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Metadata Report for BODC Series Reference Number 1300916

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:A5/2
BODC Series Reference 1300916

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1994-12-08 00:46
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval -

Spatial Co-ordinates

Latitude 11.99400 N ( 11° 59.6' N )
Longitude 64.49169 E ( 64° 29.5' E )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth 0.5 m
Maximum Sensor or Sampling Depth 79.5 m
Minimum Sensor or Sampling Height 4126.0 m
Maximum Sensor or Sampling Height 4205.0 m
Sea Floor Depth 4205.5 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
UREAAATX1Micromoles per litreConcentration of urea {CAS 57-13-6} 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) 1994-12-08
End Date (yyyy-mm-dd) 1994-12-08
Organization Undertaking ActivityPlymouth Marine Laboratory
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierDI212_CTD_A5/2
Platform Categorylowered unmanned submersible

BODC Sample Metadata Report for DI212_CTD_A5/2

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
69959   10.00       81.30   82.20   79.50 General Oceanics GO-FLO water sampler No problem reported    
69960   10.00       67.40   68.40   65.70 General Oceanics GO-FLO water sampler No problem reported    
69961   10.00       62.50   63.10   60.60 General Oceanics GO-FLO water sampler No problem reported    
69962   10.00       54.40   55.60   52.90 General Oceanics GO-FLO water sampler No problem reported    
69963   10.00       47.50   48.30   45.80 General Oceanics GO-FLO water sampler No problem reported    
69964   10.00       35.50   36.30   33.90 General Oceanics GO-FLO water sampler No problem reported    
69965   10.00       29.60   30.60   28.10 General Oceanics GO-FLO water sampler No problem reported    
71387   10.00       18.50   19.50   17.10 General Oceanics GO-FLO water sampler No problem reported    
80367   10.00         .50    1.50     .50 General Oceanics GO-FLO water sampler No problem reported    
80368   10.00       10.50   11.50    9.10 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 5 (A5)
CategoryOffshore location
Latitude12° 0.00' N
Longitude64° 30.00' E
Water depth below MSL4211.0 m

ARABESQUE - Arabian Sea Station 5 (A5)

Site A5 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 5 (A5)

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
965700CTD or STD cast1994-09-16 23:19:0011.98683 N, 64.48917 ERRS Discovery D210
1653858Water sample data1994-09-16 23:29:0011.9868 N, 64.48915 ERRS Discovery D210
965712CTD or STD cast1994-09-17 00:01:0011.97567 N, 64.483 ERRS Discovery D210
965724CTD or STD cast1994-09-17 00:48:0011.96617 N, 64.4735 ERRS Discovery D210
965736CTD or STD cast1994-09-17 04:00:0011.9295 N, 64.44767 ERRS Discovery D210
1851215Water sample data1994-09-17 04:29:0011.92955 N, 64.44769 ERRS Discovery D210
965748CTD or STD cast1994-09-17 05:49:0011.90067 N, 64.44133 ERRS Discovery D210
1851227Water sample data1994-09-17 06:53:0011.9006 N, 64.44129 ERRS Discovery D210
965761CTD or STD cast1994-09-17 10:08:0011.87317 N, 64.43233 ERRS Discovery D210
965773CTD or STD cast1994-09-17 11:04:0011.86017 N, 64.42333 ERRS Discovery D210
965785CTD or STD cast1994-09-17 12:17:0011.86583 N, 64.407 ERRS Discovery D210
967085CTD or STD cast1994-12-08 00:06:0011.994 N, 64.49167 ERRS Discovery D212
967097CTD or STD cast1994-12-08 03:06:0011.99317 N, 64.49483 ERRS Discovery D212
1300928Water sample data1994-12-08 03:25:0011.99325 N, 64.49489 ERRS Discovery D212
967104CTD or STD cast1994-12-08 05:01:0011.99383 N, 64.486 ERRS Discovery D212
1300941Water sample data1994-12-08 06:34:0011.9938 N, 64.48592 ERRS Discovery D212
1868780Water sample data1994-12-08 06:34:0011.9938 N, 64.48592 ERRS Discovery D212
967024CTD or STD cast1994-12-08 09:20:0012.01067 N, 64.47233 ERRS Discovery D212
1868792Water sample data1994-12-08 09:32:0012.01063 N, 64.47232 ERRS Discovery D212
967116CTD or STD cast1994-12-08 10:21:0011.986 N, 64.47583 ERRS Discovery D212
1868811Water sample data1994-12-08 10:47:0011.98605 N, 64.47584 ERRS Discovery D212
966900CTD or STD cast1994-12-08 11:34:0011.98633 N, 64.46917 ERRS Discovery D212