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Metadata Report for BODC Series Reference Number 2101116

Metadata Summary

Data Description

Data Category Water sample data
Instrument Type
Niskin bottle  discrete water samplers
Lachat QuikChem 8500 flow injection analysis system  flow injection analysers
Instrument Mounting lowered unmanned submersible
Originating Country United Kingdom
Originator Mr Tim Brand
Originating Organization Scottish Association for Marine Science
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) Oceans 2025 Theme 10 SO4

Data Identifiers

Originator's Identifier JC086_CTD_NUTS_304:C008
BODC Series Reference 2101116

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2013-05-10 07:45
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval -

Spatial Co-ordinates

Latitude 63.45278 N ( 63° 27.2' N )
Longitude 20.25583 W ( 20° 15.3' W )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth 5.5 m
Maximum Sensor or Sampling Depth 140.9 m
Minimum Sensor or Sampling Height 67.1 m
Maximum Sensor or Sampling Height 202.5 m
Sea Floor Depth 208.0 m
Sea Floor Depth Source SCILOG
Sensor or Sampling Distribution Unspecified -
Sensor or Sampling Depth Datum Unspecified -
Sea Floor Depth Datum Unspecified -


BODC CODERankUnitsTitle
ADEPZZ011MetresDepth (spatial coordinate) relative to water surface in the water body
BOTTFLAG1Not applicableSampling process quality flag (BODC C22)
FIRSEQID1DimensionlessBottle firing sequence number
NTRZAATX1Micromoles per litreConcentration of nitrate+nitrite {NO3+NO2} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis
PHOSAATX1Micromoles per litreConcentration of phosphate {PO43- CAS 14265-44-2} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis
ROSPOSID1DimensionlessBottle rosette position identifier
SAMPRFNM1DimensionlessSample reference number
SLCAAATX1Micromoles per litreConcentration of silicate {SiO44- CAS 17181-37-2} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis

Definition of BOTTFLAG

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

Lachat QuikChem 8500 flow injection analyzer (FIA) and Ion Chromatography (IC) system

The Lachat QuikChem 8500 can operate FIA and IC simultaneously and independently on the same instrument platform. FIA and IC are complementary analytical techniques that are commonly used in the same laboratory.

Instrument includes - sampler, dilutor, sampling pump, electronics unit, and data station.

Flow injection analysis is ideally suited for processing relatively large numbers of samples. Ion Chromatography adds the power to profile samples for a class of ionic species.

FIA Productivity Characteristics

  • Fast Startup - ~5 minutes
  • Rapid Analysis - 20 to 60 seconds is typical
  • High Sample Throughput - 60 to 120 samples per hour is typical
  • Broad Working Range - Parts per trillion to percents
  • Complete Baseline Resolution - No carryover between samples
  • Wide Dynamic Range - 2 to 3 decades is typical
  • Fast Shutdown - ~5 minutes
  • Rapid Method Changeover - ~10 minutes

New FIA Features

  • Run up to 5 channels for high productivity analysis or dedicated operation.
  • New 2-cm flow cell methods allow more signal for detection at lower levels.
  • Run Omnion 3.0 software on Windows XP, Vista, or Windows 7 operating systems.
  • Interface Omnion software in multiple languages - including Spanish, German, French, Portuguese, and Italian.

For more information about this model see the manufactures data sheet - Lachat QuikChem 8500.

Niskin Bottle

The Niskin bottle is a device used by oceanographers to collect subsurface seawater samples. It is a plastic bottle with caps and rubber seals at each end and is deployed with the caps held open, allowing free-flushing of the bottle as it moves through the water column.

Standard Niskin

The standard version of the bottle includes a plastic-coated metal spring or elastic cord running through the interior of the bottle that joins the two caps, and the caps are held open against the spring by plastic lanyards. When the bottle reaches the desired depth the lanyards are released by a pressure-actuated switch, command signal or messenger weight and the caps are forced shut and sealed, trapping the seawater sample.

Lever Action Niskin

The Lever Action Niskin Bottle differs from the standard version, in that the caps are held open during deployment by externally mounted stainless steel springs rather than an internal spring or cord. Lever Action Niskins are recommended for applications where a completely clear sample chamber is critical or for use in deep cold water.

