Metadata Report for BODC Series Reference Number 2138590
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
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Time Co-ordinates(UT) |
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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
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.
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.
JC090 chlorophyll a sampling document
Originator's protocol for data acquisition
The following contains extracts from the JC090 cruise report.
The RRS James Cook 090 cruise was the concluding phase of the fieldwork for the Ocean Surface Mixing, Ocean Sub-mesoscale Interaction Study (OSMOSIS) consortium and sought to recover 9 moorings and 2 gliders to conduct hydrographic and biogeochemical measurements for mooring and glider calibration, and to obtain opportunistic measurements of upper-ocean microstructure and air-sea CO2 fluxes. The cruise departed on the 30 August 2013 from the port of Vigo, Spain and returned on the 17 September 2013 at the port of Santander, Spain.
Sample collection
A CTD rosette was used for collecting water samples from various depths between the surface and 200 m. The rosette had 24 Niskin bottles with a 20 litre capacity. Samples were also collected from the ships underway system (~ 5 m depth) approximately every 6 hours starting at 11:00 hours (GMT) on 02 Sep 2013 and finishing at 17:00 hours (GMT) on 13 Sep 2013.
Onboard analysis was conducted for chlorophyll samples only.
Chlorophyll a samples were collected from Niskin bottles. These were fired at depths between 100 m and the surface. Chlorophyll a samples were also taken from the ships underway. Water samples collected were always analysed for estimation of total chlorophyll concentration and community size fractionation. Size fractionation of chlorophyll samples was conducted in order to determine the ratio between microphytoplankton (> 10 µm) as well as pico- and nano phytoplankton (< 10 µm).
Chlorophyll a greater than 10 µm.
A 25 mm 10 µm polycarbonate filter was placed into a filtration unit and 250 ml wass measured and poured into the filtration unit. The polycarbonate filter was gently removed and placed sample side up in a 20 ml glass vial. 8 ml of 90% acetone was added and left in a fridge for 18-20 hours.
Chlorophyll a less than 10 µm.
The samples were filtered through a 25 mm GF/F filter using the 6-port filtration rig. The filter was then gently removed and placed sample side up in a 20 ml glass vial. 8 ml of 90% acetone was added and left in a fridge for 18-20 hours.
Total Chlorophyll a
A 25 mm filter was placed into a 6-port chlorophyll rig and 250 ml of seawater was measured and filtered under gentle vacuum. The filter was then gently removed and placed in a 20 ml glass vial. 8 ml of 90% acetone was added and left in a fridge at 4°C for 18-20 hours in a dark box.
Sample analysis
After 18-20 hours of refrigeration the chlorophyll samples were analysed with a fluorometer.
BODC data processing procedures
The chlorophyll data were supplied to BODC in Microsoft Excel format and values were extracted for loading into BODC's ocean database under the ORACLE Relational Database Management System. Data that were considered unrealistic were flagged suspect.
Content of data series
| Originator's Parameter | Unit | Description | BODC Parameter code | BODC Unit | Comments |
|---|---|---|---|---|---|
| Total Chlorophyll a (CTD and underway samples) | mg/m3 | Concentration of chlorophyll-a {chl-a} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and fluorometry | CPHLFLP1 | mg/m3 | N/A |
| >10 µm Chlorophyll-a | mg/m3 | Concentration of chlorophyll-a {chl-a} per unit volume of the water body [particulate >10 µm phase] by filtration, acetone extraction and fluorometry | SCHLFLPO | mg/m3 | N/A |
| <10 µm Chlorophyll-a | mg/m3 | Concentration of chlorophyll-a {chl-a} per unit volume of the water body [particulate >GF/F phase] by filtration, acetone extraction and fluorometry and summation of size-fractionated values | CPHLFLP6 | mg/m3 | N/A |
Data quality report
No problems reported and no significant issues encountered during BODC data banking procedures.
References
Naveira-Garabato A. et al. (2013). 'Ocean Surface Mixing, Ocean Sub-mesoscale Interaction Study (OSMOSIS)'. Cruise Report No. 25 National Oceanography Centre, Southampton.
Project Information
Ocean Surface Mixing, Ocean Sub-mesoscale Interaction Study (OSMOSIS)
Background
The Ocean Surface Mixing, Ocean Sub-mesoscale Interaction Study (OSMOSIS) consortium was funded to deliver NERC's Ocean Surface Boundary Layer (OSBL) programme. Commencing in 2011, this multiple year study will combine traditional observational techniques, such as moorings and CTDs, with the latest autonomous sampling technologies (including ocean gliders), capable of delivering near real-time scientific measurements through the water column.
The OSMOSIS consortium aims to improve understanding of the OSBL, the interface between the atmosphere and the deeper ocean. This layer of the water column is thought to play a pivotal role in global climate and the productivity of our oceans.
OSMOSIS involves collaborations between scientists at various universities (Reading, Oxford, Bangor, Southampton and East Anglia) together with researchers at the National Oceanography Centre (NOC), Scottish Association for Marine Science (SAMS) and Plymouth Marine Laboratory (PML). In addition, there are a number of project partners linked to the consortium.
Scientific Objectives
- The primary goal of the fieldwork component of OSMOSIS is to obtain a year-long time series of the properties of the OSBL and its controlling 3D physical processes. This is achieved with an array of moorings (two nested clusters of 4 moorings, each centred around a central mooring) and gliders deployed near the Porcupine Abyssal Plain (PAP) observatory. Data obtained from this campaign will help with the understanding of these processes and subsequent development of associated parameterisations.
- OSMOSIS will attempt to create parameterisations for the processes which determine the evolving stratification and potential vorticity budgets of the OSBL.
- The overall legacy of OSMOSIS will be to develop new (physically based and observationally supported) parameterisations of processes that deepen and shoal the OSBL, and to implement and evaluate these parameterisations in a state-of-the-art global coupled climate model, facilitating improved weather and climate predictions.
Fieldwork
Three cruises are directly associated with the OSMOSIS consortium. Preliminary exploratory work in the Clyde Sea (September 2011) to hone techniques and strategies, followed by a mooring deployment and recovery cruise in the vicinity of the Porcupine Abyssal Plain (PAP) observatory (in late Summer 2012 and 2013 respectively). Additional opportunist ship time being factored in to support the ambitious glider operations associated with OSMOSIS.
Instrumentation
Types of instrumentation and measurements associated with the OSMOSIS observational campaign:
- Ocean gliders
- Wave rider buoys
- Towed SeaSoar surveys
- Microshear measurements
- Moored current meters, conductivity-temperature sensors and ADCPs
- Traditional shipboard measurements (including CTD, underway, discrete nutrients, LADCP, ADCP).
Contacts
| Collaborator | Organisation |
|---|---|
| Prof. Stephen Belcher | University of Reading, U.K |
| Dr. Alberto C Naveira Garabato | University of Southampton, U.K |
Data Activity or Cruise Information
Cruise
| Cruise Name | JC090 |
| Departure Date | 2013-08-31 |
| Arrival Date | 2013-09-16 |
| Principal Scientist(s) | Alberto C Naveira Garabato (University of Southampton School of Ocean and Earth Science) |
| 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 |
|---|---|
| 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 |
