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Metadata Report for BODC Series Reference Number 2050250


Metadata Summary

Data Description

Data Category Water sample data
Instrument Type
NameCategories
Niskin bottle  discrete water samplers
Turner Designs Trilogy fluorometer  bench fluorometers
WET Labs {Sea-Bird WETLabs} ECO FLNTU(RT) combined fluorometer and turbidity sensor  fluorometers; optical backscatter sensors
Instrument Mounting lowered unmanned submersible
Originating Country United Kingdom
Originator Dr Stuart Painter
Originating Organization National Oceanography Centre, Southampton
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) SOLSTICE-WIO
 

Data Identifiers

Originator's Identifier AP06_CTD_PIGX_239:CTD_AP06_003
BODC Series Reference 2050250
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2019-06-30 11:46
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval -
 

Spatial Co-ordinates

Latitude 4.99260 S ( 4° 59.6' S )
Longitude 39.40230 E ( 39° 24.1' E )
Positional Uncertainty 0.0 to 0.01 n.miles
Minimum Sensor or Sampling Depth 5.0 m
Maximum Sensor or Sampling Depth 150.0 m
Minimum Sensor or Sampling Height 405.8 m
Maximum Sensor or Sampling Height 550.8 m
Sea Floor Depth 555.8 m
Sea Floor Depth Source GEBCO1401
Sensor or Sampling Distribution Unspecified -
Sensor or Sampling Depth Datum Unspecified -
Sea Floor Depth Datum Chart reference - Depth extracted from available chart
 

Parameters

BODC CODERankUnitsTitle
ADEPZZ011MetresDepth (spatial coordinate) relative to water surface in the water body
BOTTFLAG1Not applicableSampling process quality flag (BODC C22)
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
CPHLPS011Milligrams per cubic metreConcentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >unknown phase] by in-situ chlorophyll fluorometer and calibration against sample data
FIRSEQID1DimensionlessBottle firing sequence number
ROSPOSID1DimensionlessBottle rosette position identifier
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
SCHLFLPO1Milligrams per cubic metreConcentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >10um phase] by filtration, acetone extraction and fluorometry
SCHLFLPQ1Milligrams per cubic metreConcentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >20um phase] by filtration, acetone extraction and fluorometry

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

Sustainable Oceans, Livelihoods and food Security Through Increased Capacity in Ecosystem research in the Western Indian Ocean (SOLSTICE-WIO)

Access to these data is currently restricted to the consortium Principal Investigators and consortium co-workers.

Anyone granted permission to use the data during this period of restriction must acknowledge the data originator on any resulting papers.

Co-authorship contact:

Dr Stuart Painter at National Oceanography Centre (NOC), Southampton(NOCS)


Data Policy

Sustainable Oceans, Livelihoods and food Security Through Increased Capacity in Ecosystem research in the Western Indian Ocean (SOLSTICE-WIO) Data Policy

Data resulting from Natural Environment Research Council (NERC) funding through the SOLSTICE-WIO project are subject to the following Data Policy.

  • Data are to be placed under an initial embargo period, not longer than 2 years after collection. This is with the exception of samples data that will be placed under an initial embargo, not longer than 2 years after submission to BODC. This is to facilitate temporary protection of datasets whilst they are worked on by scientists or students.
  • Datasets under embargo are not accessible outside of the project, unless permission is granted by the PI.
  • Shipboard data (e.g. CTD, LADCP) should be submitted to BODC within 6 months of the cruise end.
  • Sample/Bottle data (e.g. Chlorophyll-a, Nutrients) are to be submitted within 6 months of finalising the dataset.
  • All SOLSTICE-WIO PhD student data are restricted to use by project PhD students until December 2021.
  • Metadata will be made publicly available to download via the BODC website during the embargo periods but the data itself will not be accessible.

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 and Lever Action bottles have a capacity between 1.7 and 30 L. Reversing thermometers may be attached to a spring-loaded disk that rotates through 180° on bottle closure.

Turner Designs Trilogy Fluorometer

The Trilogy Laboratory Fluorometer is a compact laboratory instrument for making fluorescence, absorbance and turbidity measurements using the appropriate snap-in Application Module.

