Metadata Report for BODC Series Reference Number 671935
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
RRS Discovery 267 75kHz VMADCP
Deployment and originator's processing
Two RDI Vessel-Mounted Acoustic Doppler Current Profilers (VM-ADCPs) were operated on Discovery 267; the 75kHz VM-ADCP and the 75kHz Phased Array instrument (Ocean Surveyor) that had been fitted immediately prior to FISHES (Discovery 253, May-June 2001). The 150 kHz ADCP is mounted in the hull 1.75 m to port of the keel, 33 m aft of the bow at the waterline and at an approximate depth of 5 m. The 75 kHz ADCP is mounted in a second well in the hull, but 4.15 m forward and 2.5 m to starboard of the 150 kHz well.
BODC processing
A total of 24 files were submitted to BODC. The data were supplied in P* binary format. The following variables were transferred to BODC QXF format (a BODC-defined subset of NetCDF and BODC's format for 2 dimensionsal datacycle storage) using transfer process tr339.
| BODC Code | Description | Units | Originator's variable |
|---|---|---|---|
| ALATGP01 | Latitude | degrees | lat |
| ALONGP01 | Longitude | degrees | lon |
| AADYAA01 | Date (time from 00:00 01/01/1760 to 00:00 UT on day) | days | time |
| AAFDZZ01 | Time (time between 00:00 UT and timestamp) | days | time |
| APEWGP01 | Eastward platform velocity | ve | cm/s |
| APNSGP01 | Northward platform velocity | vn | cm/s |
| DBINAA01 | Bin depth | metres | bindepth |
| DSRNGR01 | Distance Run | distrun | km |
| ASAMAP01 | Signal return amplitude from beam 1 | decibels | intense1 |
| ASAMAP02 | Signal return amplitude from beam 2 | decibels | intense2 |
| ASAMAP03 | Signal return amplitude from beam 3 | decibels | intense3 |
| ASAMAP04 | Signal return amplitude from beam 4 | decibels | intense4 |
| LCEWAS01 | Eastward current velocity (Eulerian) | cm/s | absve |
| LCNSAS01 | Northward current velocity (Eulerian) | cm/s | absvn |
| LERRAS01 | Current velocity error | cm/s | velerr |
| LREWAS01 | Relative eastward current velocity | cm/s | evelcal |
| LRNSAS01 | Relative northward current velocity | cm/s | nvelcal |
| LRZAAS01 | Upward current velocity | cm/s | velvert |
| PCGDAP01 | Percentage good return signal | % | good |
Screening and Data quality
The data have been visually screened for obvious problems using the BODC EDSERPLO software. A number of files (SUR267AT through to SUR267AX, or IPSNO 17200 through to 17800) were found to have no latitute or longitude information at all. The data originator was contacted and advised us to extract positional data from the underway data and merge on time. This has been done for all the data files to ensure consistency for the 75kHz dataset.
Project Information
Marine Productivity programme (MarProd)
The Marine Productivity programme (MarProd) was a Thematic Programme of the Natural Environment Research Council. It was funded for a period of five years starting in 2000. Its main goal was "to develop coupled modelling and observation systems for the pelagic ecosystem, with emphasis on physical factors affecting zooplankton dynamics" with the following specific objectives:
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To identify the dominant spatial and temporal scales of physical parameters and zooplankton population dynamics, by observation, modelling and retrospective analysis
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To parameterise the critical processes governing zooplankton dynamics by observations and experiments
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To construct and validate spatially explicit models of zooplankton and their food and predators, capable of resolving short term changes in population structure
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To provide data for model validation by developing and applying new interdisciplinary techniques to a wide spectrum of biological and physical parameters
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To develop a database and information system for historic and new data and models.
The programme was composed of two phases: Phase 1 projects (2000-2002) focused on the use of historical datasets and existing biological models, complemented by laboratory experiments and remote-sensing analyses to gain a better understanding of the dynamics of zooplankton populations in shelf seas. The main, field-based Phase 2 of the programme (2001-2005) focused on the open ocean. The fieldwork phase took place between November 2001 and December 2002 and consisted of four surveys in the northern North Atlantic in early winter 2001 and 2002, and in spring and summer 2002.
MarProd was a major UK contribution to the international Global Ocean Ecosystem Dynamics project (GLOBEC).
Data Activity or Cruise Information
Cruise
| Cruise Name | D267 |
| Departure Date | 2002-11-06 |
| Arrival Date | 2002-12-19 |
| Principal Scientist(s) | John T Allen (Southampton Oceanography Centre), Steven J Hay (Fisheries Research Services Aberdeen Marine Laboratory) |
| 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 |
