Metadata Report for BODC Series Reference Number 1653060
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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Parameters |
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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
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.
Non-toxic (underway) sea water supply
A source of uncontaminated near-surface (commonly 3 to 7 m) seawater pumped continuously to shipboard laboratories on research vessels. There is typically a temperature sensor near the intake (known as the hull temperature) to provide measurements that are as close as possible to the ambient water temperature. The flow from the supply is typically directed through continuously logged sensors such as a thermosalinograph and a fluorometer. Water samples are often collected from the non-toxic supply. The system is also referred to as the underway supply.
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:
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Upwelling of nutrients and the resultant production and fate of phytoplankton, in terms of size-fractionated, new and regenerated production
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Vertical and on-shelf gradients of heterotrophic, methanogenic and denitrifying bacteria
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Distribution of chemotaxonomic pigments with links to optical properties of seawater
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The Dissolved Inorganic and Organic Carbon cycle
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Air-sea exchange of Sulphur and Nitrogen biogases including dimethyl sulphide, methylamines and methane
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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;
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One section along the Gulf of Oman
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A section at 8°N 67°E to 14° 30N 67°E
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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
Cruise
Cruise Name | D210 |
Departure Date | 1994-08-25 |
Arrival Date | 1994-10-05 |
Principal Scientist(s) | R Fauzi C Mantoura (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 |
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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 |