| DOI: | 10.1002/2014GL060677
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| 论文题名: | Erosion dynamics following localized permafrost slope disturbances |
| 作者: | Lamoureux S.F.; Lafrenière M.J.; Favaro E.A.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9892
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| EISSN: | 1944-9623
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| 出版年: | 2014
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| 卷: | 41, 期:15 | | 起始页码: | 5499
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| 结束页码: | 5505
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| 语种: | 英语
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| 英文关键词: | Arctic
; permafrost
; sediment yield
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| Scopus关键词: | Catchments
; Permafrost
; Runoff
; Sediments
; Arctic
; Catchment response
; Downstream channels
; Equilibrium state
; Geomorphic evolution
; Morphological evolution
; Sediment concentration
; Sediment yields
; Channel density
; Erosion dynamics
; Sediment erosion
; Erosion
; active layer
; catchment
; erosion rate
; heterogeneity
; permafrost
; slope failure
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| 英文摘要: | Slope disturbances are key sources of sediment, and the impact and recovery of disturbance on downslope erosion is poorly understood. We measured the erosional response of varying extents of slope disturbance in small permafrost catchments for 5years following disturbance by active layer detachments. Initial erosion rates increased with the size of disturbance, but subsequent fluxes depended on specific morphological evolution of disturbances. Varying degrees of (i) channel density within the disturbances, (ii) downstream channel connectivity, and (iii) geomorphic evolution of disturbances lead to significant differences in catchment response to disturbance. Our results indicate that new equilibrium states of sediment erosion are achieved within the most disturbed and channelized catchments and contribute to greater heterogeneity of erosion on the landscape. Key Points Initially, sediment concentrations and yields scale with disturbed area Postdisturbance internal channelization sustains greater sediment flux Evolution of disturbance and channels generates long-term, heterogeneous yields © 2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905316245&doi=10.1002%2f2014GL060677&partnerID=40&md5=4618673d281e7080999f51931315a1dd
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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/7156
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Geography, Queen's University, Kingston, ON, Canada
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| Recommended Citation: | |
Lamoureux S.F.,Lafrenière M.J.,Favaro E.A.. Erosion dynamics following localized permafrost slope disturbances[J]. Geophysical Research Letters,2014-01-01,41(15).
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