High frequency acoustic observations of episodic mixing events in Lunenburg Bay
AbstractHigh frequency backscatter observations recorded through acoustic current profilers and velocimeters at three locations within the Lunenberg Bay were analyzed. It was found that six periods of enhanced surface-intensified backscatter and three periods of enhanced scattering near the bottom occurred between 260-290 days. Local sheltering of wind and waves resulted in distinct data sets from each location for any given period of enhanced scattering to varying degrees. Wave height estimates were made using the data from the internally recording ADCP, which was equipped with a waves measurement package and calculated a spectrum every half hour, using 20 minutes of data sampled at 2 Hz. Wind speed measurements were made using a shore based anemometer on a 10m tower, which were reported every hour. The results show that the event at day 272, which was the focus of the preliminary investigations of the periodic events, corresponds to the arrival of Hurricane Juan at Halifax, NS.
Copyright on articles is held by the author(s). The corresponding author has the right to grant on behalf of all authors and does grant on behalf of all authors, a worldwide exclusive licence (or non-exclusive license for government employees) to the Publishers and its licensees in perpetuity, in all forms, formats and media (whether known now or created in the future)
i) to publish, reproduce, distribute, display and store the Contribution;
ii) to translate the Contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or, abstracts of the Contribution;
iii) to exploit all subsidiary rights in the Contribution,
iv) to provide the inclusion of electronic links from the Contribution to third party material where-ever it may be located;
v) to licence any third party to do any or all of the above.