<?xml version='1.0' encoding='utf-8'?>
<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>David M. Hopkins</dc:contributor>
  <dc:creator>David S. McCulloch</dc:creator>
  <dc:date>1966</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;A&amp;nbsp;&lt;/span&gt;warm&lt;span&gt;&amp;nbsp;&lt;/span&gt;interval&lt;span&gt;&amp;nbsp;that began at least 10,000 years ago and lasted until at least 8300 years ago is recorded&amp;nbsp;&lt;/span&gt;in&lt;span&gt;&amp;nbsp;the coastal tundra covered area of&amp;nbsp;&lt;/span&gt;northwestern&lt;span&gt;&amp;nbsp;&lt;/span&gt;Alaska&lt;span&gt;&amp;nbsp;by the presence of fossil wood of tree size or tree species, fossil beaver-gnawed wood found beyond the modern range of beaver,&amp;nbsp;&lt;/span&gt;evidence&lt;span&gt;&amp;nbsp;of ice-wedge melting, buried soils, and soils that extend below the top of modern permafrost. Dating of the&amp;nbsp;&lt;/span&gt;warm&lt;span&gt;&amp;nbsp;&lt;/span&gt;interval&lt;span&gt;&amp;nbsp;is based on eight radiocarbon dates. Although these do not provide tight control for either the beginning or the end, they permit the interpretation that the&amp;nbsp;&lt;/span&gt;warm&lt;span&gt;&amp;nbsp;event began at the start of the worldwide, postglacial warming and that it ended at the time of the Anivik Lake glacial readvance&amp;nbsp;&lt;/span&gt;in&lt;span&gt;&amp;nbsp;the Brooks Range. If this is correct, the&amp;nbsp;&lt;/span&gt;early&lt;span&gt;&amp;nbsp;&lt;/span&gt;Recent&lt;span&gt;&amp;nbsp;&lt;/span&gt;warm&lt;span&gt;&amp;nbsp;&lt;/span&gt;interval&lt;span&gt;&amp;nbsp;and the "postglacial thermal maximum" recognized by Livingstone&amp;nbsp;&lt;/span&gt;in&lt;span&gt;&amp;nbsp;the Brooks Range were separated by a period of cooler climate. Deposits 7200 and 3600 years old also record moments when the climate was warmer than at present&amp;nbsp;&lt;/span&gt;in&lt;span&gt;&amp;nbsp;coastal&amp;nbsp;&lt;/span&gt;northwestern&lt;span&gt;&amp;nbsp;&lt;/span&gt;Alaska&lt;span&gt;. Although these may record a continuation of the&amp;nbsp;&lt;/span&gt;early&lt;span&gt;&amp;nbsp;&lt;/span&gt;Recent&lt;span&gt;&amp;nbsp;&lt;/span&gt;warm&lt;span&gt;&amp;nbsp;period, it seems more likely that they represent later and separate brief intervals of warmer climate. A postglacial thermal maximum between 6000 and 3000 years ago is recorded by pollen profiles&amp;nbsp;&lt;/span&gt;in&lt;span&gt;&amp;nbsp;the Brooks Range, but is not clearly recorded&amp;nbsp;&lt;/span&gt;in&lt;span&gt;&amp;nbsp;the coastal areas of&amp;nbsp;&lt;/span&gt;northwestern&lt;span&gt;&amp;nbsp;&lt;/span&gt;Alaska&lt;span&gt;. We suggest that as sea level rose to near its present position, the accompanying maritime climate lowered summer temperatures&amp;nbsp;&lt;/span&gt;in&lt;span&gt;&amp;nbsp;this coastal area during the time at which areas farther inland were experiencing the high temperatures of the postglacial thermal maximum.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1130/0016-7606(1966)77[1089:EFAERW]2.0.CO;2</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Geological Society of America</dc:publisher>
  <dc:title>Evidence for an early recent warm interval in northwestern Alaska</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>