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Metadata Report for BODC Series Reference Number 2150472

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 Prof Penny Holliday
Originating Organization National Oceanography Centre, Southampton
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) NOCS National Capability

Data Identifiers

Originator's Identifier DY031_CTD_NUTS_213:DY031_069
BODC Series Reference 2150472

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2015-06-14 13:42
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval -

Spatial Co-ordinates

Latitude 56.94957 N ( 56° 57.0' N )
Longitude 8.78225 W ( 8° 46.9' W )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth 4.2 m
Maximum Sensor or Sampling Depth 117.2 m
Minimum Sensor or Sampling Height 5.4 m
Maximum Sensor or Sampling Height 118.4 m
Sea Floor Depth 122.6 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.

Discrete Dissolved Inorganic Nutrient Samples from CTD bottles for RRS Discovery Cruise DY031

Originator's Protocol for Data Acquisition and Analysis

Water samples were drawn from the CTD rosette bottles deployed during the cruise with samples taken from 80 of the total of 85 CTD casts undertaken.

Samples were collected in 250ml acid cleaned polythene bottles directly from CTD spigots without the use of a tube and using a single half-full rinse prior to collection. 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. Standards were prepared in deionised water and samples were run in a carrier stream of deionised water. For more information see the cruise report.

BODC Data Processing Procedures

The sample data were supplied to BODC in MStar format. Data received were loaded into the BODC database using established BODC data banking procedure. Originator's parameters were mapped with BODC codes as follows;

Originator's Parameter Unit Description BODC Parameter code BODC Unit Comments
Phosphate µM Concentration of phosphate in the water column by colorimetric autoanalysis (unfiltered) PHOSAATX µM n/a
Silicate µM Concentration of silicate in the water column by colorimetric autoanalysis (unfiltered) SLCAAATX µM n/a
Nitrate and nitrite µM Concentration of nitrate and nitrite in the water column by colorimetric autoanalysis (unfiltered) NTRZAATX µM n/a

Project Information

NOCS National Capability

The National Oceanography Centre Southampton National Capability focuses on long term science concerned with basin/decadal variability of the Ocean.

Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 2015-06-14
End Date (yyyy-mm-dd) 2015-06-14
Organization Undertaking ActivityNational Oceanography Centre, Southampton
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierDY031_CTD_DY031_069
Platform Categorylowered unmanned submersible

No Document Information Held for the Series

Related Data Activity activities are detailed in Appendix 1


Cruise Name DY031
Departure Date 2015-05-29
Arrival Date 2015-06-17
Principal Scientist(s)N Penny Holliday (National Oceanography Centre, Southampton)
Ship RRS Discovery

Complete Cruise Metadata Report is available here

Fixed Station Information

Fixed Station Information

Station NameEllett Line/Extended Ellett Line Station S
CategoryOffshore location
Latitude56° 57.00' N
Longitude8° 46.98' W
Water depth below MSL125.0 m

Ellett Line/Extended Ellett Line: Station S

Station S is one of the fixed CTD stations, which together form The Extended Ellett Line. The line lies between Iceland and the Sound of Mull (Scotland) crossing the Iceland Basin and Rockall Trough via the outcrop of Rockall. As part of this initiative, CTD dips, together with associated discrete sampling of the water column, have typically been carried out annually at this station since September 1996.

Prior to September 1996, Station S was part of a shorter repeated survey section, consisting of 35 fixed stations, known as The Ellett Line (originally termed the Anton Dohrn Seamount Section). This line incorporated those stations across the Rockall Trough and Scottish shelf between Rockall and the Sound of Mull and was visited at regular intervals (usually at least once a year) between 1975 and January 1996.

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: DY031_CTD_DY031_069

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
1879360Water sample data2015-06-14 13:43:0056.94957 N, 8.78225 WRRS Discovery DY031

