Cruise inventory

RRS Discovery D276

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD276
Cruise period2003-12-08 — 2003-12-21
StatusCompleted
Port of departureFortaleza, Brazil
Port of returnRio de Janeiro, Brazil
PurposeResearch
ObjectivesThe cruise was a German contribution to the CLIVAR programme. The intention was to build upon the data gathered during the World Ocean Circulation Experiment. The spreading of Antarctic Bottom Water in the South Atlantic is seen as an integral limb of the global thermohaline circulation. During the last 30 years, there has been a marked rise in bottom water temperature which is thought to be significantly relevant for climate change. It was the purpose of the cruise to deploy two subsurface moorings at the entrance of the Vema Channel. They are designed to monitor physical property fluctuations during the coming 16 months.
Chief scientistWalter Zenk (Institute of Marine Sciences, Kiel)
ProjectCLIVAR - marine 2
Coordinating bodyBMBF Berlin through AWI Bremerhaven
Ocean/sea areas 
GeneralSouth Atlantic Ocean
SpecificRio Grande Passage; Rio Grande Rise; Vema Channel and extension; northern edge of Santos Plateau
Measurements 
Physical oceanography 
CTD stationsQuantity: number of profiles = 18
Description: Full depth, hydrographic and optical parameters, no LADCP. CTD stations were located in the Vema Channel extension and north of the Santos Plateau.
Subsurface temperature and salinity measurementsDescription: Hydrographic surface data were collected routinely and transmitted to the French CORIOLIS data centre at IFREMER in Brest. Data were made public globally in near-real time via GTS.
Moorings, landers, buoys 
Physical oceanography 
Current meters31° 15' 0" S  39° 19' 0" W — 4 current meters - near bottom subsurface moorings deployed on 17 December 2003
Current meters31° 16' 0" S  39° 27' 0" W — 3 current meters and 3 temp. loggers - near bottom subsurface moorings deployed on 17 December 2003
Other physical oceanographic measurements31° 16' 0" S  39° 27' 0" W — 3 current meters and 3 temp. loggers - near bottom subsurface moorings deployed on 17 December 2003