| 项目编号: | 1542950
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| 项目名称: | Development of an Air-droppable Goedetic-seismic Ice Penetrator for Response Studies of Antarctic Ice Shelves and Icebergs to Ocean Forcings |
| 作者: | Pedro Elosegui
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| 承担单位: | Massachusetts Institute of Technology
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| 批准年: | 2016
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| 开始日期: | 2016-03-15
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| 结束日期: | 2018-02-28
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| 资助金额: | 224996
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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: | ice shelf
; grounded-ice
; scientific device
; massive antarctic ice sheet
; few-day ice-field
; continental antarctic ice sheet
; on-ice footprint
; ice-ocean dynamic interaction
; tabular iceberg
; development
; ice-shelf
; ocean-floating margin
; oceanic forcing
; air-droppable geodetic-seismic ice penetrator
; ocean wave
; antarctic ice-shelf decay model
; antarctic ice-shelf glaciology
; geodetic-seismic ice penetrator
; response study
; ice penetrator
|
| 英文摘要: | Title: Development of an air-droppable geodetic-seismic ice penetrator for response studies of Antarctic ice shelves and icebergs to ocean forcings
Non-technical abstract:
The stability of the entire Antarctic glacial system depends critically on the stability of its ice shelves. Antarctic ice shelves, the ocean-floating margins of the massive Antarctic ice sheet, are showing signs of rapid decline. Ice shelf decay leads to increased discharge of grounded-ice to the ocean, and to mean sea-level rise. Ice shelf disintegration would drive the continental Antarctic ice sheet, in particular the West Antarctica section, to eventual collapse. Ocean waves may provide the tipping force necessary to trigger the failure of a thinned, mechanically weakened ice shelf. Monitoring how the ice shelves are responding to changing oceanic and atmospheric conditions is critically needed, but obtaining such measurements is technologically and logistically challenging. This award supports the development of novel technologies that can meet the challenge.
Technical abstract:
The project aims to address the observational gap that exists in Antarctic ice-shelf glaciology for timescales shorter than the few-day ice-fields provided by satellite geodesy and imagery. Through these efforts, a new scientific instrument will be devised and prototyped that closes the gap into the high-frequency (from monthly to sub-seconds) domain where ice shelves respond dynamically to oceanic forcings. This will be accomplished by integrating state-of-the-art GPS and seismometer sensors into a single broadband scientific instrument with data download capabilities in near-real time. This scientific device will be packaged into an ice penetrator that can be air-dropped onto an ice shelf (and tabular icebergs) from a helicopter. The technology readiness of this geodetic-seismic ice penetrator (GSIP) will be assessed based on verification of performance of a functional prototype through both laboratory and field trials. Having continuous, high-resolution GSIP observations of Antarctic ice shelves would provide meaningful constraints to Antarctic ice-shelf decay models, and contribute to an improved understanding of ice-ocean dynamic interactions. GSIPs would greatly simplify logistic challenges by expediting deployment, reduce the on-ice footprint in Antarctica, enhance current capabilities for in situ glaciological observations, and benefit the broader polar community. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/92701
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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: | |
Pedro Elosegui. Development of an Air-droppable Goedetic-seismic Ice Penetrator for Response Studies of Antarctic Ice Shelves and Icebergs to Ocean Forcings. 2016-01-01.
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