Metadata Report for BODC Series Reference Number 2096259
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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Definition of BOTTFLAG | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
BOTTFLAG | Definition |
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0 | The sampling event occurred without any incident being reported to BODC. |
1 | The filter in an in-situ sampling pump physically ruptured during sample resulting in an unquantifiable loss of sampled material. |
2 | Analytical evidence (e.g. surface water salinity measured on a sample collected at depth) indicates that the water sample has been contaminated by water from depths other than the depths of sampling. |
3 | The feedback indicator on the deck unit reported that the bottle closure command had failed. General Oceanics deck units used on NERC vessels in the 80s and 90s were renowned for reporting misfires when the bottle had been closed. This flag is also suitable for when a trigger command is mistakenly sent to a bottle that has previously been fired. |
4 | During the sampling deployment the bottle was fired in an order other than incrementing rosette position. Indicative of the potential for errors in the assignment of bottle firing depth, especially with General Oceanics rosettes. |
5 | Water was reported to be escaping from the bottle as the rosette was being recovered. |
6 | The bottle seals were observed to be incorrectly seated and the bottle was only part full of water on recovery. |
7 | Either the bottle was found to contain no sample on recovery or there was no bottle fitted to the rosette position fired (but SBE35 record may exist). |
8 | There is reason to doubt the accuracy of the sampling depth associated with the sample. |
9 | The bottle air vent had not been closed prior to deployment giving rise to a risk of sample contamination through leakage. |
Definition of Rank |
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Problem Reports
No Problem Report Found in the Database
Data Access Policy
Open 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.
If the Information Provider does not provide a specific attribution statement, or if you are using Information from several Information Providers and multiple attributions are not practical in your product or application, you may consider using the following:
"Contains public sector information licensed under the Open Government Licence v1.0."
Narrative Documents
GO-FLO Bottle
A water sampling bottle featuring close-open-close operation. The bottle opens automatically at approximately 10 metres and flushes until closed. Sampling with these bottles avoids contamination at the surface, internal spring contamination, loss of sample on deck and exchange of water from different depths.
There are several sizes available, from 1.7 to 100 litres and are made of PVC with a depth rating of up to 500 m. These bottles can be attached to a rosette or placed on a cable at selected positions.
Particulate Trace Metals as part of the North Sea Project
Document History
Converted from CDROM documentation
Sampling strategy and methodology
Samples for trace metal analysis were collected, using clean techniques, by 10 litre Teflon-lined Go-Flo bottles (modified to reduce the contamination potential for trace metals) fitted to the CTD rosette sampler. Initial sample handling was carried out on board using the facilities of the RVS clean chemistry container (Morley et al., 1988).
Each sea water sample was pressure-filtered (ca. 0.7 bar) in-line through a 0.4 um Nuclepore membrane filter. For a substantial proportion of the samples large volume filtration systems were used to obtain sufficient suspended particulate material for trace metal analysis. Membranes were stored frozen until analysis.
The filtrates were used for dissolved trace metal determinations using compatible analytical procedures. This greatly enhances the value of the data set.
Suspended matter concentrations were determined on the same sample as the chemical analysis.
Analytical techniques
The samples were leached using 1M HCl at room temperature for 8 hours under clean conditions. The leachate was decanted into volumetric flasks and made up to volume. Metals were determined by either flame AAS or GFAAS.
Unit Conversions
The data for cruises CH33, CH42, CH43, CH46, CH50, CH51 and CH61 were supplied to BODC in units of ug/g dry weight or per cent in the case of aluminium. The metals supplied in ug/g were converted to nanomoles per litre of water by multiplying by the suspended matter concentration (included with the data) and dividing by the atomic weight (Cd 112.4; Co 58.933; Cr 51.996; Cu 63.54; Fe 55.847; Mn 54.938; Ni 58.69; Pb 207.19; Zn 65.37).
Aluminium was converted to micromoles per litre of water by multiplying by 10 times the suspended matter concentration and dividing by the atomic weight (26.982).
Data for CH44, CH52, CH60 and CH72C were supplied in molar form but also include the suspended matter concentration and therefore the metal concentrations in the particulate phase may be calculated if required.
References
Morley, N.H., P.J. Statham and C. Fay (1988) Design and use of a clean shipboard handling system for sea water samples. In: Advances in Underwater Technology, Ocean Science and Offshore Engineering, Volume 16 (Oceanology '88), Graham and Trotman, London, 283-290.