Appendix 2: Ellett Line/Extended Ellett Line Station S

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
89206CTD or STD cast1975-07-05 00:51:0056.95 N, 8.7833 WRRS Challenger CH10A/75
89673CTD or STD cast1975-08-31 12:10:0056.95 N, 8.7833 WRRS Challenger CH12A/75
90096CTD or STD cast1975-11-08 07:11:0056.9383 N, 8.7916 WRRS Challenger CH14A/75
91143CTD or STD cast1976-05-21 01:42:0056.95 N, 8.7833 WRRS Challenger CH8/76
91954CTD or STD cast1977-04-15 01:40:0056.95 N, 8.7833 WRRS Challenger CH6B/77
94282CTD or STD cast1977-07-24 23:35:0056.9483 N, 8.7833 WRRS Challenger CH11/77
88670CTD or STD cast1977-08-21 12:50:0056.9366 N, 8.7783 WRRS Challenger CH13/77
92263CTD or STD cast1978-02-03 01:27:0056.95 N, 8.7833 WRRS Challenger CH2/78
94558CTD or STD cast1978-04-17 15:38:0056.9333 N, 8.7583 WRRS Challenger CH6/78
95574CTD or STD cast1978-06-08 14:44:0056.9466 N, 8.7716 WRRS Challenger CH9/78
186142CTD or STD cast1978-08-10 22:53:0056.945 N, 8.8033 WRRS Challenger CH11B/78
314385CTD or STD cast1978-11-06 05:45:0056.9433 N, 8.7667 WRRS Challenger CH14B/78
98756CTD or STD cast1979-05-21 18:40:0056.95 N, 8.7833 WRRS Challenger CH7/79
99839CTD or STD cast1979-06-27 20:14:0056.9583 N, 8.755 WRRS Shackleton S5/79
95887CTD or STD cast1979-09-14 01:50:0056.9333 N, 8.775 WRRS Challenger CH13/79
96079CTD or STD cast1979-10-29 18:34:0056.9533 N, 8.795 WRRS Challenger CH16/79
187747CTD or STD cast1980-03-04 10:18:0056.95 N, 8.7833 WRRS Challenger CH4/80
189705CTD or STD cast1980-06-01 15:26:0056.9483 N, 8.7933 WRRS Challenger CH9B/80
187920CTD or STD cast1981-04-13 10:09:0056.9483 N, 8.7783 WRRS Challenger CH6A/81
188449CTD or STD cast1981-04-21 04:55:0056.9533 N, 8.7883 WRRS Challenger CH6B/81
192264CTD or STD cast1981-07-12 23:55:0056.945 N, 8.7816 WRRS Challenger CH10/81
193440CTD or STD cast1983-05-24 15:14:0056.9533 N, 8.81 WRRS Challenger CH7B/83
313204CTD or STD cast1984-06-27 16:43:0056.9517 N, 8.7917 WRRS Challenger CH2/84
257925CTD or STD cast1984-12-02 09:34:0056.9483 N, 8.7833 WRRS Challenger CH10/84
258375CTD or STD cast1985-01-26 20:09:0056.9483 N, 8.7816 WRRS Challenger CH1/85
253881CTD or STD cast1985-05-08 14:36:0056.95 N, 8.7833 WRRS Challenger CH4/85
261186CTD or STD cast1985-08-20 02:58:0056.95 N, 8.7833 WRRS Challenger CH8/85
264160CTD or STD cast1987-01-10 06:45:0056.95 N, 8.7833 WRRS Challenger CH9
250582CTD or STD cast1987-04-30 11:29:0056.95 N, 8.7816 WRRS Challenger CH14
251628CTD or STD cast1987-11-27 19:36:0056.9516 N, 8.7833 WRRS Challenger CH22
266928CTD or STD cast1988-03-06 13:23:0056.9516 N, 8.7833 WRRS Challenger CH25
263979CTD or STD cast1988-06-20 13:37:0056.9466 N, 8.785 WRRS Challenger CH30
265359CTD or STD cast1989-01-24 12:40:0056.95 N, 8.7833 WRRS Discovery D180
265857CTD or STD cast1989-05-06 03:29:0056.95 N, 8.7833 WRV Lough Foyle LF1/89
317635CTD or STD cast1989-08-05 07:17:0056.95 N, 8.7817 WRV Lough Foyle LF2/89
316804CTD or STD cast1989-11-25 23:08:0056.9517 N, 8.785 WRRS Charles Darwin CD44
259840CTD or STD cast1990-09-02 17:10:0056.95 N, 8.7833 WRRS Challenger CH71A
315991CTD or STD cast1990-12-10 21:07:0056.95 N, 8.7817 WRRS Challenger CH74A_1
382493CTD or STD cast1991-02-26 17:16:0056.9483 N, 8.78 WRRS Challenger CH75B
316195CTD or STD cast1991-07-02 13:56:0056.9567 N, 8.7883 WRRS Challenger CH81
386482CTD or STD cast1992-09-26 15:44:0056.95 N, 8.7817 WRRS Challenger CH97
385755CTD or STD cast1993-05-17 08:53:0056.9517 N, 8.7867 WRRS Challenger CH103
385939CTD or STD cast1993-05-20 02:19:0056.95 N, 8.7783 WRRS Challenger CH103
387922CTD or STD cast1993-09-09 03:47:0056.9508 N, 8.7867 WRRS Challenger CH105
388083CTD or STD cast1993-09-11 00:16:0056.9507 N, 8.7848 WRRS Challenger CH105
