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JR177 Discovery 2010 Summer Cruise. Big Ideas To classify pelagic communities and foodwebs within different environments and across seasons within the.

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Presentation on theme: "JR177 Discovery 2010 Summer Cruise. Big Ideas To classify pelagic communities and foodwebs within different environments and across seasons within the."— Presentation transcript:

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

4 ERS altimeter tracks over Scotia Sea

5 SEAWifS JR161 – track achieved

6 JR161 - Sea Surface Temperature

7 JR 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 Iron work (NOC – AFI CGS) – 2 berths Evgeny Pakhomov (UBC) – 1– jellies and fish Dorothee Bakker (UEA) – 1 berth Ezio Rosato (Leicester – Full AFI) – 1 berth Full AFI AFI - CGS Collaborations

9 JR177 Provisional Personnel Nutrients, phytoplankton, iron Korb, Whitehouse, Gordon, Bibby, Neilsdottir MesozooplantkonWard, Hirst, Shreeve, Tarling Macrozooplantkon/krillFielding, Watkins, Atkinson, Pakhomov NektonCollins, Stowasser OceanographyVenables, AN Other (a), Jones BiochemistryPond Data managementCunningham Moorings and sampling gearEnderlein Higher predators/whalesAN Other (b), AN Other (c’) Total 24 personnel (to fit into 11 single cabins; 4 double cabins, 1-2 PSO cabin) Krill AFIGaten

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 Time 01:00 02:00 03:00 04:00 05:00 06:00 07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 20:00 21:00 22:00 23:00 24:00 Provisional Station Activities Acoustic and UOR survey Day 1 RMT Target fishing

12 TimeDay 1Day 2Day 3Day 4 01:00MOCNESSRMT 25 RMT 25 target fishing 02:000 – 1000 mTarget fishingDepth stratified 03:00 LHPR1000 – 400 mMooring 04:00Tow Fish0 – 1000m400 – 0 mDeployment 05:00FRRF darkness 120 m 06:00 FRRF 120 m 07:00CTD – 10 m off sea bed 08:00 09:00CTD 140 m 10:00 RMT 25 11:00Go Flo Depth stratified day 12:00 13:00FRRF – daylight 120 m 14:00CTD – HPLC 2000 m 15:00 Acoustic Survey 16:00 CTD 140 mMOCNESS 0 – 1000mLHPR - daylight 17:00Bongo 3 * 400 m 18:00Mini bongo 1 * 400 m 19:00RMT 25Bongo 3 * 400 m 20:00Target fishing 21:00 RMT 25 22:00 Target fishing 23:00 RMT 25 24:00 Depth stratified night 4 Day Process Station Activities


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