Metadata Report for BODC Series Reference Number 1325891
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 |
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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
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
Polypropylene 10L surface sample bottle
A polypropylene plastic bottle with 10 litre capacity that was used for surface sampling from small boats during OMEX and LOIS RACS projects in the 1990s.
Nutrients for RV Sea Vigil, RV Water Guardian, RRS Challenger CH108A and Tweed campaign cruises.
Document History
Converted from CDROM documentation.
Content of data series
AMONAAD2 | Dissolved ammonium |
Colorimetric autoanalysis (0.4/0.45 µm pore filtered) | |
Micromoles/litre | |
AMONFID2 | Dissolved ammonium |
Flow-injection ammonium analyser (0.4/0.45 µm pore filtered) | |
Micromoles/litre | |
AMONMPD1 | Dissolved ammonium |
Manual analysis using the phenol and sodium nitrocyanoferrate method (GF/F filtered) | |
Micromoles/litre | |
NTRIAAD2 | Dissolved nitrite |
Colorimetric autoanalysis (0.4/0.45 µm pore filtered) | |
Micromoles/litre | |
NTRIAATX | Nitrite (unfiltered) |
Colorimetric autoanalysis (unfiltered) | |
Micromoles/litre | |
NTRZAAD1 | Dissolved nitrate + nitrite |
Colorimetric autoanalysis (GF/F filtered) | |
Micromoles/litre | |
NTRZAAD2 | Dissolved nitrate + nitrite |
Colorimetric autoanalysis (0.4/0.45 µm pore filtered) | |
Micromoles/litre | |
NTRZAATX | Nitrate + nitrite (unfiltered) |
Colorimetric autoanalysis (unfiltered) | |
Micromoles/litre | |
PHOSAAD2 | Dissolved phosphate |
Colorimetric autoanalysis (0.4/0.45 µm pore filtered) | |
Micromoles/litre | |
PHOSAATX | Phosphate (unfiltered) |
Colorimetric autoanalysis (unfiltered) | |
Micromoles/litre | |
PHOSMAD1 | Dissolved phosphate |
Manual colorimetric analysis (GF/F filtered) | |
Micromoles/litre | |
SDAMMPD1 | Dissolved ammonium standard deviation |
Manual analysis using the phenol and sodium nitrocyanoferrate method (GF/F filtered) | |
Micromoles/litre | |
SDPHMAD1 | Dissolved phosphate standard deviation |
Manual colorimetric analysis (GF/F filtered) | |
Micromoles/litre | |
SDURMDD1 | Dissolved urea |
Manual analysis using the diacetylmonoxime method (GF/F filtered) | |
Micromoles/litre | |
SLCAAAD1 | Dissolved silicate |
Colorimetric autoanalysis (GF/F filtered) | |
Micromoles/litre | |
SLCAAAD2 | Dissolved silicate |
Colorimetric autoanalysis (0.4/0.45 µm pore filtered) | |
Micromoles/litre | |
TPHSWCD1 | Dissolved total phosphorus |
Oxidation then colorimetric analysis (GF/F filtered) | |
Micromoles/litre | |
UREAMDD1 | Dissolved urea |
Manual analysis using the diacetylmonoxime method (GF/F filtered) | |
Micromoles/litre |
Data Originator
Dr Reg Uncles, Plymouth Marine Laboratory, UK.
NB Users interested in nutrient data should be aware that there are continuous surface nutrient measurements for each RRS Challenger cruise included in the underway data set.
Sampling strategy and methodology
RV Sea Vigil cruises SV7B, SV7C, SV9A, SV9B, SV10A, SV10B, SV12A, SV12B, SV13A, SV13B, SV14B, SV14C, SV15A, SV15B, SV16, SV18A, SV18B, SV19A, SV19B, SV20B, SV21A, SV21B, SV22B, SV22C, SV23C, SV23D, SV24A, SV24B, SV25A, SV25B, SV26A, SV26B, SV27B, SV27D, SV28A, SV28B, SV29A, SV29B, SV30A, SV30B, SV31A, SV31B, SV34A, SV34B, SV35A, and SV35B.
