Articles | Volume 17, issue 6
Research article
18 Nov 2021
Research article |  | 18 Nov 2021

The diurnal cycle of pCO2 in the coastal region of the Baltic Sea

Martti Honkanen, Jens Daniel Müller, Jukka Seppälä, Gregor Rehder, Sami Kielosto, Pasi Ylöstalo, Timo Mäkelä, Juha Hatakka, and Lauri Laakso


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Martti Honkanen on behalf of the Authors (17 Jun 2021)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (02 Jul 2021) by Ingrid Puillat
RR by Anonymous Referee #1 (23 Jul 2021)
ED: Publish subject to technical corrections (11 Oct 2021) by Ingrid Puillat
AR by Martti Honkanen on behalf of the Authors (18 Oct 2021)  Author's response    Manuscript
Short summary
The exchange of carbon dioxide (CO2) between the sea and the atmosphere is regulated by the gradient of CO2 partial pressure (pCO2) between the sea and the air. The daily variation of the seawater pCO2 recorded at the fixed station Utö in the Baltic Sea was found to be mainly biologically driven. Calculation of the annual net exchange of CO2 between the sea and atmosphere based on daily measurements of pCO2 carried out using the same sampling time every day could introduce a bias of up to 12 %.