Metadata Report for BODC Series Reference Number 1167222

• 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

Centre for Environment, Fisheries and Aquaculture Science (Cefas) data access conditions

The Centre for Environment, Fisheries and Aquaculture Science (Cefas) is an Executive Agency of the Department of Environment, Food and Rural Affairs (Defra), formerly the Ministry of Agriculture, Fisheries and Food (MAFF). It was also known previously as the Directorate of Fisheries Research (DFR). This data policy refers to data collected by the organisation under all titles.

• These data have no specific confidentiality restrictions for academic users. However data are restricted for commercial requests and clearance must be obtained by BODC from Cefas before they are released.
• Users must acknowledge data sources as it is not ethical to publish data without proper attribution. Any publication or other output resulting from usage of the data should include an acknowledgement.
• The recommended acknowledgement is: "This study uses data from the Centre for Environment, Fisheries and Aquaculture Science (Cefas), provided by the British Oceanographic Data Centre."

Narrative Documents

Falmouth Scientific Inc. OEM CT sensor

The OEM CT sensor is designed to provide high accuracy conductivity and temperature measurements in a package that can be readily integrated into user systems. The CT sensor relies on an inductively coupled conductivity sensor, with a large inside diameter that eliminates the need for pumps. A high grade Platinum Resistance Thermometer is used to measure temperature.

Sensor specifications are given in the table below. Since 2009 this instrument has been manufactured by Teledyne RD Instruments as a Citadel CT-EK Sensor. More information about the instrument can be found on the Teledyne Citadel specification sheet.

Sensor Specifications

LI-COR LI-192 Underwater Quantum Sensor

The LI-192 Underwater Quantum Sensor is used to measure photosynthetic photon flux density and is cosine corrected. The sensor is often referred to as LI-192SA or LI-192SB (the LI-192SB model was superseded by LI-192SA). One of the main differences is that the LI-192SA model includes a built-in voltage output for interfacing with NexSens iSIC and SDL data loggers.

Sensor specifications, current at January 2012, are given in the table below. More information can be found in the manufacturer's LI-192SA andLI-192SB specification sheets.

Sensor Specifications

(Specifications apply to both models unless otherwise stated)

Data processing by originator

Instruments and methods for all North Dogger SmartBuoy deployments are described by Greenwood et al. (2010). The near-surface rig on the SmartBuoy mooring was equipped with the following instruments:

In situ measurements

In situ sensors were mounted at 1 m depth, or 1 m and 2 m for the PAR sensors. A solid state data logger (ESM-2) designed and built by Centre for Environment, Fisheries and Aquaculture Science (Cefas, UK) was used for data acquisition and sensor control. Measurements were recorded at a frequency of 1 Hz, with a burst frequency of two per hour, and a burst duration of between 5 and 10 minutes.

The in situ salinity data were bench calibrated.

Discrete sample collection and analysis

Discrete samples for calibration were collected by CTD rosette sampler, during visits to the mooring. Data from CTD samples have not been merged into the mooring data set.

References

Greenwood N., Parker E.R., Fernand L., Sivyer D.B., Weston K., Painting S.J., Kröger S., Forster R.M., Lees H.E., Mills D.K., Laane R.W.P.M., 2010. Detection of low bottom water oxygen concentrations in the North Sea; implications for monitoring and assessment of ecosystem health. Biogeosciences, 7, 1357-1373.

Processing by BODC

The processed and quality-controlled data were supplied to BODC in a bulk, ASCII format file. Accompanying files provided instrument metadata. The data were converted into BODC's standard format, with one file for each rig deployment. The data were visually screened, taking into account comparisons between related parameters, and the environmental context. No major data issues were identified, but there may be some gaps in the data series, due to instrument failures.

Project Information

No Project Information held for the Series

Data Activity or Cruise Information

Data Activity

No Document Information Held for the Series

Related Data Activity activities are detailed in Appendix 1

Cruise

Complete Cruise Metadata Report is available here

Fixed Station Information

Fixed Station Information

Cefas North Dogger SmartBuoy mooring site

Cefas maintained a SmartBuoy mooring site at the north of Dogger Bank, 55°40.27'N, 2°17.88'E, in approximately 80 m of water, from 24/02/2007 to 15/09/2008.

Normally two sensor suites were deployed on the mooring during each deployment: one near-surface (about 1 m); and one at thermocline depth (25 m or 31 m).

The near-surface frame was typically equipped as follows:

The mid-tether frame was typically equipped as follows:

The SmartBuoy mooring was first deployed on Cefas Endeavour cruise 3/07. Data were relayed to shore every two hours. The mooring was deployed for several months at a time, after which it was serviced, sensors replaced or repositioned, samples recovered, and then it would be re-deployed. In total, there were seven individual deployments at the North Dogger site:

SmartBuoy deployments at the North Dogger site were funded by Marine Ecosystem Connections: essential indicators of healthy, productive and biologically diverse seas, a project funded by the UK Government's Department for Environment, Food and Rural Affairs (Defra project code ME3205).

Related Fixed Station activities are detailed in Appendix 2

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: NDOGGER_APR08_SEP08

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.

Appendix 2: Cefas North Dogger

Related series for this Fixed Station 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.