Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the US Mid-Atlantic Bight
Author Posting. © American Geophysical Union, 2021. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Biogeosciences 126(1), (2021): e2019JG005621, https://doi.org...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/26931 2023-05-15T17:50:57+02:00 Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the US Mid-Atlantic Bight Garcia-Tigreros, Fenix Leonte, Mihai Ruppel, Carolyn D. Ruiz-Angulo, Angel Joung, DongJoo Young, Benjamin Kessler, John D. 2020-12-23 https://hdl.handle.net/1912/26931 unknown American Geophysical Union https://doi.org/10.1029/2019JG005621 Garcia-Tigreros, F., Leonte, M., Ruppel, C. D., Ruiz-Angulo, A., Joung, D. J., Young, B., & Kessler, J. D. (2021). Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the US Mid-Atlantic Bight. Journal of Geophysical Research: Biogeosciences, 126(1), e2019JG005621. https://hdl.handle.net/1912/26931 doi:10.1029/2019JG005621 Garcia-Tigreros, F., Leonte, M., Ruppel, C. D., Ruiz-Angulo, A., Joung, D. J., Young, B., & Kessler, J. D. (2021). Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the US Mid-Atlantic Bight. Journal of Geophysical Research: Biogeosciences, 126(1), e2019JG005621. doi:10.1029/2019JG005621 Radiocarbon Methane DIC Ocean acidification Climate change U.S Mid-Atlantic Bight Article 2020 ftwhoas https://doi.org/10.1029/2019JG005621 2022-10-29T22:57:22Z Author Posting. © American Geophysical Union, 2021. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Biogeosciences 126(1), (2021): e2019JG005621, https://doi.org/10.1029/2019JG005621. Ongoing ocean warming can release methane (CH4) currently stored in ocean sediments as free gas and gas hydrates. Once dissolved in ocean waters, this CH4 can be oxidized to carbon dioxide (CO2). While it has been hypothesized that the CO2 produced from aerobic CH4 oxidation could enhance ocean acidification, a previous study conducted in Hudson Canyon shows that CH4 oxidation has a small short‐term influence on ocean pH and dissolved inorganic radiocarbon. Here we expand upon that investigation to assess the impact of widespread CH4 seepage on CO2 chemistry and possible accumulation of this carbon injection along 234 km of the U.S. Mid‐Atlantic Bight. Consistent with the estimates from Hudson Canyon, we demonstrate that a small fraction of ancient CH4‐derived carbon is being assimilated into the dissolved inorganic radiocarbon (mean fraction of 0.5 ± 0.4%). The areas with the highest fractions of ancient carbon coincide with elevated CH4 concentration and active gas seepage. This suggests that aerobic CH4 oxidation has a greater influence on the dissolved inorganic pool in areas where CH4 concentrations are locally elevated, instead of displaying a cumulative effect downcurrent from widespread groupings of CH4 seeps. A first‐order approximation of the input rate of ancient‐derived dissolved inorganic carbon (DIC) into the waters overlying the northern U.S. Mid‐Atlantic Bight further suggests that oxidation of ancient CH4‐derived carbon is not negligible on the global scale and could contribute to deepwater acidification over longer time scales. This study was sponsored by U.S. Department of Energy (DE‐FE0028980, awarded to J. D. K; DE‐FE0026195 interagency agreement with C. D. R.). We thank ... Article in Journal/Newspaper Ocean acidification Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Hudson Journal of Geophysical Research: Biogeosciences 126 1 |
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Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
unknown |
topic |
Radiocarbon Methane DIC Ocean acidification Climate change U.S Mid-Atlantic Bight |
spellingShingle |
Radiocarbon Methane DIC Ocean acidification Climate change U.S Mid-Atlantic Bight Garcia-Tigreros, Fenix Leonte, Mihai Ruppel, Carolyn D. Ruiz-Angulo, Angel Joung, DongJoo Young, Benjamin Kessler, John D. Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the US Mid-Atlantic Bight |
topic_facet |
