Metadata Report for BODC Series Reference Number 1988296
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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Spatial Co-ordinates | |||||||||||||||||||||||||||||
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Parameters |
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Definition of BOTTFLAG | |||||||||||||||||||||||||||||
BOTTFLAG | Definition |
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0 | The sampling event occurred without any incident being reported to BODC. |
1 | The filter in an in-situ sampling pump physically ruptured during sample resulting in an unquantifiable loss of sampled material. |
2 | Analytical 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. |
3 | The 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. |
4 | During 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. |
5 | Water was reported to be escaping from the bottle as the rosette was being recovered. |
6 | The bottle seals were observed to be incorrectly seated and the bottle was only part full of water on recovery. |
7 | Either 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). |
8 | There is reason to doubt the accuracy of the sampling depth associated with the sample. |
9 | The bottle air vent had not been closed prior to deployment giving rise to a risk of sample contamination through leakage. |
Definition of Rank |
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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
Stand Alone Pump (SAP)
A submersible battery powered water pump that sucks water through various filters leaving the materials of interest on the filter for analysis. SAPs are deployed clamped to a hydrographic wire and may be used to sample at depths of up to 6000 m. A SAP can pump thousands of litres of water over a few hours.
JC010 legs 2 and 3 SAPS data processing
Originator's Protocol for Data Acquisition and Analysis
Suspended particles were collected on large (293mm diameter) precombusted (400°C; 4 h) GF/F filters along the Lisbon, Setubal and Nazare Canyons on the Portuguese Margin (Legs 2 and 3) and the Whittard Canyon on the Irish Margin (Leg 3) using stand alone pumping systems (SAPS; Challenger Oceanic, NOCS). Each SAPS carried two stacked filters, the bottom one being used as a DOM adsorption blank. Two SAPS were used on the same deployment; the first was deployed at the Benthic Boundary Layer (BBL; i.e. 10-20 m above bottom (ab)) and the other at selected depths. The choice of the depths was based on the water structure of CTD profiles that were carried out immediately or soon before the SAPS deployments at the same or nearby stations. The pumps were operated for 1-2 hours depending on depth and particle loading as estimated by the BBRTD sensors of the CTD. On recovery, both SAPS filters were folded, wrapped in separate pre-combusted (400°C; 4 h) foil and stored in -80°C for the duration of the cruise. Elemental, chlorophyll, lipid and isotopic analyses were carried out after freeze drying of the filters in the laboratory.
BODC Data Processing Procedures
Data received were loaded into the BODC database using established BODC data banking procedures. Data were loaded into BODC's database without any changes.
Two data points (particulate nitrogen = 0.1 µg/L) were flagged by the orriginator as being close to the detection limit and therefore potentially unreliable. These flags were mapped to the BODC quality control flag 'L'.
Originators parameters were mapped to BODCs parameters as follows:
Originator's Parameter | Unit | BODC Parameter Code | BODC Unit | Comments |
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[POC] | µg/L | CORGPGFF | µmol/l | Values were divided by molar mass of carbon (12.0107) to convert to µmol/L |
[PN] | µg/L | NTOTPGFF | µmol/l | Values were divided my molar mass of nitrogen (14.0067) to convert to µmol/L |
C/N | - | ISMA1502 | - | - |
δ13C | ppt | D13COPXX | ppt | - |
δ15N | ppt | D15NOPXX | ppt | - |
total lipids | ng/L | LIPIDWCL | ng/l | - |
Project Information
Oceans 2025 Theme 5: Continental Margins and the Deep Ocean
The deep ocean and the seafloor beneath it are the largest yet least known environments on our planet. They profoundly influence the way in which the Earth reacts to climate change, provide vital resources, and can cause natural catastrophes (with significant risks to the UK). A better understanding of the biodiversity and resource potential of the deep ocean, its geophysics and its complex interactions with the global carbon cycle are all urgently required.
