Secondary circulation associated with a shelfbreak front Public Deposited

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  • Evidence for secondary circulation associated with a shelfbreak front is obtained from a high resolution, cross-shelf section of hydrographic, optical and velocity fields. Convergence in the bottom boundary layer on the inshore side of the front and subsequent upwelling into the interior is evident by a mid-water region of suspended bottom material emanating from the foot of the front and extending to within 35 m of the surface, 80 m above bottom. Downwelling on the offshore side of the front in the upper water column is inferred from a 20-m downward bend of the subsurface phytoplankton layer. These observations are in agreement with recent model predictions for secondary circulation near an idealized shelfbreak front. Convergence in measured cross-shelf velocity at the foot of the front is consistent with upwelling of bottom material detected there. An estimate of 9±2m day¯1 of upwelling on the inshore side of the shelfbreak front is obtained, implying a transit time from the bottom to the surface of 10-16 days.
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  • Barth, J. A., Bogucki, D., Pierce, S. D. and Kosro, P. M., 1998, Secondary circulation associated with a shelfbreak front: Geophys. Res. Lett., v. 25, p. 2,761-2,764.
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  • description.provenance : Submitted by Mary Phan (mpscanner@gmail.com) on 2010-04-12T22:14:52Z No. of bitstreams: 1 Barth et al GRL 1998.pdf: 627324 bytes, checksum: c09c73636a321060d527c15ab7a53a83 (MD5)
  • Vol. 25 No. 15 (1998)
  • description.provenance : Made available in DSpace on 2010-04-12T22:34:05Z (GMT). No. of bitstreams: 1 Barth et al GRL 1998.pdf: 627324 bytes, checksum: c09c73636a321060d527c15ab7a53a83 (MD5) Previous issue date: 1998-08-01
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2010-04-12T22:34:05Z (GMT) No. of bitstreams: 1 Barth et al GRL 1998.pdf: 627324 bytes, checksum: c09c73636a321060d527c15ab7a53a83 (MD5)
  • Geophysical Research Letters

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