Dataset: buoy_therm

Name: Thermistor data at 10 cm intervals in air, ice, water from autonomous buoys from ARSV Laurence M. Gould LMG0106 in the Southern Ocean, August to November, 2001 (SOGLOBEC project)
Published: 2009-05-07
Keywords: oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.3115.1

Spatial Extent: N:-67 E:-68 S:-69.5 W:-75

Temporal Extent: 2001-08-06 - 2001-11-10

Project:

U.S. GLOBEC Southern Ocean (SOGLOBEC)

Program:

U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)

Principal Investigator:

Daniel P. Costa (University of California-Santa Cruz, UCSC)

Co-Principal Investigator:

Chris H. Fritsen (Desert Research Institute, DRI)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2009-05-07

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Thermistor data at 10 cm intervals in air, ice, water from autonomous buoys from ARSV Laurence M. Gould LMG0106 in the Southern Ocean, August to November, 2001 (SOGLOBEC project)

Abstract:

Thermistor data at 10 cm intervals in air, ice, water from autonomous buoys from ARSV Laurence M. Gould LMG0106 in the Southern Ocean, August to November, 2001 for the Southern Ocean GLOBEC project.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2009-05-07	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.3115.1	2020-01-22

Description

Related datasets:
buoy_position Autonomous buoy position data, Aug. - Nov. 2001
buoy_temp_barom Air temperature and barometric pressure results from autonomous buoys, Aug. - Nov. 2001
buoy_radm Radiometer data from autonomous buoy 07949, Aug. - Nov. 2001

Methods & Sampling

During the July-September 2001 Southern Globec cruises of the Palmer and Gould we installed four buoys. Two of the buoys (07413, 07440) were standard off-the-shelf Met-Ocean Ice buoys (see above photograph). These buoys measured barometric pressure, air temperature, and GPS position. The data were transmitted via ARGOS. A radar reflector was mounted on a wooden 4 x 4 to help find the site if there was an opportunity to return, however the reflector return was difficult to discern among all the backscatter clutter caused by deformed ice and icebergs.

The other two buoys (07949, 07950) were custom made CRREL ice mass balance buoys (photo on right). These buoys reported barometric pressure, Argos position, and air temperature. In addition they had a thermistor string that measured a vertical profile of temperature, at 10 cm spacing, from the air, through the snow and ice, and into the upper ocean. There were acoustic sensors measuring the positions of the snow surface and ice bottom. A fluorometer was mounted under the ice. One of the buoys (07949) had three spectroradiometers; one mounted about the ice, one mounted directly below the ice, and one a few meters deep in the upper ocean. Results from all buoys are compared.

Positive values are above the ice; negative values are in the ice and underlying ocean. Due to surface flooding and freezing, the position of the snow-ice interface changed during the measurement period.

Tracks from all 2001 buoys:

buoy tracks

Data Files

File
buoy_therm.csv (Comma Separated Values (.csv), 547.20 KB) MD5:29efaa7d4840933c03a577b63ad67f25 Primary data file for dataset ID 3115

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Antarctic Sciences	unknown SOGLOBEC NSF ANT

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
LMG0106		2001-07-21	ARSV Laurence M. Gould	Daniel P. Costa (Chief Scientist)	data info

Instruments

Drifter Buoy

Supplied Description:

4 buoys in ice

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

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
therm_pos	height of thermistor relative to ice. Positive values are above the ice; negative values are in the ice and underlying ocean.	centimeters	no_bcodmo_term
yrday_gmt	GMT day and decimal time, as 326.5 for the 326th day of the year, or November 22 at 1200 hours (noon)		yrday_gmt
date_gmt	gmt month, day and year, usually as a text string, e.g. feb10_1995.		date_gmt
year	year, reported as YYYY, e.g. 1995		year
month_gmt	month of year, GMT time , i.e. 01-12		month_gmt
day_gmt	day, GMT time e.g. 22.		day_gmt
time_gmt	time of day, reported in GMT time, 24 hour clock		time_gmt
temp	temperature at measurement depth	degrees Celsius	temp

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