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Metadata Report for BODC Series Reference Number 2086578


Metadata Summary

Data Description

Data Category Water sample data
Instrument Type
NameCategories
General Oceanics GO-FLO water sampler  discrete water samplers
Instrument Mounting lowered unmanned submersible
Originating Country United Kingdom
Originator Prof Geoff Millward
Originating Organization Polytechnic South West Institute of Marine Studies (now University of Plymouth, School of Geography, Earth and Environmental Sciences)
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) North Sea Project 1987-1992
 

Data Identifiers

Originator's Identifier CH61_CTD_TMXX_27:2780
BODC Series Reference 2086578
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1989-09-24 22:07
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval -
 

Spatial Co-ordinates

Latitude 53.91789 N ( 53° 55.1' N )
Longitude 4.83236 E ( 4° 49.9' E )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth 11.6 m
Maximum Sensor or Sampling Depth 11.6 m
Minimum Sensor or Sampling Height 28.5 m
Maximum Sensor or Sampling Height 28.5 m
Sea Floor Depth 40.1 m
Sea Floor Depth Source PEVENT
Sensor or Sampling Distribution Unspecified -
Sensor or Sampling Depth Datum Unspecified -
Sea Floor Depth Datum Unspecified -
 

Parameters

BODC CODERankUnitsTitle
ADEPZZ011MetresDepth (spatial coordinate) relative to water surface in the water body
BOTTFLAG1Not applicableSampling process quality flag (BODC C22)
CDCNAAP21Milligrams per kilogramConcentration of cadmium {Cd CAS 7440-43-9} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and atomic absorption spectroscopy
CDXXAAP21Nanomoles per litreConcentration of cadmium {Cd CAS 7440-43-9} per unit volume of the water body [particulate >0.4/0.45um phase] by acid leaching of filter residue and atomic absorption spectroscopy
FECNAAP21PercentConcentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and atomic absorption spectroscopy
FEXXAAP21Nanomoles per litreConcentration of total iron {total_Fe CAS 7439-89-6} per unit volume of the water body [particulate >0.4/0.45um phase] by acid leaching of filter residue and atomic absorption spectroscopy
MNCNAAP21PercentConcentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and atomic absorption spectroscopy
MNXXAAP21Nanomoles per litreConcentration of total manganese {total_Mn CAS 7439-96-5} per unit volume of the water body [particulate >0.4/0.45um phase] by acid leaching of filter residue and atomic absorption spectroscopy
NICNAAP21Milligrams per kilogramConcentration of nickel {Ni CAS 7440-02-0} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and atomic absorption spectroscopy
NIXXAAP21Nanomoles per litreConcentration of nickel {Ni CAS 7440-02-0} per unit volume of the water body [particulate >0.4/0.45um phase] by acid leaching of filter residue and atomic absorption spectroscopy
PBCNAAP21Milligrams per kilogramConcentration of lead {Pb CAS 7439-92-1} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and atomic absorption spectroscopy
PBXXAAP21Nanomoles per litreConcentration of lead {Pb CAS 7439-92-1} per unit volume of the water body [particulate >0.4/0.45um phase] by acid leaching of filter residue and atomic absorption spectroscopy
SAMPRFNM1DimensionlessSample reference number
ZNCNAAP21Milligrams per kilogramConcentration of zinc {Zn CAS 7440-66-6} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and atomic absorption spectroscopy
ZNXXAAP21Nanomoles per litreConcentration of zinc {Zn CAS 7440-66-6} per unit volume of the water body [particulate >0.4/0.45um phase] by acid leaching of filter residue and atomic absorption spectroscopy

Definition of BOTTFLAG

BOTTFLAGDefinition
0The sampling event occurred without any incident being reported to BODC.
1The filter in an in-situ sampling pump physically ruptured during sample resulting in an unquantifiable loss of sampled material.
2Analytical 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.
3The 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.
4During 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.
5Water was reported to be escaping from the bottle as the rosette was being recovered.
6The bottle seals were observed to be incorrectly seated and the bottle was only part full of water on recovery.
7Either 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).
8There is reason to doubt the accuracy of the sampling depth associated with the sample.
9The bottle air vent had not been closed prior to deployment giving rise to a risk of sample contamination through leakage.

