Slope-induced tidal straining

Analysis of rotational effects

Kirstin Schulz, Takahiro Endo, Lars Umlauf

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

Tidal straining is known to be an important factor for the generation of residual currents and transports of suspended matter in the coastal ocean. Recent modeling studies and field experiments have revealed a new type of “slope-induced” tidal straining, in which the horizontal density gradient required for this process is induced by the presence of a slope rather than by river runoff (as in classical tidal straining). Slope-induced tidal straining is investigated here with the help of an idealized numerical model, and results are compared to a recent data set from the East China Sea providing first direct observational evidence. The focus of this study is on the effect of rotation that was ignored in previous investigations. The model is shown to reproduce the key features of the observations, in particular the strain-induced generation of unstable stratification in the bottom boundary layer during periods of upslope flow. Rotation effects are found to significantly reduce the upslope tidal pumping of suspended material and also give rise to a newly identified pumping mechanism that results in a vigorous transport of suspended material along the slope. It is shown that slope-induced tidal straining is likely to be relevant for a wide range of oceanic slopes exposed to tidal motions.

元の言語英語
ページ(範囲)2069-2089
ページ数21
ジャーナルJournal of Geophysical Research: Oceans
122
発行部数3
DOI
出版物ステータス出版済み - 3 1 2017

Fingerprint

slopes
Runoff
Numerical models
Boundary layers
East China Sea
Rivers
pumping
runoff
oceans
rivers
benthic boundary layer
Experiments
drainage
stratification
effect
analysis
boundary layers
China
gradients
ocean

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Oceanography
  • Forestry
  • Aquatic Science
  • Ecology
  • Condensed Matter Physics
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Materials Chemistry
  • Palaeontology

これを引用

Slope-induced tidal straining : Analysis of rotational effects. / Schulz, Kirstin; Endo, Takahiro; Umlauf, Lars.

:: Journal of Geophysical Research: Oceans, 巻 122, 番号 3, 01.03.2017, p. 2069-2089.

研究成果: ジャーナルへの寄稿記事

Schulz, Kirstin ; Endo, Takahiro ; Umlauf, Lars. / Slope-induced tidal straining : Analysis of rotational effects. :: Journal of Geophysical Research: Oceans. 2017 ; 巻 122, 番号 3. pp. 2069-2089.
@article{8698312ec3104db28ccff0185339b9b5,
title = "Slope-induced tidal straining: Analysis of rotational effects",
abstract = "Tidal straining is known to be an important factor for the generation of residual currents and transports of suspended matter in the coastal ocean. Recent modeling studies and field experiments have revealed a new type of “slope-induced” tidal straining, in which the horizontal density gradient required for this process is induced by the presence of a slope rather than by river runoff (as in classical tidal straining). Slope-induced tidal straining is investigated here with the help of an idealized numerical model, and results are compared to a recent data set from the East China Sea providing first direct observational evidence. The focus of this study is on the effect of rotation that was ignored in previous investigations. The model is shown to reproduce the key features of the observations, in particular the strain-induced generation of unstable stratification in the bottom boundary layer during periods of upslope flow. Rotation effects are found to significantly reduce the upslope tidal pumping of suspended material and also give rise to a newly identified pumping mechanism that results in a vigorous transport of suspended material along the slope. It is shown that slope-induced tidal straining is likely to be relevant for a wide range of oceanic slopes exposed to tidal motions.",
author = "Kirstin Schulz and Takahiro Endo and Lars Umlauf",
year = "2017",
month = "3",
day = "1",
doi = "10.1002/2016JC012448",
language = "English",
volume = "122",
pages = "2069--2089",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "3",

}

TY - JOUR

T1 - Slope-induced tidal straining

T2 - Analysis of rotational effects

AU - Schulz, Kirstin

AU - Endo, Takahiro

AU - Umlauf, Lars

PY - 2017/3/1

Y1 - 2017/3/1

N2 - Tidal straining is known to be an important factor for the generation of residual currents and transports of suspended matter in the coastal ocean. Recent modeling studies and field experiments have revealed a new type of “slope-induced” tidal straining, in which the horizontal density gradient required for this process is induced by the presence of a slope rather than by river runoff (as in classical tidal straining). Slope-induced tidal straining is investigated here with the help of an idealized numerical model, and results are compared to a recent data set from the East China Sea providing first direct observational evidence. The focus of this study is on the effect of rotation that was ignored in previous investigations. The model is shown to reproduce the key features of the observations, in particular the strain-induced generation of unstable stratification in the bottom boundary layer during periods of upslope flow. Rotation effects are found to significantly reduce the upslope tidal pumping of suspended material and also give rise to a newly identified pumping mechanism that results in a vigorous transport of suspended material along the slope. It is shown that slope-induced tidal straining is likely to be relevant for a wide range of oceanic slopes exposed to tidal motions.

AB - Tidal straining is known to be an important factor for the generation of residual currents and transports of suspended matter in the coastal ocean. Recent modeling studies and field experiments have revealed a new type of “slope-induced” tidal straining, in which the horizontal density gradient required for this process is induced by the presence of a slope rather than by river runoff (as in classical tidal straining). Slope-induced tidal straining is investigated here with the help of an idealized numerical model, and results are compared to a recent data set from the East China Sea providing first direct observational evidence. The focus of this study is on the effect of rotation that was ignored in previous investigations. The model is shown to reproduce the key features of the observations, in particular the strain-induced generation of unstable stratification in the bottom boundary layer during periods of upslope flow. Rotation effects are found to significantly reduce the upslope tidal pumping of suspended material and also give rise to a newly identified pumping mechanism that results in a vigorous transport of suspended material along the slope. It is shown that slope-induced tidal straining is likely to be relevant for a wide range of oceanic slopes exposed to tidal motions.

UR - http://www.scopus.com/inward/record.url?scp=85015259308&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85015259308&partnerID=8YFLogxK

U2 - 10.1002/2016JC012448

DO - 10.1002/2016JC012448

M3 - Article

VL - 122

SP - 2069

EP - 2089

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 3

ER -