The northern cordilleran ice sheet over the last 300,000 years: testing the role of moisture in arctic glaciation

过去30万年的北部科迪勒拉冰盖:测试水分在北极冰川作用中的作用

基本信息

  • 批准号:
    216911-2010
  • 负责人:
  • 金额:
    $ 1.46万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Discovery Grants Program - Individual
  • 财政年份:
    2013
  • 资助国家:
    加拿大
  • 起止时间:
    2013-01-01 至 2014-12-31
  • 项目状态:
    已结题

项目摘要

Climate change continues to be a global priority. Predictive models require reliable, long term, paleoclimate data to evaluate the accuracy of future predictions. The proposed research will provide paleoclimate data from Yukon Territory. A glacier complex termed the northern Cordilleran Ice Sheet repeatedly covered portions of Yukon over the last 2.6 million years. Yukon is unique in Canada because of its glaciated surfaces of great antiquity and large unglaciated area that forms the eastern limit of Beringia. The record of this ice sheet prior to 30 000 years is relatively poorly constrained. Across most of Canada, deposits from the last glaciation cover old glacial surfaces. In contrast, their exposure at the surface in Yukon allows us to use innovative dating techniques (such as Terrestrial Cosmogenic Nuclide exposure dating) to determine the age of the last ice cover. This helps us define periods of colder than present conditions, when glaciers covered much more of the landscape than during the last glacial period. Sediments relating to non-glacial periods located below and on top of these old glaciated surfaces can be examined for plant and insect fossils. By comparing these fossils to their present distribution, the paleoclimate can be estimated. Some of these non-glacial periods were warmer than present and can serve as a good analog for future global warming. In this instance, the past could be the key to the future. These non-glacial sediments can sometime be dated by the presence of volcanic ash beds, similar to what was produced by Mt. St. Helen's. Dating these glacial and non-glacial deposits is the most effective method of determining how climate change affected Yukon for the past 200,000 to 300,000 years.
气候变化仍然是一个全球优先事项。预测模型需要可靠的、长期的古气候数据来评估未来预测的准确性。拟议的研究将提供育空地区的古气候数据。在过去的260万年里,一个被称为北方科迪勒拉冰盖的冰川复合体反复覆盖着育空地区的部分地区。育空地区在加拿大是独一无二的,因为它的冰川表面非常古老,大面积的未冰川化地区形成了白令吉亚的东部界限。这片冰盖在30000年前的记录相对来说没有受到很好的限制。在加拿大的大部分地区,末次冰期的沉积物覆盖着古老的冰川表面。相比之下,它们在育空地区地表的暴露使我们能够使用创新的测年技术(如地球宇宙成因核素暴露测年)来确定最后一次冰盖的年龄。这有助于我们定义比现在更冷的时期,那时冰川覆盖的景观比上一次冰期要多得多。位于这些古老的冰川表面之下和之上的与非冰川时期有关的沉积物可以检查植物和昆虫化石。通过比较这些化石与它们现在的分布,可以估计古气候。其中一些非冰川时期比现在更温暖,可以作为未来全球变暖的一个很好的模拟。在这种情况下,过去可能是未来的关键。这些非冰川沉积物有时可以通过火山灰床的存在来确定年代,类似于Mt.圣海伦教堂确定这些冰川和非冰川沉积物的年代是确定气候变化如何影响育空地区在过去20万至30万年的最有效方法。

项目成果

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Ward, Brent其他文献

Pleistocene Glaciation of British Columbia

Ward, Brent的其他文献

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{{ truncateString('Ward, Brent', 18)}}的其他基金

