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Metadata Report for BODC Series Reference Number 1668279


Metadata Summary

Data Description

Data Category Water sample data
Instrument Type
NameCategories
Non-toxic sea water supply  continuous water samplers
Instrument Mounting research vessel
Originating Country United Kingdom
Originator Dr Ian Joint
Originating Organization Plymouth Marine Laboratory
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) OMEX I
 

Data Identifiers

Originator's Identifier DI217_GPUMP_PIGX_3:
BODC Series Reference 1668279
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1995-10-03 17:32
End Time (yyyy-mm-dd hh:mm) 1995-10-18 04:50
Nominal Cycle Interval -
 

Spatial Co-ordinates

Southernmost Latitude 48.92061 N ( 48° 55.2' N )
Northernmost Latitude 49.59569 N ( 49° 35.7' N )
Westernmost Longitude 14.80681 W ( 14° 48.4' W )
Easternmost Longitude 10.04155 W ( 10° 2.5' W )
Positional Uncertainty Unspecified
Minimum Sensor or Sampling Depth 5.0 m
Maximum Sensor or Sampling Depth 5.0 m
Minimum Sensor or Sampling Height -
Maximum Sensor or Sampling Height -
Sea Floor Depth -
Sea Floor Depth Source -
Sensor or Sampling Distribution Unspecified -
Sensor or Sampling Depth Datum Unspecified -
Sea Floor Depth Datum Unspecified -
 

Parameters

BODC CODERankUnitsTitle
AADYAA011DaysDate (time from 00:00 01/01/1760 to 00:00 UT on day)
AAFDZZ011DaysTime (time between 00:00 UT and timestamp)
ALATGP011DegreesLatitude north relative to WGS84 by unspecified GPS system
ALONGP011DegreesLongitude east relative to WGS84 by unspecified GPS system
CPHLFLP11Milligrams 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 fluorometry
PHAEFLP11Milligrams per cubic metreConcentration of phaeopigments {pheopigments} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and fluorometry

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

Public domain 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.

The recommended acknowledgment is

"This study uses data from the data source/organisation/programme, provided by the British Oceanographic Data Centre and funded by the funding body."


Narrative Documents

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.

Pigments for cruises Charles Darwin CD85, RRS Discovery DI217 and Valdivia VLD137

Document History

Converted from CDROM documentation.

