| 项目编号: | 1542930
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| 项目名称: | Mapping, Measuring and Modeling Geomorphology and Ice Change in Dronning Maud Land, Antarctica |
| 作者: | Jonathan Harbor
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| 承担单位: | Purdue University
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| 批准年: | 2016
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| 开始日期: | 2016-04-01
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| 结束日期: | 2020-03-31
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| 资助金额: | 488000
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| 资助来源: | US-NSF
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| 项目类别: | Continuing 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: | antarctic ice sheet
; change
; vertical change
; former ice level
; ice-marginal moraine
; potential future change
; ice sheet model
; dronning maud land
; past ice sheet configuration
; predictive ice sheet model
; western dronning maud land
; ice sheet
; large ice sheet
; past ice extent
; ice sheet behavior
; global sea level change
; past three-dimensional change
; ice elevation
; climate change
; ice-sheet surface change
; maximum ice surface elevation
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| 英文摘要: | Reconstructing and predicting the response of the Antarctic Ice Sheet to climate change is a major challenge facing the Earth Science community. Computer models of ice sheet behavior are central to addressing this challenge. In this project we will test and improve ice sheet models by comparing model predictions of past ice extent to the geologic record in Dronning Maud Land, Antarctica. This innovative project will collect key geologic data from mountains called nunataks that extend above current and former ice levels that can be used as "dipsticks" to reconstruct changes in ice elevation that will be used to improve the models. The end result will be both much better knowledge of past three-dimensional changes of the Antarctic Ice Sheet, and improved models that allow for more accurate simulations of potential future changes in the ice sheet.
This research will fill critical gaps in the geologic record of the pattern and timing of vertical changes in the East Antarctic Ice Sheet in western Dronning Maud Land, by focusing on areas that are critical for differentiating between possible models of past ice sheet configuration. Reconstruction of ice-sheet surface changes will involve mapping and cosmogenic nuclide dating of glacially sculpted bedrock, ice-marginal moraines, and erratic boulders at different elevations on nunataks. Patterns of 10Be, 26Al, 14C, and 21Ne concentrations and ratios will enable inferences about the timing and magnitude of changes in maximum ice surface elevations and periods of burial by non-erosive (cold-based) ice. Results will be integrated with data from other areas to provide insight into changes across the entire Antarctic Ice Sheet, and into the role of large ice sheets in climate evolution and global sea level changes. The field-based results will provide constraints against which predictive ice sheet models will be tested and improved, contributing to glaciology, climate and Quaternary science. Broader impacts of this study will also advance the development of the next generation of STEM students and polar scientists. While gaining experience in international collaboration, field and laboratory methods, data analysis, and modeling, two graduate students will work with teachers to develop, implement, and disseminate standards-based lesson plans for student activities linking this research to learning objectives for middle school science. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/92634
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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: | |
Jonathan Harbor. Mapping, Measuring and Modeling Geomorphology and Ice Change in Dronning Maud Land, Antarctica. 2016-01-01.
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