The overall aim of Theme 5 is to deliver coordinated, multidisciplinary research on the functioning of the deep ocean from the photic zone to the sub-seabed, encompassing biology, physics, geology, chemistry and mathematical modelling. Such an integrated deep-sea programme is unique in the UK and will ensure the provision of knowledge essential for underpinning UK policy in conserving marine biodiversity, controlling the effects of global change, managing ocean resources in a sustainable manner, and mitigating the effects of geohazards.
The specific objectives of Theme 5 are:
- To understand the processes controlling the vertical flux of carbon between the base of the photic zone and the seabed and to quantify this flux.
- To quantify fluxes of carbon and fluids from the sub-seabed into the deep ocean and their contribution to global carbon budgets.
- To determine how the carbon flow interacts with deep-ocean pelagic and benthic communities in the open ocean and on the continental slope.
- To investigate how benthic ecosystems on continental margins and in the deep ocean respond to spatial and temporal variation in environmental parameters.
- To understand the causes, frequency and predictability of submarine geohazards.
- To apply scientific knowledge to the sustainable management of the ocean and its resources.
Theme 5 combines two Research Units, on Continental Margins and on the Biochemistry of the Deep Ocean. Ultimately the science of the two activities will be combined, but because the methods of study and the resources needed are largely different, the work has been planned within two groups.
In Continental Margins, the physical processes regulating the transport of sediment is investigated as well as the transport of hydrocarbons and aqueous fluids from the seafloor. The effect of both of these major processes on the landscape ecology of the continental slope will be assessed. In addition, the causes, mechanisms and frequency of submarine geohazards will be studied, particularly those that potentially could have a devastating effect on coastal communities, such as earthquake and landslide-induced tsunamis. Carbon flux from the geosphere into the ocean will be assessed. The information will be used to advise on whole ecosystem management strategies, including policy issues relating to Marine Protected Areas and international treaties on the development of open ocean resources.
In Biogeochemistry of the Deep Ocean, the flux of particles through the 'twilight zone' in order to reduce the large uncertainties in our knowledge of the magnitude of the downward flux in various biogeochemical provinces of the global ocean will be studied. The twilight zone is a large biogeochemical reactor influencing the supply of nutrients to the euphotic zone and the fate of materials consigned to the deep seafloor. Theme 5 will study how zooplankton and microbes repackage and breakdown particles, and how these processes influence carbon transfer. Direct observations and experimental approaches will provide data to drive stoichiometric models of heterotrophic OM utilisation. The impact on the deep-sea benthos of repackaged OM, and the of part of surface production that by-passes twilight zone processes, will be assessed by analysing global patterns and through ROV in situ experimentation. Proven modelling expertise in upper ocean systems will be extended to benthic ecosystems utilising the information generated by bentho-pelagic coupling observations and experimental approaches.
The official Oceans 2025 documentation for this Theme is available from the following link: Oceans 2025 Theme 5
Weblink: http://www.oceans2025.org/
Data Activity or Cruise Information
Data Activity
Start Date (yyyy-mm-dd) | 2007-06-13 |
End Date (yyyy-mm-dd) | 2007-06-13 |
Organization Undertaking Activity | National Oceanography Centre, Southampton |
Country of Organization | United Kingdom |
Originator's Data Activity Identifier | JC010_2_SAP_JC10/2-097 |
Platform Category | lowered unmanned submersible |
BODC Sample Metadata Report for JC010_2_SAP_JC10/2-097
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 |
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1307744 | 465.00 | 30.00 | Stand-alone pump | No problem reported | near surface | |||||
1307747 | 1433.00 | 3630.00 | Stand-alone pump | No problem reported | Benthic Boundry Layer |
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.
Cruise
Cruise Name | JC010_2 (JC10) |
Departure Date | 2007-06-03 |
Arrival Date | 2007-06-21 |
Principal Scientist(s) | Douglas G Masson (National Oceanography Centre, Southampton) |
Ship | RRS James Cook |
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 |
---|---|
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 |