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Metadata Report for BODC Series Reference Number 2150029


Metadata Summary

Data Description

Data Category Water sample data
Instrument Type
NameCategories
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_026
BODC Series Reference 2150029
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2015-06-07 11:33
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval -
 

Spatial Co-ordinates

Latitude 58.88306 N ( 58° 53.0' N )
Longitude 16.99996 W ( 16° 60.0' W )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth 9.6 m
Maximum Sensor or Sampling Depth 1146.9 m
Minimum Sensor or Sampling Height 1.5 m
Maximum Sensor or Sampling Height 1138.8 m
Sea Floor Depth 1148.4 m
Sea Floor Depth Source SCILOG
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)
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

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

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.

Deployment

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) 2015-06-07
End Date (yyyy-mm-dd) 2015-06-07
Organization Undertaking ActivityNational Oceanography Centre, Southampton
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierDY031_CTD_DY031_026
Platform Categorylowered unmanned submersible

No Document Information Held for the Series

Related Data Activity activities are detailed in Appendix 1

Cruise

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 NameExtended Ellett Line Station IB5
CategoryOffshore location
Latitude58° 52.98' N
Longitude17° 0.00' W
Water depth below MSL1150.0 m

Extended Ellett Line: Fixed Station IB5

Station IB5 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.

From 2018 this mooring contributed to the UK-OSNAP project. It was referred to as the OSNAP Iceland Basin Array.

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_026

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
1878910Water sample data2015-06-07 11:34:0058.88306 N, 16.99996 WRRS Discovery DY031

Appendix 2: Extended Ellett Line Station IB5

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
1008430CTD or STD cast1997-09-12 06:01:0058.863 N, 17.00733 WRRS Discovery D230
1304917Water sample data1997-09-12 06:39:0058.86299 N, 17.0073 WRRS Discovery D230
2131498Water sample data1997-09-12 06:39:0058.86299 N, 17.0073 WRRS Discovery D230
1070879CTD or STD cast1999-09-14 21:30:0058.85183 N, 17.01317 WRRS Discovery D242
1252224Water sample data1999-09-14 21:51:0058.85183 N, 17.01317 WRRS Discovery D242
670526CTD or STD cast2001-05-08 08:18:0058.95833 N, 16.97783 WRRS Discovery D253
667310CTD or STD cast2004-07-16 08:43:0058.96433 N, 16.98833 WFS Poseidon PO314
847335CTD or STD cast2007-08-27 19:39:3958.87575 N, 16.99409 WRRS Discovery D321B
954112CTD or STD cast2009-06-15 09:48:1858.883 N, 17.00224 WRRS Discovery D340A
1053538CTD or STD cast2010-05-17 20:45:0358.88867 N, 17.01717 WRRS Discovery D351
1929813Currents -subsurface Eulerian2010-05-17 20:45:4558.8849 N, 17.0213 WRRS Discovery D351
1896615Water sample data2010-05-17 21:33:0058.89147 N, 17.01326 WRRS Discovery D351
1195604CTD or STD cast2011-05-29 02:08:4758.88317 N, 17.00283 WRRS Discovery D365
1204050CTD or STD cast2012-08-10 23:55:0058.88362 N, 17.00021 WRRS Discovery D379
1220246CTD or STD cast2013-05-17 11:31:5058.8838 N, 17.0018 WRRS James Cook JC086
2098229Water sample data2013-05-17 12:12:0058.88389 N, 17.25278 WRRS James Cook JC086
2098684Water sample data2013-05-17 12:12:0058.88389 N, 17.25278 WRRS James Cook JC086
2099208Water sample data2013-05-17 12:12:0058.88389 N, 17.25278 WRRS James Cook JC086
2099780Water sample data2013-05-17 12:12:0058.88389 N, 17.25278 WRRS James Cook JC086
2100334Water sample data2013-05-17 12:12:0058.88389 N, 17.25278 WRRS James Cook JC086
2101325Water sample data2013-05-17 12:12:0058.88389 N, 17.25278 WRRS James Cook JC086
2101872Water sample data2013-05-17 12:12:0058.88389 N, 17.25278 WRRS James Cook JC086
1370754CTD or STD cast2014-07-09 12:13:2058.853 N, 17.0012 WRRS James Clark Ross JR20140531 (JR302)
1722989CTD or STD cast2015-06-07 10:57:0458.8831 N, 17.0 WRRS Discovery DY031
1722062Currents -subsurface Eulerian2015-06-07 10:57:3358.88305 N, 16.99996 WRRS Discovery DY031
1878910Water sample data2015-06-07 11:34:0058.88306 N, 16.99996 WRRS Discovery DY031
1764360CTD or STD cast2016-06-14 09:23:5658.8831 N, 17.0024 WRRS Discovery DY052
1765492Currents -subsurface Eulerian2016-06-14 09:24:0258.88311 N, 17.00245 WRRS Discovery DY052
1874681Water sample data2016-06-14 10:00:0058.88311 N, 17.00245 WRRS Discovery DY052
2149213Water sample data2016-06-14 10:00:2858.88311 N, 17.00245 WRRS Discovery DY052
1976258CTD or STD cast2017-05-20 22:24:4158.883 N, 17.0004 WRRS Discovery DY078 (DY079)
2052404Currents -subsurface Eulerian2018-07-05 12:00:0057.801 N, 19.17067 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052416Currents -subsurface Eulerian2018-07-05 12:00:0057.801 N, 19.17067 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052686Hydrography time series at depth2018-07-05 12:00:0057.801 N, 19.17067 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052698Hydrography time series at depth2018-07-05 12:00:0057.801 N, 19.17067 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052705Hydrography time series at depth2018-07-05 12:00:0057.801 N, 19.17067 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052717Hydrography time series at depth2018-07-05 12:00:0057.801 N, 19.17067 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052729Hydrography time series at depth2018-07-05 12:00:0057.801 N, 19.17067 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052730Hydrography time series at depth2018-07-05 12:00:0057.801 N, 19.17067 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)
2052742Hydrography time series at depth2018-07-05 12:00:0057.801 N, 19.17067 WRV Neil Armstrong AR30-04 (F2018-007, OSNAP East 2018)