| DOI: | 10.1002/2014GL060314
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| 论文题名: | Decameter thick remnant glacial ice deposits on Mars |
| 作者: | Conway S.J.; Balme M.R.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9870
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| EISSN: | 1944-9601
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| 出版年: | 2014
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| 卷: | 41, 期:15 | | 起始页码: | 5402
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| 结束页码: | 5409
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| 语种: | 英语
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| 英文关键词: | glacier
; ground ice
; gullies
; latitude-dependant mantle
; Mars
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| Scopus关键词: | Deposits
; Glaciers
; Landforms
; Poles
; Global inventories
; Global scale
; Ground ice
; gullies
; latitude-dependant mantle
; Mars
; Midlatitudes
; Volume estimates
; Crater wall
; Glacial ice
; Massive ices
; Orbital variations
; Thick layers
; Ice
; estimation method
; ice sheet
; ice thickness
; Martian atmosphere
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| 英文摘要: | On Mars, a smooth, draping unit - the "latitude-dependant mantle" (LDM), believed to comprise meter thick layers of dust and ice - extends from the midlatitudes to the poles, covering at least 23% of the surface. We show that the LDM can be 30m deep on pole-facing crater walls, and by measuring the erosional and depositional volumes of small gullies that incise these LDM deposits, we show that it must contain between 46% and 95% ice by volume. Extrapolating to a global scale, these deposits account for ∼10 4km3 of near-surface ice, doubling previous LDM volume estimates. Thick LDM deposits can be emplaced during the many orbital variation-driven climate excursions that occurred during the Amazonian period. We suggest that LDM deposits are similar to ice sheets composed of massive ice with a surface lag. Key Points Terrain-draping, latitude-dependant mantle (LDM) deposits are >46%vol. ice Our data show that LDM is up to 30m thick, doubling the global inventory of ice in the LDM LDM is "ice sheet" like melt of LDM similar to terrestrial ice-cored moraines © 2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905316798&doi=10.1002%2f2014GL060314&partnerID=40&md5=81e516e30b7f915935facc0de23b8ab5
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7134
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Physical Sciences, Open University, Milton Keynes, United Kingdom
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| Recommended Citation: | |
Conway S.J.,Balme M.R.. Decameter thick remnant glacial ice deposits on Mars[J]. Geophysical Research Letters,2014-01-01,41(15).
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