Metadata Report for BODC Series Reference Number 1249370


Metadata Summary

Data Description

Data Category Water sample data
Instrument Type
NameCategories
Niskin bottle  discrete water samplers
Instrument Mounting lowered unmanned submersible
Originating Country United Kingdom
Originator Mr Mark Stinchcombe
Originating Organization National Oceanography Centre, Southampton
Processing Status banked
Project(s) UKOARP_ThemeB
 

Data Identifiers

Originator's Identifier D366_CTD_NUTS_257:D366073
BODC Series Reference 1249370
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2011-07-06 03:52
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval -
 

Spatial Co-ordinates

Latitude 58.60260 N ( 58° 36.2' N )
Longitude 10.49935 W ( 10° 30.0' W )
Positional Uncertainty Unspecified
Minimum Sensor Depth 5.4 m
Maximum Sensor Depth 1865.5 m
Minimum Sensor Height 19.5 m
Maximum Sensor Height 1879.6 m
Sea Floor Depth 1885.0 m
Sensor Distribution Unspecified -
Sensor Depth Datum Unspecified -
Sea Floor Depth Datum Instantaneous - Depth measured below water line or instantaneous water body surface
 

Parameters

BODC CODE Rank Units Short Title Title
ADEPZZ01 1 Metres DepBelowSurf Depth below surface of the water body
BOTTFLAG 1 Dimensionless C22_flag Sampling process quality flag (BODC C22)
FIRSEQID 1 Dimensionless FireSeqNo Bottle firing sequence number
NTRZAATX 1 Micromoles per litre NO3+NO2_Unfilt_ColAA Concentration of nitrate+nitrite {NO3+NO2} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis
PHOSAATX 1 Micromoles per litre PO4_Unfilt_ColAA Concentration of phosphate {PO43- CAS 14265-44-2} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis
ROSPOSID 1 Dimensionless RosPos Bottle rosette position identifier
SAMPRFNM 1 Dimensionless SampRef Sample reference number
SLCAAATX 1 Micromoles per litre SiOx_Unfilt_ColAA Concentration of silicate {SiO44- CAS 17181-37-2} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis
 

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.

UKOA D366 micro-molar nutrient measurements from CTD bottle, underway and bioasssay samples

Originator's Protocol for Data Acquisition and Analysis

Analysis for micro-molar concentrations of nitrate and nitrite (hereinafter TON), phosphate and silicate was undertaken on a Skalar San+ segmented flow autoanalyser following methods described by Kirkwood (1996). Samples were drawn from Niskin bottles on the CTD into 25 ml sterilin coulter counter vials and kept refrigerated at approximately 4°C until analysis, which commenced within twelve hours. Overall 38 runs with a total 2362 samples were analysed. This was a total of 1294 CTD samples, 323 underway samples, 496 bioassay samples and 57 from other sources.

During the cruise 5 bioassay experiments were conducted that were designed to evaluate the response of multiple organisms and processes to artificial carbonate system manipulation. An extra 3 nutrient addition experiments were also conducted onboard. The incubations were performed within a purpose-built experimental laboratory allowing acute temperature and light control. The temperature in the container was set to match the in situ at the time of the water collection. The light (100 µE. m-2. s-1) was provided by LED panels and remained constant through the cruise. A 14/8 h light/dark cycle was applied. Each of the 5 bioassays were run for 4 days with 2 time points: T1 (48h) and T2 (96h). In order to provide enough water to process the various analyses and to have triplicate of each measurement, 9 bottles were dedicated to each time point. A total of 72 bottles were set up for each bioassay and arranged on shelves in the container. At pre-dawn, surface water (~ 5m deep) was collected from Niskin bottles (24 X 20L) out of one single cast and immediately dispatched in transparent acid-cleaned 4L polycarbonate bottles on deck. The bottles were then wrapped individually in zip lock bags to avoid contamination pending carbonate chemistry manipulations.

An artificial seawater matrix (ASW) of 40 g/litre sodium chloride was used as the intersample wash and standard matrix. The nutrient free status of this solution was checked by running Ocean Scientific International (OSI) low nutrient seawater (LNS) on every run. A single set of mixed standards were made up by diluting 5 mM solutions made from weighed dried salts in 1 litre of ASW into plastic 1 litre volumetric flasks that had been cleaned by soaking in MilliQ water (MQ). The concentration of the standards were tested on every run by analysing diluted OSI certified standards, one high concentration sample (10 µM for TON and silicate, 1.95 µM for phosphate) and one low concentration sample (1µM for TON and silicate and 0.1µM for phosphate). Data processing was undertaken using Skalar proprietary software and was performed within twelve hours of the run being finished. The wash time and sample time were 90 seconds; the lines were washed daily with 10% Decon and MQ.

Instrumentation Description

Skalar SAN+ System colorimetric autoanalyser

BODC Data Processing Procedures

Data were submitted via email in an Excel spreadsheet archived under BODC's accession number SOC120231. Sample metadata (Cruise, station, Date, Time, CTD cast, rosette bottle number, underway identifier, depth and incubation sample details) were checked against information held in the database. There were no discrepancies.

The concentration data were provided in equivalent units to those of the BODC parameter codes assigned. Where replicate measurements were provided the mean and standard deviation were calculated and loaded to the database.

The data were reformatted and loaded in BODC's samples database under Oracle Relational Database Management System. Data were marked up with BODC parameter codes and loaded into the database.

