BODC Cruise Metadata Report for RRS Discovery cruise DY088
Introduction
This report collates information from the BODC cruise inventory and oceanographic databases. It presents
- Cruise Inventory Information
- A summary of BODC data holdings for the cruise from the
- References - including cruise tracks and cruise reports
Cruise Inventory Information
| Long name | RRS Discovery cruise DY088 |
|---|---|
| Short name | DY088 |
| Objectives and Narrative |
Determining the tectonic history of the basins and bathymetric highs of the South Scotia Ridge is essential to understand the paleo-current history of cold dense waters which escape the Weddell Sea and connect with the Atlantic Ocean, as well as understanding the pre-break up configuration of the South America - Antarctic Peninsula land bridge and how and when the South Scotia Ridge formed.
Determining the origin of these blocks requires direct sampling by dredging for petrological, geochemical and geochronological study. Discovery Bank was the prime target for dredge sampling followed by Bruce and Pirrie banks. Sampling of sediments deposited on the basement highs for biostratigraphic, petrological and geochemical/isotopic work also has the potential to record past changes in ocean circulation (Antarctic Circumpolar Current influence vs stronger Weddell Sea influence), productivity and sea-ice extent with emphasis on the most recent periods of glacial enhancement of the West Antarctic Ice Sheet and warm interglacials. This work would complement IODP Leg 382, scheduled for 2019, to drill sediments deposited in the basins bordered by Bruce and Pirie banks. Geophysical surveys and direct sampling of sediments of the South Orkney Plateau (SOP) will investigate glacial landforms in troughs that were created by fast-flowing ice during the last glaciation (c. 20 000 years ago). For example, suites of small (<5 m high) moraines, which can only be identified by high-resolution 3D mapping of the seafloor and sub-surface sediments, indicate "episodic" retreat of grounded ice back towards the landmasses. By taking seafloor cores targeted to sample the transition between subglacial and postglacial sediments we can add a chronology of South Orkney ice cap retreat to the record provided by the glacial landforms; longer cores can be used to identify significant climatic/oceanographic changes that may have driven the retreat. |
| Ship | RRS Discovery |
| Departure Port | Punta Arenas, Chile |
| Departure Date | 2018-03-07 |
| Arrival Port | Punta Arenas, Chile |
| Arrival Date | 2018-04-02 |
| Principal Scientist(s) | Teal R Riley (British Antarctic Survey) |
| Responsible Organisation | British Antarctic Survey |
| Associated Project(s) | |
| IHB Sea Areas Visited | South West Atlantic Ocean (limit 20W), Southern Ocean |
| Marsden Squares Visited | 483/484/485/486/487/519/520 |
| Work Area Description | Scotia Sea, Atlantic sector of the Southern Ocean |
| Unable to lookup cruise bounds at this time | |
| Work Area Bounding Polygon | |
| Southern Limit | unknown |
| Northern Limit | unknown |
| Western Limit | unknown |
| Eastern Limit | unknown |
Cruise Inventory Datasets
| Physical oceanography | |
|---|---|
| Other physical oceanographic measurements |
Quantity:
activity duration in days =
12
Description: Sound velocity probe measurements |
| Geology and geophysics | |
| Core - soft bottom |
Quantity:
number of stations =
32
Description: Gravity and box core sampling |
| Dredge |
Quantity:
number of stations =
15
Description: Geological dredge sampling |
| Gravity measurements |
Quantity:
activity duration in days =
16
Description: Gravimeter |
| Magnetic measurements |
Quantity:
activity duration in days =
12
Description: Magnetometer deployment |
| Multi-beam echosounding |
Quantity:
activity duration in days =
16
Description: EM122/710 swath bathymetry data |
Cruise Inventory Mooring/Buoy Operations
No information on datasets is currently available
Summary of BODC Data Holdings for the Cruise
National Oceanographic Database
Summary
| # Series | Instrument Description | Parameters |
|---|---|---|
| 1 | Meteorological data logger |
Air pressure Air temperature Atmospheric humidity Date and time Horizontal spatial co-ordinates Raw light meter output Solar Radiation Visible waveband radiance and irradiance measurements in the atmosphere Wind strength and direction |
| 1 | Multi-beam echosounder |
Bathymetry and Elevation Date and time Horizontal platform movement Horizontal spatial co-ordinates Platform or instrument orientation |
| 1 | Multiple instrument types |
Chlorophyll pigment concentrations in water bodies Date and time Electrical conductivity of the water column Horizontal spatial co-ordinates Metadata parameters Raw fluorometer output Raw suspended particulate material concentration sensor output Salinity of the water column Temperature of the water column Transmittance and attenuance of the water column |
Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)
Full List
| BODC Reference | Instrument Description | Date/Time | Location | |
|---|---|---|---|---|
| 1844187 | Multi-beam echosounder | 2018-03-07 21:50Z to 2018-04-02 11:40Z | 61° 43' S to 52° 21' S; 70° 54' W to 34° 46' W | Click for more |
| 1844199 | Meteorological data logger | 2018-03-07 21:50Z to 2018-04-02 11:40Z | 61° 43' S to 52° 21' S; 70° 54' W to 34° 46' W | Click for more |
| 1844206 | Multiple instrument types | 2018-03-07 21:50Z to 2018-04-02 11:40Z | 61° 43' S to 52° 21' S; 70° 54' W to 34° 46' W | Click for more |
Project Database
No data currently held for this cruise in the BODC Project Database
