| Title | Processed SADCP data from the Marion Island Annual Relief Voyage on the SA Agulhas II Voyage 024, April 2017 |
|---|---|
| Project | Marion Island Relief Voyage |
| Authors |
Hans Verheye |
| Publisher | Department of Forestry, Fisheries and the Environment (2022) |
| Contributors |
Contact Person: Tarron Lamont Contact Person: Jenny Huggett |
| Abstract | This is processed Shipboard Acoustic Doppler Current Profiler (SADCP) data from the Marion Island Annual Relief Voyage on the MV SA Agulhas II Voyage 024, 06 April to 12 May 2017. The 2017 Marion Relief Voyage offered the fifth opportunity to conduct multi-disciplinary, shipbased marine research focusing on links and interactions between air and sea, ocean physics, chemistry, biogeochemistry and biology, including microbial, planktic and benthic communities on board South Africa’s polar research and supply vessel MV SA Agulhas II en route to, and around, the sub-Antarctic Prince Edward archipelago. The overall aim was to continue contributing to an oceanographic observation and monitoring system directed by South African research institutions in support of South Africa’s needs – and where possible, in support of global requirements of inter alia the Global Oceans Observing System (GOOS), the Southern Ocean Observing System (SOOS), the Convention for the Conservation of Antarctic Marine Living Resources (CCAMLR), and the Agreement on the Conservation of Albatrosses and Petrels (ACAP). With the declaration on 9 April 2013 of the Prince Edward Islands (PEIs) as South Africa’s first offshore Marine Protected Area (MPA), the outcomes of this cruise will further contribute toward an integrated view and a better understanding of the functioning of the combined island/marine PEI ecosystem. This dataset was processed using older standards which may not align with international best practices and the standards currently adhered to by the Department of Forestry, Fisheries and the Environment (DFFE). The Department is re-processing and replacing data to ensure everything has the same format and is of the same quality and datasets will be marked as obsoleted once that is done. As such the user assumes the entire risk related to the use of these data in its current state and format. DFFE disclaims all warranties of the data whether expressed or implied, including without limitation, any warranties of merchantability or fitness for a particular purpose. For any concerns regarding the data, the user may decide to liaise with the listed PIs who will share their insight on the data quality, where possible. It is also strongly recommended that the user liaises with the listed PIs regarding their proposed projects to mitigate against duplication of research efforts. |
| Methods | The data was collected from a seventy five kilohertz ADCP (Acoustic Doppler Current Profiler) mounted on a drop keel below the ship, 12m below the water line. Typically the ADCP is switched on when the ship leaves port and turned off when the ship returns. The netCDF file contains information about the set-up (bin size, number of bins, sampling frequency etc) and is COARDS (Cooperative Ocean/Atmosphere Research Data Service) compliant. This data was processed from the LTA (long term average) files using CODAS (Common Ocean Data Acquisition System). This procedure included:- bottom detection,- manual spike removal, and- CODAS recalibration. |
| Data | |
| Temporal extent | 06 Apr 2017 – 12 May 2017 |
| Geographic extent |
South Indian Ocean, Prince Edward Islands
North: -34.998 |
| Keywords | INDIAN OCEAN, SA Agulhas II, SA Agulhas II 024, SADCP, Shipboard Acoustic Doppler Current Profilers |
| Related resources |
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