Cruise inventory

RRS James Clark Ross JR19980212 (JR29)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR19980212 (JR29)
Cruise period1998-02-12 — 1998-03-04
Port of departureStanley, Falkland Islands (Malvinas)
Port of returnStanley, Falkland Islands (Malvinas)
ObjectivesThe aim was to collect cores using a shallow rock drill and vibrocorer from offshore King George Island in the South Shetland Islands and also from off Seymour Island in the northern Weddell Sea.

Apart from two proton magnetometer and surface water sampling operations en passage between the Falklands and South Shetland Islnads, cruise JR29 was confined to areas of the northern Antarctic Peninsula. Around King George Island, surveys were conducted in the vicinity of Cape Melville (Melville Shelf), along the deep axial portion of King George Bay, along the western side of King George Bay (Polonez-Lions Rump Shelf), along the outer shelf between Low Head and the entrance to Admirality Bay (seismics only), and along the deep axial portion of Admirality Bay. A separate survey was conducted on the slope and distal shelf of eastern Bransfield Strait (Bransfield Margin). Because of obstructive sea ice iit was not possible to undertake work planned NE of Seymour Island: a sole Sparker traverse was run and sampling carried out at one site. During the period in which JCR remained in the area in expectation the the wind directions would change and carry the sea ice edge farther south, a short Sparker line and one vibrocore were collected in the northern Erebus and Terror Gulf. Finally, a speculative Sparker traverse was run along the western side of Antarctic Sound, although it was discontinuous to avoid areas of sea ice. Separate reports on the rockdrill/vibrocore and geophysical surveys have been prepared and submitted to BAS by the BGS team, and the guest scientists.
Chief scientistRichard V Dingle (British Antarctic Survey)
ProjectMarine Geology - Bransfield Strait and North West Weddell Sea
Coordinating bodyBAS
Cruise reportRRS James Clark Ross JR19980212 (JR29) cruise report jr29.pdf — access key 'C' (23.44 MB) 
Ocean/sea areas 
GeneralSouth Atlantic Ocean
SpecificSouthern Ocean
Biology and fisheries 
ZooplanktonDescription: Plankton sampling was carried out throughout the cruise. No. of samples not noted.
Geology and geophysics 
Core - soft bottomDescription: A number of cores were made during the cruise. No. of cores not noted.
Magnetic measurementsDescription: A magnetometer was streamed throughout the cruise. No. of profiles not noted.