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JR177 Discovery 2010 Summer Cruise

JR177 Discovery 2010 Summer Cruise. Big Ideas. To classify pelagic communities and foodwebs within different environments and across seasons within the Scotia Sea. To collect body condition indices and other parameters to examine life-cycle flexibility across the Scotia Sea.

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JR177 Discovery 2010 Summer Cruise

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  1. JR177Discovery 2010 Summer Cruise

  2. Big Ideas • To classify pelagic communities and foodwebs within different • environments and across seasons within the Scotia Sea • To collect body condition indices and other parameters to examine • life-cycle flexibility across the Scotia Sea • To examine physical variability as a forcing factor in • pelagic community variability

  3. Core objectives of JR177 1 • To carry out a core sampling strategy that:- • Allows comparison across the range of Scotia Sea environments • Allows comparisons across seasons • Linkage between different trophic levels (primary, secondary, higher) To determine different scales of variability in physical and biological parameters (large scale - water masses, mesoscale - around stations, small scale – krill swarms) 2 3 • To characterise the main drivers of variability • Physical characterisation of core transect – calibrated against satellite data • Macro- and micro-nutrient characterisation (including iron) 4 Determine flux within the context of pelagic food web processes

  4. ERS altimeter tracks over Scotia Sea

  5. JR161 – track achieved SEAWifS

  6. JR161 - Sea Surface Temperature

  7. JR177 • 48 days for core science (46 when taking mob/demob into account) • (this includes 3 days for DIMES) • Core box time (+ calibration) is split out into an additional cruise • = JR185 • JR185 will be done before Xmas, JR177 after Xmas

  8. JR177 – external requests Full AFI • Ezio Rosato (Leicester – Full AFI) – 1 berth AFI - CGS • Iron work (NOC – AFI CGS) – 2 berths • Dorothee Bakker (UEA) – 1 berth Collaborations • Evgeny Pakhomov (UBC) – 1– jellies and fish

  9. JR177 Provisional Personnel Nutrients, phytoplankton , iron Korb, Whitehouse, Gordon, Bibby, Neilsdottir Biochemistry Pond Mesozooplantkon Ward, Hirst, Shreeve, Tarling Macrozooplantkon/krill Fielding, Watkins, Atkinson, Pakhomov Nekton Collins, Stowasser Oceanography Venables, AN Other (a), Jones Data management Cunningham Moorings and sampling gear Enderlein Higher predators/whales AN Other (b), AN Other (c’) Krill AFI Gaten Total 24 personnel (to fit into 11 single cabins; 4 double cabins, 1-2 PSO cabin)

  10. Proposed JR177 track 12 stations occupied for ~2.5d each (extra time for 2 mooring stations) 7 stations at same positions as JR161 5 stations to be positioned responsively

  11. Provisional Station Activities Day 2 Day 3 01:00 LHPR RMT 25 MOCNESS 02:00 Tow fish Depth stratified 03:00 04:00 05:00 06:00 FRRF CTD CTD Bongo Go Flo FRRF RMT 25 Depth Stratified MOCNESS Minibongo RMT Target fishing LHPR RMT 25 Target fishing RMT Target fishing 22:00 23:00 24:00 LHPR Day 1 Time Acoustic and UOR survey 07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 RMT Target fishing 18:00 19:00 20:00 21:00

  12. 4 Day Process Station Activities Time Day 1 Day 2 Day 3 Day 4 01:00 MOCNESS RMT 25 RMT 25 RMT 25 target fishing 02:00 0 – 1000 m Target fishing Depth stratified 03:00 LHPR 1000 – 400 m Mooring 04:00 Tow Fish 0 – 1000m 400 – 0 m Deployment 05:00 FRRF darkness 120 m 06:00 FRRF 120 m 07:00 CTD – 10 m off sea bed CTD – 10 m off sea bed CTD – 10 m off sea bed 08:00 09:00 CTD 140 m CTD 140 m CTD 140 m 10:00 RMT 25 11:00 Go Flo Go Flo Go Flo Depth stratified day 12:00 13:00 FRRF – daylight 120 m FRRF – daylight 120 m FRRF – daylight 120 m 14:00 CTD – HPLC 2000 m CTD – HPLC 2000 m CTD – HPLC 2000 m 15:00 Acoustic Survey 16:00 CTD 140 m MOCNESS 0 – 1000m LHPR - daylight 17:00 Bongo 3 * 400 m 18:00 Mini bongo 1 * 400 m 19:00 RMT 25 Bongo 3 * 400 m Bongo 3 * 400 m 20:00 Target fishing 21:00 RMT 25 RMT 25 RMT 25 22:00 Target fishing Target fishing Target fishing 23:00 RMT 25 24:00 Depth stratified night

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