Boundary condition controls on the timing and extent of Pleistocene glaciations in Yukon
边界条件对育空地区更新世冰川作用时间和范围的控制
  • 批准号:
    RGPIN-2018-06887
  • 财政年份:
    2022
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Boundary condition controls on the timing and extent of Pleistocene glaciations in Yukon
边界条件对育空地区更新世冰川作用时间和范围的控制
  • 批准号:
    RGPIN-2018-06887
  • 财政年份:
    2021
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Boundary condition controls on the timing and extent of Pleistocene glaciations in Yukon
边界条件对育空地区更新世冰川作用时间和范围的控制
  • 批准号:
    RGPIN-2018-06887
  • 财政年份:
    2020
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Boundary condition controls on the timing and extent of Pleistocene glaciations in Yukon
边界条件对育空地区更新世冰川作用时间和范围的控制
  • 批准号:
    RGPIN-2018-06887
  • 财政年份:
    2019
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Boundary condition controls on the timing and extent of Pleistocene glaciations in Yukon
边界条件对育空地区更新世冰川作用时间和范围的控制
  • 批准号:
    RGPIN-2018-06887
  • 财政年份:
    2018
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
The northern cordilleran ice sheet over the last 300,000 years: testing the role of moisture in arctic glaciation
过去30万年的北部科迪勒拉冰盖:测试水分在北极冰川作用中的作用
  • 批准号:
    216911-2010
  • 财政年份:
    2014
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
The northern cordilleran ice sheet over the last 300,000 years: testing the role of moisture in arctic glaciation
过去30万年的北部科迪勒拉冰盖:测试水分在北极冰川作用中的作用
  • 批准号:
    216911-2010
  • 财政年份:
    2012
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
The northern cordilleran ice sheet over the last 300,000 years: testing the role of moisture in arctic glaciation
过去30万年的北部科迪勒拉冰盖:测试水分在北极冰川作用中的作用
  • 批准号:
    216911-2010
  • 财政年份:
    2011
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
The northern cordilleran ice sheet over the last 300,000 years: testing the role of moisture in arctic glaciation
过去30万年的北部科迪勒拉冰盖:测试水分在北极冰川作用中的作用
  • 批准号:
    216911-2010
  • 财政年份:
    2010
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
Regional climatic controls on the growth, configuration and decay of the northern cordilleran ice sheet
区域气候对北部科迪勒拉冰盖的生长、构造和衰变的控制
  • 批准号:
    216911-2009
  • 财政年份:
    2009
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual

相似海外基金

Postdoctoral Fellowship: EAR-PF: Pairing on-and-offshore observations of paleo-ice streams to constrain and elucidate dynamics of the Cordilleran Ice Sheet (PISCES)
博士后奖学金:EAR-PF:将古冰流的陆上和海上观测配对,以限制和阐明科迪勒拉冰盖 (PISCES) 的动态
  • 批准号:
    2305317
  • 财政年份:
    2023
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Fellowship Award
Reconstructing subglacial meltwater dynamics of the last Cordilleran Ice Sheet
重建最后一个科迪勒拉冰盖的冰下融水动力学
  • 批准号:
    573697-2022
  • 财政年份:
    2022
  • 资助金额:
    $ 1.46万
  • 项目类别:
    University Undergraduate Student Research Awards
Reconstruction of the Middle to Late Pleistocene glaciation history of the southern Cordilleran Ice Sheet (Fraser Lowland, British Columbia) – a geochemical approach.
南部科迪勒拉冰盖(不列颠哥伦比亚省弗雷泽低地)中更新世中晚期冰川作用历史的重建——一种地球化学方法。
  • 批准号:
    438259922
  • 财政年份:
    2020
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Research Fellowships
Cosmogenic surface exposure dating of Cordilleran-Laurentide ice-sheet separation during the last deglaciation: implications for abrupt sea-level rise
末次冰消期科迪勒兰-劳伦泰德冰盖分离的宇宙成因表面暴露测年:对海平面突然上升的影响
  • 批准号:
    1552230
  • 财政年份:
    2016
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Standard Grant
The northern cordilleran ice sheet over the last 300,000 years: testing the role of moisture in arctic glaciation
过去30万年的北部科迪勒拉冰盖:测试水分在北极冰川作用中的作用
  • 批准号:
    216911-2010
  • 财政年份:
    2014
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
The northern cordilleran ice sheet over the last 300,000 years: testing the role of moisture in arctic glaciation
过去30万年的北部科迪勒拉冰盖:测试水分在北极冰川作用中的作用
  • 批准号:
    216911-2010
  • 财政年份:
    2012
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
The northern cordilleran ice sheet over the last 300,000 years: testing the role of moisture in arctic glaciation
过去30万年的北部科迪勒拉冰盖:测试水分在北极冰川作用中的作用
  • 批准号:
    216911-2010
  • 财政年份:
    2011
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
The northern cordilleran ice sheet over the last 300,000 years: testing the role of moisture in arctic glaciation
过去30万年的北部科迪勒拉冰盖:测试水分在北极冰川作用中的作用
  • 批准号:
    216911-2010
  • 财政年份:
    2010
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
The northern Cordilleran Ice Sheet over the last 300,000 years
过去 30 万年的北科迪勒拉冰盖
  • 批准号:
    400912-2010
  • 财政年份:
    2010
  • 资助金额:
    $ 1.46万
  • 项目类别:
    University Undergraduate Student Research Awards
Regional climatic controls on the growth, configuration and decay of the northern cordilleran ice sheet
区域气候对北部科迪勒拉冰盖的生长、构造和衰变的控制
  • 批准号:
    216911-2009
  • 财政年份:
    2009
  • 资助金额:
    $ 1.46万
  • 项目类别:
    Discovery Grants Program - Individual
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