Content of data series

ACARHPP1 Alpha-carotene
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
ALLOHPP1 Alloxanthin
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
BCARHPP1 Beta-carotene
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
BUTAHPP1 Butanoyloxyfucoxanthin
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
C1C2HPP1 Chlorophyll-c1c2
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
CAROSSP1 Spectrophotometric carotenoid pigments (SCOR)
Spectrophotometric assay of acetone extraction (GF/F filtered)
milligrams/cubic metre
CHLBHPP1 Chlorophyll-b
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
CHLBSSP1 Spectrophotometric chlorophyll-b (SCOR)
Spectrophotometric assay of acetone extraction (GF/F filtered)
Nanograms per litre
CHLCSSP1 Spectrophotometric chlorophyll-c (SCOR)
Spectrophotometric assay of acetone extraction (GF/F filtered)
Nanograms per litre
CLC3HPP1 Chlorophyll-c3
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
CLPHHPP1 Chlorophyll-a plus phaeophorbides
HPLC assay of acetone extract (GF/F filtered)
milligrams/cubic metre
CPHLFLP1 Fluorometric chlorophyll-a
Fluorometric assay of acetone extract (GF/F filtered)
Milligrams/cubic metre
CPHLFLP4 Fluorometric chlorophyll-a
Fluorometric assay of acetone extraction (sum of size fractions >0.2 microns)
Milligrams/cubic metre
CPHLFMP1 Fluorometric chlorophyll-a
Fluorometric assay of methanol extract (GF/F filtered)
Milligrams/cubic metre
CPHLHPP1 HPLC chlorophyll-a
HPLC assay of acetone extract (GF/F filtered)
Milligrams/cubic metre
CPHLPR01 CTD chlorophyll
Calibrated in-situ fluorometer
Milligrams/cubic metre
CPHLPRTX Bench fluorometer chlorophyll
Bench fluorometer measurement on unfiltered water sample
Milligrams/cubic metre
CPHLSPP1 Spectrophotometric chlorophyll-a (Lorenzen)
Spectrophotometric assay of acetone extraction (GF/F filtered)
Milligrams/cubic metre
CPHLSSP1 Spectrophotometric chlorophyll-a (SCOR)
Spectrophotometric assay of acetone extraction (GF/F filtered)
Milligrams/cubic metre
CPHLSSPC Spectrophotometric chlorophyll-a (SCOR)
Spectrophotometric assay of acetone extraction (centrifuged)
Milligrams/cubic metre
DIADHPP1 Diadinoxanthin
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
DVCAHPP1 Diavinyl chlorophyll-a
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
FUCXHPP1 Fucoxanthin
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
HEXOHPP1 Hexanoyloxyfucoxanthin
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
LUTNHPP1 Lutein
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
PBA1HPP1 Phaeophorbide-a1
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
PBA2HPP1 Phaeophorbide-a2
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
PBA3HPP1 Phaeophorbide-a3
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
PERIHPP1 Peridinin
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
PHAEFLP1 Fluorometric phaeopigments
Fluorometric assay of acetone extract (GF/F filtered)
Milligrams/cubic metre
PHAEFLP4 Fluorometric phaeopigments
Fluorometric assay of acetone extract (sum of size fractions >0.2 microns)
Milligrams/cubic metre
PHAEFMP1 Fluorometric phaeopigments
Fluorometric assay of methanol extract (GF/F filtered)
Milligrams/cubic metre
PHAESPP1 Spectrophotometric phaeopigments (Lorenzen)
Spectrophotometric assay of acetone extract (GF/F filtered)
Milligrams/cubic metre
PTA1HPP1 Phaeophytin-a1
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
PTA2HPP1 Phaeophytin-a2
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre
SCHLFLPA Size-fractionated fluorometric chlorophyll-a
Fluorometric assay of acetone extract (>5 micron size fraction)
Milligrams/cubic metre
SCHLFLPB Size-fractionated fluorometric chlorophyll-a
Fluorometric assay of acetone extract (>2 micron size fraction)
Milligrams/cubic metre
SCHLFLPC Size-fractionated fluorometric chlorophyll-a
Fluorometric assay of acetone extract (2-5 micron size fraction)
Milligrams/cubic metre
SCHLFLPF Size-fractionated fluorometric chlorophyll-a
Fluorometric assay of acetone extract (0.2-2 micron size fraction)
Milligrams/cubic metre
SPHAFLPA Size-fractionated phaeopigments
Fluorometric assay of acetone extract (>5 micron size fraction)
Milligrams/cubic metre
SPHAFLPB Size-fractionated phaeopigments
Fluorometric assay of acetone extract (>2 micron size fraction)
Milligrams/cubic metre
SPHAFLPC Size-fractionated phaeopigments
Fluorometric assay of acetone extract (0.2-2 micron size fraction)
Milligrams/cubic metre
SPHAFLPF Size-fractionated phaeopigments
Fluorometric assay of acetone extract (>2 micron size fraction)
Milligrams/cubic metre
TCPEFLP1 Total chloroplastic pigment
Fluorometric assay of acetone extract (GF/F filtered)
Milligrams/cubic metre
ZEOXHPP1 Zeoxantin
HPLC assay of acetone extract (GF/F filtered)
Nanograms per litre

Data Originator

Dr Ian Joint, Plymouth Marine Laboratory, UK.

Sampling strategy and methodology

Samples were taken from CTD rosette Niskin bottles, GoFlo bottles deployed on a hydrographic (kevlar) wire or from the continuous pumped seawater supply.

Samples taken for chlorophyll determinations (1-2 litres) were filtered through Whatman GF/F filters. The filters were quickly frozen and returned, continuously frozen, to the laboratory for analysis. Back at the laboratory, the samples were extracted in 90% acetone for approximately 12 hours in the dark at 4 °C. In most cases the resulting extract was assayed spectrophotometrically for chlorophyll a and phaeopigments following the procedures outlined in Lorenzen and Jeffrey (1978). On Discovery 217, the extracts were assayed both spectrophotometrically and fluorometrically.

Additional samples were analysed for chlorophyll as part of the size-fractionated production experiments. Aliquots of 100-200 ml were filtered through a cascade of membrane filters (the pore sizes may be determined from the parameter codes). Usually, they were immediately extracted into 90% acetone and assayed fluorometrically on board ship but on occasions the filters were frozen and returned to the laboratory for analysis. The sums of the individual size fraction values have been computed and included in the database.

Comments on data quality

Cruise Discovery DI217

The CTD pressure sensor gave rise to problems during this cruise and for the first three stations only wire out data were available. Whilst every effort has been made to correct the pressure channel and accurately match bottle firing pressures, the possibility for error should be borne in mind by users of the data.

References

Barlow, R.G., Mantoura, R.F.C., Gough, M.A. and Fileman, T.W., 1993a. Pigment signatures of the phytoplankton composition in the north-east Atlantic during the 1990 spring bloom. Deep Sea Res. II, 40, 459-477.