RV Water Guardian cruises WG11B and WG11C.
Tweed campaigns TWEED01, TWEED02, TWEED03, TWEED04, TWEED05, TWEED06, TWEED07, TWEED08, TWEED09, TWEED10, TWEED11, TWEED12 and TWEED13.
RRS Challenger cruise CH108A
For the Challenger cruise data (a small number of sub-surface samples from CH108A) the water samples were drawn from the water bottles on the CTD rosette. The unfiltered samples were stored in a refrigerator until analysed (within 24 hours) as discrete samples on an Alpkem autoanalyser using established colorimetric techniques.
The autoanalyser was operated on the Sea Vigil cruises and Tweed campaigns in real time. Water from either the ship's moon pool or an overside pump was continuously flushed through a small reservoir via a continuous filter block (Morris et al., 1978) containing a 0.45 micron pore filter. The autoanalyser inlet line was kept in a reservoir of MilliQ water. On approaching a sampling station the line was switched to the filtered seawater reservoir. In this way internal blockages of the autoanalyser plumbing, caused by continuous exposure to nutrient-rich water, were avoided. Discrete sampling and manual filtering was used as a fallback strategy if operational difficulties were encountered with the autoanalyser. Samples were analysed as soon as the instrument was repaired.
The segmented-flow autoanalyser used was either a Technicon AAII or an Akpkem. In either case it was a four-channel instrument analysing various combinations of ammonium, nitrate plus nitrite, nitrite, phosphate and silicate. The chemistries used were as follows:
Nitrate: | Reduced to nitrite by a Cu/Cd coil, then reacted with sulphanilamide in acidic conditions to form a diazo compound that coupled with N-1-naphylethylenediamide dihydrochloride to form a reddish-purple azo dye. |
Nitrite: | As for nitrate without the reduction step. |
Phosphate: | Reduction of a phosphomolybdate complex in acid solution to 'molybdenum blue' by ascorbic acid with sensitivity enhanced by the catalytic action of antimony potassium tartrate. |
Silicate: | The method used for silicate was based on the reduction of a silicomolybdate in acidic solution to 'molybdenum blue' by ascorbic acid. Oxalic acid was introduced into the sample stream before the addition of ascorbic acid to eliminate interference from phosphates. |
Ammonium: | Method of Mantoura and Woodward (1983). |
On some Sea Vigil cruises ammonium was analysed by a flow injection technique. The method was based upon the conversion of the ammonium ion into gaseous ammonia across a hydrophobic membrane. It is fully described in Willason and Johnson (1986).
References
Balls, P.B. and Laslett, R., 1991. A simple estuarine water sampler suitable for trace metals and other constituents. Estuarine Coastal and Shelf Science 33, 623-629.
Mantoura, R.F.C. and Woodward, E.M.S., 1983. Optimisation of the indophenol blue method for the automated determination of ammonia in estuarine waters. Estuarine, Coastal and Shelf Science, 17, 219-224.
Morris, A.W., Howland, R.J.M. and Bale, A.J. (1978). A filtration unit for use with continuous autoanalytical systems applied to highly turbid waters. Est. Coast. Mar. Sci. 6, 105-109.
Ormaza-Gonzalez, F.I. and Statham, P.J., 1996. A comparison of methods for the determination of dissolved and particulate phosphorus in natural waters. Water Research, 30(1), 2739-2747.
Parsons, T.R., Maita, Y. and Lalli, C.M., 1984. A Manual of Chemical and Biological Methods for Seawater Analysis. Pergamon Press.
Willason S.W. and Johnson, K.S, 1986. A rapid, highly sensitive technique for the determination of ammonia in sea water. Mar. Biol. 91, 285-290.
