Assessing drivers of estuarine pH: A comparative analysis of the continental U.S.A.'s two largest estuaries ...
Abstract In estuaries, local processes such as changing material loads from the watershed and complex circulation create dynamic environments with respect to ecosystem metabolism and carbonate chemistry that can strongly modulate impacts of global atmospheric CO 2 increases on estuarine pH. Long-ter...
| Main Authors: | , , , |
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| Format: | Text |
| Language: | unknown |
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Wiley
2023
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.17615/4nb3-r749 https://cdr.lib.unc.edu/concern/articles/6w924p949 |
| Summary: | Abstract In estuaries, local processes such as changing material loads from the watershed and complex circulation create dynamic environments with respect to ecosystem metabolism and carbonate chemistry that can strongly modulate impacts of global atmospheric CO 2 increases on estuarine pH. Long-term (> 20 yr) surface water pH records from the USA's two largest estuaries, Chesapeake Bay (CB) and Neuse River Estuary-Pamlico Sound (NRE-PS) were examined to understand the relative importance of atmospheric forcing vs. local processes in controlling pH. At the estuaries' heads, pH increases in CB and decreases in NRE-PS were driven primarily by changing ratios of river alkalinity to dissolved inorganic carbon concentrations. In upper reaches of CB and middle reaches of the NRE-PS, pH increases were associated with increases in phytoplankton biomass. There was no significant pH change in the lower NRE-PS and only the polyhaline CB showed a pH decline consistent with ocean acidification. In both estuaries, ... |
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