Articles | Volume 21, issue 10
Atmos. Chem. Phys., 21, 8089–8110, 2021
Atmos. Chem. Phys., 21, 8089–8110, 2021

Research article 26 May 2021

Research article | 26 May 2021

Uncertainties in eddy covariance air–sea CO2 flux measurements and implications for gas transfer velocity parameterisations

Yuanxu Dong et al.


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Referee Comment on acp-2021-120', Byron Blomquist, 18 Mar 2021
    • AC1: 'Reply on RC1', Yuanxu Dong, 14 Apr 2021
  • RC2: 'Comment on acp-2021-120', Anonymous Referee #2, 29 Mar 2021
    • AC2: 'Reply on RC2', Yuanxu Dong, 14 Apr 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Yuanxu Dong on behalf of the Authors (18 Apr 2021)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (21 Apr 2021) by Leiming Zhang
Short summary
Eddy covariance (EC) is the most direct method for measuring air–sea CO2 flux from ships. However, uncertainty in EC air–sea CO2 fluxes has not been well quantified. Here we show that with the state-of-the-art gas analysers, instrumental noise no longer contributes significantly to the CO2 flux uncertainty. Applying an appropriate averaging timescale (1–3 h) and suitable air–sea CO2 fugacity threshold (at least 20 µatm) to EC flux data enables an optimal analysis of the gas transfer velocity.
Final-revised paper