Metadata Report for BODC Series Reference Number 524911

• 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

VEMCO Minilog12-TR temperature logger

Description

The VEMCO Minilog12-TR is a miniature data logger that records temperature at a user programmed time interval. It is housed in a waterproof cylinder and the temperature sensor is mounted on a protruding stainless steel probe.

Specifications

For more information please see the Manufacturer's information sheet.

BODC Moored Meter Temperature Screening Procedures

BODC screen both the series header qualifying information and the parameter values in the data cycles themselves.

Header information is inspected for:

• Irregularities such as unfeasible values.

• Inconsistencies between related information, for example:

  • Depths of meter and sea bed
  • Times for mooring deployment and for start/end of data series
  • Length of record or number of data cycles, the cycle interval, the clock error and the period over which accrued

• Originator's comments on meter/mooring performance, data quality and parameters measured and the parameters actually present in the data cycles.

Documents are written by BODC highlighting irregularities which cannot be resolved.

Data cycles are inspected via time series plot presentations of parameters. These presentations undergo intrinsic and extrinsic screening to detect infeasible values within the data cycles themselves and inconsistencies as seen when comparing characteristics of adjacent data sets displaced with respect to depth, position or time.

Values suspected of being of non oceanographic origin may be tagged with the BODC flag denoting suspect value.

The following types of irregularity, each relying on visual detection in the time series plot, are amongst those which may be flagged as suspect:

• Spurious data at the start or end of the record.

• Obvious spikes of non oceanographic origin.

If a large percentage of the data are affected by irregularities, deemed abnormal, then instead of flagging the individual suspect values, a caution may be documented.

Inconsistencies between the characteristics of the data set and those of its neighbours, as for example between the maximum and minimum values of the parameters (spikes excluded) are, where necessary, documented.

This intrinsic and extrinsic screening of the parameter values seeks to confirm the qualifying information and the source laboratory's comments on the series. In screening and collating information, every care is taken to ensure that errors of BODC making are not introduced.

Project Information

DISCO

DISCO was a multidisciplinary study of the routes, rates and controls on the biogeochemical cycling of dimethyl sulphide (DMS) within a bloom of the coccolithophorid alga, Emiliania huxleyi. The sampling took place on RRS Discovery cruise 241, between 5 June and 1 July 1999, in the northern North Sea. A survey of the region was carried out in order to locate an E. huxleyi bloom suitable for the study. The chosen bloom was labelled with SF6 tracer, and the biogeochemical process study followed the patch as it drifted in a SE direction and was eventually subducted under Norweigian coastal water on 26 June.

The research was organised by NERC's Plymouth Marine Laboratory and involved scientists from 8 institutions. DISCO was funded principally by NERC through Core Strategic and Responsive Mode Funds and by MOD DERA JGS Grant (TD/10/3/5).

Data Activity or Cruise Information

Data Activity

Proudman Oceanographic Laboratory Moored Instrument Rig #831

This rig was deployed as part of the DYME DISCO project at site 17/13. It was attached to a drifting hydrosphere RVS/GPS buoy, ARGOS 01954 (B2).

Miniloggers (temperature sensors) were attached to this rig at the following depths below the water surface:

The buoy was recovered on 17 June at 19:03 due to problems with the transmitter and suspect buoyancy.Position:58.871° N, 2.010° E

It was combined with a different hydrosphere buoy, ARGOS 01953 (B4) and redeployed on 17 June at 20:10.

The following table gives the position of the ARGOS buoy throughout the period of its deployment.

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: POLRIG#831

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.