Skip to main content

Free Content Currents under land-fast ice in the Canadian Arctic Archipelago Part 1: Vertical velocities

Download Article:
 Download
(PDF 1,100.5 kb)
 

Abstract:

A 614 kHz acoustic Doppler current profiler was deployed through land-fast ice in Resolute Passage, in the Canadian Archipelago for 30 days in April and May 1992. It was demonstrated that in the mean, at tidal and at high frequencies the instrument was stable and aligned within 0.5° of vertical, permitting unambiguous measurement of the horizontal, and more importantly, the vertical velocity structure. The flow was dominated by tidal and high frequency (15 min period) oscillations. The K1 and M2 tidal currents were both approximately 10.0 cm s−1, oriented along-channel. The K1 component was constant with depth while the M2 component changed in magnitude and its sense of rotation. The corresponding vertical velocities showed maximum spectral power density in the semi-diurnal frequency band but were insignificant in the diurnal band. At high frequencies, 31 events, or groups of oscillations with vertical velocities greater than 3.5 cm s−1 were found. They were identified as finite amplitude internal waves trapped to the pycnocline, finite amplitude internal waves at greater depth (corresponding to a change in the density structure) and linear internal waves. The horizontal kinetic energy of the oscillations was dependent on the spring-neap tidal cycle. It is proposed that many were generated through interaction of the tidal flow with a compression ridge in the ice, located approximately 15 km from the measurement site.

Document Type: Research Article

DOI: http://dx.doi.org/10.1357/0022240943076795

Publication date: November 1, 1994

More about this publication?
  • The Journal of Marine Research publishes peer-reviewed research articles covering a broad array of topics in physical, biological and chemical oceanography. Articles that deal with processes, as well as those that report significant observations, are welcome. In the area of biology, studies involving coupling between ecological and physical processes are preferred over those that report systematics. Authors benefit from thorough reviews of their manuscripts, where an attempt is made to maximize clarity. The time between submission and publication is kept to a minimum; there is no page charge.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Ingenta Connect is not responsible for the content or availability of external websites
jmr/jmr/1994/00000052/00000006/art00003
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more