Metadata Report for BODC Series Reference Number 1689444
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
Data Description |
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Data Identifiers |
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Time Co-ordinates(UT) |
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Spatial Co-ordinates | |||||||||||||||||||||||||||||||||||||
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Parameters |
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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
Pigments as part of the PRIME project
Parameter Code Definitions
| CPHLFLP1 | Fluorometric chlorophyll-a | µg/litre |
| Fluorometric assay of acetone extract (GF/F filtered) | ||
| CPHLFLP2 | Fluorometric chlorophyll-a | µg/litre |
| Fluorometric assay of acetone extract (0.4/0.45 µm pore filtered) | ||
| CPHLFLP5 | Fluorometric chlorophyll-a | µg/litre |
| Fluorometric assay of acetone extract (0.2 µm pore filtered) | ||
| CPHLPR01 | In-situ fluorometer chlorophyll | µg/litre |
| Calibrated in-situ fluorometer | ||
| CPHLZZXX | Chlorophyll-a | µg/litre |
| Unspecified methodology | ||
| PHAEFLP1 | Fluorometric phaeopigments | µg/litre |
| Fluorometric assay of acetone extract (GF/F filtered) | ||
| PHAEFLPZ | Fluorometric phaeopigments | µg/litre |
| Fluorometric assay of acetone extract (filter unspecified) | ||
| SCHLFLPA | Size-fractionated fluorometric chlorophyll-a | µg/litre |
| Fluorometric assay of acetone extract (>5 µm fraction) | ||
| SCHLFLPC | Size-fractionated fluorometric chlorophyll-a | µg/litre |
| Fluorometric assay of acetone extract (2-5 µm fraction) | ||
| SCHLFLPD | Size-fractionated fluorometric chlorophyll-a | µg/litre |
| Fluorometric assay of acetone extract (1-5 µm fraction) | ||
| SCHLFLPL | Size-fractionated fluorometric chlorophyll-a | µg/litre |
| Fluorometric assay of acetone extract (GF/F-20 µm fraction) |
Originator Code Definitions
| 2 | Dr. Duncan Purdie | Southampton Oceanography Centre |
| 16 | British Oceanographic Data Centre | |
| 36 | Dr. Roger Harris | CCMS Plymouth Marine Laboratory |
| 39 | Mr. Bob Head | CCMS Plymouth Marine Laboratory |
| 127 | PRIME Project Office | |
| 136 | Dr. Graeme Hays | University of Wales, Swansea |
Originator Protocols
Mr. Bob Head and Dr. Roger Harris
Samples (100 ml) were taken from the non-toxic supply and filtered, either through GF/F or pore filters for the size-fractionated work. Pigments were extracted on board ship using 90% acetone and assayed fluorometrically before and after the addition of acid on a Turner 111 bench fluorometer. The fluorometer was calibrated using known concentrations of chlorophyll a standard in 90% acetone.
Dr. Duncan Purdie
Samples of 1-2 litres were filtered, extracted into 10 ml acetone for 24-72 hours and assayed on a Turner bench fluorometer.
British Oceanographic Data Centre
Calibrated fluorometer values from the CTD downcasts at depths corresponding to the bottle firings have been determined by BODC and stored in the database. A Chelsea Instruments Aquatracka fluorometer was used, calibrated against fluorometric chlorophyll a data by BODC.
Non-toxic (underway) sea water supply
A source of uncontaminated near-surface (commonly 3 to 7 m) seawater pumped continuously to shipboard laboratories on research vessels. There is typically a temperature sensor near the intake (known as the hull temperature) to provide measurements that are as close as possible to the ambient water temperature. The flow from the supply is typically directed through continuously logged sensors such as a thermosalinograph and a fluorometer. Water samples are often collected from the non-toxic supply. The system is also referred to as the underway supply.
Project Information
No Project Information held for the Series
Data Activity or Cruise Information
Cruise
| Cruise Name | D221 |
| Departure Date | 1996-06-11 |
| Arrival Date | 1996-07-23 |
| Principal Scientist(s) | Graham Savidge (Queen's University Belfast School of Biological Sciences) |
| Ship | RRS Discovery |
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:
| Flag | Description |
|---|---|
| Blank | Unqualified |
| < | Below detection limit |
| > | In excess of quoted value |
| A | Taxonomic flag for affinis (aff.) |
| B | Beginning of CTD Down/Up Cast |
| C | Taxonomic flag for confer (cf.) |
| D | Thermometric depth |
| E | End of CTD Down/Up Cast |
| G | Non-taxonomic biological characteristic uncertainty |
| H | Extrapolated value |
| I | Taxonomic flag for single species (sp.) |
| K | Improbable value - unknown quality control source |
| L | Improbable value - originator's quality control |
| M | Improbable value - BODC quality control |
| N | Null value |
| O | Improbable value - user quality control |
| P | Trace/calm |
| Q | Indeterminate |
| R | Replacement value |
| S | Estimated value |
| T | Interpolated value |
| U | Uncalibrated |
| W | Control value |
| X | Excessive difference |
SeaDataNet Quality Control Flags
The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:
| Flag | Description |
|---|---|
| 0 | no quality control |
| 1 | good value |
| 2 | probably good value |
| 3 | probably bad value |
| 4 | bad value |
| 5 | changed value |
| 6 | value below detection |
| 7 | value in excess |
| 8 | interpolated value |
| 9 | missing value |
| A | value phenomenon uncertain |
| B | nominal value |
| Q | value below limit of quantification |