A parameter mapping table is provided below;

Originator's Parameter Units Description BODC Parameter Code Units Comments
Nitrate and Nitrite Micromoles per litre Concentration of nitrate+nitrite {NO3+NO2} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis NTRZAATX Micromoles per litre n/a
Silicate Micromoles per litre Concentration of silicate {SiO44- CAS 17181-37-2} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis SLCAAATX Micromoles per litre n/a
Phosphate Micromoles per litre Concentration of phosphate {PO43- CAS 14265-44-2} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis PHOSAATX Micromoles per litre n/a
Nitrate -bioassay Micromoles per litre Concentration of nitrate+nitrite {NO3+NO2} per unit volume of experiment water sample [dissolved plus reactive particulate phase] by colorimetric autoanalysis NTRZEXTX Micromoles per litre n/a
Silicate - bioassay Micromoles per litre Concentration of silicate {SiO44- CAS 17181-37-2} per unit volume of experiment water sample [dissolved plus reactive particulate phase] by colorimetric autoanalysis SLCAEXTX Micromoles per litre n/a
Phosphate - bioassay Micromoles per litre Concentration of phosphate {PO43- CAS 14265-44-2} per unit volume of experiment water sample [dissolved plus reactive particulate phase] by colorimetric autoanalysis PHOSEXTX Micromoles per litre n/a
Nitrate standard deviation - bioassay Micromoles per litre Concentration standard deviation of nitrate+nitrite {NO3+NO2} per unit volume of experiment water sample [dissolved plus reactive particulate phase] by colorimetric autoanalysis NTRZSDTX Micromoles per litre n/a
Silicate standard deviation - bioassay Micromoles per litre Concentration standard deviation of silicate {SiO44- CAS 17181-37-2} per unit volume of experiment water sample [dissolved plus reactive particulate phase] by colorimetric autoanalysis SLCASDTX Micromoles per litre n/a
Phosphate standard deviation - bioassay Micromoles per litre Concentration standard deviation of phosphate {PO43- CAS 14265-44-2} per unit volume of experiment water sample [dissolved plus reactive particulate phase] by colorimetric autoanalysis PHOSSDTX Micromoles per litre n/a

Data Quality Report

The data originator provided no comments on the data quality.

Problem Report

Not relevant to this data set.


Project Information

UKOARP Theme B: Ocean acidification impacts on sea surface biology, biogeochemistry and climate

The overall aim of this theme is to obtain a quantitative understanding of the impact of ocean acidification (OA) on the surface ocean biology and ecosystem and on the role of the surface ocean within the overall Earth System.

The aims of the theme are:

The main consortium activities will consist of in-situ measurements on three dedicated cruises, as well as on-deck bioassay experiments probing the response of the in-situ community to elevated CO2. Most of the planned work will be carried out on the three cruises to locations with strong gradients in seawater carbon chemistry and pH; the Arctic Ocean, around the British Isles and the Southern Ocean.

Weblink: http://www.oceanacidification.org.uk/research_programme/surface_ocean.aspx


Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 2011-07-06
End Date (yyyy-mm-dd) Ongoing
Organization Undertaking ActivityUniversity of Southampton School of Ocean and Earth Science
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierD366_CTD_D366073
Platform Categorylowered unmanned submersible

BODC Sample Metadata Report for D366_CTD_D366073

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
626846   20.00 1 1 1892.00 1892.60 1865.50 Niskin bottle No problem reported    
626849   20.00 2 2 1891.70 1892.70 1865.40 Niskin bottle No problem reported    
626852   20.00 3 3 1712.30 1713.20 1689.20 Niskin bottle Bottle misfire    
626855   20.00 4 4 1712.50 1713.90 1689.60 Niskin bottle No problem reported    
626858   20.00 5 5 1712.20 1714.10 1689.50 Niskin bottle No problem reported    
626861   20.00 6 6 1712.60 1713.50 1689.40 Niskin bottle No problem reported    
626864   20.00 7 7 1520.60 1522.00 1500.90 Niskin bottle No problem reported    
626867   20.00 8 8 1318.60 1319.50 1301.90 Niskin bottle Bottle leak    
626870   20.00 9 9 1113.30 1114.00 1099.60 Niskin bottle No problem reported    
626873   20.00 10 10  961.80  963.00  950.50 Niskin bottle No problem reported    
626876   20.00 11 11  709.10  710.20  701.10 Niskin bottle No problem reported    
626879   20.00 12 12  505.60  506.90  500.20 Niskin bottle No problem reported    
626882   20.00 13 13  303.80  305.40  300.80 Niskin bottle No problem reported    
626885   20.00 14 14  101.10  103.10  100.40 Niskin bottle No problem reported    
626888   20.00 15 15   51.60   51.80   50.50 Niskin bottle No problem reported    
626891   20.00 16 16   40.70   42.20   40.30 Niskin bottle No problem reported    
626894   20.00 17 17   31.00   31.80   30.40 Niskin bottle Bottle misfire    
626897   20.00 18 18   20.10   20.70   19.50 Niskin bottle No problem reported    
626900   20.00 19 19   10.70   11.40   10.20 Niskin bottle No problem reported    
626903   20.00 20 20   10.60   11.30   10.10 Niskin bottle No problem reported    
626906   20.00 21 21    5.60    6.80    5.40 Niskin bottle No problem reported    
626909   20.00 22 22    5.70    6.80    5.50 Niskin bottle Bottle leak    
626912   20.00 23 23    5.60    7.10    5.60 Niskin bottle No problem reported    
626915   20.00 24 24    5.60    6.80    5.40 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.

Other Series linked to this Data Activity - 1713452

Cruise

Cruise Name D366 (D367)
Departure Date 2011-06-06
Arrival Date 2011-07-09
Principal Scientist(s)Eric Pieter Achterberg (University of Southampton School of Ocean and Earth Science)
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