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Metadata Report for BODC Series Reference Number 1300732

Metadata Summary

Data Description

Data Category Water sample data
Instrument Type
General Oceanics GO-FLO water sampler  discrete water samplers
Instrument Mounting lowered unmanned submersible
Originating Country United Kingdom
Originator Mr Malcolm Woodward
Originating Organization Plymouth Marine Laboratory
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) ARABESQUE

Data Identifiers

Originator's Identifier DI212_CTD_NUTS_62:A3/13
BODC Series Reference 1300732

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1994-12-01 00:27
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval -

Spatial Co-ordinates

Latitude 16.34985 N ( 16° 21.0' N )
Longitude 61.80418 E ( 61° 48.3' E )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth 0.5 m
Maximum Sensor or Sampling Depth 79.6 m
Minimum Sensor or Sampling Height 3824.2 m
Maximum Sensor or Sampling Height 3903.3 m
Sea Floor Depth 3903.8 m
Sea Floor Depth Source PEVENT
Sensor or Sampling Distribution Unspecified -
Sensor or Sampling Depth Datum Unspecified -
Sea Floor Depth Datum Instantaneous - Depth measured below water line or instantaneous water body surface


BODC CODERankUnitsTitle
ADEPZZ011MetresDepth (spatial coordinate) relative to water surface in the water body
BOTTFLAG1Not applicableSampling process quality flag (BODC C22)
NTRIAATX1Micromoles per litreConcentration of nitrite {NO2- CAS 14797-65-0} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis
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
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 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

Nutrients for cruises RRS Discovery DI210 and DI212 (ARABESQUE project)

Document History

Converted from CDROM documentation

Parameter Code Definitions

NTRZAATX Nitrate + nitrite concentration µmol/litre
Colorometric autoanalysis (unfiltered)
NTRIAATX Nitrite concentration µmol/litre
Colorometric autoanalysis (unfiltered)
AMONAATX Ammonium concentration µmol/litre
Colorometric autoanalysis (unfiltered)
PHOSAATX Phosphate concentration µmol/litre
Colorometric autoanalysis (unfiltered)
SLCAAATX Silicate concentration µmol/litre
Colorometric autoanalysis (unfiltered)
UREAAATX Urea concentration µmol/litre
Colorometric autoanalysis (unfiltered)

Originator Code Definitions

62 E.M.S. Woodward Plymouth Marine Laboratory

Originator Protocols

Standard autoanalyser methods were used as described in Rees et al (1995) for the measurement of nitrate+nitrite, nitrite, phosphate, silicate and urea. A new semicontinuous fluorescence analytical technique was used for ammonia, capable of nanomolar detection levels. In oligotrophic water, a nanomolar chemiluminescent analysis system was used.


Rees, A.P., Owens, N.J.P. and Woodward, E.M.S. 1995. Phytoplankton nitrogen assimilation at low nutrient concentrations in the NW Mediterranean Sea. Water Pollution Research Report 32 in EROS 2000 ed J-M Martin and Barth, European Commission, 141- 148.

GO-FLO Bottle

A water sampling bottle featuring close-open-close operation. The bottle opens automatically at approximately 10 metres and flushes until closed. Sampling with these bottles avoids contamination at the surface, internal spring contamination, loss of sample on deck and exchange of water from different depths.

There are several sizes available, from 1.7 to 100 litres and are made of PVC with a depth rating of up to 500 m. These bottles can be attached to a rosette or placed on a cable at selected positions.

Project Information


ARABESQUE was a multidisciplinary oceanographic research project focused on the Arabian Sea and Northwest Indian Ocean during the monsoon and intermonsoon season in 1994. Funding for ARABESQUE was provided by the Ministry of Defence/ Defence Research Agency Joint Grant TQ/10/3/2 and Amersham International as well as the Natural Environment Research Council. ARABESQUE was almost entirely field based with extensive physical, chemical and biological measurements made in the Gulf of Oman, the Arabian Sea and the Northwest Indian Ocean. The aim of the project was to study the upper ocean microbial biogeochemistry in the Arabian Sea. Its focus was carbon and nitrogen cycling processes linked to climate change. The project was a UK contribution to the Joint Global Ocean Flux Study (JGOFS) Process Studies of the Arabian Sea. ARABESQUE was organised by Plymouth Marine Laboratory (PML).