The following snap-in application modules are available:

Application Minimum Detection Limit Linear Range Comments
Ammonium 0.05µmol 0-50µmol  
CDOM/FDOM 0.1 ppb 0 - 1000 ppb Quinine sulphate
Chlorophyll-a extracted (acidification) 0.025 µg l-1 0-300 µg l-1  
Chlorophyll-a extracted (non-acidification) 0.025 µg l-1 0-300 µg l-1  
Chlorophyll in vivo 0.025 µg l-1 0-300 µg l-1  
Fluorescein dye standard range 0.01 ppb 0-200 ppb  
Fluorescein dye extended range 0.75 ppb 0-8000 ppb Minicell adapter P/N 8000-936 and P/N 7000-950 required
Histamine 0.001 ppm 0-100 ppm  
Histamine (PTSA) 0.5 ppm 0-2,000 ppm  
Nitrate (absorbance) 0.04 mg l-1 0 - 14 mg l-1  
Crude Oil 0.2 ppb 0 - 2,000 ppb Quinine sulphate
Refined Oil 0.25 ppb 0 - 6,000 ppb Napthalene 1,5 Naphthalene disulfonic disodium salt
Optical Brighteners 1 ppb 0 - 10,000 ppb Quinine sulphate
Phosphate (absorbance) 1 µg l-1 0 - 930 µg l-1  
Phycocyanin (freshwater) 150 cells ml-1 0 - 150,000 cells ml-1  
Phycoerythrin (marine) 150 cells ml-1 0 - 150,000 cells ml-1  
Pyrene tetra sulfonic acid (PTSA) 0.1 ppb >10,000 ppb  
Rhodamine WT 0.01 ppb 0 - 500 ppb  
Silicate (absorbance) 3 µg l-1 0 - 3000 µg l-1  
Turbidity 0.05 NTU 0 - 1000 NTU  

For extracted chlorophyll measurements using EPA 445, Trilogy automatically calculates the concentration using the filtered and solvent volumes. The turbidity modules use an IRLED with a wavelength of 860nm to meet ISO 7027 standards for turbidity water quality measurements.

Specifications

Power 100 to 240VAC Universal Power Supply, Output 12VDC 0.84A Max
Operating Temperature 15-40 °C
Size 32.82 cm depth, 26.52 cm width, 21.39 height
Weight 3.65 kg
Readout Direct concentration (µg l-1, ppb etc.)
Light source and detector Light emitting diode and photodiode
Data output 100% ASCII format through a 9-pin RS-232 serial cable at 9600 baud
PC operating system Windows 98 or later

Further details can be found in the manufacturer's specification sheet.

WETLabs ECO FLNTU fluorescence and turbidity sensor

The Environmental Characterization Optics (ECO) Fluorometer and Turbidity (FLNTU) sensor is a dual wavelength, single-angle instrument that simultaneously determines chlorophyll fluorescence and turbidity. It is easily integrated in CTD packages and provides a reliable turbidity measurement that is not affected by Colored Dissolved Organic Matter (CDOM) concentration.

The FLNTU can operate continuously or periodically and has two different types of connectors to output the data. There are 5 other models that operate the same way as this instrument but have slight differences, as stated below:

  • FLNTU(RT) - has an analog an RS-232 serial output and operates continuously, when power is supplied
  • FLNTU(RT)D - similar to the FLNTU(RT) but has a depth rating of 6000 m
  • FLNTUB - has internal batteries for autonomous operation
  • FLNTUS - has an integrated anti-fouling bio-wiper
  • FLNTUSB - has the same characteristics as the FLNTUS but with internal batteries for autonomous operation

Specifications

Temperature range 0 to 30°C
Depth rating

600 m (standard)

6000 m (deep)

Turbidity
Wavelength 700 nm
Sensitivity 0.01 NTU
Typical range 0.01 to 25 NTU
Fluorescence
Wavelength 470 nm (excitation), 695 nm (emission)
Sensitivity 0.01 µg L-1
Typical range 0.01 to 50 µg L-1
Linearity 99% R2

Further details can be found in the manufacturer's specification sheet.

SOLSTICE-WIO AP06 CTD sensor measurements at bottle firing during up-cast

Originator's Protocol for Data Acquisition and Analysis

A total of 43 CTD casts were performed using a Seabird 19+ CTD system coupled to a stainless steel SBE55 rosette sampler fitted with six 6L Niskin bottles. The rosette system was further equipped with turbidity, chlorophyll fluorescence and dissolved oxygen sensors. Sampling was carried out at standard depths of 150, 100, 75, 50, 25 and 5 meters.