Project Information
LOIS River-Atmosphere-Coast Study (LOIS - RACS)
Introduction
The Land-Ocean Interaction Study (LOIS) was a NERC research programme designed to study processes in the coastal zone. The Rivers, Atmosphere and Coasts Study (RACS) was a major component of LOIS that looked at land-sea interactions in the coastal zone and the major exchanges (physical, chemical and biological) between rivers and estuaries and the atmosphere. The study focused on the east coast of the UK from the Wash to the Tweed.
RACS included several sub-components
- BIOTA - A study of salt marshes of the Humber and Wash
- RACS (A) - An atmospheric chemistry study looking at air mass changes from the Wash into East Anglia
- RACS (C) - A study of the estuaries, coasts and coastal waters between Great Yarmouth and Berwick upon Tweed.
1. The coastal oceangraphic survey
2. The Humber estuarine study
3. The Tweed estuarine study
4. The Holderness experiment - RACS (R) - A study of rivers that drain into the North Sea
RACS (A) was coordinated by the University of East Anglia and RACS (C) by the Plymouth Marine Laboratory.
RACS (A)
The bulk of the RACS (A) data set was collected during two field campaigns in the winter (October/November) of 1994 and the summer (May/June) of 1995. During these campaigns data were collected continuously from the University of East Anglia Atmospheric Observatory at Weybourne on the north Norfolk coast. An instrumented vessel was stationed offshore to provide a second sampling site to allow changes in a given air mass to be monitored. The Imperial College Jetstream research aircraft made one flight during each campaign to provide a link between the two surface stations. The Jetstream made four additional flights in 1996 and 1997.
RACS (C)
The coastal oceanographic survey
The coastal oceanographic data set was collected during a series of 17 RRS Challenger cruise legs. Most cruises covered two survey grids. One from Great Yarmouth to the Humber designed around the distribution of the sandbanks and a second simple zig-zag grid from the Humber to Berwick on Tweed. A large number of anchor stations, usually over one or two tidal cycles, were worked in the area of the Humber mouth or the Holderness coast.
The Humber estuarine study
The Humber estuarine data set was collected during a series of 33 campaigns on the Environment Agency vessels Sea Vigil and Water Guardian in the Humber, Trent and Ouse river systems at approximately monthly intervals between June 1993 and December 1996. Each campaign consisted of two or three one-day cruises. The tracks covered the estuary from the tidal limits of both Trent and Ouse to Spurn Point. Instrumental and sample data are available from a series of fixed stations that were sampled during every campaign.
The Tweed estuarine study
The Tweed estuarine data set was collected during a series of 13 campaigns using RV Tamaris in association with a rigid inflatable vessel at approximately monthly intervals between July 1996 and July 1997. Each campaign covered the tidal reaches of the River Tweed.
The Holderness experiment
The Holderness Experiment was designed to monitor the process of sediment transport along the Holderness coastline. It consisted of three moored instrument deployments during the winters of 1993-1994, 1994-1995 and 1995-1996. Mooring platforms were deployed at eight stations along two lines off the Holderness coast. A northerly and a southerly line of four stations each were used (N1 - N4 and S1 to S4) with the lowest numbers being inshore. Both lines were approximately perpendicular to the coast, although the S4 station lay to the south of the S line, off Spurn Head.
Data Activity or Cruise Information
Data Activity
Start Date (yyyy-mm-dd) | 1996-12-09 |
End Date (yyyy-mm-dd) | Ongoing |
Organization Undertaking Activity | Plymouth Marine Laboratory |
Country of Organization | United Kingdom |
Originator's Data Activity Identifier | TWEED05_BOTTLE_RIB10 |
Platform Category | lowered unmanned submersible |
BODC Sample Metadata Report for TWEED05_BOTTLE_RIB10
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 |
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386056 | 10.00 | .00 | Polypropylene 10L surface sample 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.
Cruise
Cruise Name | TWEED05 |
Departure Date | 1996-12-08 |
Arrival Date | 1996-12-12 |
Principal Scientist(s) | Robert J Clifton (Plymouth Marine Laboratory) |
Ship | RL Tamaris |
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 |
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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 |
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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 |