Dataset: CLASiC CTD
Deployment: PE17-04

Principal Investigator:

Jeffrey W. Krause (Dauphin Island Sea Lab, DISL)

Co-Principal Investigator:

Kanchan Maiti (Louisiana State University Dept. of Oceanography and Coastal Science, LSU-DOCS)

BCO-DMO Data Manager:

Christina Haskins (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

The biotic and abiotic controls on the Silicon cycle in the northern Gulf of Mexico (CLASiC)

Deployment Synonyms:

CLASiC_2016

Data URL:

https://www.bco-dmo.org/dataset-deployment/822210/data

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Description

Methods & Sampling

Dataset acquisition description

Multiple hydrocasts were conducted at stations denoted in the bottle-file metadata. A SeaBird CTD was used with sensors for the following measurements: conductivity/salinity, temperature, pressure, dissolved oxygen, water transmission/attenuation, chlorophyll a fluorescence and photosynthetically active radiation. All hydrocast data were processed to 1-m bins.

Data Processing Description

Dataset Processing Description

SeaBird files were processed in Seasave (Software Version V 7.25.0.151) and binned at 1-m depth intervals.

BCO-DMO Data Manager Processing Notes:
* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
* blank values in this dataset are displayed as "nd" for "no data." nd is the default missing data identifier in the BCO-DMO system.
* removed all spaces in headers and replaced with underscores
* removed all units from headers
* converted dates to ISO Format yyyy-mm-dd
* merged Date_Zulu and Time_Zulu to create ISO_DateTime_UTC and then removed Zulu columns
* set Types for each data column
* merged the CLASiC 2016 and 2017 CTD data files into one dataset
* rounded latitude and longitude to four decimal places

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1558957	NSF Division of Ocean Sciences

Instruments

CTD Sea-Bird SBE 911plus

Supplied Name:

Supplied Description:

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

CTD-fluorometer

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: CTD-fluorometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/113/

Generic Description:

A CTD-fluorometer is an instrument package designed to measure hydrographic information (pressure, temperature and conductivity) and chlorophyll fluorescence.

LI-COR Biospherical PAR Sensor

Supplied Name:

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.

Sea-Bird SBE 43 Dissolved Oxygen Sensor

Supplied Name:

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 {Sea-Bird WETLabs} C-Star transmissometer

Supplied Name:

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_Name	Name of specific cruise, no units	unitless	cruise_name
Cast_Number	CTD Number (chronological)	unitless	cast
Latitude	Latitude of hydrocast, decimal degrees North	decimal degrees	lat
Longitude	Longitude of hydrocast, decimal degrees East	decimal degrees	lon
ISO_DateTime_UTC	Date/Time (UTC) ISO formatted	YYYY-MM-DDTHH:MM:SS[.xx]Z	ISO_DateTime_UTC
Date_Local	Local date of hydrocast	YYYY-MM-DD	date_local
Time_Local	Local time of hydrocast	HH:MM (24 hour clock)	time_local
Depth	[salt water, m]	meter (m)	depth
Temperature	CTD Temperature [ITS-90]	degrees Celsius	temp
Salinity	CTD Salinity	PSU	sal
Specific_Conductance	CTD Conductivity	mS/cm	specc
Oxygen	CTD Oxygen sensor	mg/l	O2
Beam_Transmission	Beam Transmission on WET Labs C-Star	%	trans
Beam_Attenuation	Beam Attenuation on WET Labs C-Star	1/m	beam_cp
Fluorescence	Chlorophyll Fluorescence	ug/l	fluor
PAR_Irradiance	Photosynthetically Active Radiation/Irradiance, Biospherical Instruments	uE/m2/s	PAR

Database

Contribute Data

Dataset: CLASiC CTD
Deployment: PE17-04

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: CLASiC CTDDeployment: PE17-04

Dataset acquisition description

Dataset Processing Description

Dataset: CLASiC CTD
Deployment: PE17-04