Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL075872 |
Abyssal Upwelling in Mid-Ocean Ridge Fracture Zones | |
Clement, Louis1,2; Thurnherr, Andreas M.1 | |
2018-03-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:5页码:2424-2432 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | Turbulence in the abyssal ocean plays a fundamental role in the climate system by sustaining the deepest branch of the overturning circulation. Over the western flank of the Mid-Atlantic Ridge in the South Atlantic, previously observed bottom-intensified and tidally modulated mixing of abyssal waters appears to imply a counterintuitive densification of deep and bottom waters. Here we show that inside fracture zones, however, turbulence is elevated away from the seafloor because of intensified downward propagating near-inertial wave energy, which decays below a subinertial shear maximum. Ray-tracing simulations predict a decay of wave energy subsequent to wave-mean flow interactions. The hypothesized wave-mean flow interactions drive a deep flow toward lighter densities of up to 0.6Sv over the mid-ocean ridge flank in the Brazil Basin, and the same process may also cause upwelling of abyssal waters in other ocean basins with mid-ocean ridges with fracture zones. |
英文关键词 | Mid-Atlantic Ridge fracture zones near-inertial waves turbulent mixing |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000428402400035 |
WOS关键词 | ANTARCTIC BOTTOM WATER ; NEAR-INERTIAL WAVE ; MID-ATLANTIC RIDGE ; SPATIAL VARIABILITY ; ROUGH TOPOGRAPHY ; INTERNAL WAVES ; BRAZIL BASIN ; OCEAN ; ENERGY ; PROPAGATION |
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/28295 |
专题 | 气候变化 |
作者单位 | 1.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA; 2.Natl Oceanog Ctr, Southampton, Hants, England |
推荐引用方式 GB/T 7714 | Clement, Louis,Thurnherr, Andreas M.. Abyssal Upwelling in Mid-Ocean Ridge Fracture Zones[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(5):2424-2432. |
APA | Clement, Louis,&Thurnherr, Andreas M..(2018).Abyssal Upwelling in Mid-Ocean Ridge Fracture Zones.GEOPHYSICAL RESEARCH LETTERS,45(5),2424-2432. |
MLA | Clement, Louis,et al."Abyssal Upwelling in Mid-Ocean Ridge Fracture Zones".GEOPHYSICAL RESEARCH LETTERS 45.5(2018):2424-2432. |
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