Cruise inventory

RRS Bransfield Bransfield 19921007

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Bransfield (74RD)
Cruise identifierBransfield 19921007
Cruise period1992-10-07 — 1992-11-04
StatusCompleted
Port of departureMontevideo, Uruguay
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
ObjectivesTo make acoustic tests of the Multi Year Recoverable Tidal Level Equipment (MYRTLE) in the area north of Elephant Island and to recover a releasable capsule if possible.

ACCLAIM is providing real time data from its network of sea level stations in the Southern Ocean as a contribution to the World Ocean Circulation Experiment (WOCE). The associated research work at POL is an integral part of the many other UK contributions to Core 2, the Southern Ocean component of WOCE, and interacts with international work from the United States, South Africa, Australia, France and Germany. The principal objective is to study variations in the flow of the ACC on large time and space scales but the ACCLAIM netweork is also a component of GLOSS and supplies sea level data which has provided a knowledge of tidal behaviour in this remote area.

ACCLAIM Bottom Pressure Recorders have been in place east of the Drake Passage between Port Stanley and Signy Island since 1988 and recovered/redployed in 1989, 1990 and 1991. Two BPR's were placed in the western part of the Drake Passage during 1991 (Foden 1992) as part of a Choke Point monitoring array which has US equivalents in the choke points south of Africa and Australia.

POL Cruise Objectives:
1. To recover 2 BPR/IES instruments deployed in 1991 in the western Drake Passage and redeploy these along the Choke Point line between Burdwood Bank and Elephant Island.
2. To recover 2 BPR's from th Scotia Sea.
3. To make a test deployment of the Multi Year Recoverable Tidal Level Equipment (MYRTLE) in the area north of Elephant Island and to recover a releasable capsule if possible.
4. To complete fieldwork on the island stations of the ACCLAIM network at Port Stanley, Signy Island and Faraday and do some provisional work at Rothera with a view to installing a station in 1993/1994.

The science work was completed on board the James Clark Ross. See the cruise report for more information.
Chief scientistPeter R Foden (Proudman Oceanographic Laboratory)
ProjectACCLAIM Antarctic Circumpolar Current Levels from Altimetry and Island Measurements
Cruise reportRRS Bransfield Bransfield 19921007 cruise report jr_oct92.pdf — access key 'C' (0.55 MB) 
Ocean/sea areas 
GeneralSouth West Atlantic Ocean (limit 20W)
Southern Ocean
Measurements 
Biology and fisheries 
Gear researchQuantity: number of deployments = 4
Description: 4 Benthos release systems were tested to a depth of 3000m using the 10 ton traction winch system.