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A-Z Index Organization
 

Near-Bottom Currents

Since near-bottom currents can be of particular interest to some applications, the BIO archive of current meter data has been searched to identify instruments were located within 10 meters of the bottom.

Due to uncertainties in the actual bathymetric and mooring depths, particularly for the older datasets, two categories of depth certainty have been defined. The instruments denoted as "Multiple" (red dots) have had the depth off bottom confirmed by referring to either the original mooring diagram or published results.  Instruments denoted as "Data" (green dots) rely solely on the water depth and mooring depth reported in the data file. There are 435 series representing 1742 data months. 
 

Near Bottom Current Meter Moorings
Ancrage des courantomètres près du fond


The current statistics provided include monthly maximum observed current speed (without regard to direction), magnitude and direction of the mean current and the variability as defined by the principal axis components. The variability is reported for both the observed data (denoted as High Frequency) and the data with tides removed (Low Frequency).  The principal axis analysis determines the orientation of the maximum and minimum variance and is a measure of the variability of the current. A month must have at least 5 days of data to be included in the statistics.

The data are provided in two files. The first file describes the mooring location, time period, instrument type and other associated meta-data. The second file contains the monthly statistics. The two files are related by the event specification (event_spec). The files are provided as both an Excel spreadsheet and as comma separated variables (csv) for import into other software packages. The complete times series for any location can be provided on our ftp server upon request by emailing us with a list of required event_specs. 

This work was supported by the (Canadian) Program on Energy Research and Development (PERD).

 

Download Datafiles .xls .csv

Mooring Locations

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Current Statistics

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  Last Updated : 2007-02-07 Important Notices