Barlow, R.G., Mantoura, R.F.C., Gough, M.A. and Fileman, T.W., 1993b. Phaeopigment distribution during the 1990 spring bloom in the north-east Atlantic. Deep Sea Res. I, 40, 2229-2242.

Barlow, R.G., Cummings, D.G., Mantoura, R.F.C. and Fileman, T.W., 1996. Pigment chemotaxonomic distributions of phytoplankton during summer in the western Mediterranean. Deep Sea Res. II, in press.

Holm-Hansen, O., Lorenzen, C.J., Holmes, R.W. and Strictland, J.D.H., 1965. Fluorometric determination of chlorophyll. J. Con. perm. int. Explor. 30, 3-15.

Jeffrey, S.W. and Humphrey, G.F., 1975. New spectrophotometric equations for determining chlorophylls a, b, c1 and c2 in higher plants, algae and natural phytoplankton. Biochem. Physiol. Pflan., 167, 191-194.

Lorenzen, C.J., 1967. Determination of chlorophyll and phaeopigments: spectrophotometric equations. Limnology and Oceanography, 12.

Lorenzen, C.J. and Jeffrey, S.W., 1978. Determination of chlorophyll in seawater. UNESCO Techn. Paper Mar Sci, 35.

Strickland, J.D.H., Parsons, T.R. (1972). A practical handbook of seawater analysis. Fish. Res. Bd. Can.,.167-311.

Tahey, T.M., Duineveld, G.C.A., Berghuis, E.M. and Helder, W., 1994. Relation between sediment-water fluxes of oxygen and silicate and faunal abundance at continental shelf, slope and deep-water stations in the North West Mediterranean. Marine Ecology Progress Series, 104, 119-130.

Thomsen. L., Graf, G., Martens, V. and Steen, E., 1994. An instrument for sampling water from the bottom nepheloid layer. Contin. Shelf Res., 14, 871-882.

Thomsen, L. and Graf, G., 1995. Benthic boundary layer characteristics of the continental margin of the western Barents Sea. Oceanologica Acta, 17/6, 597-607.

Wright, S.W., Jeffrey, S.W., Mantoura, R.F.C., Llewellyn, C.A., Bjornland, T., Repeta, D. and Welschmeyer, N., 1991. Improved HPLC method for the analysis of chlorophylls and carotenoids from marine phytoplankton. Marine Ecology Progress Series, 77, 183-196.


Project Information

Ocean Margin EXchange (OMEX) I

Introduction

OMEX was a European multidisciplinary oceanographic research project that studied and quantified the exchange processes of carbon and associated elements between the continental shelf of western Europe and the open Atlantic Ocean. The project ran in two phases known as OMEX I (1993-1996) and OMEX II - II (1997-2000), with a bridging phase OMEX II - I (1996-1997). The project was supported by the European Union under the second and third phases of its MArine Science and Technology Programme (MAST) through contracts MAS2-CT93-0069 and MAS3-CT97-0076. It was led by Professor Roland Wollast from Université Libre de Bruxelles, Belgium and involved more than 100 scientists from 10 European countries.

Scientific Objectives

The aim of the Ocean Margin EXchange (OMEX) project was to gain a better understanding of the physical, chemical and biological processes occurring at the ocean margins in order to quantify fluxes of energy and matter (carbon, nutrients and other trace elements) across this boundary. The research culminated in the development of quantitative budgets for the areas studied using an approach based on both field measurements and modeling.

OMEX I (1993-1996)

The first phase of OMEX was divided into sub-projects by discipline:

  • Physics
  • Biogeochemical Cycles
  • Biological Processes
  • Benthic Processes
  • Carbon Cycling and Biogases

This emphasises the multidisciplinary nature of the research.

The project fieldwork focussed on the region of the European Margin adjacent to the Goban Spur (off the coast of Brittany) and the shelf break off Tromsø, Norway. However, there was also data collected off the Iberian Margin and to the west of Ireland. In all a total of 57 research cruises (excluding 295 Continuous Plankton Recorder tows) were involved in the collection of OMEX I data.

Data Availability

Field data collected during OMEX I have been published by BODC as a CD-ROM product, entitled:

  • OMEX I Project Data Set (two discs)

Further descriptions of this product and order forms may be found on the BODC web site.

The data are also held in BODC's databases and subsets may be obtained by request from BODC.


Data Activity or Cruise Information

Cruise

Cruise Name D217
Departure Date 1995-09-27
Arrival Date 1995-10-22
Principal Scientist(s)Richard Stephen Lampitt (Southampton Oceanography Centre)
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