Arid
DOI10.1016/j.geomorph.2017.10.016
Review of erosion dynamics along the major N-S climatic gradient in Chile and perspectives
Carretier, S.1; Tolorza, V.2; Regard, V.1; Aguilar, G.3; Bermudez, M. A.4; Martinod, J.5; Guyot, J-L1; Herail, G.1; Riquelme, R.6
通讯作者Carretier, S.
来源期刊GEOMORPHOLOGY
ISSN0169-555X
EISSN1872-695X
出版年2018
卷号300页码:45-68
英文摘要

Chile is an elongated country, running in a north-south direction for more than 30 along a subduction zone. Its climate is progressively wetter and colder from north to south. This particular geography has been used positively by a growing number of studies to better understand the relationships between erosion processes and climate, land use, slope, tectonics, volcanism, etc. Here we review the erosion rates, factors, and dynamics over millennial to daily periods reported in the literature. In addition, 21 new catchment mean erosion rates (suspended sediment and Be-10) are provided, and previous suspended sediment-derived erosion rates are updated. A total of 485 local and catchment mean erosion rates are reported. Erosion rates vary between some of the smallest values on earth (10(-5) mm/a) to moderate values <= 0.5 mm/a compared to other active ranges. This review highlights strong limitations concerning the quantification of local erosion factors because of uncertainties in sampling point location, slope and rainfall data. For the mean erosion rates E for the millennial and decennial catchments, a model of the form E proportional to S/[1- S(0.6)(2)]R-alpha with alpha = [0.3, 0.8] accounts for 40 to 70% of the erosion variance, confirming a primary role of slope S compared to precipitation rate R over this time scale. Over the long-term, this review points to the long (5 to > 10 Ma) response time of rivers to surface uplift in north-central arid Chile. Over millennia, data provide evidence for the progressive contribution of extreme erosion events to millennial averages for drier climates, as well as the link between glacier erosion and glacier sliding velocity. In this period of time, a discrepancy exists between the long-term offshore sedimentological record and continental decennial or millennial erosion data, for which no single explanation appears. Still, little information is available concerning the magnitude of variation of millennial erosion rates. Over centuries, data show the variable role of groundwater in the dynamics of suspended load and document a decrease in erosion over hundreds of years, probably associated with historical harvesting. (C) 2017 Elsevier B.V. All rights reserved.


英文关键词Chile Erosion Climate Slope
类型Review
语种英语
国家France ; Chile ; Colombia
收录类别SCI-E
WOS记录号WOS:000418981700004
WOS关键词PORPHYRY COPPER-DEPOSIT ; SOUTH-CENTRAL CHILE ; NATIVE FOREST LOSS ; ATACAMA DESERT ; NORTHERN CHILE ; CENTRAL ANDES ; LATE MIOCENE ; COASTAL CORDILLERA ; DENUDATION RATES ; PATAGONIAN ANDES
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
来源机构French National Research Institute for Sustainable Development
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/209653
作者单位1.Univ Toulouse, CNRS, CNES, UPS,GET,IRD, Toulouse, France;
2.Univ Austral Chile, Valdivia, Chile;
3.Univ Chile, Fac Ciencias Fis & Matemat, Adv Min Technol Ctr, Santiago, Chile;
4.Univ Ibague, Fac Ciencias Nat & Matemat, Ibague, Colombia;
5.Univ Savoie, CNRS, IRD, ISTerre, Le Bourget Du Lac, France;
6.Univ Catolica Norte, Dept Ciencias Geol, Antofagasta, Chile
推荐引用方式
GB/T 7714
Carretier, S.,Tolorza, V.,Regard, V.,et al. Review of erosion dynamics along the major N-S climatic gradient in Chile and perspectives[J]. French National Research Institute for Sustainable Development,2018,300:45-68.
APA Carretier, S..,Tolorza, V..,Regard, V..,Aguilar, G..,Bermudez, M. A..,...&Riquelme, R..(2018).Review of erosion dynamics along the major N-S climatic gradient in Chile and perspectives.GEOMORPHOLOGY,300,45-68.
MLA Carretier, S.,et al."Review of erosion dynamics along the major N-S climatic gradient in Chile and perspectives".GEOMORPHOLOGY 300(2018):45-68.
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