Metadata Report for BODC Series Reference Number 2247521

• 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

These data have no specific confidentiality restrictions for users. However, users must acknowledge data sources as it is not ethical to publish data without proper attribution. Any publication or other output resulting from usage of the data should include an acknowledgment.

If the Information Provider does not provide a specific attribution statement, or if you are using Information from several Information Providers and multiple attributions are not practical in your product or application, you may consider using the following:

"Contains public sector information licensed under the Open Government Licence v1.0."

Narrative Documents

Teledyne RDI's Workhorse Monitor ADCP

The Workhorse Monitor acoustic doppler current profler (Teledyne RD Instruments) is a long-range and long-term self contained ADCP. It has a patented four beam signal (300, 600 or 1200 kHz) and a standard depth rating of 200m or 600m. It operates effectively between temperatures of -5°C and 45°C and has a velocity accuracy of ±1% ±5mm/s.

Processing by Originator of LADCP velocity profiles from ICEBERGS cruise JR19002

Data Acquisition

LADCP data were collected from as many ICEBERGS CTD sites as possible in Sheldon Cove, Börgen Bay, and Marian Cove.

Two 300-kHz Workhorse LADCP were used in a master/slave and downward/upward-looking configuration (respectively) on the CTD rosette. The LADCP was connected by a serial cable to the CTD computer in the UIC and data download after each station using BBTalk. The instrument was configured to sample 25 x 8 m bins, with data collected in beam coordinates and rotated to Earth coordinates during processing.

Calibration

The data was processed using LDEO version IX_13. Data were processed by incorporating ship navigation and CTD data to constrain the solution for Earth-relative velocity from the measured instrument-relative velocity. Unusable LADCP data resulted at a few stations due to operator errors (2,10,47) and processing issues (53,55,61).

JR19002 Cruise report

Further information can be found in the JR19002 Cruise report.

Processing by BODC of LADCP velocity profiles from ICEBERGS cruise JR19002

JR19002 Teledyne RDI 300kHz Workhorse ADCP data were submitted in file format .nc x34, and were converted to QXF format (BODC internal NetCDF). Originator's variables were mapped to BODC parameter codes.

Following transfer the data were screened using BODC in-house visualisation software. Any suspect data were flagged using the BODC quality control flags.

Project Information

Impacts of deglaciation on benthic marine ecosystems in Antarctica

Impacts of deglaciation on benthic marine ecosystems in Antarctica (ICEBERGS) is one of three NERC-CONICYT joint funded projects running from 2017 to 2021. The aim of the programme is to investigate the impacts of physical disturbance arising from climate-warming induced deglaciation on benthic communities around the West Antarctic Peninsula.

Participants

There are four research institutions involved in the project:

• University of Bangor
• University of Exeter
• Universidad Católica de la Santísima Concepción
• British Antarctic Survey (BAS)

Research Details

In order to meet the aim of the project, the ICEBERGS consortium produced six objectives:

• Monitoring glacier retreat over time and scour intensity on the adjacent seabed.
• Determine the benthic assemblage structure from localities with different perturbation levels.
• Evaluate nutritional and reproductive conditions of adults.
• Analyse growth rates from bivalve/gastropod shells and bryozoan populations with different perturbation levels.
• Develop reconstructions of physical disturbance due to iceberg discharge from growth patterns present in the carbonate structure of the shells of marine molluscs.
• Estimate the effect of marine glacier discharge and iceberg scouring on the genetic diversity and connectivity of marine invertebrate populations and the role of dispersal potential.

Fieldwork and Data Collection

The fieldwork for the project consists of research cruises along the west Antarctic Peninsula across three field seasons on board the RRS James Clark Ross. Three sites (Marine Cove, William Glacier and Sheldon Glacier) were selected for the fieldwork using available bathymetry and glacier retreat data. The fieldwork covers physical oceanography, marine geology, habitat mapping, community structure and seabed sediments and consists of CTD deployments, multi-beam swath bathymetry surveys, TOPAS sub-bottom profiling, shallow underwater camera system deployments, plankton net deployments, Agassiz trawls, Hamon grabs and multi-corer deployments.

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: