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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>Mihai Leonte</dc:contributor>
  <dc:contributor>Carolyn D. Ruppel</dc:contributor>
  <dc:contributor>Angel Ruiz-Angulo</dc:contributor>
  <dc:contributor>DoongJoo Joung</dc:contributor>
  <dc:contributor>Benjamin Young</dc:contributor>
  <dc:contributor>John D. Kessler</dc:contributor>
  <dc:creator>Fenix Garcia-Tigreros</dc:creator>
  <dc:date>2021</dc:date>
  <dc:description>&lt;div class="article-section__content en main"&gt;&lt;p&gt;Ongoing ocean warming can release methane (CH&lt;sub&gt;4&lt;/sub&gt;) currently stored in ocean sediments as free gas and gas hydrates. Once dissolved in ocean waters, this CH&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;can be oxidized to carbon dioxide (CO&lt;sub&gt;2&lt;/sub&gt;). While it has been hypothesized that the CO&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;produced from aerobic CH&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;oxidation could enhance ocean acidification, a previous study conducted in Hudson Canyon shows that CH&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;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 CH&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;seepage on CO&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;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 CH&lt;sub&gt;4&lt;/sub&gt;‐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 CH&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;concentration and active gas seepage. This suggests that aerobic CH&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;oxidation has a greater influence on the dissolved inorganic pool in areas where CH&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;concentrations are locally elevated, instead of displaying a cumulative effect downcurrent from widespread groupings of CH&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;seeps. An upper limit approximation of the input rate of ancient‐derived DIC into the waters overlying the northern U. S Mid‐Atlantic Bight further suggests that oxidation of ancient CH&lt;sub&gt;4&lt;/sub&gt;‐derived carbon is not negligible on the global scale and could contribute to deep‐water acidification over longer time scales.&lt;/p&gt;&lt;/div&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1029/2019JG005621</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>American Geophysical Union</dc:publisher>
  <dc:title>Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the U.S. mid‐Atlantic Bight</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>