NDLI: Observations of the spatial structure of internal waves in a small mid-latitude lake

Content Provider	IEEE Xplore Digital Library
Author	Laval, B. Bird, J.S. Helland, P.D.
Copyright Year	1997
Description	Author affiliation: Sch. of Eng. Sci., Simon Fraser Univ., Burnaby, BC, Canada (Laval, B.)
Abstract	Internal waves are features of stratified waters that vary in space and time. Traditionally, such features have been investigated using data accumulated by an array of self-recording sensors. There are typically one or more moorings located in a study area, with each mooring having sensors located at several different depths. While the temporal resolution of data logged by each sensor is excellent, the spatial resolution of data recorded by such a system of sensors is usually poor. Having a sensor move through the water column is one way of improving the spatial resolution of data, but such data tends to have poor temporal resolution at any given location. With the goal of obtaining data with adequate spatial and temporal resolution to characterise internal waves, a study was undertaken that combines the temporal resolution provided by a traditional moored sensor array, with the spatial resolution of data collected by sensors moving across the study area. This study was conducted at Loon Lake, which is a small (1.5 km long and 0.5 km wide), deep (/spl sim/50 m) lake located near Maple Ridge, British Columbia, Canada. Direct measurements of the temperature structure within the thermocline were made with moored thermistor chains, as well as with a thermistor mounted on an autonomous underwater vehicle, or AUV. Two thermistor chains, each with six thermistors within the thermocline, were moored along the major axis of the lake for six weeks. A SeaBird SBE19 CTD was mounted onboard the Underwater Research Lab's PURLII AUV. On three separate days PURLII followed a sawtooth pattern within the thermocline, and along the major axis of the lake. These data were compared and contrasted to provide a comprehensive description of the internal temperature field.
Starting Page	235
Ending Page	240
File Size	793433
Page Count	6
File Format	PDF
ISBN	0780341082
DOI	10.1109/OCEANS.1997.634368
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-10-06
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lakes Spatial resolution Sensor arrays Sensor phenomena and characterization Sensor systems Temperature measurement Thermistors Binary search trees Birds Laboratories
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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