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Metadata Report for BODC Series Reference Number 1890527


Metadata Summary

Data Description

Data Category Water sample data
Instrument Type
NameCategories
Niskin bottle  discrete water samplers
Instrument Mounting lowered unmanned submersible
Originating Country Spain
Originator Dr Emilio Fernandez Suarez
Originating Organization University of Vigo Department of Ecology and Animal Biology
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) Atlantic Meridional Transect (AMT)
 

Data Identifiers

Originator's Identifier AMT11_CTD_PIGX_173:AMT11-15
BODC Series Reference 1890527
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2000-09-21 10:51
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval -
 

Spatial Co-ordinates

Latitude 21.95335 N ( 21° 57.2' N )
Longitude 20.99886 W ( 20° 59.9' W )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth 4.7 m
Maximum Sensor or Sampling Depth 80.7 m
Minimum Sensor or Sampling Height 4234.1 m
Maximum Sensor or Sampling Height 4310.1 m
Sea Floor Depth 4314.8 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
 

Parameters

BODC CODERankUnitsTitle
ADEPZZ011MetresDepth (spatial coordinate) relative to water surface in the water body
ALLOHPP11Nanograms per litreConcentration of alloxanthin {CAS 28380-31-6} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
BBCAHPP11Nanograms per litreConcentration of beta,beta-carotene {beta-carotene CAS 7235-40-7} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
BECAHPP11Nanograms per litreConcentration of beta,epsilon-carotene {alpha-carotene CAS 432-70-2} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
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)
C2MEHPC11Nanograms per litreConcentration of chlorophyll-c2 monogalactosyldiacylglyceride ester (C. polylepis type) {Chl-c2-MGDG (14:0/14:0)} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
C2MEHPE11Nanograms per litreConcentration of chlorophyll-c2 monogalactosyldiacylglyceride ester (E. huxleyi type) {Chl-c2-MGDG (18:4/14:0)} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
CBDVHPP11Nanograms per litreConcentration of chlorophyll-b+divinyl chlorophyll-b {chl-b+DVchl-b} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
CLAAHPP11Nanograms per litreConcentration of chlorophyll-a allomer per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
CLAEHPP11Nanograms per litreConcentration of chlorophyll-a epimer per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
CLC2HPP11Nanograms per litreConcentration of chlorophyll-c2 {chl-c2} 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)
CPHLFLP41Milligrams per cubic metreConcentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >0.2um phase] by filtration, acetone extraction and fluorometry and summation of size-fractionated values
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)
K4HXHPP11Nanograms per litreConcentration of 4-keto-hexanoylfucoxanthin per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
LUTNHPP11Nanograms per litreConcentration of lutein {CAS 127-40-2} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
MDVPHPP11Nanograms per litreConcentration of Mg-2,4-divinyl pheoporphyrin a5 monomethyl ester per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
MVC3HPP11Nanograms per litreConcentration of monovinyl chlorophyll-c3 per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
NEOXHPP11Nanograms per litreConcentration of neoxanthin {CAS 30743-41-0} 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)
PRSXHPP11Nanograms per litreConcentration of prasinoxanthin {CAS 94705-97-2} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
SAMPRFNM1DimensionlessSample reference number
SCHLFLPB1Milligrams per cubic metreConcentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >2um phase] by filtration, acetone extraction and fluorometry
SCHLFLPF1Milligrams per cubic metreConcentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate 0.2-2um phase] by filtration, acetone extraction and fluorometry
VILXHPP11Nanograms per litreConcentration of violaxanthin {CAS 126-29-4} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC)
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

Niskin Bottle

The Niskin bottle is a device used by oceanographers to collect subsurface seawater samples. It is a plastic bottle with caps and rubber seals at each end and is deployed with the caps held open, allowing free-flushing of the bottle as it moves through the water column.

Standard Niskin

The standard version of the bottle includes a plastic-coated metal spring or elastic cord running through the interior of the bottle that joins the two caps, and the caps are held open against the spring by plastic lanyards. When the bottle reaches the desired depth the lanyards are released by a pressure-actuated switch, command signal or messenger weight and the caps are forced shut and sealed, trapping the seawater sample.

Lever Action Niskin

The Lever Action Niskin Bottle differs from the standard version, in that the caps are held open during deployment by externally mounted stainless steel springs rather than an internal spring or cord. Lever Action Niskins are recommended for applications where a completely clear sample chamber is critical or for use in deep cold water.