CTD Data were logged to a computer during deployment. Data were processed using seabird software and Mexec processing routines (a NOC bespoke Matlab based processing environment). Calibration of conductivity and fluorescence was based on minimization of residuals after removal of outlier values. Further details on the procedures used for the CTD calibration can be found on page 25 of the AP06 cruise report.

Instrumentation Description

Refer to CTD instrumentation document for this cruise.

BODC Data Processing Procedures

Data were submitted as 43 MSTAR formatted NetCDF files with additional metadata such as station, date, position, Niskin bottle number and pressure (dbar) were also included in the file.

The data were reformatted and assigned BODC parameter codes. Quality control checks were made and BODC applied flags where applicable. The data were then loaded into the BODC database using established BODC data banking procedures.

A parameter mapping table is provided below:

Originator's Parameter Unit BODC Parameter Code BODC Unit Comments
upress dbar PRESPR01 dbar -
utemp degc TEMPST01 &degC -
ucondcal mS/cm CNCLCCI1 S m-1 Divided by 10 to convert units
upsal - PSALCC01 Dimensionless -
uoxygen_per_l umol/l DOXYSU01 &micromol/l -
ufluor_cal ug/l CPHLPS01 mg m-3 ug/l and mg m-3 units are equivalent
uturbidity m^-1/sr BB117NIR m-1 nm-1 sr-1 -

SOLSTICE-WIO AP06 Total and size-fractionated chlorophyll measurements from CTD bottles

Originator's Protocol for Data Acquisition and Analysis

Sampling for bulk chlorophyll measurements was undertaken at all stations during Angra Pequena cruise AP06. Seawater samples were collected by CTD Niskin deployment from 6 standard depths throughout the cruise.

Water was drained from each Niskin bottle into a separate large 10L receiving carboy, from which four 250 ml replicate water samples were collected for each size fraction and filtered through a 25 mm glass fibre (GF/F) filter with a 0.7 µm pore size for the bulk measurement or through polycarbonate filters of 2µm, 10 µm, or 20µm pore size for the three size fractions.

After filtration under vacuum, each filter was placed into a glass scintillation vial, inoculated with 6 ml of 90% acetone and refrigerated for 18-24 hours at 4°C . Sample fluorescence was measured on a calibrated Turner Trilogy fluorometer and converted to true chlorophyll concentrations using the following calibration equation factoring in sample volume, extraction volume and any corrective factors:

True chlorophyll (mg m-3) = measured fluorescence (RFU) x 0.13

Results are reported for each size fraction (bulk or total chlorophyll representing the >0.7 µm particulate pool, >2 µm, >10 µm and >20 µm size fractions). Sampling for size-fractionated chlorophyll measurements was also undertaken at all stations and from all Niskin bottles

Instrumentation Description

Trilogy Turner fluorometer

BODC Data Processing Procedures

Data were submitted in an .xlsx spreadsheet bulk chlorophyll-a measurements with additional metadata such as station, date, position, Niskin bottle number, depth (m) and pressure (dbar) were also included in the file.

The data were reformatted and assigned BODC parameter codes. Quality control checks were made and BODC applied flags where applicable. The data were then loaded into the BODC database using established BODC data banking procedures.

A parameter mapping table is provided below:

Originator's Parameter Unit BODC Parameter Code BODC Unit Comments
BULK Chl-a mg m-3 CPHLFLP1 mg m-3 -
Chl-a >2 µm mg m-3 SCHLFLPB mg m-3 -
Chl-a >10 um mg m-3 SCHLFLPO mg m-3 -
Chl-a>20 um mg m-3 SCHLFLPQ mg m-3 -

Data Quality Report

BODC performed quality control checks on the data. Any data values which were below the detection limit of the instrument were assigned a '<' flag.


Project Information

SOLSTICE-WIO: Sustainable Oceans, Livelihoods and food Security Through Increased Capacity in Ecosystem research in the Western Indian Ocean

Introduction

SOLSTICE-WIO is a four-year collaborative project funded by the UK Global Challenges Research Fund (GCRF). Launched in October 2017, it brings together recent advances in marine technologies, local knowledge and research expertise to address challenges facing the Western Indian Ocean region in a cost-effective way via state-of-the-art technology transfer, collaborative environmental and socio-economic research and hands-on training.

