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Numerical simulation of upwelling currents in pockmarks, and data from the Inner Oslofjord, Norway

Oyvind Hammer, Karen E Webb and Davy Depreiter UGent (2009) GEO-MARINE LETTERS. 29(4). p.269-275
abstract
The deflection of oceanic or tidal currents into pockmarks has been studied by both general threedimensional computational fluid dynamics simulations and acoustic measurements in a number of pockmarks in the Inner Oslofjord, Norway. The modeling demonstrates upstream convergence of flow lines, followed by upwelling over the pockmark. This upwelling is an effect of deflected regional currents, not of expulsion of fluids or gas from the seafloor, and is sufficiently strong to prevent the settling of fine particles. The field measurements, although noisy at low vertical velocities, are consistent with the hypothesis of upwelling. The reduction in sedimentation rate inferred over the pockmarks (relative to that of the flat surrounding seabed) can explain the maintenance, or even deepening of pockmarks in the absence of fluid or gas seepage. The current pattern may also have consequences for the marine biology of pockmarks.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
MAINE, SLOPE, BAY, DEPRESSIONS, NORWEGIAN TRENCH
journal title
GEO-MARINE LETTERS
Geo-Mar. Lett.
volume
29
issue
4
pages
269 - 275
Web of Science type
Article
Web of Science id
000268102400005
JCR category
GEOSCIENCES, MULTIDISCIPLINARY
JCR impact factor
1.552 (2009)
JCR rank
59/151 (2009)
JCR quartile
2 (2009)
ISSN
0276-0460
DOI
10.1007/s00367-009-0140-z
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1082901
handle
http://hdl.handle.net/1854/LU-1082901
date created
2010-12-05 11:14:51
date last changed
2016-12-19 15:44:33
@article{1082901,
  abstract     = {The deflection of oceanic or tidal currents into pockmarks has been studied by both general threedimensional computational fluid dynamics simulations and acoustic measurements in a number of pockmarks in the Inner Oslofjord, Norway. The modeling demonstrates upstream convergence of flow lines, followed by upwelling over the pockmark. This upwelling is an effect of deflected regional currents, not of expulsion of fluids or gas from the seafloor, and is sufficiently strong to prevent the settling of fine particles. The field measurements, although noisy at low vertical velocities, are consistent with the hypothesis of upwelling. The reduction in sedimentation rate inferred over the pockmarks (relative to that of the flat surrounding seabed) can explain the maintenance, or even deepening of pockmarks in the absence of fluid or gas seepage. The current pattern may also have consequences for the marine biology of pockmarks.},
  author       = {Hammer, Oyvind and Webb, Karen E and Depreiter, Davy},
  issn         = {0276-0460},
  journal      = {GEO-MARINE LETTERS},
  keyword      = {MAINE,SLOPE,BAY,DEPRESSIONS,NORWEGIAN TRENCH},
  language     = {eng},
  number       = {4},
  pages        = {269--275},
  title        = {Numerical simulation of upwelling currents in pockmarks, and data from the Inner Oslofjord, Norway},
  url          = {http://dx.doi.org/10.1007/s00367-009-0140-z},
  volume       = {29},
  year         = {2009},
}

Chicago
Hammer, Oyvind, Karen E Webb, and Davy Depreiter. 2009. “Numerical Simulation of Upwelling Currents in Pockmarks, and Data from the Inner Oslofjord, Norway.” Geo-marine Letters 29 (4): 269–275.
APA
Hammer, O., Webb, K. E., & Depreiter, D. (2009). Numerical simulation of upwelling currents in pockmarks, and data from the Inner Oslofjord, Norway. GEO-MARINE LETTERS, 29(4), 269–275.
Vancouver
1.
Hammer O, Webb KE, Depreiter D. Numerical simulation of upwelling currents in pockmarks, and data from the Inner Oslofjord, Norway. GEO-MARINE LETTERS. 2009;29(4):269–75.
MLA
Hammer, Oyvind, Karen E Webb, and Davy Depreiter. “Numerical Simulation of Upwelling Currents in Pockmarks, and Data from the Inner Oslofjord, Norway.” GEO-MARINE LETTERS 29.4 (2009): 269–275. Print.