Metadata Report for BODC Series Reference Number 529940
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
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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
Public domain 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.
The recommended acknowledgment is
"This study uses data from the data source/organisation/programme, provided by the British Oceanographic Data Centre and funded by the funding body."
Narrative Documents
RV Thalassa TH1099 UOR Deployments
UOR data were collected on a series of tows between stations on the OMEX99 Thalassa cruise as follows:
Start | End | |||||
---|---|---|---|---|---|---|
Tow | Time | Latitude | Longitude | Time | Latitude | Longitude |
Tow_S | 14/10/99 18:01 | 42.1500 | -10.0000 | 15/10/99 05:19 | 42.1500 | -8.9501 |
Tow5 | 16/10/99 08:31 | 42.1488 | -9.1393 | 16/10/99 14:21 | 42.6630 | -9.9938 |
Tow61 | 17/10/99 22:10 | 42.6667 | -9.1792 | 18/10/99 02:28 | 42.6661 | -9.9977 |
Tow62 | 18/10/99 02:28 | 42.6661 | -9.9976 | 18/10/99 06:44 | 42.6681 | -9.2203 |
Tow7 | 18/10/99 08:45 | 42.6771 | -9.2221 | 18/10/99 13:37 | 42.9978 | -10.0094 |
Tow81 | 18/10/99 22:45 | 43.0027 | -9.5200 | 19/10/99 01:35 | 43.0004 | -10.0079 |
Tow82 | 19/10/99 01:35 | 43.0005 | -10.0079 | 19/10/99 04:21 | 42.9962 | -9.5095 |
UOR Data Processing
Instrumentation
The towed instrument was a standard Chelsea Instruments fish equipped with an Aquapak CTD, an Aquatracka fluorometer and a PAR sensor.
Data Processing
The data were supplied to BODC as ASCII files with pressure, temperature, salinity and chlorophyll calibrated into engineering units together with the PAR sensor output as a voltage.
The standard manufacturer's calibrations had been applied from a calibration file dated October 1996. Navigation had been added by linear interpolation between the positions at the start and the end of each tow.
The data were converted into BODC internal format (PXF) and screened on a graphics workstation. Spikes in the data were flagged as suspect. In addition, 'B' and 'E' flags (beginning and end) were applied to the pressure channel to delimit the individual up and down cast profiles.
No attempt has been made to intercalibrate the UOR data with sample data or with data from other instruments. The absolute accuracy of the data is therefore unknown. No calibration to convert light meter voltage into engineering units was available.
Project Information
Ocean Margin EXchange (OMEX) II - II
Introduction
OMEX was a European multidisciplinary oceanographic research project that studied and quantified the exchange processes of carbon and associated elements between the continental shelf of western Europe and the open Atlantic Ocean. The project ran in two phases known as OMEX I (1993-1996) and OMEX II - II (1997-2000), with a bridging phase OMEX II - I (1996-1997). The project was supported by the European Union under the second and third phases of its MArine Science and Technology Programme (MAST) through contracts MAS2-CT93-0069 and MAS3-CT97-0076. It was led by Professor Roland Wollast from Université Libre de Bruxelles, Belgium and involved more than 100 scientists from 10 European countries.
Scientific Objectives
The aim of the Ocean Margin EXchange (OMEX) project was to gain a better understanding of the physical, chemical and biological processes occurring at the ocean margins in order to quantify fluxes of energy and matter (carbon, nutrients and other trace elements) across this boundary. The research culminated in the development of quantitative budgets for the areas studied using an approach based on both field measurements and modeling.
OMEX II - II (1997-2000)
The second phase of OMEX concentrated exclusively on the Iberian Margin, although RV Belgica did make some measurements on La Chapelle Bank whilst on passage to Zeebrugge. This is a narrow-shelf environment, which contrasts sharply with the broad shelf adjacent to the Goban Spur. This phase of the project was also strongly multidisciplinary in approach, covering physics, chemistry, biology and geology.
There were a total of 33 OMEX II - II research cruises, plus 23 CPR tows, most of which were instrumented. Some of these cruises took place before the official project start date of June 1997.
Data Availability
Field data collected during OMEX II - II have been published by BODC as a CD-ROM product, entitled:
- OMEX II Project Data Set (three discs)
Further descriptions of this product and order forms may be found on the BODC web site.
The data are also held in BODC's databases and subsets may be obtained by request from BODC.
Data Activity or Cruise Information
Cruise
Cruise Name | TH1099 |
Departure Date | 1999-10-13 |
Arrival Date | 1999-10-20 |
Principal Scientist(s) | Manuel Varela (Spanish Institute of Oceanography, La Coruna Oceanographic Centre) |
Ship | Thalassa |
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 |