Over 100 million people in the Western Indian Ocean (WIO) region live within 100km of the coast, with over 1 million working in the fisheries sector. The WIO is highly dependent on the ocean for economic stability, food security, and social cohesion. In recent years, the region has seen dramatic and often poorly understood reductions in key fisheries, due to the combined effects of climate change, natural ecosystem variability, overfishing and degradation of key marine habitats. Until the mechanisms behind the collapse are understood, there is little potential for aiding recovery or guiding adaptation. The key to stability of living marine resources lies in an ecosystem approach to fisheries (EAF), which sees human-natural systems as a whole, integrated entity rather than separately considering individual target species. Understanding and managing WIO fisheries and the impacts of recent and future changes requires a mature capacity to implement an ecosystem approach to fisheries management (EAF) that is built on sound environmental and socio-economic information.

The core strength of SOLSTICE-WIO lies in its integral approach to food security, drawing on UK expertise in physical oceanography, marine ecology, autonomous observations, environmental economics and the human dimension,and WIO expertise in fisheries, the marine economy and regional policy development. SOLSTICE will provide the region with the state-of-the-art technology to deliver cost-effective marine research and provide the information needed to achieve maximum potential from the region's living marine resources. In the UK marine robotics, ocean models and novel data products from satellite observations have developed rapidly in the last decade, and now underpin Blue Economies and Ocean Governance in Europe. These technologies are highly agile and ready to be applied in the developing world as cost-effective ways to maximise understanding and sustainable exploitation of living marine resources. Such "technology leapfrogging" can overcome the severe lack of research ships in the WIO and save decades of effort in developing predictive modelling systems from scratch.

Scientific Objectives

SOLSTICE-WIO main objectives are to:

  1. Grow marine environmental research capability to address challenges facing the WIO region in a cost-effective way via state-of-the-art technology transfer, collaborative environmental and socio-economic research, and hands-on training.
  2. Strengthen the capacity of UK marine scientists to apply leading-edge technologies in developing countries, and work with regional and local experts to ensure that their research addresses local and regional needs.
  3. Strengthen the ability of WIO scientists to effectively deliver evidence-based environmental and socio-economic information to support policy development and implementation at national and regional levels.
  4. Ensure future sustainability of marine research capability in the region by training and mentoring early career scientists and post-graduate students from the WIO and by developing on-line resources for use in distance learning and hands-on training of marine scientists outside the partner organisations and beyond the duration of the project.
  5. Ensure on-going support for an Ecosystem Approach to Fisheries in the WIO by building lasting strategic research partnerships between UK marine science and regional centres of excellence, between these centres and other WIO research organisations, and between marine scientist and government agencies and NGOs mandated to deliver sustainable development and exploitation of marine living resources in the WIO.

Fieldwork

SOLSTICE-WIO will demonstrate its approach to strengthening research capacity through three case studies in Kenya, Tanzania and South Africa. These have been selected by SOLSTICE-WIO partners in each of the three countries.

  • Tanzania Case Study: Pemba Channel small pelagic fishery under climate threat.

    The small pelagic fishery is important for local communities in Zanzibar and mainland Tanzania as a source of food security, nutrition and livelihood support. This diverse group includes mackerel, sardines and anchovies â?? found in schools over the continental shelf, in bays and deep lagoons with nutrient rich waters. They are more abundant during the southeast monsoon, when stronger winds drive upwelling that brings nutrient rich water to the surface.

    Despite its importance for coastal economies, there is a lack of data and information about the fishery, which hampers effective management. Using robotics, modelling, remote sensing, field observations and socio-economic studies, SOLSTICE will identify key environmental and anthropogenic drivers of the main species and address climatic pressures on this fishery.

  • Kenya Case Study: Emerging fishery of the North Kenya Bank, an opportunity for coastal populations.

    The North Kenya Bank fishery is expected to spur economic growth for local communities. If well managed, it could help achieve national development goals, including poverty alleviation and wealth creation. Sustainability requires informed management interventions, but there is only scant information on the ecological status and drivers of the fishery.

