Dataset: Northern Gulf of Mexico CTD Profiles
Deployment: EN620

Northern Gulf of Mexico CTD Profile Data

View Data: For data, See Dataset Metadata Page: https://www.bco-dmo.org/dataset/873002

Principal Investigator:

Andrew Juhl (Lamont-Doherty Earth Observatory, LDEO)

Co-Principal Investigator:

Solange Duhamel (University of Arizona, UA)

Ajit Subramaniam (Lamont-Doherty Earth Observatory, LDEO)

Andreas Thurnherr (Lamont-Doherty Earth Observatory, LDEO)

Contact:

Ajit Subramaniam (Lamont-Doherty Earth Observatory, LDEO)

BCO-DMO Data Manager:

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

Project:

Development of low Nitrogen:Phosphorus ratios in the euphotic zone - the Phosphorus side of the story (GOMP)

Version:

Deployment Synonyms:

GOMP_2018

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Description

Methods & Sampling

Dataset acquisition description

Hydrographic data were collected during casts with a CTD-rosette system (SBE11plus equipped with a fluorometer, transmissometer, oxygen sensor, and a PAR sensor) on two cruises aboard R/V Endeavor. The EN620 cruise was conducted during August and September 2018. The EN642 cruise was conducted during July and August 2019.

Data Processing Description

Dataset Processing Description

Data were processed using SeaSave v 7.26.7.107.

BCO-DMO Processing:
- concatenated separate data files for EN620 and EN642 into one dataset;
- renamed fields to comply with BCO-DMO naming conventions;
- added date-time field in ISO8601 format;
- changed date format to YYYY-MM-DD;
- removed separate month, day, and year columns and the duplicate time column.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1737240	NSF Division of Ocean Sciences

Instruments

Altimeter

Supplied Name: altimeter

Supplied Description:

Instrument Type

Generic Name: Altimeter

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/379/

Generic Description:

An instrument that measures height above a fixed surface. The data can be used to map ocean-surface topography and generate gridded surface height fields.

CTD Sea-Bird SBE 911plus

Supplied Name: Seabird SBE 11plus v5.2

Supplied Description:

R/V Endeavor is equipped with an SBE 911+ CTD: High quality ducted/pumped system with digiquartz pressure sensor and dual temperature and conductivity sensors. 6800-meter capability and data rate of 24 scans per second.

Instrument Type

Generic Name: CTD Sea-Bird SBE 911plus

Acronym: CTD SBE 911plus

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0058/

Generic Description:

The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics

LI-COR Biospherical PAR Sensor

Supplied Name: PAR/Irradiance, Biospherical/Licor

Supplied Description:

Instrument Type

Generic Name: LI-COR Biospherical PAR Sensor

Acronym: LI-COR Biospherical PAR

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0074/

Generic Description:

The LI-COR Biospherical PAR Sensor is used to measure Photosynthetically Available Radiation (PAR) in the water column. This instrument designation is used when specific make and model are not known.

Niskin bottle

Supplied Description:

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Sea-Bird SBE 43 Dissolved Oxygen Sensor

Supplied Name: SBE43

Supplied Description:

Instrument Type

Generic Name: Sea-Bird SBE 43 Dissolved Oxygen Sensor

Acronym: SBE-43 DO

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0036/

Generic Description:

The Sea-Bird SBE 43 dissolved oxygen sensor is a redesign of the Clark polarographic membrane type of dissolved oxygen sensors. more information from Sea-Bird Electronics

Wet Labs ECO-AFL/FL Fluorometer

Supplied Name: WET Labs ECO-AFL/FL

Supplied Description:

Instrument Type

Generic Name: Wet Labs ECO-AFL/FL Fluorometer

Acronym: ECO AFL/FL

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0172/

Generic Description:

The Environmental Characterization Optics (ECO) series of single channel fluorometers delivers both high resolution and wide ranges across the entire line of parameters using 14 bit digital processing. The ECO series excels in biological monitoring and dye trace studies. The potted optics block results in long term stability of the instrument and the optional anti-biofouling technology delivers truly long term field measurements.
more information from Wet Labs

WET Labs {Sea-Bird WETLabs} C-Star transmissometer

Supplied Name: Transmissometer, WET Labs C-Star

Supplied Description:

Instrument Type

Generic Name: WET Labs {Sea-Bird WETLabs} C-Star transmissometer

Acronym: WL CSTAR Trans

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0160/

Generic Description:

The C-Star transmissometer has a novel monolithic housing with a highly intgrated opto-electronic design to provide a low cost, compact solution for underwater measurements of beam transmittance. The C-Star is capable of free space measurements or flow-through sampling when used with a pump and optical flow tubes. The sensor can be used in profiling, moored, or underway applications. Available with a 6000 m depth rating.

