High Resolution Radar Profiling of Firn Stratigraphy in East Antarctia: The ITASE II Traverse from Victoria Land to South Pole Station
南极洲东部弗恩地层的高分辨率雷达剖面图:ITASE II 从维多利亚陆地到南极站的穿越
基本信息
- 批准号:0440533
- 负责人:
- 金额:$ 17.88万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Interagency Agreement
- 财政年份:2005
- 资助国家:美国
- 起止时间:2005-09-01 至 2009-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This award supports the acquisition of high resolution ground-penetrating radar (GPR) profiles as part of the ITASE-2 traverse, along a route in East Antarctica from Victoria Land to South Pole Station. The project will collect profiles of the firn stratigraphy to aid in the selection of coring sites, measure spatially averaged snow accumulation rates and determine the ice dynamics that cause the stratigraphy. The radar profiles from the GPR work will be correlated with ice core stratigraphy and GPS data obtained by others as part of the traverse. GPR will also be used for crevasse detection and traverse route safety but this is considered routine, based on experience from prior work.. The major GPR findings in stratigraphic dynamics from ITASE I are: 1) most 400-MHz horizons are separate and distinct wavelets that extend over 500 km; 2) horizons appear to be caused by the density contrasts across clusters of thin, double-layers of hoar and ice; and 3) the folding can be caused by differential accumulation processes and the interaction between differential wavelength and ice speed, all tempered by radar velocity pulldown. effects. This proposal is based on the hypothesis that the same processes that generate and fold reflection horizons in the relatively greater and warmer accumulation zone of West Antarctica, are also at work in the relatively lesser and far colder accumulation zone of East Antarctica, and will be detected despite the fact that the accumulation rates, in cm of firn at any density, are far less than the vertical resolution of the radar. The major objectives of this project are to test this hypothesis by searching for thin layer signatures, and evidence of folding caused by differential accumulation dynamics. Evidence will also be sought of tectonic folding, most likely caused by convergence within feeder areas for the glaciers of the Transantarctic Mountains, and of the small scale continuity of horizons. For each of the two field years, the funding will also support a student for 4 months, minor equipment purchases, travel, editing, publications and supplies. The student will be a temporary employee of USA CRREL to support him or her during the summer months.
该合同支持获取高分辨率探地雷达(GPR)剖面,作为ITASE-2导线的一部分,沿着东南极洲从维多利亚地到南极站的路线。该项目将收集地层剖面,以帮助选择取心地点,测量空间平均积雪率,并确定导致地层的冰动力学。GPR工作的雷达剖面将与冰芯地层学和其他人作为导线的一部分获得的GPS数据相关联。探地雷达也将用于裂缝探测和穿越路线安全,但这被认为是常规的,基于以前的工作经验。ITASE I在地层动力学方面的主要GPR发现是:1)大多数400-MHz层是独立的、不同的小波,延伸超过500 km;2)视界似乎是由薄的双层白冰群之间的密度差异造成的;3)褶皱是由不同的积累过程以及不同波长和冰速的相互作用引起的,这些都受到雷达速度下拉的抑制。效果。这一建议是基于这样一个假设,即在南极洲西部相对较大和较暖的积累带中产生和折叠反射层的相同过程,也在南极洲东部相对较小和较冷的积累带中起作用,尽管在任何密度下以厘米厚为单位的积累速率远远小于雷达的垂直分辨率,但仍将被探测到。该项目的主要目标是通过寻找薄层特征和由差异堆积动力学引起的折叠证据来验证这一假设。还将寻找构造褶皱的证据,这种褶皱很可能是由横贯南极山脉冰川补给区内的汇合引起的,并将寻找小尺度的层位连续性的证据。在两个实地年的每一年,这笔资金还将用于资助一名学生4个月的费用,用于购买小型设备、旅行、编辑、出版和用品。该学生将成为美国CRREL的临时雇员,以支持他或她在夏季的工作。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Steven Arcone其他文献
Steven Arcone的其他文献
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{{ truncateString('Steven Arcone', 18)}}的其他基金
Collaborative Research: Fluctuations of the West Antarctic Ice-Sheet in Relation to Lake History in Taylor Valley, Antarctica Since the Last Glacial Maximum
合作研究:自末次盛冰期以来西南极冰盖的波动与南极洲泰勒谷湖泊历史的关系
- 批准号:
0539983 - 财政年份:2006
- 资助金额:
$ 17.88万 - 项目类别:
Interagency Agreement
High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet
南极西部冰盖 ITASE 横断面下方冰雪地层的高分辨率雷达剖面图
- 批准号:
0088035 - 财政年份:2001
- 资助金额:
$ 17.88万 - 项目类别:
Interagency Agreement
High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet
南极西部冰盖 ITASE 横断面下方冰雪地层的高分辨率雷达剖面图
- 批准号:
9814589 - 财政年份:1999
- 资助金额:
$ 17.88万 - 项目类别:
Interagency Agreement
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新型抗噬菌体防御系统—RADAR系统的结构与功能研究
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High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet
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