eprintid: 96866
rev_number: 54
eprint_status: archive
userid: 608
dir: disk0/00/09/68/66
datestamp: 2010-10-19 12:02:35
lastmod: 2021-09-19 22:25:41
status_changed: 2012-02-22 09:56:51
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: McDonald, NR
creators_name: Johnson, ER
title: Gap-Leaping Vortical Currents
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F59
keywords: WESTERN BOUNDARY CURRENT, POTENTIAL VORTICITY, COASTAL CURRENTS, UNIMAK PASS, FLOW, DYNAMICS, MOTION, VORTEX, TOPOGRAPHY, BARRIERS
note: © Copyright 2009 American Meteorological Society
abstract: A one-parameter family of exact solutions describing the bifurcation of a steady two-dimensional current with uniform vorticity near a gap in a thin barrier is found. The unsteady evolution of source-driven flows toward these steady states is studied using a version of contour dynamics, appropriately modified to take into account the presence of a barrier with a single gap. It is shown that some of the steady solutions are realizable as large-time limits of the source-driven flows, although some are not owing to persistent eddy-shedding events in the vicinity of the gap. For the special case when there is zero net flux through the gap, numerical experiments show that the through-gap flux of vortical fluid increases with the width of the gap and that this flux approaches a steady limit with time.
date: 2009-10
publisher: AMER METEOROLOGICAL SOC
official_url: http://dx.doi.org/10.1175/2009JPO4191.1
vfaculties: VMPS
oa_status: green
language: eng
primo: open
primo_central: open_green
article_type_text: Article
verified: verified_manual
elements_source: Web of Science
elements_id: 119669
doi: 10.1175/2009JPO4191.1
language_elements: EN
lyricists_name: Johnson, Edward
lyricists_name: McDonald, Nicholas
lyricists_id: ERJOH80
lyricists_id: NRMCD79
full_text_status: public
publication: Journal of Physical Oceanography
volume: 39
number: 10
pagerange: 2665 - 2674
issn: 0022-3670
citation:        McDonald, NR;    Johnson, ER;      (2009)    Gap-Leaping Vortical Currents.                   Journal of Physical Oceanography , 39  (10)   2665 - 2674.    10.1175/2009JPO4191.1 <https://doi.org/10.1175/2009JPO4191.1>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/96866/1/2009jpo4191%25252E1.pdf