Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41561-020-0611-4 |
Late Cenozoic climate change paces landscape adjustments to Yukon River capture | |
Bender, Adrian M.1; Lease, Richard O.1; Corbett, Lee B.2; Bierman, Paul R.2; Caffee, Marc W.3,4; Rittenour, Tammy M.5,6 | |
2020-07-20 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2020 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | USA |
英文摘要 | Late Cenozoic cooling and changes in glacial-interglacial cycle tempo are thought to increase global rates of erosion starting similar to 3 million years ago (Ma). Bedrock rivers set rates and patterns of erosion in most landscapes, but constraints on river response to late Cenozoic climate change remain elusive. Here, we determine cosmogenic isotope and luminescence ages of well-preserved bedrock terraces along the Fortymile River (Yukon River basin) to reconstruct an similar to 5 Myr history of fluvial adjustment to late Cenozoic climate and Yukon River headwater capture at 2.6 Ma. Post-capture Yukon River downcutting lowered the Fortymile River outlet, forcing subsequent bedrock incision throughout the Fortymile basin in two pulses, from 2.4 to 1.8 Ma and at similar to 1 Ma. These pulses of incision disrupted longer intervals of slow river channel sedimentation under near-consistent climate forcing from 4.8 to 2.4 Ma and from 1.8 to similar to 1 Ma. The Fortymile River delivers sediment to the Bering Sea, where provenance and accumulation rate changes since 4.3 Ma match observed variations in incision. Our results link alluviation and incision to late Cenozoic climate steadiness and change, respectively, and support the hypothesis that climate-forced changes in precipitation and runoff fundamentally control the pace of river incision and landscape erosion. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000550636300001 |
WOS关键词 | EROSION RATES ; TOPOGRAPHIC ANALYSIS ; SHORT COMMUNICATION ; ROCK UPLIFT ; LOW-RELIEF ; INCISION ; SEDIMENT ; BE-10 ; ACCUMULATION ; STABILITY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/286771 |
专题 | 地球科学 气候变化 |
作者单位 | 1.US Geol Survey, Alaska Sci Ctr, Anchorage, AK 99508 USA; 2.Univ Vermont, Dept Geol, Burlington, VT USA; 3.Purdue Univ, Dept Phys & Astron, W Lafayette, IL USA; 4.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IL USA; 5.Utah State Univ, Dept Geosci, Logan, UT 84322 USA; 6.Utah State Univ, USU Luminescence Lab, Logan, UT 84322 USA |
推荐引用方式 GB/T 7714 | Bender, Adrian M.,Lease, Richard O.,Corbett, Lee B.,et al. Late Cenozoic climate change paces landscape adjustments to Yukon River capture[J]. NATURE GEOSCIENCE,2020. |
APA | Bender, Adrian M.,Lease, Richard O.,Corbett, Lee B.,Bierman, Paul R.,Caffee, Marc W.,&Rittenour, Tammy M..(2020).Late Cenozoic climate change paces landscape adjustments to Yukon River capture.NATURE GEOSCIENCE. |
MLA | Bender, Adrian M.,et al."Late Cenozoic climate change paces landscape adjustments to Yukon River capture".NATURE GEOSCIENCE (2020). |
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