Dataset: EN616 CTD hydrography

Name: Hydrography and environmental conditions measured with CTD at nine stations during R/V Endeavor cruise EN616 in July 2018
Published: 2023-02-24
Keywords: CTD, beam attenuation, chlorophyll fluorescence, dissolved oxygen, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.887800.1

Spatial Extent: N:43.71835 E:-66.51748 S:36.98572 W:-72.92708

Temporal Extent: 2018-07-05 - 2018-07-13

Project:

Coccolithophore Mixotrophy (Cocco-Mix)

Principal Investigator:

William M. Balch (Bigelow Laboratory for Ocean Sciences)

Co-Principal Investigator:

Stephen D. Archer (Bigelow Laboratory for Ocean Sciences)

David T. Drapeau (Bigelow Laboratory for Ocean Sciences)

Jelena Godrijan (Bigelow Laboratory for Ocean Sciences)

BCO-DMO Data Manager:

Dana Stuart Gerlach (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2023-02-24

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Hydrography and environmental conditions measured with CTD at nine stations during R/V Endeavor cruise EN616 in July 2018

Abstract:

Hydrography and environmental conditions were measured with CTD at nine stations during R/V Endeavor cruise EN616 in July 2018. The stations ranged from the New England Continental Shelf, New England Continental Slope, to the Sargasso Sea ocean regions.

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2023-02-24	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.887800.1	2023-03-08

Methods & Sampling

Discrete water sampling, depth profiles and CTD/Rosette Casts
Hydrography and environmental conditions were measured with CTD at nine stations during R/V Endeavor cruise EN616 in July 2018. Casts at each station included a CTD/rosette profile of temperature, salinity, dissolved oxygen and beam attenuation.

At eight depths, three 10L Niskin samples were taken for discrete measurements of:

1. Chlorophyll, nutrients including nitrate, nitrite, ammonium, phosphate, and silicate
2. Particulate organic carbon (POC) plus particulate organic nitrogen (PON)
3. Particulate inorganic carbon (PIC)
4. Biogenic silica
5. Birefringence counts of coccolithophores (done ashore)
6. Shipboard Yokogawa Fluid Imaging Technologies FlowCam imaging cytometer, in order to enumerate the major microalgal classes and estimate the particle size distribution function

Measurements 1 to 4 are part of BCO-DMO dataset 837074 (See https://www.bco-dmo.org/dataset/837074, and the Related Datasets section below).
Measurement 5 of birefringence counts data is BCO-DMO dataset 887863 (See https://www.bco-dmo.org/dataset/887863, and the Related Datasets section below).
Measurement 6 is BCO-DMO dataset 887787. (See https://www.bco-dmo.org/dataset/887787, and the Related Datasets section below)

Data Processing Description

SeaBird Data Processing was performed using Seasave Ver, 7.26.7.107; SBE Data Processing, Ver 7.26.7.

BCO-DMO processing
- Data is from columns AU through BK on the original source file titled "EN616_master_datasheet_bottle_and_discrete_organics_updated_ccc_BCODMO.csv"
- CTD data extracted from combined "master datasheet" into a separate file called "CTD_EN616.csv"
- Modified parameter (column) names to conform with BCO-DMO naming conventions.
- Converted date format to ISO Date 8601 format
- Removed columns for Primary and Seconday Density since no measurements or values

Data Files

File
ctd_en616.csv (Comma Separated Values (.csv), 11.75 KB) MD5:b9d30b2aecfbdd1c271592c176594d88 CTD hydrography and environmental conditions from cruise EN616

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1635748

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
EN616	Cocco-Mix	2018-07-03	R/V Endeavor	William M. Balch (Chief Scientist)	data info

Instruments

CTD Sea-Bird SBE 911plus

Supplied Name: SeaBird Electronics SBE 911plus CTD

Supplied Description:

SeaBird Electronics; SBE 911plusCTD

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: Biospherical/Licor

Supplied Description:

Photosynthetically Available Radiation (PAR) was measured using Biospherical/Licor ) for depth where Niskin bottle was tripped

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.

Wet Labs ECO-AFL/FL Fluorometer

Supplied Name: WET Labs ECO-AFL/FL fluorometer

Supplied Description:

Chlorophyll fluorescence was measured (in Volts [relative scale]) using WET Labs ECO-AFL/FL fluorometer for depth where Niskin bottle was tripped.

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: WET Labs C-Star

Supplied Description:

Beam attenuation and beam transmittance were measured using WET Labs C-Star. The instrument had a 25 cm pathlength and measured beam attenuation at a wavelength of 660 nm.

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

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Cruise	Cruise identification	unitless	cruise_id
Station	Station number for EN616 cruise for water sample collection	unitless	station
Type	Type of sample; B = discrete bottle sample	unitless	sample_type
Longitude	Longitude of water sample collection	decimal degrees	lon
Latitude	Latitude of water sample collection	decimal degrees	lat
Depth	Depth of water sample	meters	depth
ISO_DateTime_UTC	Date and time of sample collection Format: %Y-%m-%dT%H:%M:%SZ	unitless	ISO_DateTime_UTC
Gear	Gear used to collect the water and coccolithophore samples	unitless	sampling_method
Balch_Sample_num	Consecutive unique numbers assigned to each water sample for all analyses done for a given station	unitless	sample
Conductivity_Primary	CTD Primary Conductivity for depth where Niskin bottle tripped	milliSiemens per centimeter (mS/cm)	cond
Conductivity_Secondary	CTD Secondary Conductivity for depth where Niskin bottle tripped	milliSiemens per centimeter (mS/cm)	cond
Temperature_Primary	CTD Primary Temperature for depth where Niskin bottle tripped	degrees Celsius	temp
Temperature_Secondary	CTD Secondary Temperature for depth where Niskin bottle tripped	degrees Celsius	temp
Salinity_Primary	CTD Primary Salinity for depth where Niskin bottle tripped	psu	sal_ctd
Salinity_Secondary	CTD Secondary Salinity for depth where Niskin bottle tripped	psu	sal_ctd
Oxygen	CTD dissolved Oxygen for depth where Niskin bottle tripped	milliliters per liter (mL/L)	O2
Pressure	CTD Pressure measured with Digiquartz for depth where Niskin bottle tripped measured	decibars (dB)	press
Beam_C_Attenuation	CTD Beam C Attenuation at 660 nm measured with WET Labs C-star for depth where Niskin bottle tripped	per meter	beam_cp
Fluorescence	CTD Chlorophyll Fluorescence measured with WET Labs ECO-AFL/FL fluorometer for depth where Niskin bottle tripped	volts	fluor
PAR	CTD Photosynthetically Available Radiation (PAR) measured with Biospherical/Licor for depth where Niskin bottle tripped	micromole photons per square meter per second (umol photons/m^2/sec)	PAR
Sigma_Primary	CTD Primary Sigma is the primary density anomaly (sigma theta) for depth where Niskin bottle tripped	units	sigma_0
Sigma_Secondary	CTD Secondary Sigma is the secondary density anomaly (sigma theta) for depth where Niskin bottle tripped	units	sigma_0
Transmittance	CTD Transmittance at 660 nm wavelength for depth where Niskin bottle tripped	percent	trans
SPAR	CTD Surface Photosynthetically Available Radiation (SPAR; 400-700 nm) measured at surface when Niskin bottle tripped	micromole photons per square meter per second (umol photons/m^2/sec)	SPAR

Status message

Database

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Dataset: EN616 CTD hydrography