Metadata Report for BODC Series Reference Number 1640504

• Metadata Summary

• Problem Reports

• Data Access Policy

• Narrative Documents

• Project Information

• Data Activity or Cruise Information

• Fixed Station Information

• BODC Quality Flags

• SeaDataNet Quality Flags

Metadata Summary

Problem Reports

No Problem Report Found in the Database

Data Access Policy

Open Data supplied by Natural Environment Research Council (NERC)

You must always use the following attribution statement to acknowledge the source of the information: "Contains data supplied by Natural Environment Research Council."

Narrative Documents

Star-Oddi DST centi-TD Temperature and Depth Recorder

Description

The Data Storage Tag (DST) centi-TD is a miniature underwater data logger with temperature and pressure (depth) sensors. Recorded data are stored in the logger's internal memory with a real-time clock reference for each measurement. This sensor is also available with pitch and roll sensors.

The DST pitch and roll is a miniature submersible data logger that measures and records temperature, pressure (depth) and relative pitch and roll (tilt angle) movements of the DST, with reference to the earth gravity. DST pitch and roll measures gravity movements in two directions. Recorded data is stored in the loggers internal memory with a real-time clock reference for each measurement.

The sensors are housed in a strong waterproof cylinder made of alumina (an implantable biocompatible ceramic).

Specifications

* Extended memory capacity of 523,800 measurements is available as a DST centi-ex model.

Further details are available in the manufacturer's centi-TD specification document and centi-TD with pitch and roll specification document.

Wave Hub site temperature logger mooring May 2012: Originator's processing

The temperature logger instruments were deployed from 13 May 2012 to 24 May 2012 using the Plymouth University vessel, RV Falcon Spirit which is a 14 m catamaran.

Data Processing

No post-processing was applied to the files. They were submitted to BODC as raw ASCII format from the instrumentation.

Field Calibrations

No field calibrations were undertaken.

Wave Hub site temperature logger mooring May 2012: Processing by BODC

Data from three instruments arrived at BODC in ASCII files. This includes 2 Star-Oddi DST CTD files, 5 Star-Oddi DST centi-TD files and 9 Star-Oddi DST centi-T files with one file for each sensor used. The following table shows how the variables within the files were mapped to appropriate BODC parameter codes:

The reformatted data were visualised using the in-house visualisation software. Suspect data were marked by adding an appropriate quality control flag, missing data by both setting the data to an appropriate value and setting the quality control flag. The data files have been modified to remove data points that were gathered when the instruments were being deployed and recovered.

Project Information

NERC Discovery Science - Wave Hub baseline study

Background

This proposal has been designed to fill urgent scientific gaps in relation to baseline studies in renewable energy test sites and to take advantage of the unique opportunity presented by the development of the Wave Hub demonstrator site.

This project was funded by the NERC grant - NE/I015108/1 Wave Hub baseline study.

It is essential to obtain this information prior to deployment of infrastructure to understand the impact of arrays of wave devices together with the Wave Hub infrastructure. This opportunity has already been lost at other wave energy device testing sites (such as at European Marine Energy Centre (EMEC), Orkney), because devices, together with infrastructure such as moorings and cabling have already been installed.

This project is also driven by the need to expand the science capability and resources over the next five years to address the questions which have arisen directly in respect of marine renewable energy development and sustainable use of marine resources. Hence, many of the activities are also viewed as capacity building and skill development within Plymouth Marine Laboratory (PML) - Partnership for Research in Marine Renewable Energy (PRIMaRE) that are pivotal to address the scientific requirements of the renewable energy sector.

Scientific Objectives

To obtain:

• Detailed oceanographic study at the Wave Hub site and surrounds - covering the whole range of physical, chemical and biological parameters before the deployment of Wave Hub infrastructure and wave energy devices.
• Ensure data acquisition in time and space to allow development of physical and ecosystem models at scales relevant to wave arrays. Ultimately models will make predictive assessments of the extent, timescales and intensity of ecosystem impacts and perturbation resulting from implementation of wave energy arrays.
• Engagement of environmental economists to ensure these same data can be used to develop economic valuation estimates of critical life supporting ecosystem services at scales appropriate to arrays of wave devices for comparison with other uses of marine space.
• To address the questions which have arisen directly in respect of marine renewable energy development and sustainable use of marine resources.

Fieldwork

The data were acquired from the RV Falcon Spirit, the Plymouth University vessel. The small 14m catermaran was used on a daily basis from 13 May 2012 to 24 May 2012 with the idea to capture high quality, spatially resolved field data ahead of the Wave Hub construction.

Instrumentation

Types of instruments/measurements:

• CTDs
• Moored temperature loggers
• VMADCP
• Moored ADCPs
• Towed undulated CTD

Contacts

Data Activity or Cruise Information

Data Activity

Wave Hub site temperature logger mooring May 2012

The thermistor string was kept upright by a large sub-surface float.

Instruments deployed on the mooring

The DST CTD recorded temperature, conductivity and pressure.

The centi-T recorded temperature.

The centi-TD recorded temperature and pressure.

The Originator has advised that the salinity and pressure readings from the Star-Oddi DST CTD instrument are not of good quality and are to be used with caution.

Instrument codes

DST CTD - Star-Oddi DST CTD

centi-T - Star-Oddi DST centi-T Temperature Recorder

centi-TD - Star-Oddi DST centi-TD Temperature and Depth Recorder

Related Data Activity activities are detailed in Appendix 1

Cruise

Complete Cruise Metadata Report is available here

Fixed Station Information

No Fixed Station Information held for the Series

BODC Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

SeaDataNet Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

Appendix 1: Wave Hub

Related series for this Data Activity are presented in the table below. Further information can be found by following the appropriate links.

If you are interested in these series, please be aware we offer a multiple file download service. Should your credentials be insufficient for automatic download, the service also offers a referral to our Enquiries Officer who may be able to negotiate access.