DOI: 10.1016/j.quascirev.2017.04.015
Scopus记录号: 2-s2.0-85018933965
论文题名: Recent, climate-driven river incision rate fluctuations in the Mercantour crystalline massif, southern French Alps
作者: Petit C. ; Goren L. ; Rolland Y. ; Bourlès D. ; Braucher R. ; Saillard M. ; Cassol D.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 165 起始页码: 73
结束页码: 87
语种: 英语
Scopus关键词: Climate change
; Stream flow
; Tin
; Climatic oscillations
; Cosmogenic nuclides
; Geomorphological analysis
; Global temperatures
; Landscape evolutions
; Longitudinal profile
; Quaternary climate
; River tributaries
; Rivers
英文摘要: We present a new geomorphological analysis of the Tinée River tributaries in the southern French Alps based on numerical inverse and forward modelling of their longitudinal profiles. We model their relative uplift history with respect to the main channel, hence the incision rate history of this channel. Inverse models show that all tributaries have consistent incision rate histories with alternating high and low values. A comparison with global temperature curves shows that these variations correlate with quaternary climate changes. We suggest that during warm periods, a wave of regressive erosion propagates in the Tinée River, while its tributaries deeply incise their substratum to catch up with the falling base-level. We also show that the post 140 ka history of this landscape evolution is dominated by fluvial incision. We then perform forward models of river incision and simulate the incision of the Tinée River system over a time span of 600 ka. This model allows us to extract time and space incision rate variations of the Tinée River. With a background of a few mm.yr−1, incision rate can increase up to more than 1 cm yr−1 during short periods of time due to climatic oscillations. This result is compatible with published cosmogenic nuclide based dating, which evidenced incision rates from 0.2 to 24 mm yr−1. The part of the channel located between 12 and 20 km downstream from the source has undergone several periods of rapid incision rates, which could explain the steep hillslopes and the triggering of a landslide ∼10 ka ago. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59235
Appears in Collections: 过去全球变化的重建
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作者单位: Université Côte d'Azur, CNRS, OCA, IRD, Géoazur, France; Geological and Environmental Sciences, Ben Gurion University of the Negev, Beer-Sheva, Israel; Aix-Marseille Univ., CNRS, IRD, Coll. France, UM 34 CEREGE, Technopôle de l'Environnement Arbois-Méditerranée, BP80, Aix-en-Provence, France
Recommended Citation:
Petit C.,Goren L.,Rolland Y.,et al. Recent, climate-driven river incision rate fluctuations in the Mercantour crystalline massif, southern French Alps[J]. Quaternary Science Reviews,2017-01-01,165