Clean Sampling

A modified version of the standard Niskin bottle has been developed for clean sampling. This is teflon-coated and uses a latex cord to close the caps rather than a metal spring. The clean version of the Levered Action Niskin bottle is also teflon-coated and uses epoxy covered springs in place of the stainless steel springs. These bottles are specifically designed to minimise metal contamination when sampling trace metals.

Deployment

Bottles may be deployed singly clamped to a wire or in groups of up to 48 on a rosette. Standard bottles have a capacity between 1.7 and 30 L, while Lever Action bottles have a capacity between 1.7 and 12 L. Reversing thermometers may be attached to a spring-loaded disk that rotates through 180° on bottle closure.

AMT1-6 and 11 size-fractionated extracted chlorophyll-a measured fluorometrically from CTD bottle samples

Data Acquisition and Analysis

These data originate from analyses on samples collected from CTD rosette bottles and the measurements were made concurrently with the depths sampled for the primary production (14C) incubations carried out during each cruise.

Water samples from the 5-7 main light depths were collected from CTD bottles. For AMT1 all samples were filtered through 0.2 µm filters only. For AMTs 2-6 and 11 size-fractionated chlorophyll-a concentrations were determined fluorometrically after sequential filtration of a 200 - 300 ml seawater sample through 20 µm, 2 µm and 0.2 µm polycarbonate filters. All filters were placed in 90% acetone at -20°C for pigment extraction.

Instrumentation Description

Turner Designs 10-AU fluorometer

BODC Data Processing Procedures

Data were submitted to BODC in an Excel spreadsheet with the Primary Production incubation data and were saved to the BODC archive with reference UVI020056. Sample metadata provided (CTD cast, latitude and depth) were checked against information held in the database. There were no discrepancies.

Where chl-a values were provided with no size fractioned data, the data were loaded under a separate parameter for total chl-a collected on a 0.2 µm filter, not a summation of different filter sizes.

Parameter codes defined in BODC parameter dictionary were assigned to the variable. The units supplied in the spreadsheet were mg m-3, which match the Parameter Dictionary units so no unit conversions were necessary.

Data loaded into BODC's database without any changes applied.

A parameter mapping table is provided below;

Originator's Parameter Units Description BODC Parameter Code Units Comments
Chl 0.2-2 µm mg m-3 Concentration of chlorophyll-a {chl-a} per unit volume of the water body [particulate 0.2-2µm phase] by filtration, acetone extraction and fluorometry SCHLFLPF mg m-3 n/a
Chl 2-20 µm mg m-3 Concentration of chlorophyll-a {chl-a} per unit volume of the water body [particulate 0.2-2µm phase] by filtration, acetone extraction and fluorometry SCHLFLPG mg m-3 n/a
Chl >20 µm mg m-3 Concentration of chlorophyll-a {chl-a} per unit volume of the water body [particulate >20µm phase] by filtration, acetone extraction and fluorometry SCHLFLPQ mg m-3 n/a
Chlorophyll-a mg m-3 Concentration of chlorophyll-a {chl-a} per unit volume of the water body [particulate >0.2µm phase] by filtration, acetone extraction, fluorometry and summation of size-fractionated values CPHLFLP4 mg m-3 n/a
Chl >2 µm mg m-3 Concentration of chlorophyll-a {chl-a} per unit volume of the water body [particulate >2µm phase] by filtration, acetone extraction and fluorometry SCHLFLPB mg m-3 n/a
Chl >0.2 µm mg m-3 Concentration of chlorophyll-a {chl-a} per unit volume of the water body [particulate >0.2µm phase] by filtration, acetone extraction and fluorometry CPHLFLP5 mg m-3 n/a

Data Quality Report

BODC were not advised of any data quality checks made by the data originator prior to submission of the dataset.

Problem Report

Not relevant to this dataset.

AMT11 pigment composition by HPLC analysis (CTD bottles)

Data Acquisition and Analysis

For vertical profiling samples were taken from five depths down to 250 m and 1.5-3 litres were filtered through 0.2 µm glass fibre filters. Pigment samples were stored at -80 oC until analysis by HPLC. Pigments were extracted in acetone using ultrasonication, and centrifugation to remove debris, and analysed using the method of Barlow et al. (1997).

References Cited

Barlow R.G. , Cummings D.G. and Gibb S.W., 1997. Improved resolution of mono- and divinyl chlorophylls a and b and zeaxanthin and lutein in phytoplankton extracts using reverse phase C8 HPLC. Marine Ecology Progress Series, 161 , 303-307.

Instrumentation Description

Section not relevant.

BODC Data Processing Procedures

Data were submitted to BODC in Microsoft Excel spreadsheet format and saved to the BODC archive with reference PML030067. The file was provided to BODC with CTD cast number and depth as metadata. Sample metadata were checked against information held in the database - there were no discrepancies.