Project Information
North Sea Project
The North Sea Project (NSP) was the first Marine Sciences Community Research project of the Natural Environment Research Council (NERC). It evolved from a NERC review of shelf sea research, which identified the need for a concerted multidisciplinary study of circulation, transport and production.
The ultimate aim of the NERC North Sea Project was the development of a suite of prognostic water quality models to aid management of the North Sea. To progress towards water quality models, three intermediate objectives were pursued in parallel:
- Production of a 3-D transport model for any conservative passive constituent, incorporating improved representations of the necessary physics - hydrodynamics and dispersion;
- Identifying and quantifying non-conservative processes - sources and sinks determining the cycling and fate of individual constituents;
- Defining a complete seasonal cycle as a database for all the observational studies needed to formulate, drive and test models.
Proudman Oceanographic Laboratory hosted the project, which involved over 200 scientists and support staff from NERC and other Government funded laboratories, as well as seven universities and polytechnics.
The project ran from 1987 to 1992, with marine field data collection between April 1988 and October 1989. One shakedown (CH28) and fifteen survey cruises (Table 1), each lasting 12 days and following the same track, were repeated monthly. The track selected covered the summer-stratified waters of the north and the homogeneous waters in the Southern Bight in about equal lengths together with their separating frontal band from Flamborough head to Dogger Bank, the Friesian Islands and the German Bight. Mooring stations were maintained at six sites for the duration of the project.
Table 1: Details of NSP Survey Cruises on RRS Challenger | |
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Cruise No. | Date |
CH28 | 29/04/88 - 15/05/88 |
CH33 | 04/08/88 - 16/08/88 |
CH35 | 03/09/88 - 15/09/88 |
CH37 | 02/10/88 - 14/10/88 |
CH39 | 01/11/88 - 13/11/88 |
CH41 | 01/12/88 - 13/12/88 |
CH43 | 30/12/88 - 12/01/89 |
CH45 | 28/01/89 - 10/02/89 |
CH47 | 27/02/89 - 12/03/89 |
CH49 | 29/03/89 - 10/04/89 |
CH51 | 27/04/89 - 09/05/89 |
CH53 | 26/05/89 - 07/06/89 |
CH55 | 24/06/89 - 07/07/89 |
CH57 | 24/07/89 - 06/08/89 |
CH59 | 23/08/89 - 04/09/89 |
CH61 | 21/09/89 - 03/10/89 |
Alternating with the survey cruises were process study cruises (Table 2), which investigated some particular aspect of the science of the North Sea. These included fronts (nearshore, circulation and mixing), sandwaves and sandbanks, plumes (Humber, Wash, Thames and Rhine), resuspension, air-sea exchange, primary productivity and blooms/chemistry.
Table 2: Details of NSP Process cruises on RRS Challenger | ||
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Cruise No. | Date | Process |
CH34 | 18/08/88 - 01/09/88 | Fronts - nearshore |
CH36 | 16/09/88 - 30/09/88 | Fronts - mixing |
CH56 | 08/07/89 - 22/07/89 | Fronts - circulation |
CH58 | 07/08/89 - 21/08/89 | Fronts - mixing |
CH38 | 24/10/88 - 31/10/88 | Sandwaves |
CH40 | 15/11/88 - 29/11/88 | Sandbanks |
CH42 | 15/12/88 - 29/12/88 | Plumes/Sandbanks |
CH46 | 12/02/89 - 26/02/89 | Plumes/Sandwaves |
CH44 | 13/01/89 - 27/01/89 | Resuspension |
CH52 | 11/05/89 - 24/05/89 | Resuspension |
CH60 | 06/09/89 - 19/09/89 | Resuspension |
CH48 | 13/03/89 - 27/03/89 | Air/sea exchanges |
CH62 | 05/10/89 - 19/10/89 | Air/sea exchanges |
CH50 | 12/04/89 - 25/04/89 | Blooms/chemistry |
CH54 | 09/06/89 - 22/06/89 | Production |
In addition to the main data collection period, a series of cruises took place between October 1989 and October 1990 that followed up work done on previous cruises (Table 3). Process studies relating to blooms, plumes (Humber, Wash and Rhine), sandwaves and the flux of contaminants through the Dover Strait were carried out as well as two `survey' cruises.
Table 3: Details of NSP `Follow up' cruises on RRS Challenger | ||
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Cruise No. | Date | Process |
CH62A | 23/10/89 - 03/11/89 | Blooms |
CH64 | 03/04/90 - 03/05/90 | Blooms |
CH65 | 06/05/90 - 17/05/90 | Humber plume |
CH66A | 20/05/90 - 31/05/90 | Survey |
CH66B | 03/06/90 - 18/06/90 | Contaminants through Dover Strait |
CH69 | 26/07/90 - 07/08/90 | Resuspension/Plumes |
CH72A | 20/09/90 - 02/10/90 | Survey |
CH72B | 04/10/90 - 06/10/90 | Sandwaves/STABLE |
CH72C | 06/10/90 - 19/10/90 | Rhine plume |
The data collected during the observational phase of the North Sea Project comprised one of the most detailed sets of observations ever undertaken in any shallow shelf sea at that time.
Data Activity or Cruise Information
Data Activity
Start Date (yyyy-mm-dd) | 1989-05-02 |
End Date (yyyy-mm-dd) | 1989-05-02 |
Organization Undertaking Activity | Plymouth Marine Laboratory |
Country of Organization | United Kingdom |
Originator's Data Activity Identifier | CH51_CTD_1804 |
Platform Category | lowered unmanned submersible |
BODC Sample Metadata Report for CH51_CTD_1804
Sample reference number | Nominal collection volume(l) | Bottle rosette position | Bottle firing sequence number | Minimum pressure sampled (dbar) | Maximum pressure sampled (dbar) | Depth of sampling point (m) | Bottle type | Sample quality flag | Bottle reference | Comments |
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286448 | 10.00 | 31.00 | 31.40 | 28.00 | General Oceanics GO-FLO water sampler | No problem reported | ||||
286451 | 10.00 | 19.10 | 19.30 | 16.10 | Niskin bottle | No problem reported | ||||
286465 | 10.00 | 12.00 | 12.50 | 9.20 | General Oceanics GO-FLO water sampler | No problem reported | ||||
286479 | 10.00 | 3.80 | 4.10 | 1.00 | Niskin bottle | No problem reported |
Please note:the supplied parameters may not have been sampled from all the bottle firings described in the table above. Cross-match the Sample Reference Number above against the SAMPRFNM value in the data file to identify the relevant metadata.
Related Data Activity activities are detailed in Appendix 1
Cruise
Cruise Name | CH51 |
Departure Date | 1989-04-27 |
Arrival Date | 1989-05-09 |
Principal Scientist(s) | Alan W Morris (Plymouth Marine Laboratory) |
Ship | RRS Challenger |
Complete Cruise Metadata Report is available here
Fixed Station Information
Fixed Station Information
Station Name | NSP CTD Site BW |
Category | Offshore location |
Latitude | 54° 5.97' N |
Longitude | 7° 0.07' E |
Water depth below MSL |
North Sea Project CTD Site BW
Site BW was one of 123 North Sea Project CTD fixed stations.
Casts were performed by 15 cruises between 03/05/1988 and 26/05/1990, the measurements collected lie within a box bounded by co-ordinates 54.09682°N, 6.99091°E at the southwest corner and 54.1022°N, 7.01147°E at the northeast corner.
Related Fixed Station activities are detailed in Appendix 2
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 |
Appendix 1: CH51_CTD_1804
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.
Series Identifier | Data Category | Start date/time | Start position | Cruise |
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2082307 | Water sample data | 1989-05-02 12:55:46 | 54.09819 N, 6.99319 E | RRS Challenger CH51 |
2083452 | Water sample data | 1989-05-02 12:55:46 | 54.09819 N, 6.99319 E | RRS Challenger CH51 |
2097066 | Water sample data | 1989-05-02 12:55:46 | 54.09819 N, 6.99319 E | RRS Challenger CH51 |
1244783 | Water sample data | 1989-05-02 12:56:00 | 54.09819 N, 6.99319 E | RRS Challenger CH51 |
1705790 | Water sample data | 1989-05-02 12:56:00 | 54.09819 N, 6.99319 E | RRS Challenger CH51 |
1860998 | Water sample data | 1989-05-02 12:56:00 | 54.09819 N, 6.99319 E | RRS Challenger CH51 |
Appendix 2: NSP CTD Site BW
Related series for this Fixed Station 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.
