BODC Cruise Metadata Report for RRS James Clark Ross (74JC) cruise JR20031128 (JR93)
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 James Clark Ross (74JC) cruise JR20031128 (JR93) |
|---|---|
| Short name | JR20031128 (JR93) |
| Objectives and Narrative |
The Southern Ocean is a major component of the coupled ocean-atmosphere climate system. It connects all the other major oceans and influences the water mass characteristics of the deep water over a large proportion of the world. It is an area of net heat loss from the ocean to the atmosphere, and is the conduit for substantial heat and freshwater exchange between the ocean basins. The objectives of the cruise were: to observe the location of the surface and subsurface manifestations of the Polar Front; to observe the deep temperature distribution; to measure the baroclinic and barotropic transport of the ACC at Drake Passage; to determine the interannual variability by comparison with previous datasets; to relate these measurements to continuous time series from moorings maintained by POL; to relate these measurements to surface SST and SSH data acquired by satellites.
High quality CTD and salinity sample measurements were made at 30 stations across Drake Passage from Elephant Island to Burdwood Bank at the same positions as occupied in previous cruises. Stations were full-depth, to within 10 metres of the seabed, with a maximum spacing of 35 km and at 50 metre bathymetry increments on the continental slopes. One other test station was carried out in Drake Passage, and the RaTS station was occupied in Marguerite Bay. The CTD package included a single downlooking WH300 Lowered ADCP. Underway measurements included single-point bathymetry, thermosalinograph, surface meteorology and shipboard ADCP down to 320 metres. Opportunistic bathymetric mapping work and rock sample collection were also undertaken on this cruise leg lead by R Livermore, BAS (JR93). The hypothesis for JR93 was that the fragments of rock in Drake Passage may not be continental in origin and that they may not have existed during the early opening of the passage. The task during JR93 was to sample the biggest fragment, to determine its nature and age. This was achieved by: 1) bathymetric mapping, to examine the processes of crustal formation and search for sampling sites, 2) dredging any sediment-free areas of basement rock for samples. There are two Cruise Summary Reports for JR93 (4598) and JR94 (4597). |
| Ship | RRS James Clark Ross |
| Departure Port | Stanley, Falkland Islands (Malvinas) |
| Departure Date | 2003-11-28 |
| Arrival Port | Rothera, Antarctica |
| Arrival Date | 2003-12-06 |
| Principal Scientist(s) | Brian A King (Southampton Oceanography Centre) |
| Responsible Organisation | Southampton Oceanography Centre |
| Associated Project(s) | CLIVAR, Drake Passage repeats |
| IHB Sea Areas Visited | South Atlantic Ocean |
| Marsden Squares Visited | 485/486/521/522 |
| Work Area Description | 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 | |
|---|---|
| Bathythermograph |
Quantity:
number of profiles =
4
Description: XBTs |
| CTD stations |
Quantity:
number of stations =
32
Description: SBE CTD - temperature and salinity |
| Current profiler (eg ADCP) |
Quantity:
activity duration in days =
19
Description: Shipboard ADCP |
| Current profiler (eg ADCP) |
Quantity:
number of stations =
32
Description: Lowered ADCP - RDI Workhorse 300 KHz |
| Surface measurements underway (T,S) |
Quantity:
activity duration in days =
19
Description: Thermosalinographs |
| Water bottle stations |
Quantity:
number of stations =
32
Description: 10 bottles per station for sample salinity |
| Meteorology | |
| Incident radiation |
Quantity:
activity duration in days =
19
Description: Surface met |
| Routine standard measurements |
Quantity:
activity duration in days =
19
Description: Surface met |
| Geology and geophysics | |
| Dredge |
Quantity:
number of deployments =
6
Description: dredger |
| Magnetic measurements |
Quantity:
activity duration in days =
7
Description: towed magnetometer operated while ship underway |
| Multi-beam echosounding |
Quantity:
activity duration in days =
7
Description: swath bathymetry survey |
| Single-beam echosounding |
Quantity:
activity duration in days =
19
Description: Bathymetry - echo-sounder |
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 |
|---|---|---|
| 2 | CTD/STD cast |
Density of the water column Electrical conductivity of the water column Salinity of the water column Temperature of the water column Vertical spatial coordinates |
Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)
Full List
| BODC Reference | Instrument Description | Date/Time | Location | |
|---|---|---|---|---|
| 739764 | CTD/STD cast | 2003-12-01 12:47Z to 2003-12-01 13:50Z | 59° 1' S, 61° 10' W | Click for more |
| 739776 | CTD/STD cast | 2003-12-06 17:46Z to 2003-12-06 17:54Z | 67° 35' S, 68° 9' W | Click for more |
Project Database
No data currently held for this cruise in the BODC Project Database
