RRS James Clark Ross Cruise 115, 01 Dec-19 Dec 2004. Drake Passage repeat hydrography: WOCE Southern Repeat Section 1b - Burdwood Bank to Elephant Island

This report describes the tenth occupation of the Drake Passage section, established during the World Ocean Circulation Experiment as repeat section SR1b. It was first occupied by Southampton Oceanography Centre in collaboration with the British Antarctic Survey in 1993, and has been re-occupied most years. Thirty-five full depth stations were completed, and 2 repeat shallow stations for biogeochemical sampling only. The full depth stations included a test station, the 30 stations for the SR1b Drake Passage section, with three repeat stations south of Burdwood Bank and one station in the ice in the Bellingshausen Sea for Dr. Mark Brandon. The CTD was a Sea-Bird 911plus with dual temperature and conductivity sensors, an altimeter, an oxygen sensor, a PAR (photosynthetically active radiation) sensor and a fluorometer. For 27 of the 30 SR1b stations LADCP data was also collected. The LADCP was a downward looking RDI Workhorse WH300 ADCP (WH) unit. Various underway measurements included navigation, VM-ADCP, sea surface temperature and salinity, water depth and meteorological parameters.