Dataset: CTD_sbe_dh
Deployment: SJ9508

Seward Johnson CTD casts - from Seabird CTD, Georges Bank, 1995.

Principal Investigator:

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

Project:

U.S. GLOBEC Georges Bank (GB)

Current State:

Final no updates expected

Version:

20110118

Version Date:

2011-01-18

Data URL:

https://www.bco-dmo.org/dataset-deployment/453472/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

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 NSF	National Science Foundation

Instruments

Sea-Bird SBE 25 Sealogger CTD

Supplied Name: CTD Sea-Bird 25

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
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_sbe_dh
Deployment: SJ9508

CTD Observations, 1995 Seward Johnson Process Cruises

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: CTD_sbe_dhDeployment: SJ9508

CTD Observations, 1995 Seward Johnson Process Cruises

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: CTD_sbe_dh
Deployment: SJ9508