Metadata Report for BODC Series Reference Number 1683878
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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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
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.
AMT10 pigment composition by HPLC analysis from surface underway samples
Data Acquisition and Analysis
These data originate from samples taken from the ships' non-toxic seawater supply at 7 m depth between 12 April and 8 May 2000. Seawater samples for HPLC analysis were filtered using Whatman GF/F filters and placed in cryovials. The samples were then flash frozen using a liquid nitrogen dry shipper for later analysis. HPLC analysis was undertaken using a photo diode array detector in order to isolate individual absorption of pigments.
References Cited
Section not relevant.
BODC Data Processing Procedures
Data were submitted to BODC in Microsoft Excel spreadsheet format and saved to the archive with reference PML020060. The file was provided to BODC with sample number, volume filtered, depth, latitude and longitude as metadata and these were checked against information held in the database and the cruise report. The originators file did not contain date or time, so the sample number was used to match samples to the cruise report log. There was a discrepancy for originators sample a10-14-nt: the date should be 25 April 2000 not 26 April 2000. The originators file also contained HPLC analysis for CTD bottle samples, which were loaded as a separate dataset (HPLC pigments, CTD bottles).
Parameter codes defined in the BODC parameter dictionary were assigned to each variable. All parameters, except Chl-a, were provided in nanograms per litre which were consistent with the units of the BODC parameter code assigned. The Chl-a values were provided in ng/l and so converted to milligrams per cubic metre. Data were then loaded to the database using established BODC data banking procedures.
A parameter mapping table is provided below.
| Originator's Parameter | Units | Description | BODC Parameter Code | Units | Comments |
|---|---|---|---|---|---|
| chlc3 | ng l-1 | Concentration of chlorophyll-a {chl-a} per unit volume of the water body [particulate <GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) | CLC3HPP1 | ng l-1 | - |
| chlc2 | ng l-1 | Concentration of chlorophyll-c2 {chl-c2} per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) | CLC2HPP1 | ng l-1 | - |
| peridinin | ng l-1 | Concentration of peridinin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) | PERIHPP1 | ng l-1 | - |
| but | ng l-1 | Concentration of 19'-butanoyloxyfucoxanthin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) | BUTAHPP1 | ng l-1 | - |
| fuco | ng l-1 | Concentration of fucoxanthin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) | FUCXHPP1 | ng l-1 | - |
| hex | ng l-1 | Concentration of 19'-hexanoyloxyfucoxanthin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) | HEXOHPP1 | ng l-1 | - |
| viol | ng l-1 | Concentration of violaxanthin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) | VILXHPP1 | ng l-1 | - |
| allo | ng l-1 | Concentration of alloxanthin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) | ALLOHPP1 | ng l-1 | - |
| zea | ng l-1 | Concentration of zeaxanthin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) | ZEOXHPP1 | ng l-1 | - |
| chlb | ng l-1 | Concentration of chlorophyll-b per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) | CHLBHPP1 | ng l-1 | - |
| div chla | ng l-1 | Concentration of divinyl chlorophyll-a per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) | DVCAHPP1 | ng l-1 | - |
| chla | ng l-1 | Concentration of chlorophyll-a {chl-a} per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) | CPHLHPP1 | mg m-3 | Unit conversion /1000 applied |
Data Quality Report
Section not relevant.
Problem Report
Section not relevant.
Project Information
The Atlantic Meridional Transect (AMT) - Phase 1 (1995-2000)
Who was involved in the project?
The Atlantic Meridional Transect (AMT) programme was designed by and implemented as a collaboration between Plymouth Marine Laboratory (PML) and Southampton Oceanography Centre (SOC). The programme was hosted by Plymouth Marine Laboratory and involved additional researchers from UK and international universities throughout its duration.
What was the project about?
When AMT began in 1995 the programme provided a platform for international scientific collaboration, including the calibration and validation of SeaWiFs measurements and products. The programme provided an exceptional opportunity for nationally and internationally driven collaborative research and provided a platform for excellent multi-disciplinary oceanographic research. As an in situ observation system, the data collected by the AMT consortium informed on changes in biodiversity and function of the Atlantic ecosystem during this period of rapid change to our climate and biosphere.
The scientific aims were to assess:
- mesoscale to basin scale phytoplankton processes
- the functional interpretation of bio-optical signatures
- the seasonal, regional and latitudinal variations in mesozooplankton dynamics
When was the project active?
The first phase of the AMT programme ran from 1995 to 2000 and consisted of a total of 12 cruises. A second phase of funding allowed the project to continue for the period 2002 to 2006 with a further 6 cruises.
Brief summary of the project fieldwork/data
The AMT programme undertook biological, chemical and physical oceanographic research during the annual return passage of the RRS James Clark Ross between the UK and the Falkland Islands or the RRS Discovery between the UK and Cape Town, a distance of up to 13,500 km. This transect crossed a range of ecosystems from sub-polar to tropical and from euphotic shelf seas and upwelling systems to oligotrophic mid-ocean gyres. The transect route was covered north-south in September/October and south-north in April/May of each year.
The measurements of hydrographic and bio-optical properties, plankton community structure and primary production completed on the first 12 transects (1995-2000) represent the most coherent set of repeated biogeochemical observations over ocean basin scales. This unique dataset has led to several important discoveries concerning the identification of oceanic provinces, validation of ocean colour algorithms, distributions of picoplankton, identifying new regional sinks of pCO2 and variability in rates of primary production and respiration.
Who funded the project?
The programme was funded by the Natural Environment Research Council (NERC) and further support was received from the National Aeronautics and Space Administration (NASA) with equipment and funding from the Sea-viewing Wild Field-of-view Sensor (SeaWiFS) project.
Data Activity or Cruise Information
Cruise
| Cruise Name | JR20000412 (AMT10, JR49) |
| Departure Date | 2000-04-12 |
| Arrival Date | 2000-05-08 |
| Principal Scientist(s) | Chris Gallienne (Plymouth Marine Laboratory) |
| Ship | RRS James Clark Ross |
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 |