    Using modelling, remote sensing, field observations and socio-economic studies, SOLSTICE will explore processes related to productivity and resilience of the ecosystems supporting the fishery, identify the main drivers of variability and change, and advise the fishery and government on how to optimise use of this important resource.

  • South Africa Case Study: Environmental drivers and socio-economic consequences of the South African Chokka squid fishery collapsing.

    The collapse of the Chokka squid fishery in 2013 had a devastating effect on the Eastern Cape, one of the poorest provinces in South Africa. The reasons for the collapse are unknown, although local fishermen believe it happened as a result of environmental change.

    SOLSTICE will address key environmental and anthropogenic factors controlling the ecosystem dynamics of the Agulhas Bank. The results will help explain why the fishery collapsed, and inform the fishery and government as to whether the current recovery is stable, or whether similar collapses are likely in the future.

BODC image

Project Collaborators

The science delivered as part of SOLSTICE-WIO is greatly enhanced by the collaboration of the following institutions:

  • National Oceanography Centre (NOC)
  • Plymouth Marine Laboratory (PML)
  • Scottish Association for Marine Science (SAMS)
  • Heriot-Watt University
  • Imperative Space
  • Nelson Mandela University (NMU)
  • South African Squid Management Industry Association
  • Rhodes University
  • South African Environmental Observation Network
  • University of Cape Town
  • Institute of Marine Sciences (IMS)
  • Western Indian Ocean Marine Science Association
  • Tanzania Fisheries Research Institute (TAFIRI)
  • Environment for Development - Tanzania (EfDT)
  • WWF Tanzania
  • Kenya Marine and Fisheries Research Institute (KMFRI)
  • Coastal Oceans Research and Development â?? Indian Ocean
  • University of Seychelles
  • Mozambique National Institute of Fisheries Research
  • Institut Halieutique et des Sciences Marines (IH.SM)

SOLSTICE-WIO Leadership Team

Directors

  • Prof Mike Roberts (Nelson Mandela University (NMU), South Africa)
  • Dr Katya Popova (National Oceanography Centre (NOC), UK)

Members

  • Prof Julius Francis (Western Indian Ocean Marine Science Association (WIOMSA), Tanzania)
  • Dr Yohana W. Shaghude (Institute of Marine Sciences (IMS), Tanzania)
  • Dr Baraka Sekadende (Tanzania Fisheries Research Institute (TAFIRI), Tanzania)
  • Dr Joseph Kamau (Kenya Marine and Fisheries Research Institute (KMFRI), Kenya)
  • Prof Warwick Sauer (Rhodes University (Rhodes), South Africa)
  • Dr Eleni Papathanasopoulou (Plymouth Marine Laboratory (PML), UK)
  • Dr Matthew Palmer (National Oceanography Centre (NOC), UK)
  • Dr Val Byfield (National Oceanography Centre (NOC), UK)
  • Sofia Alexiou (National Oceanography Centre (NOC), UK)

Funding

This is a NERC funded research project. The total value of the grant is £6,934,488 and the period of award is from September 4th 2017 to March 3rd 2020. NERC Reference: NE/P021050/1


Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 2019-06-30
End Date (yyyy-mm-dd) Ongoing
Organization Undertaking ActivityNational Oceanography Centre, Southampton
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierAP06_CTD_CTD_AP06_003
Platform Categorylowered unmanned submersible

BODC Sample Metadata Report for AP06_CTD_CTD_AP06_003

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
1814327   10.00 1 1      150.00 Niskin bottle No problem reported    
1814330   10.00 2 2      100.00 Niskin bottle No problem reported    
1814333   10.00 3 3       75.00 Niskin bottle No problem reported    
1814336   10.00 4 4       50.00 Niskin bottle No problem reported    
1814339   10.00 5 5       25.00 Niskin bottle No problem reported    
1814342   10.00 6 6        5.00 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 AP06
Departure Date 2019-06-29
Arrival Date 2019-07-09
Principal Scientist(s)Stuart Painter (National Oceanography Centre, Southampton)
Ship Angra Pequena

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
B nominal value
Q value below limit of quantification

Appendix 1: AP06_CTD_CTD_AP06_003

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
2049802Water sample data2019-06-30 11:46:594.9926 S, 39.4023 EAngra Pequena AP06