Definition of Rank

  • Rank 1 is a one-dimensional parameter
  • Rank 2 is a two-dimensional parameter
  • Rank 0 is a one-dimensional parameter describing the second dimension of a two-dimensional parameter (e.g. bin depths for moored ADCP data)

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
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
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
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) 1989-09-24
End Date (yyyy-mm-dd) 1989-09-24
Organization Undertaking ActivityPlymouth Marine Laboratory
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierCH61_CTD_2780
Platform Categorylowered unmanned submersible

BODC Sample Metadata Report for CH61_CTD_2780

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
319134   10.00       37.20   37.50   34.10 Niskin bottle No problem reported    
319148   10.00       14.30   15.00   11.60 General Oceanics GO-FLO water sampler No problem reported    
319165   10.00        4.10    4.30    1.20 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 CH61
Departure Date 1989-09-21
Arrival Date 1989-10-03
Principal Scientist(s)Ian Joint (Plymouth Marine Laboratory)
Ship RRS Challenger

Complete Cruise Metadata Report is available here


Fixed Station Information

Fixed Station Information

Station NameNSP CTD Site BH
CategoryOffshore location
Latitude53° 55.09' N
Longitude4° 49.95' E
Water depth below MSL

North Sea Project CTD Site BH

Site BH was one of 123 North Sea Project CTD fixed stations.

Casts were performed by 16 cruises between 08/08/1988 and 28/09/1990, the measurements collected lie within a box bounded by co-ordinates 53.91431°N, 4.82181°E at the southwest corner and 53.922°N, 4.84305°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: CH61_CTD_2780

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 IdentifierData CategoryStart date/timeStart positionCruise
1241146Water sample data1989-09-24 22:07:0053.91789 N, 4.83236 ERRS Challenger CH61
1700816Water sample data1989-09-24 22:07:0053.91789 N, 4.83236 ERRS Challenger CH61
1854981Water sample data1989-09-24 22:07:0053.91789 N, 4.83236 ERRS Challenger CH61
2087477Water sample data1989-09-24 22:07:2853.91789 N, 4.83236 ERRS Challenger CH61

Appendix 2: NSP CTD Site BH

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 IdentifierData CategoryStart date/timeStart positionCruise
769262CTD or STD cast1988-08-08 10:35:0053.91867 N, 4.8275 ERRS Challenger CH33
783360CTD or STD cast1988-09-07 09:14:0053.915 N, 4.83217 ERRS Challenger CH35
784572CTD or STD cast1988-10-06 03:06:0053.91433 N, 4.84217 ERRS Challenger CH37
821603CTD or STD cast1988-11-05 06:51:0053.91817 N, 4.82867 ERRS Challenger CH39
785551CTD or STD cast1988-12-11 15:40:0053.919 N, 4.82183 ERRS Challenger CH41
786610CTD or STD cast1989-01-07 23:10:0053.91567 N, 4.83167 ERRS Challenger CH43
791384CTD or STD cast1989-02-01 13:17:0053.91683 N, 4.83433 ERRS Challenger CH45
1859739Water sample data1989-02-01 13:20:0053.91689 N, 4.83426 ERRS Challenger CH45
792603CTD or STD cast1989-03-03 10:13:0053.91817 N, 4.843 ERRS Challenger CH47
1857432Water sample data1989-03-03 10:17:0053.91821 N, 4.84305 ERRS Challenger CH47
794124CTD or STD cast1989-04-02 18:46:0053.922 N, 4.83933 ERRS Challenger CH49
1858804Water sample data1989-04-02 18:49:0053.922 N, 4.83931 ERRS Challenger CH49
796352CTD or STD cast1989-05-30 08:04:0053.91433 N, 4.83033 ERRS Challenger CH53
1863394Water sample data1989-05-30 08:09:0053.91434 N, 4.83036 ERRS Challenger CH53
797656CTD or STD cast1989-06-27 23:28:0053.9185 N, 4.83383 ERRS Challenger CH55
1656647Water sample data1989-06-27 23:32:0053.91846 N, 4.83385 ERRS Challenger CH55
1865862Water sample data1989-06-27 23:32:0053.91846 N, 4.83385 ERRS Challenger CH55
799036CTD or STD cast1989-07-28 08:12:0053.916 N, 4.8315 ERRS Challenger CH57
1245891Water sample data1989-07-28 08:16:0053.91605 N, 4.83158 ERRS Challenger CH57
1709361Water sample data1989-07-28 08:16:0053.91605 N, 4.83158 ERRS Challenger CH57
1864686Water sample data1989-07-28 08:16:0053.91605 N, 4.83158 ERRS Challenger CH57
801546CTD or STD cast1989-08-27 02:22:0053.92 N, 4.83467 ERRS Challenger CH59
1856244Water sample data1989-08-27 02:26:0053.91992 N, 4.83459 ERRS Challenger CH59
800205CTD or STD cast1989-09-24 22:03:0053.91783 N, 4.83233 ERRS Challenger CH61
1854981Water sample data1989-09-24 22:07:0053.91789 N, 4.83236 ERRS Challenger CH61
2087477Water sample data1989-09-24 22:07:2853.91789 N, 4.83236 ERRS Challenger CH61
802887CTD or STD cast1990-05-24 21:32:0053.9175 N, 4.836 ERRS Challenger CH66A
804870CTD or STD cast1990-09-28 01:30:0053.91517 N, 4.83583 ERRS Challenger CH72A