Shaw, Jean-Luc; Bourgault, Daniel; Dumont, Dany; Lefaivre, Denis (2022): Passive surface drifter data in the bay of Sept-Îles in 2003 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.945074, In: Shaw, J-L et al. (2022): Physical oceanographic data in the bay of Sept-Îles [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.945160
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Abstract:
Lagrangian drift data were gathered by Denis Lefaivre in the Bay of Sept-Îles in 2003 as part of work for the Department of Fisheries and Oceans, Canada (DFO). The drifters were deployed from the small DFO boat Barachois, and consisted of 2 m long by 10.16 cm wide PVC tubes. These were weighted on one end and affixed with a 22.86 cm ring 20 cm from the other, to increase stability. Positions were recorded every 2 minutes by a GPS emitter inside the top 20 cm of the tube, which remained above water. Sampling was done from September 9 to 11, 2003.
Related to:
Shaw, Jean-Luc (2019): Hydrodynamique de la baie de Sept-Îles [thesis]. M. Sc Thesis, Université du Québec à Rimouski, 74
Shaw, Jean-Luc; Bourgault, Daniel; Dumont, Dany; Lefaivre, Denis (2022): Hydrodynamics of the Bay of Sept-Îles. Atmosphere-Ocean, https://doi.org/10.1080/07055900.2022.2141605
Project(s):
Canadian Healthy Oceans Network II (CHONe_II)
Coverage:
Median Latitude: 50.164844 * Median Longitude: -66.414155 * South-bound Latitude: 50.128781 * West-bound Longitude: -66.452533 * North-bound Latitude: 50.190051 * East-bound Longitude: -66.357144
Date/Time Start: 2003-09-09T12:09:58 * Date/Time End: 2003-09-11T17:23:28
Minimum DEPTH, water: 0 m * Maximum DEPTH, water: 0 m
Event(s):
imlba03_0_0 * Latitude Start: 50.183878 * Longitude Start: -66.371369 * Latitude End: 50.190051 * Longitude End: -66.376223 * Date/Time Start: 2003-09-09T14:06:48 * Date/Time End: 2003-09-09T15:24:48 * Elevation Start: -33.9 m * Elevation End: -30.4 m * Location: North Atlantic Ocean * Campaign: IMLBA03 * Basis: Barachois * Method/Device: Drifter (DRIFT)
imlba03_0_1 * Latitude Start: 50.183777 * Longitude Start: -66.383745 * Latitude End: 50.185863 * Longitude End: -66.382313 * Date/Time Start: 2003-09-11T16:27:55 * Date/Time End: 2003-09-11T16:49:55 * Elevation Start: -62.2 m * Elevation End: -56.8 m * Location: North Atlantic Ocean * Campaign: IMLBA03 * Basis: Barachois * Method/Device: Drifter (DRIFT)
imlba03_0_2 * Latitude Start: 50.166487 * Longitude Start: -66.421999 * Latitude End: 50.128781 * Longitude End: -66.421757 * Date/Time Start: 2003-09-10T11:22:54 * Date/Time End: 2003-09-10T17:18:55 * Elevation Start: -17.9 m * Elevation End: -62.2 m * Location: North Atlantic Ocean * Campaign: IMLBA03 * Basis: Barachois * Method/Device: Drifter (DRIFT)
Comment:
Description
-----------
These drifts were gathered by Denis Lefaivre in 2003, as part of work for the Department of Fisheries and Oceans, Canada (DFO). The longitude, latitudes and time were automatically recorded and were processed to obtain the following parameters:
* longitude (degrees east)
* latitude (degrees north)
* datenum UTC (days since January 0, 0000)
* velocity east (meters / second)
* velocity north (meters / second)
* velocity magnitude (meters / second)
* velocity direction (compass degrees)
* time after high tide (hours)
* water depth (meters)
* time UTC
See the referred publication for information on data sets used to obtain these values.
These drifters were built from a 2 meter long PVC tube with the GPS beacon on one end, and weight at the other. The PVC tube was 4 inches in diameter. It was weighted such that 20 cm of the tube extended out of the water. A ring 9 inches in
diameter was fixed 20 cm from the beacon end of the tube. These drifters were estimated to be affected by currents in the surface 180 cm.
Processing
----------
Data quality was checked using a custom-made graphical user interface software. This software allowed removal positions on land as well as compensation for bad pings and missing pings. The data identified as good were interpolated to a regular time grid, and the velocity information was then calculated. All observations in this data set should be viewed as quality controlled. Flags indicate the start of the drift (DPL), the movement data (OCN), and the end of the drift (END).
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Shaw, Jean-Luc | |||
| 2 | LONGITUDE | Longitude | Shaw, Jean-Luc | Geocode | ||
| 3 | LATITUDE | Latitude | Shaw, Jean-Luc | Geocode | ||
| 4 | Time in days | Time | days | Shaw, Jean-Luc | Days since January 0, 0000 (Matlab serial date, UTC) | |
| 5 | Velocity, east | East vel | m/s | Shaw, Jean-Luc | Tubular PVC drifter 10 cm by 2 m | |
| 6 | Velocity, north | North vel | m/s | Shaw, Jean-Luc | Tubular PVC drifter 10 cm by 2 m | |
| 7 | Velocity magnitude | Vel mag | m/s | Shaw, Jean-Luc | Tubular PVC drifter 10 cm by 2 m | |
| 8 | Velocity direction | Vel dir | deg | Shaw, Jean-Luc | Tubular PVC drifter 10 cm by 2 m | |
| 9 | Validation flag/comment | Flag comm | Shaw, Jean-Luc | DPL: start of the drift, OCN: movement data, END: end of the drift | ||
| 10 | Time in hours | Time | h | Shaw, Jean-Luc | Time after high tide | |
| 11 | DEPTH, water | Depth water | m | Shaw, Jean-Luc | Geocode | |
| 12 | DATE/TIME | Date/Time | Shaw, Jean-Luc | Geocode | ||
| 13 | Deployment number | Deploy no | Shaw, Jean-Luc | Drift |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 2 (ProcLevel2)
Size:
12596 data points
Download Data
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