The detailed scientific objectives of ARABESQUE were to quantify the seasonal influence of the Monsoon winds in the Arabian Sea on:

  • Upwelling of nutrients and the resultant production and fate of phytoplankton, in terms of size-fractionated, new and regenerated production

  • Vertical and on-shelf gradients of heterotrophic, methanogenic and denitrifying bacteria

  • Distribution of chemotaxonomic pigments with links to optical properties of seawater

  • The Dissolved Inorganic and Organic Carbon cycle

  • Air-sea exchange of Sulphur and Nitrogen biogases including dimethyl sulphide, methylamines and methane

  • Sedimentation rates and the fate of organic matter through the oxygen depleted zone

A final objective was to calibrate satellite data on ocean colour so as to map the biogeochemistry of the northwestern Indian Ocean.


The fieldwork programme consisted of two cruises of RRS Discovery. Cruise 210 (from 27 August to 4 October 1994) was timed to coincide with the South West Monsoon. Cruise 212 (from 16 November to 19 December 1994) took place during the intermonsoon period through to the onset of the North East Monsoon. The fieldwork programme included three repeated sections;

  • One section along the Gulf of Oman

  • A section at 8°N 67°E to 14° 30N 67°E

  • A major section from 8°N 67°E to the coast of Oman

Other one-off sections were also crossed in the area. Sections were covered by underway upper ocean measurements and by a total of 21 sites where CTD/water-bottle stations were taken, 14 of which were repeated.

Data Management

Data management services to the ARABESQUE project were provided by the British Oceanographic Data Centre, funded by the UK Natural Environment Research Council.

Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 1994-12-01
End Date (yyyy-mm-dd) 1994-12-01
Organization Undertaking ActivityPlymouth Marine Laboratory
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierDI212_CTD_A3/13
Platform Categorylowered unmanned submersible

BODC Sample Metadata Report for DI212_CTD_A3/13

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
69727   10.00       80.90   82.90   79.60 General Oceanics GO-FLO water sampler No problem reported    
69728   10.00       67.30   69.20   66.00 General Oceanics GO-FLO water sampler No problem reported    
69729   10.00       62.20   64.20   61.00 General Oceanics GO-FLO water sampler No problem reported    
69730   10.00       54.00   55.80   52.80 General Oceanics GO-FLO water sampler No problem reported    
69731   10.00       46.70   48.90   45.70 General Oceanics GO-FLO water sampler No problem reported    
69732   10.00       34.90   37.00   33.90 General Oceanics GO-FLO water sampler No problem reported    
69733   10.00       29.50   30.70   28.10 General Oceanics GO-FLO water sampler No problem reported    
80364   10.00         .50    1.50     .50 General Oceanics GO-FLO water sampler No problem reported    
80365   10.00       10.50   11.50    9.10 General Oceanics GO-FLO water sampler No problem reported    
80366   10.00       18.50   19.50   17.10 General Oceanics GO-FLO water sampler 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 Name D212
Departure Date 1994-11-16
Arrival Date 1994-12-19
Principal Scientist(s)Peter H Burkill (Plymouth Marine Laboratory)
Ship RRS Discovery

Complete Cruise Metadata Report is available here

Fixed Station Information

Fixed Station Information

Station NameARABESQUE Arabian Sea Station 3 (A3)
CategoryOffshore location
Latitude16° 2.20' N
Longitude62° 0.00' E
Water depth below MSL3927.0 m

ARABESQUE - Arabian Sea Station 3 (A3)

Site A3 is one of 20 ARABESQUE fixed stations illustrated in the map below.

BODC image

ARABESQUE fixed stations were visited by 2 cruises, namely: RRS Discovery 210 (D210) - 25 August to 05 October 1994 and RRS Discovery 212 (D212) - 16 November to 19 December 1994. The cruises operated in survey and station mode: station mode consisted of profiling, production and trap stations.

More information is available via the D210 and D212 cruise reports.

