The contribution of atmospheric acid deposition to ocean acidification in the subtropical North Atlantic Ocean

The absorption of anthropogenic CO2 and atmospheric deposition of acidity can both contribute to the acidification of the global ocean. Rainfall pH measurements and chemical compositions monitored on the island of Bermuda since 1980, and a long-term seawater CO2 time-series (1983–2005) in the subtro...

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Published in:Marine Chemistry
Main Authors: Bates, Nicholas R., Peters, Andrew J.
Format: Article in Journal/Newspaper
Language:English
Published: 2007
Subjects:
Online Access:https://eprints.soton.ac.uk/357436/
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spelling ftsouthampton:oai:eprints.soton.ac.uk:357436 2023-07-30T04:05:10+02:00 The contribution of atmospheric acid deposition to ocean acidification in the subtropical North Atlantic Ocean Bates, Nicholas R. Peters, Andrew J. 2007-12-20 https://eprints.soton.ac.uk/357436/ English eng Bates, Nicholas R. and Peters, Andrew J. (2007) The contribution of atmospheric acid deposition to ocean acidification in the subtropical North Atlantic Ocean. Marine Chemistry, 107 (4), 547-558. (doi:10.1016/j.marchem.2007.08.002 <http://dx.doi.org/10.1016/j.marchem.2007.08.002>). Article PeerReviewed 2007 ftsouthampton https://doi.org/10.1016/j.marchem.2007.08.002 2023-07-09T21:49:16Z The absorption of anthropogenic CO2 and atmospheric deposition of acidity can both contribute to the acidification of the global ocean. Rainfall pH measurements and chemical compositions monitored on the island of Bermuda since 1980, and a long-term seawater CO2 time-series (1983–2005) in the subtropical North Atlantic Ocean near Bermuda were used to evaluate the influence of acidic deposition on the acidification of oligotrophic waters of the North Atlantic Ocean and coastal waters of the coral reef ecosystem of Bermuda. Since the early 1980's, the average annual wet deposition of acidity at Bermuda was 15 ± 14 mmol m? 2 year? 1, while surface seawater pH decreased by 0.0017 ± 0.0001 pH units each year. The gradual acidification of subtropical gyre waters was primarily due to uptake of anthropogenic CO2. We estimate that direct atmospheric acid deposition contributed 2% to the acidification of surface waters in the subtropical North Atlantic Ocean, although this value likely represents an upper limit. Acidifying deposition had negligible influence on seawater CO2 chemistry of the Bermuda coral reef, with no evident impact on hard coral calcification. Article in Journal/Newspaper North Atlantic Ocean acidification University of Southampton: e-Prints Soton Marine Chemistry 107 4 547 558
institution Open Polar
collection University of Southampton: e-Prints Soton
op_collection_id ftsouthampton
language English
description The absorption of anthropogenic CO2 and atmospheric deposition of acidity can both contribute to the acidification of the global ocean. Rainfall pH measurements and chemical compositions monitored on the island of Bermuda since 1980, and a long-term seawater CO2 time-series (1983–2005) in the subtropical North Atlantic Ocean near Bermuda were used to evaluate the influence of acidic deposition on the acidification of oligotrophic waters of the North Atlantic Ocean and coastal waters of the coral reef ecosystem of Bermuda. Since the early 1980's, the average annual wet deposition of acidity at Bermuda was 15 ± 14 mmol m? 2 year? 1, while surface seawater pH decreased by 0.0017 ± 0.0001 pH units each year. The gradual acidification of subtropical gyre waters was primarily due to uptake of anthropogenic CO2. We estimate that direct atmospheric acid deposition contributed 2% to the acidification of surface waters in the subtropical North Atlantic Ocean, although this value likely represents an upper limit. Acidifying deposition had negligible influence on seawater CO2 chemistry of the Bermuda coral reef, with no evident impact on hard coral calcification.
format Article in Journal/Newspaper
author Bates, Nicholas R.
Peters, Andrew J.
spellingShingle Bates, Nicholas R.
Peters, Andrew J.
The contribution of atmospheric acid deposition to ocean acidification in the subtropical North Atlantic Ocean
author_facet Bates, Nicholas R.
Peters, Andrew J.
author_sort Bates, Nicholas R.
title The contribution of atmospheric acid deposition to ocean acidification in the subtropical North Atlantic Ocean
title_short The contribution of atmospheric acid deposition to ocean acidification in the subtropical North Atlantic Ocean
title_full The contribution of atmospheric acid deposition to ocean acidification in the subtropical North Atlantic Ocean
title_fullStr The contribution of atmospheric acid deposition to ocean acidification in the subtropical North Atlantic Ocean
title_full_unstemmed The contribution of atmospheric acid deposition to ocean acidification in the subtropical North Atlantic Ocean
title_sort contribution of atmospheric acid deposition to ocean acidification in the subtropical north atlantic ocean
publishDate 2007
url https://eprints.soton.ac.uk/357436/
genre North Atlantic
Ocean acidification
genre_facet North Atlantic
Ocean acidification
op_relation Bates, Nicholas R. and Peters, Andrew J. (2007) The contribution of atmospheric acid deposition to ocean acidification in the subtropical North Atlantic Ocean. Marine Chemistry, 107 (4), 547-558. (doi:10.1016/j.marchem.2007.08.002 <http://dx.doi.org/10.1016/j.marchem.2007.08.002>).
op_doi https://doi.org/10.1016/j.marchem.2007.08.002
container_title Marine Chemistry
container_volume 107
container_issue 4
container_start_page 547
op_container_end_page 558
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