Pleistocene/Holocene climate change, re‐establishment of fluvial drainage network and increase in relief in the Swiss Alps
Pleistocene/Holocene climate change, re‐establishment of fluvial drainage network and increase in relief in the Swiss Alps
复制标题
更新世/全新世气候变化、河流排水网络的重建和瑞士阿尔卑斯山地势的增加
DOI：
10.1046/j.1365-3121.2003.00469.x
复制
发表时间：
2003
期刊：
影响因子：
2.4
通讯作者：
M. Hinderer
中科院分区：
文献类型：
--
作者：
F. Schlunegger;M. Hinderer
摘要本文介绍了瑞士河流的现代泥沙排放量及其与流域大小的关系。资料显示，中阿尔卑斯山脉的前陆地区经历了每年0.15毫米的剥蚀率，阿尔卑斯山核心地区经历了每年0.5毫米的剥蚀率。 然而，测绘表明，现代侵蚀只影响了阿尔卑斯山表面的30-50%，河流和相关的山坡过程集中在50-200米深的山谷中。这些山谷被切割进冰川表面。如果考虑到这种有限的侵蚀空间范围，则有效侵蚀率明显高于平均剥蚀率。这些有效速率等于或局部超过现代岩石隆起速率。这意味着与更新世/全新世气候变化有关的侵蚀过程的改变导致了局部尺度上的地形起伏的增加。然而，在流域尺度上，目前的地形似乎没有变化。
ABSTRACT Data are presented about modern sediment discharge of the Swiss rivers and related to the size of catchments. The information reveals that the Central Alps have experienced denudation rates of ≈0.15 mm yr−1 in the foreland, and ≈0.5 mm yr−1 in the Alpine core. Mapping, however, indicates that modern erosion only affects 30–50% of the Alpine surface, and that fluvial and associated hillslope processes have focused erosion in 50–200‐m‐deep valleys. These valleys are incised into the glacial surface. If this limited spatial extent of erosion is considered, then effective erosion rates are significantly higher than average denudation rates. These effective rates equal or locally exceed modern rates of rock uplift. This implies that the modification of erosional processes related to the Pleistocene/Holocene climate change has resulted in an increase in the relief at a local scale. At a drainage basin scale, however, the relief appears not to change at present.