Related Fixed Station activities are detailed in Appendix 1

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
Q value below limit of quantification

Appendix 1: ARABESQUE Arabian Sea Station 3 (A3)

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
966125CTD or STD cast1994-09-11 23:35:0016.0265 N, 62.00467 ERRS Discovery D210
1653810Water sample data1994-09-11 23:47:0016.02646 N, 62.00474 ERRS Discovery D210
966137CTD or STD cast1994-09-12 00:09:0016.02733 N, 62.0015 ERRS Discovery D210
966149CTD or STD cast1994-09-12 00:37:0016.02433 N, 62.00417 ERRS Discovery D210
966150CTD or STD cast1994-09-12 01:09:0016.02033 N, 62.007 ERRS Discovery D210
965797CTD or STD cast1994-09-12 08:57:0015.99617 N, 62.06217 ERRS Discovery D210
965804CTD or STD cast1994-09-12 11:06:0015.98633 N, 62.07067 ERRS Discovery D210
965816CTD or STD cast1994-09-13 00:38:0015.97633 N, 62.10033 ERRS Discovery D210
1653809Water sample data1994-09-13 00:48:0015.97631 N, 62.10038 ERRS Discovery D210
965828CTD or STD cast1994-09-13 02:36:0015.96867 N, 62.09083 ERRS Discovery D210
965841CTD or STD cast1994-09-13 06:08:0015.97417 N, 62.09467 ERRS Discovery D210
1851147Water sample data1994-09-13 06:31:0015.97418 N, 62.09462 ERRS Discovery D210
965853CTD or STD cast1994-09-13 08:37:0015.988 N, 62.1065 ERRS Discovery D210
965865CTD or STD cast1994-09-13 09:31:0015.9895 N, 62.11083 ERRS Discovery D210
1851159Water sample data1994-09-13 11:01:0015.98949 N, 62.11084 ERRS Discovery D210
965877CTD or STD cast1994-09-13 23:45:0015.95717 N, 62.18183 ERRS Discovery D210
1653822Water sample data1994-09-13 23:53:0015.95713 N, 62.1819 ERRS Discovery D210
965889CTD or STD cast1994-09-14 00:25:0015.9505 N, 62.18267 ERRS Discovery D210
965890CTD or STD cast1994-09-14 01:07:0015.94933 N, 62.181 ERRS Discovery D210
965908CTD or STD cast1994-09-14 03:33:0015.94033 N, 62.186 ERRS Discovery D210
965921CTD or STD cast1994-09-14 04:21:0015.9345 N, 62.19067 ERRS Discovery D210
1851160Water sample data1994-09-14 05:30:0015.93447 N, 62.19073 ERRS Discovery D210
965933CTD or STD cast1994-09-14 07:31:0015.92317 N, 62.19783 ERRS Discovery D210
965945CTD or STD cast1994-09-14 09:04:0015.9185 N, 62.19133 ERRS Discovery D210
965619CTD or STD cast1994-09-14 11:29:0015.914 N, 62.19717 ERRS Discovery D210
965620CTD or STD cast1994-09-14 13:29:0015.91133 N, 62.19633 ERRS Discovery D210
965632CTD or STD cast1994-09-15 00:50:0015.92783 N, 62.20433 ERRS Discovery D210
965644CTD or STD cast1994-09-15 01:32:0015.92933 N, 62.20733 ERRS Discovery D210
1653834Water sample data1994-09-15 01:45:0015.92938 N, 62.20734 ERRS Discovery D210
965656CTD or STD cast1994-09-15 07:24:0015.9255 N, 62.22 ERRS Discovery D210
965263CTD or STD cast1994-09-27 23:02:0016.03617 N, 62.002 ERRS Discovery D210
1653846Water sample data1994-09-27 23:13:0016.03614 N, 62.00198 ERRS Discovery D210
965275CTD or STD cast1994-09-27 23:59:0016.03833 N, 62.009 ERRS Discovery D210
964930CTD or STD cast1994-09-28 00:42:0016.04133 N, 62.01633 ERRS Discovery D210
964942CTD or STD cast1994-09-28 02:24:0016.06 N, 62.01633 ERRS Discovery D210
1851172Water sample data1994-09-28 03:57:0016.05996 N, 62.01635 ERRS Discovery D210
964954CTD or STD cast1994-09-28 07:39:0016.0775 N, 62.03517 ERRS Discovery D210
964966CTD or STD cast1994-09-28 08:21:0016.07683 N, 62.04617 ERRS Discovery D210
1851184Water sample data1994-09-28 08:37:0016.07687 N, 62.04614 ERRS Discovery D210
