Multiple water isotope proxy reconstruction of extremely low last glacial temperatures in Eastern Beringia (Western Arctic)
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- 作者：Trevor J. Portera ; b ; trevor.porter@utoronto.ca" class="auth_mail" title="E-mail the corresponding author ; Duane G. Froeseb ; Sarah J. Feakinsc ; Ilya N. Bindemand ; Matthew E. Mahonyb ; Brent G. Pautlere ; i ; Gert-Jan Reichartf ; g ; Paul T. Sanbornh ; Myrna J. Simpsoni ; j ; Johan W.H. Weijersf ; 1
- 关键词：Eastern Beringia ; Precipitation isotopes ; Temperature reconstruction ; Relict ice ; Hydrated volcanic glass shards ; Fossil plant waxes
- 刊名：Quaternary Science Reviews
- 出版年：2016
- 出版时间：1 April 2016
- 年：2016
- 卷：137
- 期：Complete
- 页码：113-125
- 全文大小：1156 K
文摘
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Multiple water isotopes proxies are used to constrain fractionations and paleotemperatures.
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The water-wax net fractionation for the δDwax of steppe-tundra plants was ∼ −59 ± 10‰.
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Relict ice, volcanic glass shards and plant waxes reveal depleted cold stage precipitation.
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Winter-spring climates were ∼ 14 ± 5 °C colder than today during the transitional MIS 3/2.
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MIS 4 to 2 annual climates were depressed to a maximum of ∼ 16–21 °C ± 5 °C below modern.