Articles | Volume 18, issue 3
Biogeosciences, 18, 1203–1221, 2021
https://doi.org/10.5194/bg-18-1203-2021
Biogeosciences, 18, 1203–1221, 2021
https://doi.org/10.5194/bg-18-1203-2021

Research article 16 Feb 2021

Research article | 16 Feb 2021

The seasonal phases of an Arctic lagoon reveal the discontinuities of pH variability and CO2 flux at the air–sea interface

Cale A. Miller et al.

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Cited articles

Åberg, J., Jansson, M., and Jonsson, A.: Importance of water temperature and thermal stratification dynamics for temporal variation of surface water CO2 in a boreal lake, J. Geophys. Res.-Biogeo., 115, G02024, https://doi.org/10.1029/2009JG001085, 2010. 
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Aller, R. C.: Transport and reactions in the bioirrigated zone, in: The Benthic Boundary Layer: Transport Processes and Biogeochemistry, edited by: Boudreau, B. P. and Jorgensen, B. B., Oxford University Press, New York, 269–301, 2001. 
Beaufort Lagoon Ecosystems LTER and Kasper, J.: Circulation dynamics: currents, waves, temperature measurements from moorings in lagoon sites along the Alaska Beaufort Sea coast, 2018-ongoing ver 2, Environmental Data Initiative, https://doi.org/10.6073/pasta/3475cdbb160a9f844aa5ede627c5f6fe, 2020. 
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Short summary
We report here the first year-long high-frequency pH data set for an Arctic lagoon that captures ice-free and ice-covered seasons. pH and salinity correlation varies by year as we observed positive correlation and independence. Photosynthesis is found to drive high pH values, and small changes in underwater solar radiation can result in rapid decreases in pH. We estimate that arctic lagoons may act as sources of CO2 to the atmosphere, potentially offsetting the Arctic Ocean's CO2 sink capacity.
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