Articles | Volume 15, issue 12
https://doi.org/10.5194/bg-15-3743-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-15-3743-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
20 Jun 2018
Research article |
| 20 Jun 2018
| 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
CORRESPONDING AUTHOR
Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, Canada
Debby Ianson
Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, Canada
Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, British Columbia, Canada
Susan E. Allen
Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, Canada
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Cited
22 citations as recorded by crossref.
- Carbon dioxide sources and sinks in the delta of the Paraíba do Sul River (Southeastern Brazil) modulated by carbonate thermodynamics, gas exchange and ecosystem metabolism during estuarine mixing L. Cotovicz et al. https://doi.org/10.1016/j.marchem.2020.103869
- Estimation of surface seawater pH in Hangzhou Bay based on machine learning Q. Chen et al. https://doi.org/10.1007/s13131-025-2622-x
- Anthropogenic Carbon Increase has Caused Critical Shifts in Aragonite Saturation Across a Sensitive Coastal System T. Jarníková et al. https://doi.org/10.1029/2021GB007024
- Ontogenetic and sex-related variations in otolith morphology and structure of thinlip gray mullet from a transitional environment in northern Italy F. De Witt et al. https://doi.org/10.3389/fmars.2026.1797222
- Media Representations and Farmer Perceptions: A Case Study of Reporting on Ocean Acidification and the Shellfish Farming Sector in British Columbia, Canada N. Drope et al. https://doi.org/10.1080/17524032.2023.2280873
- Ocean acidification in Canada: the current state of knowledge and pathways for action K. Barclay et al. https://doi.org/10.3389/fmars.2026.1761703
- Variability and drivers of carbonate chemistry at shellfish aquaculture sites in the Salish Sea, British Columbia E. Simpson et al. https://doi.org/10.5194/bg-21-1323-2024
- Using Global-Scale Earth System Models for Regional Fisheries Applications K. Kearney et al. https://doi.org/10.3389/fmars.2021.622206
- Seasonal and Spatial Controls on the Eutrophication‐Induced Acidification in the Pearl River Estuary B. Liang et al. https://doi.org/10.1029/2020JC017107
- A Multi-decadal Comparative Analysis of a Set of Physicochemical and Nutrient Parameters in the Tropical Tidal Creeks of Indian Sundarban Mangrove Biosphere Reserve S. Basu et al. https://doi.org/10.1007/s41208-020-00273-1
- Seasonal carbonate chemistry variability in marine surface waters of the US Pacific Northwest A. Fassbender et al. https://doi.org/10.5194/essd-10-1367-2018
- Combining summertime freshwater inputs and oxygen consumption impacts on coastal low aragonite saturation state: Case of the Pearl River Estuary, South China W. Shi & W. Zhai https://doi.org/10.1016/j.marpolbul.2025.118293
- Advancing an integrated understanding of land–ocean connections in shaping the marine ecosystems of coastal temperate rainforest ecoregions B. Hunt et al. https://doi.org/10.1002/lno.12724
- Carbonate Chemistry in Groundwater and Rivers Draining to the Baltic Sea: Implications for Coastal Ocean Acidification S. Börjesson et al. https://doi.org/10.1007/s12237-026-01761-y
- Physical and Biogeochemical Controls on pH Dynamics in the Northern Gulf of Mexico During Summer Hypoxia Z. Jiang et al. https://doi.org/10.1029/2019JC015140
- RC4USCoast: a river chemistry dataset for regional ocean model applications in the US East Coast, Gulf of Mexico, and US West Coast F. Gomez et al. https://doi.org/10.5194/essd-15-2223-2023
- A decade-long cruise time series (2008–2018) of physical and biogeochemical conditions in the southern Salish Sea, North America S. Alin et al. https://doi.org/10.5194/essd-16-837-2024
- Drivers of CO2-carbonate system variability in the coastal ocean south of Honolulu, Hawai’i L. Knor et al. https://doi.org/10.3389/fmars.2024.1335438
- Understanding the Implications of Hydrographic Processes on the Dynamics of the Carbonate System in a Sub-Antarctic Marine-Terminating Glacier-Fjord (53°S) J. Vellojin et al. https://doi.org/10.3389/fmars.2022.643811
- Using End‐Member Models to Estimate Seasonal Carbonate Chemistry and Acidification Sensitivity in Temperate Estuaries E. Simpson et al. https://doi.org/10.1029/2021GL095579
- Aragonite saturation states in estuaries along a climate gradient in the northwestern Gulf of Mexico X. Hu et al. https://doi.org/10.3389/fenvs.2022.951256
- Effects of Wind-Driven Lateral Upwelling on Estuarine Carbonate Chemistry M. Li et al. https://doi.org/10.3389/fmars.2020.588465
22 citations as recorded by crossref.
