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Metadata Report for BODC Series Reference Number 1664506


Metadata Summary

Data Description

Data Category Water sample data
Instrument Type
NameCategories
General Oceanics GO-FLO water sampler  discrete water samplers
Instrument Mounting lowered unmanned submersible
Originating Country United Kingdom
Originator Dr Ray Barlow
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_PIGX_5:GOM5/3
BODC Series Reference 1664506
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1994-11-20 06:54
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval -
 

Spatial Co-ordinates

Latitude 22.65323 N ( 22° 39.2' N )
Longitude 60.67957 E ( 60° 40.8' E )
Positional Uncertainty Unspecified
Minimum Sensor or Sampling Depth 5.6 m
Maximum Sensor or Sampling Depth 81.5 m
Minimum Sensor or Sampling Height 3079.1 m
Maximum Sensor or Sampling Height 3155.0 m
Sea Floor Depth 3160.6 m
Sea Floor Depth Source -
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
 

Parameters

BODC CODERankUnitsTitle
ADEPZZ011MetresDepth (spatial coordinate) relative to water surface in the water body
BOTTFLAG1Not applicableSampling process quality flag (BODC C22)
BUTAHPP11Nanograms per litreConcentration of 19'-butanoyloxyfucoxanthin per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
C1C2HPP11Nanograms per litreConcentration of chlorophyll-c1+c2 per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
CHLBHPP11Nanograms per litreConcentration of chlorophyll-b {chl-b CAS 519-62-0} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
CLC3HPP11Nanograms per litreConcentration of chlorophyll-c3 {chl-c3} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
CPHLHPP11Milligrams per cubic metreConcentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
DIADHPP11Nanograms per litreConcentration of diadinoxanthin {CAS 18457-54-0} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
DVCAHPP11Nanograms per litreConcentration of divinyl chlorophyll-a {DVchl-a} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
FUCXHPP11Nanograms per litreConcentration of fucoxanthin {CAS 3351-86-8} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
HEXOHPP11Nanograms per litreConcentration of 19'-hexanoyloxyfucoxanthin {CAS 60147-85-5} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
PERIHPP11Nanograms per litreConcentration of peridinin {CAS 33281-81-1} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
SAMPRFNM1DimensionlessSample reference number
ZEOXHPP11Nanograms per litreConcentration of zeaxanthin {CAS 144-68-3} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)

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 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

Pigments as part of the ARABESQUE project

Parameter Code Definitions

CPHLFLP1 Fluorometric chlorophyll-a µg/litre
Fluorometric assay of acetone extract (GF/F filtered)
CPHLHPP1 HPLC chlorophyll a µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
CPHLPR01 Calibrated CTD chlorophyll µg/litre
Aquatrakka fluorometer calibrated against HPLC samples
ALLOHPP1 Alloxanthin µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
BUTAHPP1 Butanoyloxyfucoxanthin µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
C1C2HPP1 Chlorophyll c1c2 µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
CHLBHPP1 Chlorophyll b µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
CLC3HPP1 Chlorophyll c3 µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
DIADHPP1 Diadinoxanthin µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
DVCAHPP1 Diavinyl chlorophyll a µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
FUCXHPP1 Fucoxanthin µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
HEXOHPP1 Hexanoyloxyfucoxanthin µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
PBA1HPP1 Phaeophorbide-a1 µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
PBA2HPP1 Phaeophorbide-a2 µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
PBA3HPP1 Phaeophorbide-a3 µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
PBA4HPP1 Phaeophorbide-a4 µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
PERIHPP1 Peridinin µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
PTA1HPP1 Phaeophytin-a1 µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
PTA2HPP1 Phaeophytin-a2 µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)
ZEOXHPP1 Zeaxanthin µg/litre
Reverse-phase HPLC assay of acetone extract (GF/F filtered)

Originator Code Definitions

5 Dr R. Barlow Plymouth Marine Laboratory

Originator Protocols

Samples of one to two litres were taken from all shallow biogeochemistry CTD casts, filtered onto GF/F filters and immediately frozen in liquid nitrogen. The filters were extracted into 90% acetone, an aliquot was taken and injected onto a C-8 reverse phase column for high pressure liquid chromatographic (HPLC) separation and quantification of some 20 chlorophyll and carotenoid pigments, using both absorbance at 440nm and fluorescence (excitation at 405nm, emission at 670nm) detection.

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

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).

Objectives

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.

Fieldwork

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) 1994-11-20
End Date (yyyy-mm-dd) 1994-11-20
Organization Undertaking ActivityPlymouth Marine Laboratory
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierDI212_CTD_GOM5/3
Platform Categorylowered unmanned submersible

BODC Sample Metadata Report for DI212_CTD_GOM5/3

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
69344   10.00      202.60  203.20  199.70 General Oceanics GO-FLO water sampler No problem reported    
69345   10.00      153.00  153.90  150.60 General Oceanics GO-FLO water sampler No problem reported    
69346   10.00      102.80  104.20  101.00 General Oceanics GO-FLO water sampler No problem reported    
69347   10.00       83.30   84.40   81.50 General Oceanics GO-FLO water sampler No problem reported    
69348   10.00       63.30   64.40   61.60 General Oceanics GO-FLO water sampler No problem reported    
69349   10.00       53.60   54.50   51.90 General Oceanics GO-FLO water sampler No problem reported    
69350   10.00       43.00   44.20   41.50 General Oceanics GO-FLO water sampler No problem reported    
69351   10.00       33.60   34.20   31.90 General Oceanics GO-FLO water sampler No problem reported    
69352   10.00       23.30   24.30   21.80 General Oceanics GO-FLO water sampler No problem reported    
69353   10.00       18.30   19.20   16.80 General Oceanics GO-FLO water sampler No problem reported    
69354   10.00       13.10   14.00   11.70 General Oceanics GO-FLO water sampler No problem reported    
69355   10.00        7.10    7.90    5.60 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.

Related Data Activity activities are detailed in Appendix 1

Cruise

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


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
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: DI212_CTD_GOM5/3

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
1868976Water sample data1994-11-20 06:54:0022.65323 N, 60.67957 ERRS Discovery D212