Metadata Report for BODC Series Reference Number 1972325

• 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.

RRS James Clark Ross JR18002 ORCHESTRA Lowered Acoustic Doppler Current Profiler (LADCP): BODC Processing

The LADCP data were supplied to BODC as 53 matlab files and were converted to the BODC internal format. The following table shows how the variables within the files were mapped to appropriate BODC parameter codes:

All reformatted data were visualised using the in-house Edserplo software and screened for suspect and missing data.

Please note that raw LADCP files and processed files using University of Hawaii's LADCP processing software are available on request.

RRS James Clark Ross JR18002 ORCHESTRA Lowered Acoustic Doppler Current Profiler (LADCP): Originators Data Processing

Sampling Strategy

A total of 71 LADCP stations were completed during JR18002. A 300 kHz Workhorse Monitor lowered acoustic Doppler current profiler (LADCP) was attached onto the CTD frame in a downward-looking configuration. Before each cast a pre-deployment script was run to test that the internal electronics were performing correctly.

Data Processing

The binary files recorded by the instrument were downloaded onto the local computer after each cast. All data were processed using matlab code developed at Lamont-Doherty Earth Observatory by Martin Visbeck and updated by Andreas Thurnherr (Version LDEO_IX 13). This package calculates velocity based on both shear and inversion methods. Processing was carried out using four sets of constraints:

• ship navigation
• ship navigation and bottom tracking
• ship navigation and vessel-mounted ADCP
• ship navigation, bottom tracking and vessel-mounted ADCP

Further information on the LADCP processing can be found in pages 20-22 of the cruise report.

Project Information

Radium in Changing Environments: A Novel Tracer of Iron Fluxes at Ocean Margins (RaCE:TraX)

Background

Radium in Changing Environments: A Novel Tracer of Iron Fluxes at Ocean Margins (RaCE:TraX) is a NERC (Natural Environment Research Council) funded project which involves using Radium (Ra) as a tracer to better understand the cycling of Iron (Fe) in the marine environment.

This project aims to answer three key questions to fill the gaps in our knowledge of the Fe cycle:

• How much Fe comes from continental shelf sediments?
• How much Fe is supplied by glacial meltwater?
• How rapidly is Fe scavenged from the metal-rich fluids at hydrothermal vents?

NERC Grant Reference NE/P017630/1 'Radium in Changing Environments: A Novel Tracer of Iron Fluxes at Ocean Margins'.

Participants

This project was a collaboration between AL Annett, University of Southampton (Lead Principal Investigator) and additional project members and cruise participants from the University of Southampton and the University of Bristol.

Fieldwork

Data has been collected on the James Clark Ross cruise JR18002

RaCE:TraX aim for this cruise was to measure Ra and Actinium (Ac) isotope ratios from samples across the Drake passage, to be used along with samples from the Western Antarctic Peninsula (Cruise JR18003) to determine the origin of Fe in the Antarctic Circumpolar Current.

Data Activity or Cruise Information

Cruise

Complete Cruise Metadata Report is available here

Fixed Station Information

Fixed Station Information

World Ocean Circulation Experiment (WOCE) Southern Repeat Section 1B - Falkland Islands to Elephant Island

WOCE Southern Repeat Section 1B is a section across Drake Passage in the South Atlantic Ocean. The nominal end points of the section (to date) are at 52° 55.74' S, 58° 00.00' W (at the south of the Falkland Islands) and 61° 03.05' S, 54° 33.10' W (off Elephant Island at the north end of the Antarctic Peninsula).

The section was first occupied by the R/V Polarstern in 1992 (Gersonde, 1993). The first UK occupation of SR1b followed on RRS Discovery later the same year. The National Oceanography Centre, Southampton (formerly known as Southampton Oceanography Centre), in collaboration with the British Antarctic Survey, have occupied the section most years since 1993 on the RRS James Clark Ross. Additionally, there were three Spanish occupations on R/V Hespérides in February 1995, 1996 and 1998 (Garcia et al., 2002). A Drake Passage summary report for RRS James Clark Ross cruises between 1993 - 2000 has been produced.

A table of cruises which occupied SR1b is presented below with links to the relevant cruise reports (were available).

References

García, M. A., I. Bladé, A. Cruzado, Z. Velásquez, H. García, J. Puigdefàbregas and J. Sospedra, 2002: Observed variability of water properties and transports on the World Ocean Circulation Experiment SR1b section across the Antarctic Circumpolar Current. J. Geophys. Res. 107 (C10) 3162, 10.1029/2000JC000277.

Gersonde, R., 1993: The Expedition Antarktis X/5 of RV Polarstern in 1992. Berichte zur Polarforschung, 131, 167 pp.

Related Fixed Station activities are detailed in Appendix 1

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: Drake Passage - WOCE SR1b

Related series for this Fixed Station 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.