Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.epsl.2018.02.026 |
Addressing the contribution of climate and vegetation cover on hillslope denudation, Chilean Coastal Cordillera (26 degrees-38 degrees S) | |
Schaller, M.1; Ehlers, T. A.1; Lang, K. A. H.1,2; Schmid, M.1; Fuentes-Espoz, J. P.3 | |
通讯作者 | Schaller, M. |
来源期刊 | EARTH AND PLANETARY SCIENCE LETTERS
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ISSN | 0012-821X |
EISSN | 1385-013X |
出版年 | 2018 |
卷号 | 489页码:111-122 |
英文摘要 | The Earth surface is modulated by interactions among tectonics, climate, and biota. The influence of each of these factors on hillslope denudation rates is difficult to disentangle. The Chilean Coastal Cordillera offers a strong climate and vegetation gradient from arid and unvegetated in the North to humid and vegetated in the South. A similar (convergent) plate tectonic boundary lies to the West of the Coastal Cordillera. We present eight depth profiles analyzed for in situ-produced cosmogenic Be-10 in four study areas. These profiles reveal denudation rates of soil-mantled hillslopes and the depth of mobile layers. Depth profiles were investigated from both S- and N-facing mid-slope positions. Results indicate the depth of the mobile layers in the four study areas increase from N to S in latitude. When mixing is present in the mobile layers they are completely mixed. In the S- and N-facing hillslopes of each study area, mid-slope positions do not show a systematic change in depth of the mobile layers nor in denudation rates based on cosmogenic depth profiles. From N to S in latitude, modelled denudation rates of hillslopes increase from similar to 0.46 to similar to 5.65 cm/kyr and then decrease to similar to 3.22 cm/kyr in the southernmost, highest vegetation cover, study area. Calculated turnover times of soils decrease from 30 to similar to 11 kyr and then increase to similar to 22 kyr. In this work, the increasing denudation rates are attributed to increasing mean annual precipitation from N to S. However, despite the ongoing increase in precipitation from N to S, the denudation rate in the southernmost location does not continue to increase due to the protective nature of increasing vegetation cover. This indicates a vegetation induced non-linear relationship with denudation rates. (C) 2018 Elsevier B.V. All rights reserved. |
英文关键词 | denudation hillslope climate biota cosmogenic nuclide Chile |
类型 | Article |
语种 | 英语 |
国家 | Germany ; Sweden ; Chile |
收录类别 | SCI-E |
WOS记录号 | WOS:000430767500012 |
WOS关键词 | COSMOGENIC NUCLIDES ; EROSION RATES ; OCTODON-DEGUS ; HALF-LIFE ; BE-10 ; SEDIMENT ; REGOLITH ; RODENT ; FOREST ; UPLIFT |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/208601 |
作者单位 | 1.Univ Tubingen, Dept Geosci, Wilhelmstr 56, Tubingen, Germany; 2.Stockholm Univ, Dept Geol Sci, Svante Arrhenius Vag 8, S-10691 Stockholm, Sweden; 3.Univ Chile, Dept Silviculture & Nat Conservat, Av Santa Rosa 11315, La Pintana, Santiago Rm, Chile |
推荐引用方式 GB/T 7714 | Schaller, M.,Ehlers, T. A.,Lang, K. A. H.,et al. Addressing the contribution of climate and vegetation cover on hillslope denudation, Chilean Coastal Cordillera (26 degrees-38 degrees S)[J],2018,489:111-122. |
APA | Schaller, M.,Ehlers, T. A.,Lang, K. A. H.,Schmid, M.,&Fuentes-Espoz, J. P..(2018).Addressing the contribution of climate and vegetation cover on hillslope denudation, Chilean Coastal Cordillera (26 degrees-38 degrees S).EARTH AND PLANETARY SCIENCE LETTERS,489,111-122. |
MLA | Schaller, M.,et al."Addressing the contribution of climate and vegetation cover on hillslope denudation, Chilean Coastal Cordillera (26 degrees-38 degrees S)".EARTH AND PLANETARY SCIENCE LETTERS 489(2018):111-122. |
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