Articles | Volume 21, issue 20
https://doi.org/10.5194/bg-21-4495-2024
https://doi.org/10.5194/bg-21-4495-2024
Research article
 | 
15 Oct 2024
Research article |  | 15 Oct 2024

Seasonal dynamics and regional distribution patterns of CO2 and CH4 in the north-eastern Baltic Sea

Silvie Lainela, Erik Jacobs, Stella-Theresa Luik, Gregor Rehder, and Urmas Lips

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Cited articles

Alenius, P., Myrberg, K., and Nekrasov, A.: The physical oceanography of the Gulf of Finland: a review, Boreal Environ. Res., 3, 97–125, 1998. 
Alenius, P., Nekrasov, A., and Myrberg, K.: Variability of the baroclinic Rossby radius in the Gulf of Finland, Cont. Shelf Res., 23, 563–573, https://doi.org/10.1016/S0278-4343(03)00004-9, 2003. 
Andrejev, O., Myrberg, K., Alenius, P., and Lundberg, P.A.: Mean circulation and water exchange in the Gulf of Finland e a study based on three-dimensional modelling, Boreal. Environ. Res., 9, 1–16, 2004. 
Astok, V., Otsmann, M., and Suursaar, Ü.: Water exchange as the main physical process in semi-enclosed marine systems: the Gulf of Riga case, Hydrobiologia, 393, 11–18, https://doi.org/10.1023/A:1003517110726, 1999. 
Bange, H. W., Bartell, U. H., Rapsomanikis, S., and Andreae, M. O.: Methane in the Baltic and North Seas and a reassessment of the marine emissions of methane, Global Biogeochem. Cy., 8, 465–480, https://doi.org/10.1029/94GB02181, 1994. 
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We evaluate the variability of carbon dioxide and methane in the surface layer of the north-eastern basins of the Baltic Sea in 2018. We show that the shallower coastal areas have considerably higher spatial variability and seasonal amplitude of surface layer pCO2 and cCH4 than measured in the offshore areas of the Baltic Sea. Despite this high variability, caused mostly by coastal physical processes, the average annual air–sea CO2 fluxes differed only marginally between the sub-basins.
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