The Open UniversitySkip to content
 

On the characteristics of internal tides and coastal upwelling behaviour in Marguerite Bay, west Antarctic Peninsula

Wallace, Margaret I.; Meredith, Michael P.; Brandon, Mark A.; Sherwin, Toby J.; Dale, Andrew and Clarke, Andrew (2008). On the characteristics of internal tides and coastal upwelling behaviour in Marguerite Bay, west Antarctic Peninsula. Deep-Sea Research Part II: Topical Studies in Oceanography, 55(18-19) pp. 2023–2040.

Full text available as:
[img]
Preview
PDF (Accepted Manuscript) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (3689Kb)
DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/j.dsr2.2008.04.033
Google Scholar: Look up in Google Scholar

Abstract

Internal waves and coastal upwelling have important roles in both physical oceanography and marine ecosystems, via processes such as mixing of water masses and transfer of heat and nutrients to biologically active layers. In this paper we use quasi-weekly hydrographic profiles and moored records of temperature, salinity and water velocity to investigate the nature of internal tides and coastal upwelling behaviour in northern Marguerite Bay at the western Antarctic Peninsula. Within Ryder Bay, a near-coastal site in northern Marguerite Bay, atmospherically-forced oscillations of the water column with periods around 2-7 days are observed, associated with wind-induced coastal upwelling and downwelling. Sea ice cover is seen to play a role in the seasonal suppression of these oscillations. Significant internal tides are also observed at this site. A range of processes are seen to be important in controlling internal tide variability, including changes in local stratification and sea ice conditions. Both diurnal and semi-diurnal internal tidal species are observed, despite the study region being poleward of the critical latitude for diurnal internal tides. This suggests that at least the diurnal internal tides are generated close to the study location, and we investigate likely sources. Our work adds understanding to how such phenomena are generated, and what controls their variability, in a region of rapid physical change and profound ecosystem importance.

Item Type: Journal Article
Copyright Holders: 2008 Elsevier Ltd.
ISSN: 0967-0645
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetNERC
Keywords: coastal upwelling; internal tides; sea ice; Antarctic Peninsula; Marguerite Bay
Academic Unit/Department: Science > Environment, Earth and Ecosystems
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 10588
Depositing User: Mark Brandon
Date Deposited: 20 Oct 2008 12:35
Last Modified: 21 Mar 2014 18:36
URI: http://oro.open.ac.uk/id/eprint/10588
Share this page:

Altmetrics

Scopus Citations

Actions (login may be required)

View Item
Report issue / request change

Policies | Disclaimer

© The Open University   + 44 (0)870 333 4340   general-enquiries@open.ac.uk