Shaw, Jean-Luc; Bourgault, Daniel; Dumont, Dany; Lefaivre, Denis (2022): Passive surface drifter data in the bay of Sept-Îles in 2017-2018 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.945104, 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
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Lagrangian drift data were gathered in the Bay of Sept-Îles during the Spring and Summer in 2017 and 2018, as part of the Canadian Healthy Oceans Network (CHONe II) program. The drifters were deployed from shore and from two local fishing vessels: the Monica and Yvan-Raymond. The drifters consisted of a Spot Trace GPS emitter fixed on a wooden circular base 30 cm in diameter with a 0.9 kg weight attached to the opposite side to ensure that the emitter stays above water. Positions were recorded every 10 minutes. Data remaining persistently at low depth (<2 m) and low speed (<5 cm s-1) were considered shoaled and removed. A purpose-built graphical user interface program was used to remove GPS points on land or on the boat, and separate the GPS traces of each device into continuous movements (uninterrupted by shoaling). Positions were linearly interpolated to a 10 minute grid after quality control.
Related to:
Shaw, Jean-Luc (2019): Hydrodynamique de la baie de Sept-Îles. 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: 49.992697 * Median Longitude: -66.329848 * South-bound Latitude: 48.395184 * West-bound Longitude: -66.990664 * North-bound Latitude: 50.266030 * East-bound Longitude: -63.736263
Date/Time Start: 2017-05-05T16:07:37 * Date/Time End: 2018-06-25T18:47:32
Minimum DEPTH, water: 0 m * Maximum DEPTH, water: 0 m
Event(s):
ismfj18_2_0 * Latitude Start: 50.262190 * Longitude Start: -66.455560 * Latitude End: 50.164809 * Longitude End: -66.471264 * Date/Time Start: 2018-05-17T03:48:53 * Date/Time End: 2018-05-17T16:28:53 * Elevation Start: -56.9 m * Elevation End: -4.1 m * Location: South Atlantic Ocean * Campaign: ISMFJ18 * Basis: F. J. Saucier * Method/Device: Drifter GPS SPOT Trace (GPS_SPOT)
ismfj18_2_1 * Latitude Start: 50.263260 * Longitude Start: -66.454590 * Latitude End: 50.164773 * Longitude End: -66.484530 * Date/Time Start: 2018-05-17T03:47:13 * Date/Time End: 2018-05-17T13:27:13 * Elevation Start: -39.7 m * Elevation End: -2.1 m * Location: South Atlantic Ocean * Campaign: ISMFJ18 * Basis: F. J. Saucier * Method/Device: Drifter GPS SPOT Trace (GPS_SPOT)
ismfj18_2_2 * Latitude Start: 50.263440 * Longitude Start: -66.454380 * Latitude End: 50.160111 * Longitude End: -66.452153 * Date/Time Start: 2018-05-17T03:56:13 * Date/Time End: 2018-05-17T16:56:13 * Elevation Start: -36.9 m * Elevation End: 0.1 m * Location: South Atlantic Ocean * Campaign: ISMFJ18 * Basis: F. J. Saucier * Method/Device: Drifter GPS SPOT Trace (GPS_SPOT)
Comment:
Description
-----------
These drifts were gathered by Jean-Luc Shaw in 2017-18, as part of work for a masters degree in oceanography an Institut des sciences de la mer de Rimouski (ISMER), and as part of the Canadia Healthy Oceans Network (CHONeII) parternship. The drifters were a wooden base about 30 cm in diameter with a Spot GPS beacon attached to one side and a 5 pound weight attached to the other side, such as to maintain the beacon out of the water. 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.
Processing
----------
Data quality was cheked 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 | Circular wooden drifter 30 cm by 2.5 cm, SPOT Trace GPS beacon | |
| 6 | Velocity, north | North vel | m/s | Shaw, Jean-Luc | Circular wooden drifter 30 cm by 2.5 cm, SPOT Trace GPS beacon | |
| 7 | Velocity magnitude | Vel mag | m/s | Shaw, Jean-Luc | Circular wooden drifter 30 cm by 2.5 cm, SPOT Trace GPS beacon | |
| 8 | Velocity direction | Vel dir | deg | Shaw, Jean-Luc | Circular wooden drifter 30 cm by 2.5 cm, SPOT Trace GPS beacon | |
| 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 3 (ProcLevel3)
Size:
42564 data points
Download Data
View dataset as HTML (shows only first 2000 rows)