doi:https://doi.org/10.5194/acp-20-3987-2020

Articles | Volume 20, issue 6

https://doi.org/10.5194/acp-20-3987-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-20-3987-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 6

Research article

|

02 Apr 2020

Research article |

| 02 Apr 2020

Using ship-borne observations of methane isotopic ratio in the Arctic Ocean to understand methane sources in the Arctic

Antoine Berchet, Isabelle Pison, Patrick M. Crill, Brett Thornton, Philippe Bousquet, Thibaud Thonat, Thomas Hocking, Joël Thanwerdas, Jean-Daniel Paris, and Marielle Saunois

Supplement

https://doi.org/10.5194/acp-20-3987-2020-supplement

Data sets

Atmospheric methane and carbon dioxide and surface water methane from the SWERUS-C3 Arctic Ocean expedition in 2014, leg 1 B. Thornton, M. Geibel, P. Crill, and C. Humborg https://bolin.su.se/data/thornton-2016

Atmospheric methane and carbon dioxide from the SWERUS-C3 Arctic Ocean expedition in 2014, leg 2 B. Thornton, M. Geibel, P. Crill, and C. Humborg https://bolin.su.se/data/swerus-2014-ghg

Carbon isotope ratio (δ¹³C) in atmospheric methane from the SWERUS-C3 Arctic Ocean expedition in 2014 B. Thornton, M. Geibel, P. Crill, and C. Humborg https://bolin.su.se/data/swerus-2014-d13c

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Short summary

Methane isotopes in the atmosphere can help us differentiate between emission processes. A large variety of natural and anthropogenic emission types are active in the Arctic and are unsatisfactorily understood and documented up to now. A ship-based campaign was carried out in summer 2014, providing a unique dataset of isotopic measurements in the Arctic Ocean. Using a chemistry-transport model, we link these measurements to circumpolar emissions and retrieve information about their signature.