Clean Sampling

A modified version of the standard Niskin bottle has been developed for clean sampling. This is teflon-coated and uses a latex cord to close the caps rather than a metal spring. The clean version of the Levered Action Niskin bottle is also teflon-coated and uses epoxy covered springs in place of the stainless steel springs. These bottles are specifically designed to minimise metal contamination when sampling trace metals.


Bottles may be deployed singly clamped to a wire or in groups of up to 48 on a rosette. Standard bottles and Lever Action bottles have a capacity between 1.7 and 30 L. Reversing thermometers may be attached to a spring-loaded disk that rotates through 180° on bottle closure.

JC086 discrete dissolved inorganic nutrients sampling document

Originator's protocol for data acquisition and analysis

The following information contains extracts from the JC086 cruise report.

Water samples were drawn from the CTD rosette bottles deployed during the cruise for ammonia, phosphate, silicate, nitrate and nitrite, with the majority of the sampling effort concentrated in areas of the water column corresponding with changes in water mass. Samples were also drawn from the ships non-toxic water supply.

SAMS Analysis

Samples were collected in 125 ml acid cleaned polythene bottles directly from CTD spigots without the use of a tube. Samples were stored in a fridge prior to analysis. The analysis was carried out within 24 hours of sample collection with a Lachat Quick Chem 8500 flow injection autoanalyser using the manufacturer's recommended methods.

Samples were measured in triplicate to identify instrument precision. A stock mixed standard was prepared in deionized water with subsequent dilutions made in OSIL Low Nutrient Sea Water using the instrument auto-dilutor facility. Five standard concentrations and a blank were run in all cases and new standards were prepared every 48 hours. Using standards prepared in Low Nutrient Sea Water removes the need to do a separate salt correction. Three standard concentration ranges were prepared for the non-toxic and CTD samples depending on expected nutrient concentration.

NOC Analysis

Samples were taken in 30ml plastic vials which were filled up to 2/3 of the total volume to allow expansion of water. Samples were labelled and stored in the freezer until analysis. The analysis was carried out at NOCS using a Quattro nutrient analyzer system.

BODC data processing procedures

Data from SAMS were provided in Mstar format and the data from NOC in .CSV format. The data files were converted to Microsoft Excel format and loaded into BODC's ocean database under the ORACLE Relational Database Management System without modification. Data that were considered unrealistic were flagged suspect. Metadata collected from the various data files were favoured by BODC over the metadata recorded in the cruise report logs in the JC086 cruise report.

Content of data series

Originator's Parameter Unit Description BODC Parameter code BODC Unit Comments
CTD bottle and discrete underway phosphate µM Concentration of phosphate in the water column by colorimetric autoanalysis (unfiltered) PHOSAATX µM N/A
CTD bottle and discrete underway silicate µM Concentration of silicate in the water column by colorimetric autoanalysis (unfiltered) SLCAAATX µM N/A
CTD bottle and discrete underway nitrate and nitrite µM Concentration of nitrate and nitrite in the water column by colorimetric autoanalysis (unfiltered) NTRZAATX µM N/A

Data quality report

BODC applied flags to negative silicate values at CTD cast 59 bottle 13 and CTD cast 64 bottle 17.

No problems were reported and no significant issues encountered during BODC data banking procedures.

References cited

Griffiths C. R. et al., 2013. RRS James Cook Cruise JC086, 06 May 2013 - 26 May 2013. Govan to Govan, Scotland - the Extended Ellett Line. Scottish Association for Marine Science. (Scottish Marine Institute, Oban).

Available - Cruise JC086 Internal Report

Hartman, S., J. L. Menzel and Achterberg.E., 2014. Discrete Carbon Dioxide Data Obtained During the R/V James Cook EEL_2013_JC86 Cruise Along Extended Ellett Line. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tennessee. doi: 10.3334/CDIAC/OTG.CLIVAR_EEL_2013_JC86

The doi referenced was created prior to BODC receiving the data and is a subset of the dataset (only NOC nutrients).