Series Identifier | Data Category | Start date/time | Start position | Cruise |
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781341 | CTD or STD cast | 1988-05-11 07:10:00 | 54.64933 N, 1.047 E | RRS Challenger CH28 |
769422 | CTD or STD cast | 1988-08-09 18:54:00 | 54.09817 N, 7.00867 E | RRS Challenger CH33 |
783520 | CTD or STD cast | 1988-09-08 13:40:00 | 54.09917 N, 6.99833 E | RRS Challenger CH35 |
821768 | CTD or STD cast | 1988-11-06 06:38:00 | 54.10217 N, 7.00383 E | RRS Challenger CH39 |
786738 | CTD or STD cast | 1989-01-08 20:20:00 | 54.10117 N, 7.00667 E | RRS Challenger CH43 |
791520 | CTD or STD cast | 1989-02-02 13:54:00 | 54.09683 N, 7.00267 E | RRS Challenger CH45 |
1859881 | Water sample data | 1989-02-02 13:57:00 | 54.09682 N, 7.00272 E | RRS Challenger CH45 |
792781 | CTD or STD cast | 1989-03-04 16:27:00 | 54.09967 N, 7.00183 E | RRS Challenger CH47 |
794265 | CTD or STD cast | 1989-04-04 02:48:00 | 54.10017 N, 6.9975 E | RRS Challenger CH49 |
1858945 | Water sample data | 1989-04-04 02:52:00 | 54.10013 N, 6.99754 E | RRS Challenger CH49 |
795140 | CTD or STD cast | 1989-05-02 12:48:00 | 54.09817 N, 6.99317 E | RRS Challenger CH51 |
2082307 | Water sample data | 1989-05-02 12:55:46 | 54.09819 N, 6.99319 E | RRS Challenger CH51 |
2083452 | Water sample data | 1989-05-02 12:55:46 | 54.09819 N, 6.99319 E | RRS Challenger CH51 |
2097066 | Water sample data | 1989-05-02 12:55:46 | 54.09819 N, 6.99319 E | RRS Challenger CH51 |
1860998 | Water sample data | 1989-05-02 12:56:00 | 54.09819 N, 6.99319 E | RRS Challenger CH51 |
796500 | CTD or STD cast | 1989-05-31 11:05:00 | 54.10183 N, 6.99083 E | RRS Challenger CH53 |
1863529 | Water sample data | 1989-05-31 11:08:00 | 54.10175 N, 6.99091 E | RRS Challenger CH53 |
797816 | CTD or STD cast | 1989-06-29 07:02:00 | 54.10117 N, 6.99833 E | RRS Challenger CH55 |
1656739 | Water sample data | 1989-06-29 07:05:00 | 54.10123 N, 6.99835 E | RRS Challenger CH55 |
1866017 | Water sample data | 1989-06-29 07:05:00 | 54.10123 N, 6.99835 E | RRS Challenger CH55 |
799208 | CTD or STD cast | 1989-07-29 13:19:00 | 54.10083 N, 6.9975 E | RRS Challenger CH57 |
1246058 | Water sample data | 1989-07-29 13:21:00 | 54.10081 N, 6.99748 E | RRS Challenger CH57 |
1709521 | Water sample data | 1989-07-29 13:21:00 | 54.10081 N, 6.99748 E | RRS Challenger CH57 |
1864846 | Water sample data | 1989-07-29 13:21:00 | 54.10081 N, 6.99748 E | RRS Challenger CH57 |
801699 | CTD or STD cast | 1989-08-28 08:34:00 | 54.1 N, 7.00267 E | RRS Challenger CH59 |
1856397 | Water sample data | 1989-08-28 08:36:00 | 54.10002 N, 7.00266 E | RRS Challenger CH59 |
800346 | CTD or STD cast | 1989-09-26 22:28:00 | 54.09867 N, 7.00083 E | RRS Challenger CH61 |
1855124 | Water sample data | 1989-09-26 22:32:00 | 54.09868 N, 7.00091 E | RRS Challenger CH61 |
2086695 | Water sample data | 1989-09-26 22:32:20 | 54.09868 N, 7.00091 E | RRS Challenger CH61 |
2087613 | Water sample data | 1989-09-26 22:32:20 | 54.09868 N, 7.00091 E | RRS Challenger CH61 |
803055 | CTD or STD cast | 1990-05-26 02:06:00 | 54.09967 N, 6.995 E | RRS Challenger CH66A |