Dataset: CTD_dh
Deployment: SJ9506

Seward Johnson CTD casts, Georges Bank, 1995

Principal Investigator:

Dave Hebert (University of Rhode Island, URI-GSO)

BCO-DMO Data Manager:

Ms Dicky Allison (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

U.S. GLOBEC Georges Bank (GB)

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/450400/data

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Description

CTD Observations, 1995 Seward Johnson Process Cruises

CTD Processing Notes and Comments:

Re: SJ9506

Seward Johnson cruise SJ9506 25 Apr - 3 May 1995; using the (NBIS Mark III) CTD system.

Calibrated CTD files provided by R. Limeburner, WHOI.

Re: SJ9508

Seward Johnson cruise SJ9508 6 - 16 June 1995; using the (NBIS Mark III) CTD system.

Calibrated CTD files were prepared by R. Limeburner except for stations 1, 37, 51 and 61 which were processed by Russ Burgett, URI.

There was no station 95 for this cruise.

Examination of the files showed the salinity (and sigma_t) to be suspect. The salinty and sigma_t fields have been manually edited and obvious problems marked as no data (nd), however care should be taken when using the salinity and sigma_t from these files. Pressure, temperature, salinity and sigma_t from a SeaBird CTD added to the Seward Johnson CTD package are available for casts 112-114, 116, 124-128, 130-136, 138-140, 142-151, 153-160, 162, 164-172, and 174-185. It is recommended to use these files when possible. They are available as a separate object.

Examination of the unprocessed CTD files showed a 4 dbar pressure offset in the CTD calibration. This offset was added to the pressure in the calibrated files.

Re: SJ9508sb

Seward Johnson cruise SJ9508 6 - 16 June 1995; using the (Seabird SBE-25) CTD system.

The Seabird CTD was added to the Seward Johnson CTD package after cast 111 due to poor quality conductivity data. Seabird casts 112-114, 116, 124-128, 130-136, 138-140, 142-151, 153-160, 162, 164-172, and 174-185 are available in this data set.

Contributor:
David Hebert
University of Rhode Island
Graduate School of Oceanography
Narragansett, RI 02882-1197 

voice:  401 874 6610
fax:    401 874 6728
email:  hebert@gso.uri.edu

Data Prepared by:
Russ Burgett 
University of Rhode Island
Graduate School of Oceanography

Updated December 1, 2004; gfh

Methods & Sampling

Dataset acquisition description

SJ9508 Seabird CTD Stations. Using the (Seabird SBE-25) CTD system.

Deployment-specific acquisition description

SJ9506 CTD Stations 1- 108. Using the (NBIS Mark III) CTD system.

Data Processing Description

Dataset Processing Description

Calibrated CTD files were prepared by R. Limeburner except for stations 1, 37, 51 and 61 which were processed by Russ Burgett, URI.

There was no station 95 for this cruise.

Examination of the unprocessed CTD files showed a 4 dbar pressure offset in the CTD calibration. This offset was added to the pressure in the calibrated files.

More information about this dataset deployment

Funding

Award Number	Funding Source
unknown GB NOAA	National Oceanic and Atmospheric Administration
unknown GB NSF	National Science Foundation

Instruments

CTD Neil Brown Mark III

Supplied Name: MkIIICTD

Supplied Description:

NBIS Mark III CTD system.

Instrument Type

Generic Name: CTD Neil Brown Mark III

Acronym: CTD NBIS MK3

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0002/

Generic Description:

The Neil Brown Instrument Systems Mark III Conductivity, Temperature, Depth (CTD) instrument is an integral unit containing pressure, temperature and conductivity sensors with an optional dissolved oxygen sensor in a pressure-hardened casing. Developed in the 1970s, the Neil Brown CTD unit was able to digitize conductivity, temperature and pressure measurements at sufficient speeds to permit oceanographers to study 10 cm features at winch lowering speeds of 30 meters per minute. The most widely used variant in the 1980s and 1990s was the MK3B. The MK3C fitted with an improved pressure sensor to reduce hysteresis was developed to meet the requirements of the WOCE project. The instrument is no longer in production, but is supported (repair and calibration) by General Oceanics.

CTD Sea-Bird

Supplied Name: SeabirdCTD

Supplied Description:

Seabird SBE-25 CTD system. Pressure, temperature, salinity and sigma_t from a SeaBird CTD added to the Seward Johnson MkIIICTD package.

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cruiseid	cruise identification		no_bcodmo_term
year	year		year
brief_desc	brief cruise description, i.e.: broad-scale, process, mooring		brief_desc
station	station number		station
lat	latitude, negative = South	decimal degrees	lat
lon	longitude, negative = West	decimal degrees	lon
yrday_gmt	day of year based on Julian calender, GMT	decimal day	yrday_gmt
press	depth of sample reported as pressure	decibars	press
temp	temperature	degrees C.	temp
sal	salinity, psu		sal
sigma_t	sigma_t	kg/m<Sup>3</Sup>	sigma_t
flvolt	fluorescence	volts	flvolt

Database

Contribute Data

Dataset: CTD_dh
Deployment: SJ9506

CTD Observations, 1995 Seward Johnson Process Cruises

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: CTD_dhDeployment: SJ9506

CTD Observations, 1995 Seward Johnson Process Cruises

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: CTD_dh
Deployment: SJ9506