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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>Terrence Blackburn</dc:contributor>
  <dc:contributor>Beth Elaine Caissie</dc:contributor>
  <dc:contributor>Jason A. Addison</dc:contributor>
  <dc:contributor>Zuzanna Stroynowski</dc:contributor>
  <dc:contributor>Maria R. Sipala</dc:contributor>
  <dc:contributor>Franco Marcantonio</dc:contributor>
  <dc:contributor>Ana Christina Ravelo</dc:contributor>
  <dc:creator>Kimberly A. deLong</dc:creator>
  <dc:date>2025</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;The Bølling-Allerød deglacial event is marked by high diatom productivity and opal deposition throughout the subarctic Pacific. This opal could either constitute a strengthened biological pump and thus carbon sequestration, or a weakened biological pump and release of marine-sequestered CO&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;to the atmosphere. We quantify silicic acid supply at IODP Site U1340 in the Bering Sea using biogenic opal and δ&lt;/span&gt;&lt;sup&gt;30&lt;/sup&gt;&lt;span&gt;Si of&amp;nbsp;&lt;/span&gt;&lt;i&gt;Coscinodiscus&lt;/i&gt;&lt;span&gt;, a diatom genus. These records, along with diatom environmental indicators, suggest the Bølling-Allerød had high silicic acid availability related to a shift from stratification to seasonal upwelling dynamics. We thus propose the primary cause of the high productivity event was increased macronutrient supply from vertical exchange that injected old, nutrient-rich, CO&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;-rich waters into the surface. Enhanced CO&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;release from the subarctic Pacific may help explain critical intervals of CO&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;rise that occur at the onsets of the Bølling-Allerød and PreBoreal.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1029/2024GL109614</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>American Geophysical Union</dc:publisher>
  <dc:title>Bølling-Allerød productivity in the subarctic Pacific driven by seasonal upwelling</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>