Scientific cruise report JR17001 RRS James Clark Ross NERC ICEBERGS & ORCHESTRA projects 2017 1 Report authors Barnes DKA1, Brearley A1, Firing Y2, Scourse J3, Biddle L4, Boniface M3, Clark M1, Dragomir OC2, Edmonston J1, Fitzmaurice A5, Goodall-Copestake W1, Hollyman P6, Howard F1, Janosik A7, M Maqueda8, A Mountford8, C Munoz-Ramirez9, Pieńkowski AJ10, Polfrey S1, Ramon Gonzalez A3, Rogerson L8, Sanders R1, Sanders R1, Sands CJ1, Sheen K3, Scott R1, Stephenson D2, Thomas S1 & K Van Landeghem6 1 British Antarctic Survey, NERC, Madingley Rd, Cambridge, UK 2 National Oceanography Centre, Southampton, UK 3 Exeter University, UK 4 University of Gothenburg, Sweden 5 Princeton University, USA 6 Bangor University, UK 7 University of West Florida, USA 8 Newcastle University, UK 9 Concepcion University, Chile 10 MacEwan University, Canada 21 Nov – 21 Dec 2017 Stanley (FI) – West Antarctic Peninsula – Punta Arenas (Chile) Happy 26th birthday JCR 2 Table of content 1. Overview ................................................................................................................................................. 6 2. List of personnel ..................................................................................................................................... 7 2.1. Scientific and technical cruise compliment ..................................................................................... 7 2.2. Rothera Station staff ........................................................................................................................ 8 2.3.Ship’s complement............................................................................................................................ 8 3. Timetable of events ................................................................................................................................. 9 4. Working area ......................................................................................................................................... 11 5. Introduction ........................................................................................................................................... 12 6. Equipment used and science areas ........................................................................................................ 16 6.1 Multibeam and Topas seabed mapping........................................................................................... 16 6.1 a) EM122 Multibeam Echosounder ................................................................................................ 17 Data acquisition ................................................................................................................................ 17 6.1 b) TOPAS (PS018) Sub-bottom Profiler ........................................................................................ 20 Data Acquisition ............................................................................................................................... 20 Problems Encountered ...................................................................................................................... 21 6.1 c) Expendable bathythermographs (XBT) ...................................................................................... 22 Data acquisition ................................................................................................................................ 22 Problems Encountered ...................................................................................................................... 23 References ......................................................................................................................................... 23 6.2 UK VMP-2000 Operations and Measurements .............................................................................. 23 6.2 a) Overview ..................................................................................................................................... 23 6.2 b) Operations ................................................................................................................................... 24 i Deployment and Recovery............................................................................................................. 24 ii Set-up ............................................................................................................................................ 24 iii Recommendations: ...................................................................................................................... 25 6.3 ICEBERGS physics: CTD, VMADCP, and oxygen isotopes ........................................................ 26 6.4 Microplastics ................................................................................................................................... 28 6.5 Micropalaeontology & biogeochemistry ........................................................................................ 30 6.6 Plankton (N70) net .......................................................................................................................... 31 6.7 Hamon Grab .................................................................................................................................... 34 6.8 Shelf Underwater Camera System (SUCS) .................................................................................... 38 6.9 MiniAgassiz Trawl.......................................................................................................................... 40 6.10 MULTI-CORER ........................................................................................................................... 44 3 7. Chilean collaboration ............................................................................................................................ 48 7.1 Bioenergetics................................................................................................................................... 48 7.2 Genetics........................................................................................................................................... 48 7.3 Sampling on the JCR ...................................................................................................................... 49 8. ICEBERGS photography and film........................................................................................................ 51 9. ICEBERGS Outreach............................................................................................................................ 54 9.1 Twitter ............................................................................................................................................. 54 9.2 Blog ................................................................................................................................................. 55 9.3 School link-up ................................................................................................................................. 55 10. ORCHESTRA I: air-sea fluxes and mixed layer processes ................................................................ 56 10.1 Glider and WaveGlider Operations .............................................................................................. 56 10.1 a) Overview ................................................................................................................................... 56 10.1 b) WaveGlider Description ........................................................................................................... 58 10.1 c) Setup ......................................................................................................................................... 62 10.1 d) Deployment .............................................................................................................................. 65 10.1 e) Sampling strategy ..................................................................................................................... 66 10.1 f) Post-deployment ........................................................................................................................ 68 10.1 g) Waveglider mission narrative ................................................................................................... 68 10.1 h) Data processing......................................................................................................................... 69 10.1 j) Leak of 408 ................................................................................................................................ 70 10.1 k) Abort of Slocum unit 424 ......................................................................................................... 70 10.1 l) Recovery of 408 and 424 ........................................................................................................... 71 10.1 m) Inspection of 408 and 424 after recovery ................................................................................ 71 10.2 Plymouth Marine Laboratory Met Sensors Operations ................................................................ 73 11. Void..................................................................................................................................................... 74 12. ORCHESTRA II – ocean inventories and transports ......................................................................... 74 12.1 Introduction ..................................................................................................................................