Metadata Report for BODC Series Reference Number 1363500

• 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

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

Vemco Minilog II T 16-bit Temperature Logger

The VEMCO Minilog II T is a fully submersible, 10-year temperature data logger measures and stores temperature at specified sampling intervals. The Minilog- II-T data logger is manufactured to withstand both fresh and saltwater environments.

Specifications

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

JC088 moored Vemco Miniloggers (Sites LA, LB and SB): Originator's data processing

Sampling Strategy

RRS James Cook cruise JC088 was the second of two cruises funded by the NERC 'Fluxes Across the Sloping Topography of the North East Atlantic (FASTNEt)' Consortium. JC088 was a 26 day cruise sailing on 28 June 2013 from King George V Dock, Govan to the Malin Shelf edge where inline/single point and bed frame moorings were deployed before returning to Southampton on 24 July 2013.

Data Processing

Binary data from each instrument was downloaded and saved as an ASCII .csv file. No further post-processing was carried out, besides a calibration exercise (detailed below).

Calibrations

All Vemco Miniloggers (ML) were calibrated using bath calibrations performed in a temperature controlled bath before the cruise at SAMS. The Vemco Minilog II T 16-bit temperature logger minilogs were brand new and so the tank calibrations confirmed the manufacturer's calibration and so were not applied. The older Vemco Minilog12 temperature recorder instruments were calibrated with the results from the bath calibrations.

Calibrations applied to Vemco Minilog12-T data -

• Serial number 1066 - Calibrated Temperature= 0.95882*T + 1.0483
• Serial number 1068 - Calibrated Temperature= 0.95092*T + 1.2077
• Serial number 1443 - Calibrated Temperature= 0.99946*T + 0.024051
• Serial number 1444 - Calibrated Temperature= 1.0009*T - 0.012454
• Serial number 1445 - Calibrated Temperature= 0.9964*T + 0.052341
• Serial number 1446 - Calibrated Temperature= 0.99302*T + 0.1436
• Serial number 1448 - Calibrated Temperature= 0.99994*T - 0.0030893
• Serial number 1592 - Calibrated Temperature= 1.0032*T - 0.032003
• Serial number 1593 - Calibrated Temperature= 1.0037*T - 0.029957
• Serial number 1598 - Calibrated Temperature= 1.0018*T + 0.0051334
• Serial number 1602 - Calibrated Temperature= 0.99852*T + 0.006309
• Serial number 1622 - Calibrated Temperature= 0.98888*T + 0.2605
• Serial number 1623 - Calibrated Temperature= 1.0032*T - 0.03421
• Serial number 1624 - Calibrated Temperature= 0.99736*T + 0.052192
• Serial number 6178 - Calibrated Temperature= 0.93005*T + 1.3204

JC088 moored Vemco Miniloggers (Sites LA, LB and SB): Processing by BODC

Data from 25 Vemco Miniloggers arrived at BODC in .csv files. Of these, 15 were 12-T Vemco Minilogs (12 bit resolution) and 10 were II-T Vemco Minilogs (16 bit resolution). The Originator confirmed data from instrument serial number 1692 as lost. None of the data files had been trimmed to remove the deployment and recovery phases - this process was performed by BODC.

Data were reformatted to a standard BODC format. During this process the calibration adjustment intended for instrument 6178 was applied (the supplied data file was uncalibrated). The following table shows how the variables within the data files were mapped to appropriate standard BODC parameter codes:

The reformatted data were visualised using BODC's in-house visualisation software. Suspect data were marked by adding an appropriate quality control flag, missing data by both setting the data to an appropriate value and setting the quality control flag.

Project Information

Fluxes Across Sloping Topography of the North East Atlantic (FASTNEt)

Background

The FASTNEt consortium was funded to deliver NERC's Ocean Shelf Edge Exchange Programme. Commencing in October 2011, this four year study aims to couple established observational techniques, such as moorings and CTDs, with the very latest in autonomous sampling initiatives - including use of Autosub Long Range and gliders. With the aid of novel model techniques, these observations will be utilised to construct a new paradigm of Ocean/Shelf exchange.

Shelf edge regions mark the gateway between the world's deep oceans and shallower coastal seas, linking terrestrial, atmospheric and oceanic carbon pools and influencing biogeochemical fluxes. Shelf edge processes can influence near-shore productivity (and fisheries) and ultimately affect global climate.

FASTNEt brings together researchers from multiple UK organisations. Further collaboration has been established with five Project Partners: the UK Met Office, Marine Scotland Science, Agri-Food and Biosciences Institute, Marine Institute Ireland and Scripps Institution of Oceanography.

Scientific Objectives

• To determine the seasonality of physical gradients and exchange across the shelf edge by deploying new observational technologies (gliders, Autosub Long Range) and established techniques (long term moorings, drifters)
• To quantify key exchange mechanisms and to collect new data targeted at testing and improving high resolution models of the shelf edge, by carrying out detailed process studies in contrasting regions of the shelf edge of the NE Atlantic margin
• To develop a new parameterisation of shelf edge exchange processes suitable for regional-scale models, using improved resolution numerical, and new empirical models constrained by the observations
• To test the new parameterisations in a regional model in the context of making an assessment of inter-annual variability of ocean-shelf exchange.

Fieldwork

Three survey sites on the UK shelf edge have been selected for FASTNEt. These are a) the Celtic Sea shelf edge, b) Malin shelf and c) North Scotland shelf. Fieldwork is centred around two research cruises. The first, to the Celtic Sea, on RRS Discovery in June 2012. The second cruise visits the Malin shelf on RRS James Cook, during summer 2013. In addition to these dedicated cruises, opportunist cruise activity to the North Scotland shelf has been agreed with project partner Marine Scotland Science. Autonomous technologies will complement observations made during the cruises and provide knowledge of seasonal and inter-annual variability in exchange processes.

Instrumentation

Types of instruments/measurements:

• Gliders
• Autosub Long Range
• Drifter buoys
• Scanfish
• Microstructure profilers
• Moored CTD/CT loggers and ADCPs
• Shipboard measurements: CTD, underway, nutrients (and other discrete sampling), LADCP, ADCP.

Contacts

Data Activity or Cruise Information

Data Activity

FASTNEt short term inline/single point mooring LA

The short term mooring LA was deployed and recovered during cruise RRS James Cook JC088 as part of the Fluxes Across the Sloping Topography of the North East Atlantic (FASTNEt) project.

The Star-Oddi Starmon mini temperature data have not been ingested into BODC's database. It was not possible to determine which temperature channels corresponded to the depth variable in the MATLAB files BODC received. The raw data (.DAT format) are however preserved in BODC's archives and are available upon request.

Instruments deployed on the mooring

Instrument codes

ADCP - RDI ADCP (U, V, W, Temperature and Pressure)

SBE 37 - SBE37 CTD ( Conductivity, Temperature and Pressure) MicroCAT

SM - Star-Oddi Starmon mini Temperature Recorder

ML - Vemco Minilogger Temperature Recorder

A/R - Acoustic Release

Related Data Activity activities are detailed in Appendix 1

Cruise

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:

SeaDataNet Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

Appendix 1: JC088_LA(short-term)

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.