Radiocarbon Methane DIC Ocean acidification Climate change U.S Mid-Atlantic Bight |
description |
Author Posting. © American Geophysical Union, 2021. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Biogeosciences 126(1), (2021): e2019JG005621, https://doi.org/10.1029/2019JG005621. Ongoing ocean warming can release methane (CH4) currently stored in ocean sediments as free gas and gas hydrates. Once dissolved in ocean waters, this CH4 can be oxidized to carbon dioxide (CO2). While it has been hypothesized that the CO2 produced from aerobic CH4 oxidation could enhance ocean acidification, a previous study conducted in Hudson Canyon shows that CH4 oxidation has a small short‐term influence on ocean pH and dissolved inorganic radiocarbon. Here we expand upon that investigation to assess the impact of widespread CH4 seepage on CO2 chemistry and possible accumulation of this carbon injection along 234 km of the U.S. Mid‐Atlantic Bight. Consistent with the estimates from Hudson Canyon, we demonstrate that a small fraction of ancient CH4‐derived carbon is being assimilated into the dissolved inorganic radiocarbon (mean fraction of 0.5 ± 0.4%). The areas with the highest fractions of ancient carbon coincide with elevated CH4 concentration and active gas seepage. This suggests that aerobic CH4 oxidation has a greater influence on the dissolved inorganic pool in areas where CH4 concentrations are locally elevated, instead of displaying a cumulative effect downcurrent from widespread groupings of CH4 seeps. A first‐order approximation of the input rate of ancient‐derived dissolved inorganic carbon (DIC) into the waters overlying the northern U.S. Mid‐Atlantic Bight further suggests that oxidation of ancient CH4‐derived carbon is not negligible on the global scale and could contribute to deepwater acidification over longer time scales. This study was sponsored by U.S. Department of Energy (DE‐FE0028980, awarded to J. D. K; DE‐FE0026195 interagency agreement with C. D. R.). We thank ... |
format |
Article in Journal/Newspaper |
author |
Garcia-Tigreros, Fenix Leonte, Mihai Ruppel, Carolyn D. Ruiz-Angulo, Angel Joung, DongJoo Young, Benjamin Kessler, John D. |
author_facet |
Garcia-Tigreros, Fenix Leonte, Mihai Ruppel, Carolyn D. Ruiz-Angulo, Angel Joung, DongJoo Young, Benjamin Kessler, John D. |
author_sort |
Garcia-Tigreros, Fenix |
title |
Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the US Mid-Atlantic Bight |
title_short |
Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the US Mid-Atlantic Bight |
title_full |
Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the US Mid-Atlantic Bight |
title_fullStr |
Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the US Mid-Atlantic Bight |
title_full_unstemmed |
Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the US Mid-Atlantic Bight |
title_sort |
estimating the impact of seep methane oxidation on ocean ph and dissolved inorganic radiocarbon along the us mid-atlantic bight |
publisher |
American Geophysical Union |
publishDate |
2020 |
url |
https://hdl.handle.net/1912/26931 |
geographic |
Hudson |
geographic_facet |
Hudson |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Garcia-Tigreros, F., Leonte, M., Ruppel, C. D., Ruiz-Angulo, A., Joung, D. J., Young, B., & Kessler, J. D. (2021). Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the US Mid-Atlantic Bight. Journal of Geophysical Research: Biogeosciences, 126(1), e2019JG005621. doi:10.1029/2019JG005621 |
op_relation |
https://doi.org/10.1029/2019JG005621 Garcia-Tigreros, F., Leonte, M., Ruppel, C. D., Ruiz-Angulo, A., Joung, D. J., Young, B., & Kessler, J. D. (2021). Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the US Mid-Atlantic Bight. Journal of Geophysical Research: Biogeosciences, 126(1), e2019JG005621. https://hdl.handle.net/1912/26931 doi:10.1029/2019JG005621 |
op_doi |
https://doi.org/10.1029/2019JG005621 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
126 |
container_issue |
1 |
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1766157903429894144 |