Dataset: SEEPC CTD

Name: CTD data from moorings collected on multiple cruises from the Gulf of Mexico and N. Atlantic, 2011-2014 (SEEPC project)
Published: 2016-12-28
Keywords: oceans

View Data: to access data, check the deployments below

Cite This Dataset

Project:

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

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)

Theresa McKee (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version Date:

2016-12-28

Restricted:

Validated:

Yes

Current State:

Final no updates expected

CTD data from moorings collected on multiple cruises from the Gulf of Mexico and N. Atlantic, 2011-2014 (SEEPC project)

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Methods & Sampling

Measurements taken to within 50 meters of ocean bottom of Salinity (Conductivity), Temperature, Depth, Fluorescence, and Oxygen Saturation. Various SeaBird-branded shipboard CTD instruments were calibrated, deployed, cleaned, and re-calibrated after arrival on station, depending on logistics. Data sampling interval was evenly spaced temporally, the spatial sampling interval varied depending on the winch speed, generally 1 m/s for the majority of the sampling the water column.

Data Processing Description

If necessary, acquisition files were converted from hex to ascii, then split into upcast and downcasts. Downcasts were bin-averaged to 1 meter or 1 decibar. Extraneous parameters were retained, but are not displayed.

BCO-DMO Processing Notes:

Most profiles were resubmitted as converted from .hex to .cnv., bin-averaged, and the down-casts and up-casts split.
BCO-DMO further processed the data as follows.

AT2102:
The .hex files were reprocessed using Seabird Routines in Virtual Box Windows XP to output the variables in consistent order between stations.
Salinity from the primary sensor was included in station 1.
Files were bin-averaged on depth to be consistent with the original unaveraged file which did not include pressure.
Pressure was output as a variable
Casts were split into upcast and downcast.
Spans were compared with original full profiles to be sure data were identical.
Parameter names were made consistent with BCO-DMO standards.
Flag was not displayed since it is all zeroes.

The following parameters were not displayed for each deployment:
AT2615 -- secondary sensor data, altimeter, and flag
AT2904 -- accelerometer, altimer, flag, lat and lon that were recorded at every sample (after checking with D. McVeigh)
CH0912 -- flag
OC471-02 -- flag
PE14-11 -- nbf, lat, lon, and flag nbf = number of bottles fired
WS15271 -- accelerometer altimeter Oxygen_volt, and flag

Variable order was not consistent between deployments. Therefore, the data is located under each deployment rather than from this landing page:
AT21-02: pres, depth, temp, sal, oxygen, fluor
AT2615: pres, temp, temp2, cond, trans, fluor, O2sat, alt, time_elapsed, depth, density, sal, sound_vel
CH0912: depth, sal, temp, O2sat, CDOM
OC471-02: depth, temp, sal, fluor, oxygen
PE14-11: depth, sal, temp, oxygen, fluor
AT2904: cond_mS, density, depth, fluor, lathide, lonhide, N2O, O2, sal, temp
WS15271: depth, sal, temp, altimeter, cond_mS, density, oxygen, N2O, fluor

Dates on osprey and in top level.dat files updated to reflect versions that are currently served.

More Information about this dataset

Funding Sources

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

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
AT21-02	SEEPC-Barbados	2012-06-01	R/V Atlantis	Cindy Van Dover (Chief Scientist)	data info
AT26-15	SEEPC GoMex	2014-05-21	R/V Atlantis	Cindy Van Dover (Chief Scientist)	data info
AT29-04	Seep Connectivity WAM Western Atlantic Margin	2015-07-08	R/V Atlantis	Cindy Van Dover (Chief Scientist)	data info
CH0912	SEEPC	2012-11-01	R/V Cape Hatteras	David B. Eggleston (Chief Scientist) Cindy Van Dover (Contact)	data info
OC471-02	SEEPC	2011-05-17	R/V Oceanus	Cindy Van Dover (Chief Scientist) David B. Eggleston (Contact)	data info
PE14-11	SEEPC	2013-11-04	R/V Pelican	Craig M. Young (Chief Scientist) Cindy Van Dover (Contact)	data info
WS15271		2015-09-28	R/V F.G. Walton Smith	Craig M. Young (Chief Scientist)	data info

Instruments

CTD Sea-Bird

Supplied Name: CTD

Supplied Description:

Sea-Bird Model varied by vessel.

Instrument Type

Generic Name: CTD Sea-Bird

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/130/

Generic Description:

Conductivity, Temperature, Depth (CTD) sensor package from SeaBird Electronics, no specific unit identified. This instrument designation is used when specific make and model are not known. See also other SeaBird instruments listed under CTD. More information from Sea-Bird Electronics.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	cruise identifier	dimensionless	cruise_id
sta	station identifier	dimensionless	sta
cast	number of cast	dimensionless	cast
ISO_DateTime_UTC	UTC date and time ISO formatted	YYYY-MM-DDTHH:MM:SS[.xx]Z	ISO_DateTime_UTC
year	year reported as yyyy	YYYY	year
month	month reported as mm	MM	no_bcodmo_term
day	day reported as dd	DD	day
yrday_utc	UTC day and decimal time	dimensionless	yrday_utc
time	start time of cast reported as hhmm	HHMM	time
lon	longitude (east is positive)	decimal degrees	lon
lat	latitude (north is positive)	decimal degrees	lat
depth	sampling depth	meters	depth
temp	Temperature	degrees Celsius	temp
sal	Salinity	PSU	sal
O2sat	oxygen concentration	milliliters/liters	O2sat
fluor	fluorescence	milligrams/meter^3	fluor
press	sampling pressure	decibars	press
N2O	Nitrous Oxide	milliliters per liter	N2O
cond	Water conductivity	Siemens per meter or milliSiemens per centimeter	cond
density	Water density	kilograms per meter^3	density
sound_vel	Water sound velocity	meters per second	sound_vel
trans	Beam transmission from WET Labs C-Star	percent	trans

Database

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Dataset: SEEPC CTD