Dataset: CTD Hydrography
Deployment: SAV-17-02

Basic CTD data collected during SAV cruises 2015-2017

Principal Investigator:

Peter Lee (College of Charleston - Hollings Marine Lab, CoC-HML)

BCO-DMO Data Manager:

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

Project:

RUI: Vitamin B12 and nitrogen regulation of oceanic dimethylsulfoniopropionate and dimethylsulfide (B12 Impacts on DMSP)

Data URL:

https://www.bco-dmo.org/dataset-deployment/815985/data

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Description

Basic CTD data collected using a Sea-Bird Scientific SBE 911 during several R/V Savannah cruises conducted from 2015 to 2017 along a transect from shelf waters to oligotrophic waters in the South Atlantic Bight off the coast of Georgia (Navy Op Area NA06).

Methods & Sampling

Dataset acquisition description

Data were collected using a Sea-Bird Scientific SBE 911 CTD carousel with SBE-25 CTD and Satlantic ISUS.

Data Processing Description

Dataset Processing Description

Basic data processing was done using SBE Data Processing v7.23.2 (1m bins with downcast data reported).

BCO-DMO Processing:
- concatenated all CTD data files into one dataset;
- renamed fields;
- added date/time field in ISO8601 format.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1436458	NSF Division of Ocean Sciences

Instruments

CTD Sea-Bird 911

Supplied Name: Sea-Bird Scientific SBE 911 CTD carousel

Supplied Description:

Instrument Type

Generic Name: CTD Sea-Bird 911

Acronym: CTD SBE 911

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0035/

Generic Description:

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

ISUS Nitrate sensor

Supplied Name: Satlantic ISUS

Supplied Description:

Instrument Type

Generic Name: ISUS Nitrate sensor

Acronym: ISUS Nitrate

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0135/

Generic Description:

The Satlantic ISUS nitrate sensor is an in-situ UV absorption sensor which calculates nitrate concentration from the seawater spectrum. The ISUS V2 has a 1cm path length, a 200-400 nm wavelength range., and is depth rated to 1000 m. Satlantic's ISUS V3 nitrate sensor uses advanced UV absorption technology to measure nitrate concentration in real-time.

Sea-Bird SBE 25 Sealogger CTD

Supplied Name: SBE-25 CTD

Supplied Description:

Instrument Type

Generic Name: Sea-Bird SBE 25 Sealogger CTD

Acronym: CTD SBE 25

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0040/

Generic Description:

The Sea-Bird SBE 25 SEALOGGER CTD is battery powered and is typically used to record data in memory, eliminating the need for a large vessel, electrical sea cable, and on-board computer. All SBE 25s can also operate in real-time, transmitting data via an opto-isolated RS-232 serial port. Temperature and conductivity are measured by the SBE 3F Temperature sensor and SBE 4 Conductivity sensor (same as those used on the premium SBE 9plus CTD). The SBE 25 also includes the SBE 5P (plastic) or 5T (titanium) Submersible Pump and TC Duct. The pump-controlled, TC-ducted flow configuration significantly reduces salinity spiking caused by ship heave, and in calm waters allows slower descent rates for improved resolution of water column features. Pressure is measured by the modular SBE 29 Temperature Compensated Strain-Gauge Pressure sensor (available in eight depth ranges to suit the operating depth requirement). The SBE 25's modular design makes it easy to configure in the field for a wide range of auxiliary sensors, including optional dissolved oxygen (SBE 43), pH (SBE 18 or SBE 27), fluorescence, transmissivity, PAR, and optical backscatter sensors. More information from Sea-Bird Electronics: http:www.seabird.com.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Cruise_ID	Cruise ID number	unitless	cruise_id
Cast_ID	Cast ID number	unitless	cast
Station_ID	Station ID number	unitless	station
UTC_Date	Date (UTC); format: MM/DD/YYYY	unitless	date
UTC_Time	Time (UTC); format: hh:mm:ss	unitless	time
ISO_DateTime_UTC	Date and time (UTC) formatted to ISO8601 standard: YYYY-MM-DDThh:mm:ssZ	unitless	ISO_DateTime_UTC
Latitude	Latitude	decimal degrees North	lat
Longitude	Longitude	decimal degrees East	lon
Depth	Sample depth	meter (m)	depth
Strain_Gauge_Pressure	Pressure	psi	press
Conductivity	Conductivity	millisiemens per centimeter (mS/cm)	cond
Salinity	Salinty	PSU	sal
Temperature	Water temperature	degrees Celsius	temp
Potential_Temp	Potential temperature	degrees Celsius	potemp
Density	density	kilograms per cubic meter (kg/m^3)	density
Sigma_theta	Sigma theta density	kilograms per cubic meter (kg/m^3)	sigma_theta
Oxygen_mLL	Oxygen concentration	milliliters per liter (ml/l)	O2
Oxygen_pcnt	Oxygen percent saturation	unitless (percent)	O2sat
PAR_Irradiance	PAR irradiance	unitless	PAR
ISUS	Satlantic ISUS (nitrate sensor) measurement in volts	volts	no_bcodmo_term
flag	Flag	unitless	flag

Database

Contribute Data

Dataset: CTD Hydrography
Deployment: SAV-17-02

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: CTD HydrographyDeployment: SAV-17-02

Dataset acquisition description

Dataset Processing Description

Dataset: CTD Hydrography
Deployment: SAV-17-02