389062CTD or STD cast1994-03-17 21:49:0056.95 N, 8.7833 WRRS Challenger CH110
389511CTD or STD cast1994-05-08 07:54:0056.95 N, 8.7833 WRRS Challenger CH112
390794CTD or STD cast1994-08-16 15:22:0056.9422 N, 8.7838 WRRS Challenger CH114
391969CTD or STD cast1994-11-24 14:37:0056.9505 N, 8.7745 WRRS Challenger CH116
434688CTD or STD cast1995-04-15 10:28:0056.95 N, 8.7833 WRRS Charles Darwin CD92B
435551CTD or STD cast1995-05-01 05:37:0056.95 N, 8.7833 WRRS Charles Darwin CD92B
390407CTD or STD cast1995-07-30 06:18:0056.95 N, 8.7833 WRRS Challenger CH120
434013CTD or STD cast1996-01-12 14:41:0056.95 N, 8.7833 WRRS Challenger CH124
1289311Water sample data1996-01-12 14:41:0056.95 N, 8.7833 WRRS Challenger CH124
1014552CTD or STD cast1996-09-30 17:14:0056.953 N, 8.78133 WRRS Discovery D223A
1850052Water sample data1996-09-30 17:27:0056.95301 N, 8.7813 WRRS Discovery D223A
1070610CTD or STD cast1999-09-11 14:39:0056.95133 N, 8.78383 WRRS Discovery D242
1251940Water sample data1999-09-11 14:46:0056.95133 N, 8.78383 WRRS Discovery D242
1075097CTD or STD cast2000-02-03 06:12:0056.9475 N, 8.7795 WRRS Discovery D245
559228CTD or STD cast2000-05-19 05:56:0056.9483 N, 8.7833 WFRV Scotia 0700S
1230486Water sample data2000-05-19 05:56:0056.9485 N, 8.78383 WFRV Scotia 0700S
1220848CTD or STD cast2001-05-20 05:40:0056.95167 N, 8.785 WRRS Discovery D253
626678CTD or STD cast2003-04-17 20:04:0056.9495 N, 8.7747 WFRV Scotia 0703S
845107CTD or STD cast2003-07-24 19:35:0056.9494 N, 8.78218 WFS Poseidon PO300_2
667057CTD or STD cast2004-07-13 01:49:0056.94867 N, 8.784 WFS Poseidon PO314
776676CTD or STD cast2006-10-26 09:31:2656.94983 N, 8.78333 WRRS Discovery D312
847520CTD or STD cast2007-08-30 16:19:3156.94837 N, 8.7809 WRRS Discovery D321B
880941CTD or STD cast2008-05-23 10:41:0056.94983 N, 8.78317 WFRV Scotia 0508S
1616958Water sample data2008-05-23 10:41:0056.94983 N, 8.78317 WFRV Scotia 0508S
954382CTD or STD cast2009-06-20 17:52:2656.9456 N, 8.78315 WRRS Discovery D340A
1052836CTD or STD cast2010-05-20 23:24:5156.94917 N, 8.78017 WRRS Discovery D351
1930040Currents -subsurface Eulerian2010-05-20 23:25:2856.9502 N, 8.7814 WRRS Discovery D351
1896885Water sample data2010-05-20 23:36:0056.94844 N, 8.77903 WRRS Discovery D351
1195850CTD or STD cast2011-05-31 17:50:2256.9505 N, 8.78017 WRRS Discovery D365
1203384CTD or STD cast2012-08-03 07:48:0056.94807 N, 8.77737 WRRS Discovery D379
1220756CTD or STD cast2013-05-24 18:17:3756.9496 N, 8.7827 WRRS James Cook JC086
2098475Water sample data2013-05-24 18:29:0057.20306 N, 9.03972 WRRS James Cook JC086
2099546Water sample data2013-05-24 18:29:0057.20306 N, 9.03972 WRRS James Cook JC086
2100137Water sample data2013-05-24 18:29:0057.20306 N, 9.03972 WRRS James Cook JC086
2100696Water sample data2013-05-24 18:29:0057.20306 N, 9.03972 WRRS James Cook JC086
2101675Water sample data2013-05-24 18:29:0057.20306 N, 9.03972 WRRS James Cook JC086
1371272CTD or STD cast2014-07-16 10:10:0856.9499 N, 8.7822 WRRS James Clark Ross JR20140531 (JR302)
1723446CTD or STD cast2015-06-14 13:32:2556.9496 N, 8.7822 WRRS Discovery DY031
1722547Currents -subsurface Eulerian2015-06-14 13:34:1556.94956 N, 8.78226 WRRS Discovery DY031
1879360Water sample data2015-06-14 13:43:0056.94957 N, 8.78225 WRRS Discovery DY031
1764704CTD or STD cast2016-06-19 05:27:0656.9516 N, 8.7831 WRRS Discovery DY052
1765836Currents -subsurface Eulerian2016-06-19 05:27:2256.95156 N, 8.78314 WRRS Discovery DY052
2149538Water sample data2016-06-19 05:34:3356.95155 N, 8.78314 WRRS Discovery DY052
1875021Water sample data2016-06-19 05:35:0056.95155 N, 8.78314 WRRS Discovery DY052
1975937CTD or STD cast2017-05-15 17:37:2456.9504 N, 8.7824 WRRS Discovery DY078 (DY079)