More information on Sea-Bird website: https://www.seabird.com/c-star-transmissometer/product?id=60762467717

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Cruise	Cruise ID number	unitless	cruise_id
StnEvent	Station-event number	unitless	event
Latitude	Latitude	degrees North	lat
Longitude	Longitude	degrees East	lon
ISO_DateTime_UTC	Date and time (UTC) in ISO8601 format: YYYY-MM-DDThh:mm:ssZ	unitless	ISO_DateTime_UTC
Date	Date in format YYYY-MM-DD	unitless	date
Time	Time in format hh:mm:ss	unitless	time
TimeJ	Julian Day	unitless	julian_day
TimeS	Time Elapsed	seconds	time_elapsed
DepSM1	Depth, primary	meters	depth
DepSM2	Depth, secondary	meters	depth
PrDM	Pressure	decibars	press
AltM	Altimeter	meters	altitude
V2	voltage 2, Altimeter	volts	no_bcodmo_term
Sal00	Salinity, primary	PSU	sal
Sal11	Salinity, secondary	PSU	sal
Sigma_e00	Density (sigma theta) Primary	kilograms per cubic meter (kg/m^3)	sigma_0
Sigma_e11	Density (sigma theta) secondary	kilograms per cubic meter (kg/m^3)	sigma_0
Potemp090C	Potential temperature, primary	degrees Celsius	potemp
Potemp190C	Potential temperature, secondary	degrees Celsius	potemp
SvCM	sound velocity primary	meters per second (m/s)	sound_vel
SvCM1	sound velocity secondary	meters per second (m/s)	sound_vel
T090C	Water temperature, primary	degrees Celsius	temp
T190C	Water temperature, secondary	degrees Celsius	temp
T2_T190C	Difference between primary and secondary temperature measurements	degrees Celsius	temp
C0	Conductivity, primary	Siemens per meter (S/m)	cond
C1	Conductivity, secondary	Siemens per meter (S/m)	cond
C2_C1	Difference between primary and secondary conductivity measurements	Siemens per meter (S/m)	cond
V0	Voltage 0, Transmissometer, WET Labs C-Star	volts	no_bcodmo_term
CStarAt0	Beam Attenuation	reciprocal meters (1/m)	beam_cp
CStarTr0	Percent beam transmission	unitless (percent)	trans
V1	voltage 1, Fluorometer, WET Labs ECO-AFL/FL	volts	no_bcodmo_term
FlECO_AFL	Chlorophyll Fluoresence	milligrams per cubic meter (mg/m^3)	fluor
V3	Voltage 3, PAR/Irradiance, Biospherical/Licor	volts	no_bcodmo_term
Par	In situ PAR	photons/m^2/s	PAR
V4	voltage 4, Oxygen, SBE 43	volts	no_bcodmo_term
Sbeox0V	Oxygen Raw primary	volts	O2_v
V5	voltage 5, Oxygen, SBE 43, 2	volts	O2_v
Sbeox1V	Oxygen Raw secondary	volts	O2_v
V6	voltage 6, User Polynomial	volts	no_bcodmo_term
V7	voltage 7, Free	volts	no_bcodmo_term
Sbeox0_mmL	Oxygen concentration Primary	micromoles per liter (umol/l)	O2
Sbeox1_mmL	Oxygen concentration secondary	micromoles per liter (umol/l)	O2
Spar	Surface PAR	photons/m^2/s	SPAR
Dz_dtM	?	?	no_bcodmo_term
Gpa	?	?	no_bcodmo_term
Pumps	?	?	no_bcodmo_term
sn	?	?	no_bcodmo_term
Nbin	?	?	no_bcodmo_term

Database

Contribute Data

Dataset: Northern Gulf of Mexico CTD Profiles
Deployment: EN620

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Northern Gulf of Mexico CTD ProfilesDeployment: EN620

Dataset acquisition description

Dataset Processing Description

Dataset: Northern Gulf of Mexico CTD Profiles
Deployment: EN620