Metadata Report for BODC Series Reference Number 1837326

• 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

RD Instruments 150kHz Narrow Band Acoustic Doppler Current Profiler

Specifications

BODC Processing of RRS Discovery Vessel Mounted ADCP Data

The data arrived at BODC in 19 Pstar files containing data collected from the 150kHz vessel mounted ADCP during cruise D312. The data were reformatted to BODC's internal NetCDF format. The following table shows the mapping of variables within the Matlab files to appropriate BODC parameter codes:

The data were then visualised using the in-house EDSERPLO software.

OCEANS 2025 cruise D312 150kHz Shipboard ADCP originator data processing

The following was taken from the D312 cruise report. The data were collected using a narrowband RDI 150 kHz Vessel-Mounted Acoustic Doppler Current Profiler (SN: 34). For more detailed information please refer to the cruise report.

Bottom tracking was used over the continental shelf after departing Reykjavik as well as on its return on to port the Scottish continental shelf.

The data were acquired using IBM Data Acquisition Software version 2.48 with profiler software 17.10.

ADCP setup

Field Calibrations

Due to bad weather, a calibration of the 150 kHz VMADCP could not be achieved using bottom tracking data. Instead, the mean was taken from two previous calibrations obtained on cruises D306 and D309.

Using long, straight, steady speed sections of standard two minute ensemble profiles over reasonably constant bottom depth the following calibrations for mis-alignment angle, Ø, and necessary amplification (tilt), A, were derived by comparing GPS derived component vectors of the vessel speed and direction with processed VMADCP bottom track determined component vectors of the vessel speed and direction:

Ø (mis-alignment angle):

• mean = 0.6610

A (tilt):

• mean = 1.0000

Further information on calibration of the VMADCP can be found in the cruise report.

Project Information

Northern Seas Programme

The Northern Seas describes an area extending from the Irish and northern North Sea across the Norwegian Sea up to the marginal Arctic pack-ice zone, including territorial waters of the UK, Norway, Iceland, Denmark and Russia. These waters are an important marine environment playing a significant part in regulating world climate due to the area's role in thermocline circulation in addition to acting as a sink for man-made pollutants carried north by ocean currents. These environments are experiencing increasing pressures from both natural and human impacts and consequently the Northern Seas Programme was developed to help advance the understanding of how marine systems in Northern Seas respond to environmental and anthropogenic change.

Scientific Objectives

The central aim of the programme was to 'improve understanding of how the sensitivity of marine ecosystems to environmental perturbation, both natural and anthropogenic, varies along a latitudinal gradient'.

This aim was addressed through the following integrated themes:

Theme A: Understanding fjordic systems: insights for coastal and oceanic processes

Theme B: Ocean Margins: the interface between the coastal zone and oceanic realm

Theme C: Measuring and modelling change: sea sensors and bioinformatics

The Northern Seas Programme was active between 2001 and 2007. The fieldwork programme to address these objectives was conducted by staff from the Scottish Association for Marine Science (SAMS).

Data Activity or Cruise Information

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: