Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016GL072089 |
Climate's watermark in the geometry of stream networks | |
Seybold, Hansjorg1,2; Rothman, Daniel H.1; Kirchner, James W.2,3 | |
2017-03-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Switzerland |
英文摘要 | Branching stream networks are a ubiquitous feature of the Earth's surface, but the processes that shape them, and their dependence on the climate in which they grow, remain poorly understood. Research has mainly focused on climatic controls of channel incision rates, while the climatic influence on planform geometry has often been overlooked. Here we analyze nearly one million digitally mapped river junctions throughout the contiguous United States and show that branching angles vary systematically with climatic aridity. In arid landscapes, which are thought to be dominated by surface runoff erosion, junction angles average roughly 45 degrees in the driest places. Branching angles are systematically wider in humid regions, averaging roughly 72 degrees, which is the theoretically predicted angle for network growth in a diffusive field such as groundwater seepage. The correlation of mean junction angle with aridity is stronger than with topographic gradient, downstream concavity, or other geometric factors that have been proposed as controls of junction angles. Thus, it may be possible to identify channelization processes from stream network geometry in relict landscapes, such as those on Mars. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398183700026 |
WOS关键词 | JUNCTION ANGLES ; DRAINAGE ; STABILITY ; MODEL ; RATES |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/29026 |
专题 | 气候变化 |
作者单位 | 1.MIT, Lorenz Ctr, Dept Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA; 2.Swiss Fed Inst Technol, Dept Environm Syst Sci, Zurich, Switzerland; 3.Swiss Fed Res Inst WSL, Birmensdorf, Switzerland |
推荐引用方式 GB/T 7714 | Seybold, Hansjorg,Rothman, Daniel H.,Kirchner, James W.. Climate's watermark in the geometry of stream networks[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(5). |
APA | Seybold, Hansjorg,Rothman, Daniel H.,&Kirchner, James W..(2017).Climate's watermark in the geometry of stream networks.GEOPHYSICAL RESEARCH LETTERS,44(5). |
MLA | Seybold, Hansjorg,et al."Climate's watermark in the geometry of stream networks".GEOPHYSICAL RESEARCH LETTERS 44.5(2017). |
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