| 项目编号: | 1542756
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| 项目名称: | Holocene Deglaciation of the Western Ross Embayment: Constraints from East Antarctic Outlet Glaciers |
| 作者: | Michelle Koutnik
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| 承担单位: | University of Washington
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| 批准年: | 2016
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| 开始日期: | 2016-08-01
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| 结束日期: | 2019-07-31
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| 资助金额: | 335196
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Polar
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| 英文关键词: | holocene
; antarctic ice sheet
; holocene deglaciation
; outlet glacier
; ross sea embayment
; ross sea sector
; west antarctic ice stream
; transantarctic mountain
; west antarctica
; transantarctic outlet glacier
; east antarctic outlet glacier
; holocene retreat
; east antarctica
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| 英文摘要: | Reconstructions of past changes in thickness and extent of the Antarctic ice sheet are important for evaluating past and present sea-level change, and for validating numerical models necessary to make realistic predictions of changes under future climate and ocean conditions. Models estimate that the Ross Sea sector was one of the largest contributors to sea-level rise from Antarctica as the ice sheet adjusted during the past ten thousand years from the glacial period to the Holocene. In this sector, ice flow into the embayment comes through West Antarctic ice streams and through East Antarctic outlet glaciers that flow through the Transantarctic Mountains. Observational data constrain the last glacial maximum and the Holocene retreat, but models are necessary to understand the environmental conditions needed for outlet glaciers to reach observed high stands, to fit the observed patterns of retreat, and to understand how the contribution of ice from West Antarctica and from East Antarctica changed over time.
The investigators will use available geological and geophysical data in combination with forward ice-flow models and inverse models to investigate the evolution of the four Transantarctic outlet glaciers where sufficient data exist. The objectives of this new modeling are to constrain the glaciological conditions necessary for these glaciers to thicken during the last glacial, thin during the Holocene, and reach their present-day state. By testing specific hypotheses this work contributes to an interdisciplinary effort to understand Holocene deglaciation of the Ross Sea Embayment. In addition, the modeling will address the resolving power of the available data to answer key questions for each target glacier. Broader impacts include mentoring a graduate student, public outreach, incorporation of research into high-school and university classes, and support of an early-career investigator. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/91660
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Michelle Koutnik. Holocene Deglaciation of the Western Ross Embayment: Constraints from East Antarctic Outlet Glaciers. 2016-01-01.
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