气候变化领域集成服务门户(CCPortal): Internal Tide-Driven Tracer Transport Across the Continental Slope

CCPortal

DOI	10.1029/2019JC015530
	Internal Tide-Driven Tracer Transport Across the Continental Slope
	Spingys C.P.; Williams R.G.; Hopkins J.E.; Hall R.A.; Green J.A.M.; Sharples J.
发表日期	2020
ISSN	21699275
卷号	125 期号:9
英文摘要	The role of the internal tide in driving tracer transport across the continental slope is examined using simplified layered theory, channel model experiments, and observational diagnostics of near shelf-edge moorings. The effect of the internal tide is interpreted in terms of its Stokes' drift, which is separated into two distinct components: a bolus component, driven by the covariance of layer thickness and the velocity, and a shear component, driven by the velocity following the movement of an interface. For a three-layer ocean, in the model experiments and observations, the onshore propagation of an internal tide drives a Stokes' transport directed onshore in the surface and the bottom layers and directed offshore in the pycnocline. This reversing structure is due to the bolus component dominating near the boundaries, while the shear component dominates at the pycnocline. In the observational diagnostics, the Stokes' transport is not canceled by the Eulerian transport, which is mainly directed along bathymetric contours. The Stokes' drift of the internal tide then provides a systematic on shelf tracer transport if there is a tracer sink on the shelf, carried in the surface or bottom layers. Conversely, the tracer transport is directed offshore if there is a tracer source on the shelf with plumes of shelf tracer expected to be carried offshore along the pycnocline. This tracer transport as a result of the internal tide is diagnosed for heat, salt, and nitrate. The depth-integrated nitrate flux is directed onto the shelf supplying nutrients to the productive shelf seas. ©2020. The Authors.
英文关键词	exchange; internal tide; moorings; nitrate; shelf edge; Stokes' transport
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186695
作者单位	Department of Earth, Ocean and Ecological Sciences, School of Environmental Science, University of Liverpool, Liverpool, United Kingdom; Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton, United Kingdom; National Oceanography Centre, Liverpool, United Kingdom; Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; School of Ocean Sciences, Bangor University, Bangor, United Kingdom
推荐引用方式 GB/T 7714	Spingys C.P.,Williams R.G.,Hopkins J.E.,et al. Internal Tide-Driven Tracer Transport Across the Continental Slope[J],2020,125(9).
APA	Spingys C.P.,Williams R.G.,Hopkins J.E.,Hall R.A.,Green J.A.M.,&Sharples J..(2020).Internal Tide-Driven Tracer Transport Across the Continental Slope.Journal of Geophysical Research: Oceans,125(9).
MLA	Spingys C.P.,et al."Internal Tide-Driven Tracer Transport Across the Continental Slope".Journal of Geophysical Research: Oceans 125.9(2020).