Dataset: drifter_start_positions
Deployment: AL9901

Initial drifter deployment positions

Principal Investigator:

Richard Limeburner (Woods Hole Oceanographic Institution, WHOI)

Project:

U.S. GLOBEC Georges Bank (GB)

Current State:

Final no updates expected

Version:

23 May 2012

Version Date:

2012-05-23

Data URL:

https://www.bco-dmo.org/dataset-deployment/455229/data

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Description

Initial positions of drifters deployed from 1995 to 1999 in support of the U.S. GLOBEC Georges Bank program. For drifter tracking, see the 'drifter_tracks' dataset.

Notes:
¹Drifters named with a leading 'g' were generally deployed in US terriorial waters and drifters identified with a leading 'n' were deployed in Canadian Waters by Peter Smith from the Bedford Institute of Oceanography (BIO). Also, drifter types containing a gps system reported positions every 30 minutes.

²'inst' parameter is a combination of: Manufacturer code (se = Seimac, cw = Clearwater, met = MEtocean, to = Technocean) + Center depth of drogue (10 or 40 meters) + Shape of drogue (W = wide, versus a square drogue) + Presence of gps system (gps)

Contributor:
Richard Limeburner (Woods Hole Oceanographic Institution)
Woods Hole, MA 02540
rlimeburner@whoi.edu

BCO-DMO updated: June 01, 2012

Methods & Sampling

Dataset acquisition description

Satellite-tracked drifters with holey sock drogues centered at 10, 15 and 40-m depths were deployed over Georges Bank during 1995-99 in support of the U.S. GLOBEC/Georges Bank Program. Some drifters were deployed in regions of strong vertical shear over the Bank and these drifters had a drogue that was twice as wide and half as long as the standard drogue and are designated as having ‘wide’ drogues (see note 2 above). Drifter types containing a gps system reported positions every 30 minutes.

Data Processing Description

Dataset Processing Description

BCO-DMO corrected unknown/missing cruise ID's for the following drifters:
g31- corrected to EN274. (Cruise report for EN274 documents the deployment of g31.)
g47- corrected to EN278. (Original data has EN278 listed.)
g84 and g85 - corrected to EN291. (EN291 cruise report documents the deployment of these drifters.)
g98 and g99 - corrected to EN294. (EN294 cruise report documents the deployment of these drifters.)
g140 and g142 - corrected to EN300. (EN300 cruise report documents the deployment of these drifters.)
g157 and g158 - corrected to OC315. (Original data has OC315 listed and Oceanus schedule confirms dates, locations, and investigators.)
g159 - corrected to OC316. (Original data has OC316 listed and cruise report confirms this.)
n6 to n10 - corrected to PAR98-078. (Cruise report for PAR-98-078 documents the deployment of these drifters.)

More information about this dataset deployment

Funding

Award Number	Funding Source
unknown GB NOAA	National Oceanic and Atmospheric Administration
unknown GB NSF	National Science Foundation

Instruments

Drifter Buoy

Supplied Description:

Satellite-tracked drifters with holey sock drogues centered at 10, 15 and 40-m depths were deployed over Georges Bank during 1995-99. The GLOBEC Georges Bank drifters were made by Clearwater (CW), Seimac (SE), Technocean (TE), and MEtocean (ME).

Instrument Type

Generic Name: Drifter Buoy

Generic Description:

Drifting buoys are free drifting platforms with a float or buoy that keep the drifter at the surface and underwater sails or socks that catch the current. These instruments sit at the surface of the ocean and are transported via near-surface ocean currents. They are not fixed to the ocean bottom, therefore they "drift" with the currents. For this reason, these instruments are referred to as drifters, or drifting buoys.

The surface float contains sensors that measure different parameters, such as sea surface temperature, barometric pressure, salinity, wave height, etc. Data collected from these sensors are transmitted to satellites passing overhead, which are then relayed to land-based data centers.

definition sources: https://mmisw.org/ont/ioos/platform/drifting_buoy and https://www.aoml.noaa.gov/phod/gdp/faq.php#drifter1

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
drifterid	GLOBEC drifter identification number ¹.	dimensionless	drifterid
argosid	ARGOS drifter identification number.	dimensionless	argosid
cruiseid	Identifier of the cruise on which the drifter was deployed.	dimensionless	cruiseid
month_gmt	Month of year, GMT, of initial deployment.	month (1-12), MM	month_gmt
day_gmt	Day of month of initial deployment, GMT.	day (1-31), dd	day_gmt
year	Year the drifter was initially deployed (GMT). Format: yyyy	unitless	year
time_gmt	Time of deployment, GMT.	HHmm	time_gmt
lat	Latitude, negative = south.	decimal degrees	lat
lon	Longitude, negative = west.	decimal degrees	lon
status	Drifter deployment status (e.g. new).	dimensionless	status
inst	Drifter deployment type² (i.e. drogued at 10 or 40 meters)	dimensionless	instrument
comments	Comments pertaining to a specific drifter deployment.	dimensionless	comment

Database

Contribute Data

Dataset: drifter_start_positions
Deployment: AL9901

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: drifter_start_positionsDeployment: AL9901

Dataset acquisition description

Dataset Processing Description

Dataset: drifter_start_positions
Deployment: AL9901