There were three samples provided with null data values for all pigments (cast 7 depth 70 m; cast 27 depth 80 m; cast 46 depth 80 m). It was unclear if these were measured null values or no data because of a lost filter and these data were not loaded to the database.

The data were provided in units of micrograms per litre. The units associated with the parameter codes in the BODC Parameter Dictionary were nanograms per litre, with the exception of chlorophyll-a which was in units of milligrams per cubic metre. All data had a unit conversion factor applied (x 1000) except the chl-a data where the units are equivalent.

Parameter codes defined in BODC parameter dictionary were assigned to the variables as shown in the table below.

Data loaded into BODC's database without any changes.

Originator's Parameter Units Description BODC Parameter Code Units Comments
Chl c3 µg l-1 Concentration of chlorophyll-c3 {chl-c3} per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) CLC3HPP1 ng l-1 Unit conversion applied (x 1000)
Chl c2 µg l-1 Concentration of chlorophyll-c2 {chl-c2} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) CLC2HPP1 ng l-1 Unit conversion applied (x 1000)
Perid µg l-1 Concentration of peridinin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) PERIHPP1 ng l-1 Unit conversion applied (x 1000)
Butfuco µg l-1 Concentration of 19'-butanoyloxyfucoxanthin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) BUTAHPP1 ng l-1 Unit conversion applied (x 1000)
Fuco µg l-1 Concentration of fucoxanthin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) FUCXHPP1 ng l-1 Unit conversion applied (x 1000)
Hexfuco µg l-1 Concentration of 19'-hexanoyloxyfucoxanthin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) HEXOHPP1 ng l-1 Unit conversion applied (x 1000)
Viola µg l-1 Concentration of violaxanthin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) VILXHPP1 ng l-1 Unit conversion applied (x 1000)
Diadino µg l-1 Concentration of diadinoxanthin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) DIADHPP1 ng l-1 Unit conversion applied (x 1000)
Allo µg l-1 Concentration of alloxanthin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) ALLOHPP1 ng l-1 Unit conversion applied (x 1000)
Prasino µg l-1 Concentration of prasinoxanthin per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) PRSXHPP1 ng l-1 Unit conversion applied (x 1000)
Zea µg l-1 Concentration of zeaxanthin per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) ZEOXHPP1 ng l-1 Unit conversion applied (x 1000)
Lut µg l-1 Concentration of lutein per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) LUTNHPP1 ng l-1 Unit conversion applied (x 1000)
DV Chl b + Chl b µg l-1 Concentration of chlorophyll-b+divinyl chlorophyll-b per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) CBDVHPP1 ng l-1 Unit conversion applied (x 1000)
Neo µg l-1 Concentration of neoxanthin per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) NEOXHPP1 ng l-1 Unit conversion applied (x 1000)
DV Chl a µg l-1 Concentration of divinyl chlorophyll-a per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) DVCAHPP1 ng l-1 Unit conversion applied (x 1000)
4keto- Hexfuco µg l-1 Concentration of 4-keto-hexanoylfucoxanthin per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) K4HXHPP1 ng l-1 Unit conversion applied (x 1000)
β,β-Caro µg l-1 Concentration of beta,beta-carotene per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) BBCAHPP1 ng l-1 Unit conversion applied (x 1000)
β,epsilon-Caro µg l-1 Concentration of beta,epsilon-carotene per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) BECAHPP1 ng l-1 Unit conversion applied (x 1000)
MgDVP µg l-1 Concentration of Mg-2,4-divinyl pheoporphyrin a5 monomethyl ester per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) MDVPHPP1 ng l-1 Unit conversion applied (x 1000)
Chl a allom µg l-1 Concentration of chlorophyll-a allomer per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) CLAAHPP1 ng l-1 Unit conversion applied (x 1000)
Chla epim µg l-1 Concentration of chlorophyll-a epimer per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) CLAEHPP1 ng l-1 Unit conversion applied (x 1000)
Chlc2-MGDG (C.polylepis) µg l-1 Concentration of chlorophyll-c2 monogalactosyldiacylglyceride ester (C. polylepsis type) per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) C2MEHPC1 ng l-1 Unit conversion applied (x 1000)
Chlc2-MGDG (E.huxleyi) µg l-1 Concentration of chlorophyll-c2 monogalactosyldiacylglyceride ester (E. huxleyi type) per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) C2MEHPE1 ng l-1 Unit conversion applied (x 1000)
MVChl c3 µg l-1 Concentration of monovinyl chlorophyll-c3 per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) MVC3HPP1 ng l-1 Unit conversion applied (x 1000)
Chl a µg l-1 Concentration of chlorophyll-a {chl-a} per unit volume of the water column [particulate >GF/F phase] by filtration, acetone extraction and high performance liquid chromatography (HPLC) CPHLHPP1 mg m-3 -

Data Quality Report

BODC were not advised by the data originator of any quality control processes applied to the data set.

