Controls on buffering and coastal acidification in a temperate estuary
Abstract Estuaries may be uniquely susceptible to the combined acidification pressures of atmospherically driven ocean acidification (OA), biologically driven CO 2 inputs from the estuary itself, and terrestrially derived freshwater inputs. This study utilized continuous measurements of total alkali...
Published in: | Limnology and Oceanography |
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crwiley:10.1002/lno.12085 2024-06-09T07:48:48+00:00 Controls on buffering and coastal acidification in a temperate estuary Hunt, Christopher W. Salisbury, Joseph E. Vandemark, Douglas National Oceanic and Atmospheric Administration National Science Foundation of Sri Lanka 2022 http://dx.doi.org/10.1002/lno.12085 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12085 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.12085 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12085 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ http://creativecommons.org/licenses/by-nc-nd/4.0/ Limnology and Oceanography volume 67, issue 6, page 1328-1342 ISSN 0024-3590 1939-5590 journal-article 2022 crwiley https://doi.org/10.1002/lno.12085 2024-05-16T14:28:26Z Abstract Estuaries may be uniquely susceptible to the combined acidification pressures of atmospherically driven ocean acidification (OA), biologically driven CO 2 inputs from the estuary itself, and terrestrially derived freshwater inputs. This study utilized continuous measurements of total alkalinity (TA) and the partial pressure of carbon dioxide (pCO 2 ) from the mouth of Great Bay, a temperate northeastern U.S. estuary, to examine the potential influences of endmember mixing and biogeochemical transformation upon estuary buffering capacity ( β – H ). Observations were collected hourly over 28 months representing all seasons between May 2016 and December 2019. Results indicated that endmember mixing explained most of the observed variability in TA and dissolved inorganic carbon (DIC), concentrations of which varied strongly with season. For much of the year, mixing dictated the relative proportions of salinity‐normalized TA and DIC as well, but a fall season shift in these proportions indicated that aerobic respiration was observed, which would decrease β – H by decreasing TA and increasing DIC. However, fall was also the season of weakest statistical correspondence between salinity and both TA and DIC, as well as the overall highest salinity, TA and β – H . Potential biogeochemically driven β – H decreases were overshadowed by increased buffering capacity supplied by coastal ocean water. A simple modeling exercise showed that mixing processes controlled most monthly changes in TA and DIC, obscuring impacts from air–sea exchange or metabolic processes. Advective mixing contributions may be as important as biogeochemically driven changes to observe when evaluating local estuarine and coastal OA. Article in Journal/Newspaper Ocean acidification Wiley Online Library Limnology and Oceanography 67 6 1328 1342 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Estuaries may be uniquely susceptible to the combined acidification pressures of atmospherically driven ocean acidification (OA), biologically driven CO 2 inputs from the estuary itself, and terrestrially derived freshwater inputs. This study utilized continuous measurements of total alkalinity (TA) and the partial pressure of carbon dioxide (pCO 2 ) from the mouth of Great Bay, a temperate northeastern U.S. estuary, to examine the potential influences of endmember mixing and biogeochemical transformation upon estuary buffering capacity ( β – H ). Observations were collected hourly over 28 months representing all seasons between May 2016 and December 2019. Results indicated that endmember mixing explained most of the observed variability in TA and dissolved inorganic carbon (DIC), concentrations of which varied strongly with season. For much of the year, mixing dictated the relative proportions of salinity‐normalized TA and DIC as well, but a fall season shift in these proportions indicated that aerobic respiration was observed, which would decrease β – H by decreasing TA and increasing DIC. However, fall was also the season of weakest statistical correspondence between salinity and both TA and DIC, as well as the overall highest salinity, TA and β – H . Potential biogeochemically driven β – H decreases were overshadowed by increased buffering capacity supplied by coastal ocean water. A simple modeling exercise showed that mixing processes controlled most monthly changes in TA and DIC, obscuring impacts from air–sea exchange or metabolic processes. Advective mixing contributions may be as important as biogeochemically driven changes to observe when evaluating local estuarine and coastal OA. |
author2 |
National Oceanic and Atmospheric Administration National Science Foundation of Sri Lanka |
format |
Article in Journal/Newspaper |
author |
Hunt, Christopher W. Salisbury, Joseph E. Vandemark, Douglas |
spellingShingle |
Hunt, Christopher W. Salisbury, Joseph E. Vandemark, Douglas Controls on buffering and coastal acidification in a temperate estuary |
author_facet |
Hunt, Christopher W. Salisbury, Joseph E. Vandemark, Douglas |
author_sort |
Hunt, Christopher W. |
title |
Controls on buffering and coastal acidification in a temperate estuary |
title_short |
Controls on buffering and coastal acidification in a temperate estuary |
title_full |
Controls on buffering and coastal acidification in a temperate estuary |
title_fullStr |
Controls on buffering and coastal acidification in a temperate estuary |
title_full_unstemmed |
Controls on buffering and coastal acidification in a temperate estuary |
title_sort |
controls on buffering and coastal acidification in a temperate estuary |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/lno.12085 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12085 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.12085 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12085 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Limnology and Oceanography volume 67, issue 6, page 1328-1342 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1002/lno.12085 |
container_title |
Limnology and Oceanography |
container_volume |
67 |
container_issue |
6 |
container_start_page |
1328 |
op_container_end_page |
1342 |
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1801380699725365248 |