Dataset: CTD Data

Name: CTD profile data from Virginia Aquarium Climate Change Facility, Virginia Beach VA; 2011-2015 (Impact of Climate on Eelgrass project)
Published: 2015-03-13
Keywords: oceans

Cite This Dataset

Spatial Extent: N:36.82105 E:-75.98333 S:36.82105 W:-75.98333

Project:

Impact of Climate Warming and Ocean Carbonation on Eelgrass (Zostera marina L.) (Impact of Climate on Eelgrass)

Principal Investigator:

Richard C. Zimmerman (Old Dominion University, ODU)

Co-Principal Investigator:

Victoria J. Hill (Old Dominion University, ODU)

W. Mark Swingle (Virginia Aquarium)

Contact:

Mr David Ruble (Old Dominion University, ODU)

Richard C. Zimmerman (Old Dominion University, ODU)

BCO-DMO Data Manager:

Stephen R. Gegg (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

13 March 2015

Version Date:

2015-03-13

Current State:

Final no updates expected

CTD profile data from Virginia Aquarium Climate Change Facility, Virginia Beach VA; 2011-2015 (Impact of Climate on Eelgrass project)

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Description

Eelgrass Climate Impacts
Experimental conditions, growth and survival of eelgrass
CTD Data - Date, Salinity, Water Temperature

Methods & Sampling

Salinity: Conductivity and temperature data were recorded at 10 minute intervals using a factory-calibrated CTD (Sea-Bird Model SBE-37) placed in Experimental Tank 11.

Temperature data were recorded in each of the 20 experimental tanks using Omega 4404 precision thermistor elements connected to a custom-designed voltage divider circuit linked to a National Instruments data logger controlled by custom software written in LabView.

Data Processing Description

Salinity - Raw data were processed to temperature (° C) and salinity (practical salinity scale) using instrument-specific software (Sea Term Ver. 1.59 and Data Conversion Ver. 7.22.5, provided by Sea Bird). Mean daily values of temperature and salinity were calculated from the 10 minute records and provided in this spreadsheet. 10 minute records of the processed data, along with raw data files are available from the PIs, upon request.

Temperature - Thermistors were individually calibrated to a precision of 0.01 ° C across a temperature range of 5° to 30° C in a temperature controlled water bath every six months. Mean daily values of temperature for each tank were calculated from the 10 minute records and provided in this spreadsheet. 10 minute records of the processed data, along with raw data files are available from the PIs, upon request.

BCO-DMO Processing Notes
- Generated from original file: "BORG_SeaGrass_Full_data_Records.xlsx" Sheet: "CTD" contributed by David Ruble
- Approx Lat/Lon of Virginia Aquarium Climate Change Facility appended to enable data discovery in MapServer
- Parameters modified to conform to BCO-DMO parameter naming conventions (Choosing a Parameter Name)

Data Files

File
CTD_Data.csv (Comma Separated Values (.csv), 23.36 KB) MD5:305f96076d1383f0a9d2dbc35edb22d8 Primary data file for dataset ID 504838

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1061823

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
lab_Virginia_Aquarium_Climate_Change_Facility	VACCF Lab	2011-02-01	Virginia Aquarium Climate Change Facility	Richard C. Zimmerman (Principal Investigator)	data info

Instruments

CTD Sea-Bird MicroCAT 37

Supplied Name: Sea-Bird Model SBE-37

Supplied Description:

Salinity: Conductivity and temperature data were recorded at 10 minute intervals using a factory-calibrated CTD (Sea-Bird Model SBE-37) placed in Experimental Tank 11.

Instrument Type

Generic Name: CTD Sea-Bird MicroCAT 37

Acronym: CTD MicroCAT 37

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/350/

Generic Description:

The Sea-Bird MicroCAT CTD unit is a high-accuracy conductivity and temperature recorder based on the Sea-Bird SBE 37 MicroCAT series of products. It can be configured with optional pressure sensor, internal batteries, memory, built-in Inductive Modem, integral Pump, and/or SBE-43 Integrated Dissolved Oxygen sensor. Constructed of titanium and other non-corroding materials for long life with minimal maintenance, the MicroCAT is designed for long duration on moorings.

In a typical mooring, a modem module housed in the buoy communicates with underwater instruments and is interfaced to a computer or data logger via serial port. The computer or data logger is programmed to poll each instrument on the mooring for its data, and send the data to a telemetry transmitter (satellite link, cell phone, RF modem, etc.). The MicroCAT saves data in memory for upload after recovery, providing a data backup if real-time telemetry is interrupted.

Thermistor

Supplied Name: Omega 4404 precision thermistor elements

Supplied Description:

Instrument Type

Generic Name: Thermistor

Generic Description:

A thermistor is a type of resistor whose resistance varies significantly with temperature, more so than in standard resistors. The word is a portmanteau of thermal and resistor. Thermistors are widely used as inrush current limiters, temperature sensors, self-resetting overcurrent protectors, and self-regulating heating elements.

Thermistors differ from resistance temperature detectors (RTD) in that the material used in a thermistor is generally a ceramic or polymer, while RTDs use pure metals. The temperature response is also different; RTDs are useful over larger temperature ranges, while thermistors typically achieve a higher precision within a limited temperature range, typically 90C to 130C.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Lab_Id	Lab Id – Lab identifier where experiments were conducted	text	laboratory
Lat	Approximate Latitude Position of Lab; South is negative	decimal degrees	lat
Lon	Approximate Longitude Position of Lab; West is negative	decimal degrees	lon
date	Date	yyyymmdd	date
sal	Salinity	PSS	sal
Wt	Water temperature	degreesC	temp

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Database

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Dataset: CTD Data