967780CTD or STD cast1994-11-29 23:02:0016.03983 N, 61.99833 ERRS Discovery D212
967313CTD or STD cast1994-11-30 00:37:0016.06317 N, 61.98017 ERRS Discovery D212
1300812Water sample data1994-11-30 01:19:0016.06317 N, 61.98018 ERRS Discovery D212
967325CTD or STD cast1994-11-30 04:14:0016.09933 N, 61.95683 ERRS Discovery D212
1300873Water sample data1994-11-30 04:40:0016.09927 N, 61.95691 ERRS Discovery D212
1868755Water sample data1994-11-30 04:40:0016.09927 N, 61.95691 ERRS Discovery D212
967337CTD or STD cast1994-11-30 07:28:0016.13817 N, 61.91067 ERRS Discovery D212
966924CTD or STD cast1994-12-01 00:10:0016.34983 N, 61.80417 ERRS Discovery D212
967349CTD or STD cast1994-12-01 01:26:0016.355 N, 61.8085 ERRS Discovery D212
967350CTD or STD cast1994-12-01 03:54:0016.40483 N, 61.796 ERRS Discovery D212
967362CTD or STD cast1994-12-01 07:56:0016.4335 N, 61.782 ERRS Discovery D212
967374CTD or STD cast1994-12-01 09:38:0016.45367 N, 61.77 ERRS Discovery D212
1300744Water sample data1994-12-01 09:58:0016.45359 N, 61.76993 ERRS Discovery D212
1868699Water sample data1994-12-01 09:58:0016.45359 N, 61.76993 ERRS Discovery D212
967386CTD or STD cast1994-12-02 00:41:0016.622 N, 61.66583 ERRS Discovery D212
1300756Water sample data1994-12-02 00:58:0016.62207 N, 61.66583 ERRS Discovery D212
967398CTD or STD cast1994-12-02 03:59:0016.68567 N, 61.64217 ERRS Discovery D212
1300768Water sample data1994-12-02 04:26:0016.68575 N, 61.64217 ERRS Discovery D212
967405CTD or STD cast1994-12-02 07:54:0016.727 N, 61.62233 ERRS Discovery D212
967417CTD or STD cast1994-12-02 09:04:0016.74433 N, 61.61617 ERRS Discovery D212
967429CTD or STD cast1994-12-04 00:08:0017.2365 N, 61.5025 ERRS Discovery D212
1300781Water sample data1994-12-04 00:24:0017.23645 N, 61.50251 ERRS Discovery D212
967430CTD or STD cast1994-12-04 01:07:0017.2445 N, 61.51383 ERRS Discovery D212
966936CTD or STD cast1994-12-04 02:22:0017.269 N, 61.5125 ERRS Discovery D212
1300793Water sample data1994-12-04 02:46:0017.26895 N, 61.51249 ERRS Discovery D212
1868706Water sample data1994-12-04 02:46:0017.26895 N, 61.51249 ERRS Discovery D212
967442CTD or STD cast1994-12-04 04:26:0017.29167 N, 61.52767 ERRS Discovery D212
1300800Water sample data1994-12-04 06:07:0017.29169 N, 61.5276 ERRS Discovery D212
1868718Water sample data1994-12-04 06:07:0017.29169 N, 61.5276 ERRS Discovery D212
967454CTD or STD cast1994-12-04 09:03:0017.32667 N, 61.528 ERRS Discovery D212
967466CTD or STD cast1994-12-04 10:07:0017.34383 N, 61.5265 ERRS Discovery D212
967478CTD or STD cast1994-12-05 01:08:0017.54 N, 61.54967 ERRS Discovery D212
1300824Water sample data1994-12-05 01:27:0017.54001 N, 61.54969 ERRS Discovery D212
967491CTD or STD cast1994-12-05 08:08:0016.8965 N, 61.75067 ERRS Discovery D212
967509CTD or STD cast1994-12-06 00:34:0016.048 N, 61.98883 ERRS Discovery D212
1300836Water sample data1994-12-06 00:53:0016.04798 N, 61.9888 ERRS Discovery D212
967510CTD or STD cast1994-12-06 02:18:0016.0415 N, 61.99367 ERRS Discovery D212
1300848Water sample data1994-12-06 02:42:0016.04143 N, 61.99364 ERRS Discovery D212
1868731Water sample data1994-12-06 02:42:0016.04143 N, 61.99364 ERRS Discovery D212
967522CTD or STD cast1994-12-06 03:56:0016.05183 N, 61.99083 ERRS Discovery D212
1300861Water sample data1994-12-06 05:33:0016.05179 N, 61.9908 ERRS Discovery D212
1868743Water sample data1994-12-06 05:33:0016.05179 N, 61.9908 ERRS Discovery D212
967534CTD or STD cast1994-12-06 08:09:0016.0595 N, 61.9675 ERRS Discovery D212