Metadata Report for BODC Series Reference Number 2149840
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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Spatial Co-ordinates | |||||||||||||||||||||||||||||||||||||
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Parameters |
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Definition of BOTTFLAG | |||||||||||||||||||||||||||||||||||||
| BOTTFLAG | Definition |
|---|---|
| 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 supplied by Natural Environment Research Council (NERC)
You must always use the following attribution statement to acknowledge the source of the information: "Contains data supplied by Natural Environment Research Council."
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) | 2015-06-03 |
| End Date (yyyy-mm-dd) | 2015-06-03 |
| Organization Undertaking Activity | National Oceanography Centre, Southampton |
| Country of Organization | United Kingdom |
| Originator's Data Activity Identifier | DY031_CTD_DY031_008 |
| Platform Category | lowered 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 Name | Extended Ellett Line Station IB17 |
| Category | Offshore location |
| Latitude | 62° 0.00' N |
| Longitude | 20° 0.00' W |
| Water depth below MSL | 1700.0 m |
Extended Ellett Line: Fixed Station IB17
Station IB17 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.
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_008
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 |
|---|---|---|---|---|
| 1878750 | Water sample data | 2015-06-03 20:58:00 | 62.00006 N, 19.99902 W | RRS Discovery DY031 |
Appendix 2: Extended Ellett Line Station IB17
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 |
|---|---|---|---|---|
| 1008313 | CTD or STD cast | 1997-09-09 22:20:00 | 61.96367 N, 19.9925 W | RRS Discovery D230 |
| 2131370 | Water sample data | 1997-09-09 23:14:30 | 61.96365 N, 19.99248 W | RRS Discovery D230 |
| 1304794 | Water sample data | 1997-09-09 23:15:00 | 61.96365 N, 19.99248 W | RRS Discovery D230 |
| 1020441 | CTD or STD cast | 1998-05-23 05:58:00 | 62.00283 N, 19.99167 W | RRS Discovery D233 |
| 1306101 | Water sample data | 1998-05-23 06:50:00 | 62.00277 N, 19.99165 W | RRS Discovery D233 |
| 1849259 | Water sample data | 1998-05-23 06:50:00 | 62.00277 N, 19.99165 W | RRS Discovery D233 |
| 1070996 | CTD or STD cast | 1999-09-17 06:04:00 | 61.96433 N, 19.99767 W | RRS Discovery D242 |
| 1252365 | Water sample data | 1999-09-17 06:32:00 | 61.96433 N, 19.99767 W | RRS Discovery D242 |
| 670631 | CTD or STD cast | 2001-05-10 21:24:00 | 61.99383 N, 19.98867 W | RRS Discovery D253 |
| 667451 | CTD or STD cast | 2004-07-18 10:46:00 | 61.99117 N, 20.00483 W | FS Poseidon PO314 |
| 896795 | CTD or STD cast | 2005-10-19 08:09:00 | 61.99938 N, 20.00314 W | RRS Charles Darwin CD176 |
| 2079416 | Water sample data | 2005-10-19 08:58:51 | 61.99938 N, 20.00314 W | RRS Charles Darwin CD176 |
| 2139857 | Water sample data | 2005-10-19 08:58:51 | 61.99938 N, 20.00314 W | RRS Charles Darwin CD176 |
| 776314 | CTD or STD cast | 2006-10-13 16:20:41 | 62.00183 N, 20.023 W | RRS Discovery D312 |
| 847311 | CTD or STD cast | 2007-08-26 17:06:30 | 61.99616 N, 20.00211 W | RRS Discovery D321B |
| 953968 | CTD or STD cast | 2009-06-11 19:45:39 | 61.9998 N, 19.99938 W | RRS Discovery D340A |
| 1053446 | CTD or STD cast | 2010-05-13 13:22:44 | 61.99267 N, 20.02567 W | RRS Discovery D351 |
| 1929653 | Currents -subsurface Eulerian | 2010-05-13 13:23:24 | 61.9974 N, 20.0109 W | RRS Discovery D351 |
| 1896443 | Water sample data | 2010-05-13 14:26:00 | 61.99306 N, 20.02305 W | RRS Discovery D351 |
| 1195432 | CTD or STD cast | 2011-05-25 11:10:10 | 61.99867 N, 19.99933 W | RRS Discovery D365 |
| 1204295 | CTD or STD cast | 2012-08-14 09:04:00 | 62.00029 N, 20.00234 W | RRS Discovery D379 |
| 1220098 | CTD or STD cast | 2013-05-11 02:50:38 | 61.9991 N, 20.0025 W | RRS James Cook JC086 |
| 2098094 | Water sample data | 2013-05-11 03:37:00 | 62.00944 N, 20.00389 W | RRS James Cook JC086 |
| 2098555 | Water sample data | 2013-05-11 03:37:00 | 62.00944 N, 20.00389 W | RRS James Cook JC086 |
| 2099073 | Water sample data | 2013-05-11 03:37:00 | 62.00944 N, 20.00389 W | RRS James Cook JC086 |
| 2099651 | Water sample data | 2013-05-11 03:37:00 | 62.00944 N, 20.00389 W | RRS James Cook JC086 |
| 2100205 | Water sample data | 2013-05-11 03:37:00 | 62.00944 N, 20.00389 W | RRS James Cook JC086 |
| 2100764 | Water sample data | 2013-05-11 03:37:00 | 62.00944 N, 20.00389 W | RRS James Cook JC086 |
| 2101189 | Water sample data | 2013-05-11 03:37:00 | 62.00944 N, 20.00389 W | RRS James Cook JC086 |
| 1370987 | CTD or STD cast | 2014-07-12 11:21:44 | 61.9998 N, 19.9998 W | RRS James Clark Ross JR20140531 (JR302) |
| 1721882 | Currents -subsurface Eulerian | 2015-06-03 20:05:36 | 62.00006 N, 19.99902 W | RRS Discovery DY031 |
| 1722781 | CTD or STD cast | 2015-06-03 20:05:47 | 62.0001 N, 19.999 W | RRS Discovery DY031 |
| 1878750 | Water sample data | 2015-06-03 20:58:00 | 62.00006 N, 19.99902 W | RRS Discovery DY031 |
| 1764175 | CTD or STD cast | 2016-06-11 13:23:42 | 62.0003 N, 20.0022 W | RRS Discovery DY052 |
| 1765302 | Currents -subsurface Eulerian | 2016-06-11 13:23:59 | 62.00032 N, 20.00224 W | RRS Discovery DY052 |
| 2149041 | Water sample data | 2016-06-11 14:16:51 | 62.00032 N, 20.00226 W | RRS Discovery DY052 |
| 1874503 | Water sample data | 2016-06-11 14:17:00 | 62.00032 N, 20.00226 W | RRS Discovery DY052 |
| 1976535 | CTD or STD cast | 2017-05-25 16:13:25 | 62.0002 N, 20.001 W | RRS Discovery DY078 (DY079) |
