Dataset: drifters_argos
Deployment: NBP0202

Raw drifter data

Principal Investigator:

Richard Limeburner (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Ms Dicky Allison (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

U.S. GLOBEC Southern Ocean (SOGLOBEC)

Deployment Synonyms:

GLOBECIII

Coordinated Deployments:

LMG0203

Data URL:

https://www.bco-dmo.org/dataset-deployment/450449/data

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Description

ARGOS Tracked Near Surface Drifter Data
The following was extracted from the Cruise Report of the N.B. Palmer Cruise 01-03. The complete cruise report can be seen here or on the SO GLOBEC web site under the object "Inventory"

2.0 Drifter Measurements (Bob Beardsley and Dick Limeburner)
Surface drifters are being deployed and tracked via satellite to study the near surface Lagrangian currents in the SO GLOBEC study area on the western Antarctic Peninsula Shelf. Each drifter has a small (~ 30 cm diameter) surface float with ARGOS transmitter and batteries tethered to a holey sock drogue centered at 15 m below the surface. The drogue, about 10 m tall and 1 m in diameter, is designed to "lock" itself to the water so that the surface float follows the mean water motion at 15 m depth with very little slippage even in high winds. Thus measuring the drifter's position as a function of time provides a Lagrangian measurement of the 15-m ocean current.

Data contributed by:
Richard Limeburner
Woods Hole Oceanographic Institution
Woods Hole, MA 02543
e-mail: rlimeburner@whoi.edu

file updated June 18 2012; smr.

Methods & Sampling

Dataset acquisition description

Deployment-specific acquisition description

2.0 Drifter Measurements (Bob Beardsley and Dick Limeburner)

Surface drifters are being deployed and tracked via satellite to study the near surface Lagrangian currents in the SO GLOBEC study area on the western Antarctic Peninsula Shelf. Each drifter has a small (~ 30 cm diameter) surface float with ARGOS transmitter and batteries tethered to a holey sock drogue centered at 15 m below the surface. The drogue, about 10 m tall and 1 m in diameter, is designed to "lock" itself to the water so that the surface float follows the mean water motion at 15 m depth with very little slippage even in high winds. Thus measuring the drifter's position as a function of time provides a Lagrangian measurement of the 15-m ocean current.

Data Processing Description

Dataset Processing Description

BCO-DMO made the following changes to the formatting of the data: Calculated actual 'yrday_gmt' values from the original 'yrday_special' column; Added cruiseid; Re-formatted all values from scientific notation to integers; Added month_gmt, day_gmt, and time_gmt.

More information about this dataset deployment

Funding

Award Number	Funding Source
unknown GB NSF	National Science Foundation
unknown SOGLOBEC NSF ANT	NSF Antarctic Sciences

Instruments

Beardsley Drifter

Supplied Name: Drifter Buoy

Supplied Description:

Each drifter has a small (~ 30 cm diameter) surface float with ARGOS transmitter and batteries tethered to a holey sock drogue centered at 15 m below the surface.

Instrument Type

Generic Name: Beardsley Drifter

Generic Description:

Beardsley Drifters are near-surface satellite-tracked drifters used for observations of circulation patterns. They are WOCE-style drifters featuring holey sock drogues. Each drifter has a small (~ 30 cm diameter) surface float with ARGOS transmitter and batteries tethered to a holey sock drogue centered at 15 m below the surface. The drogue, about 10 m tall and 1 m in diameter, is designed to "lock" itself to the water so that the surface float follows the mean water motion at 15 m depth with very little slippage even in high winds. Thus measuring the drifter's position as a function of time provides a Lagrangian measurement of the 15-m ocean current.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
year	Four-digit year.	dimensionless	year
drifterid	PI assigned drifter identification number.	dimensionless	drifterid
argosid	ARGOS assigned drifter identification.	dimensionless	argosid
date_start_gmt	Date the drifter was initially deployed; reported as month/day/year, i.e. 3/26/01, GMT.	dimensionless	date_begin
time_gmt	Time of day as hours and minutes (HHMM format), GMT.	dimensionless	time_gmt
lat_start	Latitude where drifter was deployed, negative = South.	decimal degrees	lat_start
lon_start	Longitude where drifter was deployed, negative = West.	decimal degrees	lon_start
comments	If drifter was deployed at a mooring site, mooring name is reported.	N/A	comment
yrday_gmt	Decimal year day (January 1, at 1200 hr. = year day 1.5).	Decimal year day	yrday_gmt
lon	Longitude, negative = West.	decimal degrees	lon
lat	Latitude, negative = South.	decimal degrees	lat
temp_ss	Sea surface temperature; depth of sensor unknown or variable; temp data uncorrected, has errors.	degrees C	SST
depth_drifter	Drifter submergence in meters - uncorrected, has errors.	meters	depth_drifter
year_start	Year when the drifter was initially deployed.	dimensionless	year_start
cruise_id	Identifier for the cruise on which the drifter was initially deployed.	dimensionless	cruiseid
time_start_gmt	Time at which the drifter was initially deployed as hours and minutes (HHMM), GMT.	dimensionless	time_start
month_gmt	Month of year (01 to 12); calculated from yrday_gmt.	dimensionless	month_gmt
day_gmt	Day of month (01 to 31); calculated from yrday_gmt.	dimensionless	day

Database

Contribute Data

Dataset: drifters_argos
Deployment: NBP0202

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: drifters_argosDeployment: NBP0202

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: drifters_argos
Deployment: NBP0202