Project Information

Oceans 2025 Theme 10, Sustained Observation Activity 4: The Extended Ellett Line

The Ellett Line (begun in 1975 and since 1996 the Extended Ellett Line from Scotland to Iceland) crosses important north Atlantic Meridional Overturning Circulation (MOC) components and thus provides an additional contribution to understanding the north Atlantic response to climate change. Sustained Observation Activity (SO) 4 will repeat this section annually collecting a wide variety of physical and biogeochemical measurements, and will, to enhance the time variable component, make use of Argo floats and gliders. SO 4 will be implemented by physical, biological and chemical scientists at the National Oceanography Centre, Southampton (NOCS) and the Scottish Association for Marine Science (SAMS).

SO 4 formally contributes to the Department for Environment, Food and Rural Affairs (DEFRA)-funded Marine Environmental Change Network (MECN). Established in 2002 to coordinate and promote the collection and utilisation of marine time-series and long-term data sets, the goal of the network is to use long-term marine environmental data from around the British Isles and Ireland to separate natural fluctuations from global, regional and local anthropogenic impacts.

The specific deliverables for SO 4 are:

  • A time series of the evolution of the hydrography of the northeast Atlantic, together with a more formal understanding of the causes of any changes observed
  • An archived data set available to the international community via the British Oceanographic Data Centre (BODC)
  • A platform for further scientific research

More detailed information on this Work Package is available at pages 15 - 16 of the official Oceans 2025 Theme 10 document: Oceans 2025 Theme 10


Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 2013-05-10
End Date (yyyy-mm-dd) 2013-05-10
Organization Undertaking ActivityScottish Association for Marine Science
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierJC086_CTD_C008
Platform Categorylowered unmanned submersible

BODC Sample Metadata Report for JC086_CTD_C008

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
943649   10.00 1 1  197.20  198.40  195.80 Niskin bottle No problem reported    
943652   10.00 2 2  197.30  197.80  195.60 Niskin bottle No problem reported    
943655   10.00 3 3  162.20  163.70  161.40 Niskin bottle No problem reported    
943658   10.00 4 4  162.20  163.00  160.90 Niskin bottle No problem reported    
943661   10.00 5 5  141.80  143.30  140.90 Niskin bottle No problem reported    
943664   10.00 6 6  142.00  143.20  141.10 Niskin bottle No problem reported    
943667   10.00 7 7  101.50  102.30  100.90 Niskin bottle No problem reported    
943670   10.00 8 8  101.70  102.00  100.80 Niskin bottle No problem reported    
943673   10.00 9 9   77.00   77.50   76.50 Niskin bottle No problem reported    
943676   10.00 10 10   76.50   77.70   76.50 Niskin bottle No problem reported    
943679   10.00 11 11   51.90   52.40   51.70 Niskin bottle No problem reported    
943682   10.00 12 12   51.80   52.90   51.90 Niskin bottle No problem reported    
943685   10.00 13 13   21.60   22.50   21.90 Niskin bottle No problem reported    
943688   10.00 14 14   21.30   22.60   21.70 Niskin bottle No problem reported    
943691   10.00 15 15   13.90   14.90   14.40 Niskin bottle No problem reported    
943694   10.00 16 16   14.10   14.90   14.20 Niskin bottle No problem reported    
943697   10.00 17 17    5.40    5.80    5.50 Niskin bottle No problem reported    
943700   10.00 18 18    5.30    5.80    5.50 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 Name JC086
Departure Date 2013-05-06
Arrival Date 2013-05-26
Principal Scientist(s)Colin R Griffiths (Scottish Association for Marine Science)
Ship RRS James Cook

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

Appendix 1: JC086_CTD_C008

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
2098033Water sample data2013-05-10 07:45:3063.45278 N, 20.25583 WRRS James Cook JC086
2098487Water sample data2013-05-10 07:45:3063.45278 N, 20.25583 WRRS James Cook JC086
2099000Water sample data2013-05-10 07:45:3063.45278 N, 20.25583 WRRS James Cook JC086
2099583Water sample data2013-05-10 07:45:3063.45278 N, 20.25583 WRRS James Cook JC086
2100149Water sample data2013-05-10 07:45:3063.45278 N, 20.25583 WRRS James Cook JC086
2100703Water sample data2013-05-10 07:45:3063.45278 N, 20.25583 WRRS James Cook JC086
2101718Water sample data2013-05-10 07:45:3063.45278 N, 20.25583 WRRS James Cook JC086