Dataset: SEEPC XBT
Deployment: AT29-04

XBT data from SEEPC cruises

Principal Investigator:

Cindy Van Dover (Duke University)

Co-Principal Investigator:

David B. Eggleston (North Carolina State University - Marine, Earth and Atmospheric Sciences, NCSU MEAS)

Student:

Ms Doreen McVeigh (North Carolina State University - Marine, Earth and Atmospheric Sciences, NCSU MEAS)

BCO-DMO Data Manager:

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

Project:

Connectivity in western Atlantic seep populations: Oceanographic and life-history processes underlying genetic structure (SEEPC)

Current State:

Preliminary and in progress

Version:

2015-12-01

Deployment Synonyms:

Seep Connectivity, WAM, Western Atlantic Margin

Coordinated Deployments:

AT29-04_Alvin_Dives

Version Date:

2015-12-01

Data URL:

https://www.bco-dmo.org/dataset-deployment/627995/data

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Description

SEEPC XBT data (depth, temperature, sound velocity).

Methods & Sampling

Dataset acquisition description

XBTs were deployed over a spatial spacing, dependent on the number of ACMs per transect available. 10nm spacing was desired where possible while underway.

Probe information:

OC471-02:
Probe Type : T-7
Terminal Depth : 760 m
Depth Equation : Standard
Depth Coeff. 1 : 0.0
Depth Coeff. 2 : 6.472
Depth Coeff. 3 : -0.00216
Depth Coeff. 4 : 0.0
Pressure Pt Correction: 100.0%
all casts: Sound velocity derived with assumed salinity: 34.50 ppt

AT21-02:
Probe Type : T-6
Terminal Depth : 460 m
Depth Equation : Standard
Depth Coeff. 1 : 0.0
Depth Coeff. 2 : 6.472
Depth Coeff. 3 : -0.00216
Depth Coeff. 4 : 0.0
Pressure Pt Correction: 100.0%
Sound velocity derived with assumed salinity:
T6_00002.EDF: 35.10 ppt
T6_00003.EDF: 35.09 ppt
T6_00004.EDF: 35.09 ppt
T6_00005.EDF: 34.45 ppt
T6_00006.EDF: 34.43 ppt
T6_00007.EDF: 33.98 ppt
T6_00008.EDF: 34.17 ppt
T6_00009.EDF: 34.30 ppt
T6_00010.EDF: 34.58 ppt
T6_00011.EDF: 34.54 ppt
T6_00012.EDF: 33.47 ppt
T6_00013.EDF: 33.30 ppt
T6_00014.EDF: 33.30 ppt
T6_00015.EDF: 33.10 ppt
T6_00016.EDF: 33.10 ppt
T6_00017.EDF: 32.80 ppt

CH0912:
Probe Type : T-6
Terminal Depth : 460 m
Depth Equation : Standard
Depth Coeff. 1 : 0.0
Depth Coeff. 2 : 6.691
Depth Coeff. 3 : -0.00225
Depth Coeff. 4 : 0.0
Pressure Pt Correction: 100.0%
all casts: Salinity : 30.00 ppt

AT26-15:
Probe Type : T-7
Terminal Depth : 760 m
Depth Equation : Standard
Depth Coeff. 1 : 0.0
Depth Coeff. 2 : 6.472
Depth Coeff. 3 : -0.00216
Depth Coeff. 4 : 0.0
Pressure Pt Correction: 100.0%
all casts: Sound velocity derived with assumed salinity: 35.00 ppt

Data Processing Description

Dataset Processing Description

The data has been minimally processed. Low-level data processing was completed, mainly to convert binary data to CSV. The originally submitted *.EDF files are text files, produced when the data were collected and have not had any further processing.

BCO-DMO Processing:

- added conventional header with dataset name, PI name, version date
- used script EDF2xbt.pl to remove original headers and add parameter names
- parameter names modified to conform to BCO-DMO convention
- date reformatted to YYYYMMDD
- added cruise_id and year columns

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1029841	NSF Division of Ocean Sciences

Instruments

Expendable Bathythermograph

Supplied Name: XBT

Supplied Description:

Lockheed Martin Sippican T6 model XBT

Instrument Type

Generic Name: Expendable Bathythermograph

Acronym: XBT

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/132/

Generic Description:

An XBT is an expendable free-fall temperature probe that provides a profile of measured temperature against depth calculated from a fall-rate model. For example, two popular XBT models are the T-5 and T-7 probes from Sippican. More information is available from Lockheed Martin Sippican at URL: http://www.sippican.com/.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	cruise identification	unitless	cruise_id
year	year	YYYY	year
date	date	YYYYMMDD	date
time	time	HHMM	time
ISO_DateTime_UTC	Date/Time (UTC) ISO formatted based on ISO 8601:2004(E)	YYYY-mm-ddTHH:MM:SS[.xx]Z (UTC time)	ISO_DateTime_UTC
yrday_utc	UTC day and decimal time; as 326.5 for the 326th day of the year or November 22 at 1200 hours (noon)	unitless	yrday_utc
lat	latitude; negative denotes South	decimal degrees	lat
lon	longitude; negative denotes West	decimal degrees	lon
Xseq	XBT Sequence Number	integer	cast
depth_xbt	XBT depth	meters	depth
temp_xbt	XBT temperature	degrees celsius	temp
snd_vel	sound velocity	meters/second	sound_vel

Database

Contribute Data

Dataset: SEEPC XBT
Deployment: AT29-04

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: SEEPC XBTDeployment: AT29-04

Dataset acquisition description

Dataset Processing Description

Dataset: SEEPC XBT
Deployment: AT29-04