Problem Report

This section is not relevant to this data set.


Project Information

The Atlantic Meridional Transect (AMT) - Phase 1 (1995-2000)

Who was involved in the project?

The Atlantic Meridional Transect (AMT) programme was designed by and implemented as a collaboration between Plymouth Marine Laboratory (PML) and Southampton Oceanography Centre (SOC). The programme was hosted by Plymouth Marine Laboratory and involved additional researchers from UK and international universities throughout its duration.

What was the project about?

When AMT began in 1995 the programme provided a platform for international scientific collaboration, including the calibration and validation of SeaWiFs measurements and products. The programme provided an exceptional opportunity for nationally and internationally driven collaborative research and provided a platform for excellent multi-disciplinary oceanographic research. As an in situ observation system, the data collected by the AMT consortium informed on changes in biodiversity and function of the Atlantic ecosystem during this period of rapid change to our climate and biosphere.

The scientific aims were to assess:

  • mesoscale to basin scale phytoplankton processes
  • the functional interpretation of bio-optical signatures
  • the seasonal, regional and latitudinal variations in mesozooplankton dynamics

When was the project active?

The first phase of the AMT programme ran from 1995 to 2000 and consisted of a total of 12 cruises. A second phase of funding allowed the project to continue for the period 2002 to 2006 with a further 6 cruises.

Brief summary of the project fieldwork/data

The AMT programme undertook biological, chemical and physical oceanographic research during the annual return passage of the RRS James Clark Ross between the UK and the Falkland Islands or the RRS Discovery between the UK and Cape Town, a distance of up to 13,500 km. This transect crossed a range of ecosystems from sub-polar to tropical and from euphotic shelf seas and upwelling systems to oligotrophic mid-ocean gyres. The transect route was covered north-south in September/October and south-north in April/May of each year.

The measurements of hydrographic and bio-optical properties, plankton community structure and primary production completed on the first 12 transects (1995-2000) represent the most coherent set of repeated biogeochemical observations over ocean basin scales. This unique dataset has led to several important discoveries concerning the identification of oceanic provinces, validation of ocean colour algorithms, distributions of picoplankton, identifying new regional sinks of pCO2 and variability in rates of primary production and respiration.

Who funded the project?

The programme was funded by the Natural Environment Research Council (NERC) and further support was received from the National Aeronautics and Space Administration (NASA) with equipment and funding from the Sea-viewing Wild Field-of-view Sensor (SeaWiFS) project.


Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 2000-09-21
End Date (yyyy-mm-dd) 2000-09-21
Organization Undertaking ActivityPlymouth Marine Laboratory
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierAMT11_CTD_AMT11-15
Platform Categorylowered unmanned submersible

BODC Sample Metadata Report for AMT11_CTD_AMT11-15

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
505990        250.70  251.50  249.90 Niskin bottle No problem reported    
505991         80.10   81.40   80.70 Niskin bottle No problem reported    
505992         60.20   61.10   60.80 Niskin bottle No problem reported    
506083         29.00   30.40   30.00 Niskin bottle No problem reported    
506159        140.70  141.70  140.80 Niskin bottle No problem reported    
506376         53.30   54.00   53.80 Niskin bottle No problem reported    
506377         45.60   46.50   46.30 Niskin bottle No problem reported    
506378         40.60   41.60   41.30 Niskin bottle No problem reported    
506379          3.80    4.60    4.70 Niskin bottle 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 JR20000912 (AMT11, JR52 Leg1, JR53)
Departure Date 2000-09-12
Arrival Date 2000-10-11
Principal Scientist(s)E Malcolm S Woodward (Plymouth Marine Laboratory)
Ship RRS James Clark Ross

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: AMT11_CTD_AMT11-15

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
1095627Water sample data2000-09-21 10:51:0021.95335 N, 20.99886 WRRS James Clark Ross JR20000912 (AMT11, JR52 Leg1, JR53)
1632866Water sample data2000-09-21 10:51:0021.95335 N, 20.99886 WRRS James Clark Ross JR20000912 (AMT11, JR52 Leg1, JR53)
1853246Water sample data2000-09-21 10:51:0021.95335 N, 20.99886 WRRS James Clark Ross JR20000912 (AMT11, JR52 Leg1, JR53)