| DOI: | 10.1002/2015GL064477
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| 论文题名: | Yardang evolution from maturity to demise |
| 作者: | Barchyn T.E.; Hugenholtz C.H.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9301
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| EISSN: | 1944-9032
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| 出版年: | 2015
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| 卷: | 42, 期:14 | | 起始页码: | 5865
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| 结束页码: | 5871
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| 语种: | 英语
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| 英文关键词: | abrasion
; aeolian processes
; erosion
; mineral dust
; yardangs
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| Scopus关键词: | Abrasion
; Erosion
; Long Term Evolution (LTE)
; Sediments
; Substrates
; Aeolian process
; Arid environments
; General theory
; Landscape evolutions
; Mineral dust
; Relative rates
; Substrate composition
; Yardangs
; Suspended sediments
; abrasion
; arid environment
; deflation
; denudation
; downcutting
; Earth
; eolian process
; long-term change
; Mars
; sediment analysis
; suspended sediment
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| 英文摘要: | Yardangs are enigmatic wind-parallel ridges sculpted by aeolian processes that are found extensively in arid environments on Earth and Mars. No general theory exists to explain the long-term evolution of yardangs, curtailing modeling of landscape evolution and dynamics of suspended sediment release. We present a hypothesis of yardang evolution using relative rates of sediment flux, interyardang corridor downcutting, yardang denudation, substrate erodibility, and substrate clast content. To develop and sustain yardangs, corridor downcutting must exceed yardang vertical denudation and deflation. However, erosion of substrate yields considerable quantities of sediment that shelters corridors, slowing downcutting. We model the evolution of yardangs through various combinations of rates and substrate compositions, demonstrating the life span, suspended sediment release, and resulting landscape evolution. We find that yardangs have a distinct and predictable evolution, with inevitable demise and unexpectedly dynamic and autogenic erosion rates driven by subtle differences in substrate clast composition. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938977257&doi=10.1002%2f2015GL064477&partnerID=40&md5=2494e47eee4466c06d3c026ad2660965
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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/8917
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Geography, University of Calgary, Calgary, AB, Canada
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| Recommended Citation: | |
Barchyn T.E.,Hugenholtz C.H.. Yardang evolution from maturity to demise[J]. Geophysical Research Letters,2015-01-01,42(14).
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