- Carbon dioxide sources and sinks in the delta of the Paraíba do Sul River (Southeastern Brazil) modulated by carbonate thermodynamics, gas exchange and ecosystem metabolism during estuarine mixing L. Cotovicz et al. https://doi.org/10.1016/j.marchem.2020.103869
- Estimation of surface seawater pH in Hangzhou Bay based on machine learning Q. Chen et al. https://doi.org/10.1007/s13131-025-2622-x
- Anthropogenic Carbon Increase has Caused Critical Shifts in Aragonite Saturation Across a Sensitive Coastal System T. Jarníková et al. https://doi.org/10.1029/2021GB007024
- Ontogenetic and sex-related variations in otolith morphology and structure of thinlip gray mullet from a transitional environment in northern Italy F. De Witt et al. https://doi.org/10.3389/fmars.2026.1797222
- Media Representations and Farmer Perceptions: A Case Study of Reporting on Ocean Acidification and the Shellfish Farming Sector in British Columbia, Canada N. Drope et al. https://doi.org/10.1080/17524032.2023.2280873
- Ocean acidification in Canada: the current state of knowledge and pathways for action K. Barclay et al. https://doi.org/10.3389/fmars.2026.1761703
- Variability and drivers of carbonate chemistry at shellfish aquaculture sites in the Salish Sea, British Columbia E. Simpson et al. https://doi.org/10.5194/bg-21-1323-2024
- Using Global-Scale Earth System Models for Regional Fisheries Applications K. Kearney et al. https://doi.org/10.3389/fmars.2021.622206
- Seasonal and Spatial Controls on the Eutrophication‐Induced Acidification in the Pearl River Estuary B. Liang et al. https://doi.org/10.1029/2020JC017107
- A Multi-decadal Comparative Analysis of a Set of Physicochemical and Nutrient Parameters in the Tropical Tidal Creeks of Indian Sundarban Mangrove Biosphere Reserve S. Basu et al. https://doi.org/10.1007/s41208-020-00273-1
- Seasonal carbonate chemistry variability in marine surface waters of the US Pacific Northwest A. Fassbender et al. https://doi.org/10.5194/essd-10-1367-2018
- Combining summertime freshwater inputs and oxygen consumption impacts on coastal low aragonite saturation state: Case of the Pearl River Estuary, South China W. Shi & W. Zhai https://doi.org/10.1016/j.marpolbul.2025.118293
- Advancing an integrated understanding of land–ocean connections in shaping the marine ecosystems of coastal temperate rainforest ecoregions B. Hunt et al. https://doi.org/10.1002/lno.12724
- Carbonate Chemistry in Groundwater and Rivers Draining to the Baltic Sea: Implications for Coastal Ocean Acidification S. Börjesson et al. https://doi.org/10.1007/s12237-026-01761-y
- Physical and Biogeochemical Controls on pH Dynamics in the Northern Gulf of Mexico During Summer Hypoxia Z. Jiang et al. https://doi.org/10.1029/2019JC015140
- RC4USCoast: a river chemistry dataset for regional ocean model applications in the US East Coast, Gulf of Mexico, and US West Coast F. Gomez et al. https://doi.org/10.5194/essd-15-2223-2023
- A decade-long cruise time series (2008–2018) of physical and biogeochemical conditions in the southern Salish Sea, North America S. Alin et al. https://doi.org/10.5194/essd-16-837-2024
- Drivers of CO2-carbonate system variability in the coastal ocean south of Honolulu, Hawai’i L. Knor et al. https://doi.org/10.3389/fmars.2024.1335438
- Understanding the Implications of Hydrographic Processes on the Dynamics of the Carbonate System in a Sub-Antarctic Marine-Terminating Glacier-Fjord (53°S) J. Vellojin et al. https://doi.org/10.3389/fmars.2022.643811
- Using End‐Member Models to Estimate Seasonal Carbonate Chemistry and Acidification Sensitivity in Temperate Estuaries E. Simpson et al. https://doi.org/10.1029/2021GL095579
- Aragonite saturation states in estuaries along a climate gradient in the northwestern Gulf of Mexico X. Hu et al. https://doi.org/10.3389/fenvs.2022.951256
- Effects of Wind-Driven Lateral Upwelling on Estuarine Carbonate Chemistry M. Li et al. https://doi.org/10.3389/fmars.2020.588465
Saved (final revised paper)
Latest update: 24 Aug 2026
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.
Estuaries are vulnerable to ocean acidification, but present-day estuarine pH and aragonite...
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