Cruise inventory

RRS James Clark Ross JR20051226 (JR151)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR20051226 (JR151)
Cruise period2005-12-26 — 2005-12-27
StatusCompleted
PurposeResearch
ObjectivesThe purpose of cruise JR151 was to deploy three moorings across Orkney Passage, to monitor the outflow of Weddell Sea Deep Water from the Weddell Sea into the Scotia Sea. BAS had entered an agreement with Lamont-Doherty Earth Observatory of Columbia University to cooperate on these moorings, in which we were to retrieve an LDEO mooring, M4, from Orkney Passage, refurbish the instruments, download the data, and then redeploy the instruments on the new moorings, extending from the middle of Orkney Passage and onto the slope towards the west. One day of ship time was allocated to this work. This planning was all made under the assumption that Orkney Passage would be ice free. However, at the time of the cruise, late December 2005, the whole area south and east of the South Orkneys was filled with ice, largely multiyear, that had blown up from the Weddell Sea, making Orkney Passage inaccessible within the allocated time for the cruise. A decision was therefore made to go to the area north of Coronation Island instead, and to do a CTD survey of the slope here, and, if moorings were deemed useful in this location, two moorings could be deployed here. The ship entered a lead around 7:00 on 26/12/2005, and was able to proceed to the first CTD station at around 4000 m depth at 08:37. Three more CTDs were taken at around 3500, 3000, and 2500 m depth along a course of 200°. Based on the preliminary processing of these CTDs, two moorings were deployed at approx. 4000 and 3500 m depth. These moorings are referred to as CI1 and CI2, respectively. The mooring deployments were completed at midnight on 27/12/2005, and after verifying that the mooring had landed on the seabed and the acoustic release was communicating with the deck unit, the ship proceeded toward Bird Island to commence JR140.
Chief scientistPovl Abrahamsen (British Antarctic Survey)
Coordinating bodyBritish Antarctic Survey (BAS)
Cruise reportRRS James Clark Ross JR20051226 (JR151) cruise report jr151.pdf — access key 'C' (0.63 MB) 
Ocean/sea areas 
GeneralSouth West Atlantic Ocean (limit 20W)
SpecificWeddell Sea
Data held at BODC 
Series/Profiles 
3  Acoustic current meter
Platform or instrument orientation
Electrical conductivity of the water column
Salinity of the water column
Horizontal velocity of the water column (currents)
Temperature of the water column
Reference numbers
Date and time
Platform or instrument orientation
Electrical conductivity of the water column
Salinity of the water column
Horizontal velocity of the water column (currents)
Temperature of the water column
Reference numbers
Date and time

BODC idDate/TimeLocationDoc.
16181292005-12-27 00:59  — 2007-02-24 14:49 60° 16' 22" S  45° 15' 45" W  View metadata report for BODC series reference number 1618129
16181302005-12-27 01:00  — 2007-02-24 14:57 60° 16' 22" S  45° 15' 45" W  View metadata report for BODC series reference number 1618130
16181422005-12-26 22:19  — 2007-02-24 14:04 60° 17' 41" S  45° 15' 21" W  View metadata report for BODC series reference number 1618142
2  Moored CTD
Sea level
Temperature of the water column
Reference numbers
Date and time
Sea level
Temperature of the water column
Reference numbers
Date and time

BODC idDate/TimeLocationDoc.
12231762005-12-27 00:34:59  — 2007-02-24 15:50 60° 16' 22" S  45° 15' 45" W  View metadata report for BODC series reference number 1223176
12231882005-12-26 22:25  — 2007-02-24 17:50 60° 17' 41" S  45° 15' 21" W  View metadata report for BODC series reference number 1223188
2  Paddle wheel current meter
Moored instrument depth
Horizontal velocity of the water column (currents)
Temperature of the water column
Reference numbers
Date and time
Moored instrument depth
Horizontal velocity of the water column (currents)
Temperature of the water column
Reference numbers
Date and time

BODC idDate/TimeLocationDoc.
13688052005-12-27 02:00  — 2007-02-24 14:46 60° 16' 22" S  45° 15' 45" W  View metadata report for BODC series reference number 1368805
13688172005-12-26 23:00  — 2007-02-24 16:02 60° 17' 41" S  42° 15' 21" W  View metadata report for BODC series reference number 1368817