Articles | Volume 15, issue 12
Biogeosciences, 15, 3743–3760, 2018
https://doi.org/10.5194/bg-15-3743-2018
Biogeosciences, 15, 3743–3760, 2018
https://doi.org/10.5194/bg-15-3743-2018

Research article 20 Jun 2018

Research article | 20 Jun 2018

The sensitivity of estuarine aragonite saturation state and pH to the carbonate chemistry of a freshet-dominated river

Benjamin L. Moore-Maley et al.

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Cited articles

Allen, S. E. and Wolfe, M. A.: Hindcast of the timing of the spring phytoplankton bloom in the Strait of Georgia, 1968–2010, Prog. Oceanogr., 115, 6–13, https://doi.org/10.1016/j.pocean.2013.05.026, 2013.
Allen, S. E., Latornell, D., Olson, E., and Pawlowicz, R.: Timing of the spring phytoplankton bloom in the Strait of Georgia, 2015 and 2016, in: State of the physical, biological and selected fishery resources of Pacific Canadian marine ecosystems in 2015, edited by: Chandler, P., King, S., and Perry, I., Can. Tech. Rep. Fish. Aquat. Sci., Canada, 3179, 147–152, 2016.
Amiotte Suchet, P., Probst, J., and Ludwig, W.: Worldwide distribution of continental rock lithology: Implications for the atmospheric/soil CO2 uptake by continental weathering and alkalinity river transport to the oceans, Global Biogeochem. Cy., 17, 1038, https://doi.org/10.1029/2002GB001891, 2003.
Bianucci, L., Denman, K. L., and Ianson, D.: Low oxygen and high inorganic carbon on the Vancouver Island Shelf, J. Geophys. Res.-Ocean., 116, C07011, https://doi.org/10.1029/2010JC006720, 2011.
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Short summary
Estuaries are vulnerable to ocean acidification, but present-day estuarine pH and aragonite saturation state variability are larger than in the open ocean. Using a numerical model of a large estuary and data from its primary river, we find that changes in river alkalinity relative to river carbon may determine a small but significant portion of this variability, while the majority is controlled by photosynthesis/respiration. Future watershed changes may shift the river alkalinity–carbon balance.
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