Metadata Report for BODC Series Reference Number 343691

• 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

These data have no specific confidentiality restrictions for users. However, 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 acknowledgment.

If the Information Provider does not provide a specific attribution statement, or if you are using Information from several Information Providers and multiple attributions are not practical in your product or application, you may consider using the following:

"Contains public sector information licensed under the Open Government Licence v1.0."

Narrative Documents

Neil Brown Smart Conductivity, Temperature and Depth profiler

The Smart CTD was developed by WHOI, Neil Brown Instrument Systems and MIT and consists of an internally recording CTD which can be programmable to accommodate various sampling schemes. The data retrieval is done via connectors to a computer, where it is digitally logged.

This instrument was designed to be used with minimal technical expertise and to be replaced if problems arise, rather than being repaired at sea.

RV Gorsethorn Cruise 1/88 CTD Data Documentation

Introduction

Documentation for the CTD data collected on RV Gorsethorn 1/88 (October - November 1988) by the Scottish Marine Biological Association, Oban, Argyll, Scotland, UK, under the direction of D. J. Ellett.

Instrumentation

The instrument used was a Neil Brown CTD system. Instrument lowering and raising speeds were between 0.5m/s and 1m/s. An acoustic pinger was placed above the CTD to give an accurate depth measurement, this could then be used to check the CTD pressure calibration. An NIO bottle with reversing thermometers was placed above the pinger, within 2m of the CTD system. A bottle sample was taken at the bottom of the cast providing the temperature and salinity are uniform at that point. If large temperature or salinity gradients were present then the bottle sample was triggered at a suitable site on the upcast. A surface salinity sample was also taken at the start of the dip.

Calibration and Data Quality

The CTD was not calibrated in the laboratory. The manufacturer's calibration was used.

Data Processing

Obvious wild points were edited out of the data and the manufacturer's calibration was applied. Conductivities were converted to conductivity ratios and then converted to salinities using UNESCO recommended routines and sigma-t was calculated. The data values were then sieved to ensure a minimum separation between pressure values of 1 dbar. The data were then visually inspected and major spikes flagged.

Reference

Fofonoff, N.P. and Millard Jr., R.C. (1983).
Algorithms for the computation of fundamental properties of sea water. UNESCO Technical Paper on Marine Science 44.

Project Information

North Atlantic Norwegian Sea Exchange (NANSEN)

The North Atlantic Norwegian Sea Exchange (NANSEN) Project was conceived by the ICES Oceanic Hydrography Working Group, and arose from discussions centred around the oceanography of the southeast of Iceland and of the Faroese channels. NANSEN was not a closely coordinated one time survey, but rather provided a framework through which work in these areas could be encouraged.

Several UK cruises were undertaken in support of NANSEN, collecting both moored current meter and CTD data.

Data Activity or Cruise Information

Cruise

Complete Cruise Metadata Report is available here

Fixed Station Information

Fixed Station Information

DML North Channel CTD Stations/Sections

The North Channel region, between Northern Ireland and the west coast of Scotland, has been extensively surveyed since the late 1970s (especially in the 1980s) by numerous research and government institutes. The region contains several repeated hydrographic stations, some of which collectively form transects. These repeated survey transects represent the southernmost part of a greater network of similar sections on the western Scottish continental shelf which were established by Dunstaffnage Marine Laboratory (DML).

Map of standard North Channel CTD Stations

Map produced using the GEBCO Digital Atlas.

The upwards-pointing triangles indicate the nominal positions of individual Line A stations, the single downwards-pointing triangle indicates the nominal position of the Larne - Stranraer midway station. Nominal positions of Line Y and Z stations are shown by the circles and squares respectively. Measurements made at Northern Channel CTD stations lie within a box bounded by co-ordinates 54.667° N, 6° W at the south west corner and 55.283° N, 5.083° W at the north east corner.

Nominal station details:

DML Line A: Kintyre (Scotland) - Antrim (Northern Ireland)

DML Station LS: Larne (Northern Ireland) - Stranraer (Scotland) midway station

DML Line Y: Corsewall (Stranraer, Scotland) - Sanda Island (Kintyre, Scotland)

DML Line Z: Copeland Islands (Northern Ireland) - Portpatrick (Scotland)

Related Fixed Station activities are detailed in Appendix 1

Fixed Station Information

DML Line Z

Line Z is a survey section in the North Channel between Northern Ireland and Stranraer (Scotland). The line comprises six fixed CTD stations, which were established as part of routine monitoring work on the Scottish continental shelf by Dunstaffnage Marine Laboratory (DML). The line was occupied in the 1980s and 1990s.

Nominal station details:

DML Line Z: Copeland Islands (Northern Ireland) - Portpatrick (Stranraer, Scotland)

Related Fixed Station activities are detailed in Appendix 2

Fixed Station Information

DML Station 2Z

Station 2Z is one of six fixed CTD stations between Northern Ireland and Stranraer (Scotland), established by scientists at Dunstaffnage Marine Laboratory (DML).

Related Fixed Station activities are detailed in Appendix 3

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: DML North Channel CTD Stations/Sections

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.

Appendix 2: DML Line Z

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.

Appendix 3: DML Line Z Station 2Z

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.