JR177 Discovery 2010 Summer Cruise. Big Ideas To classify pelagic communities and foodwebs within...
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Transcript of JR177 Discovery 2010 Summer Cruise. Big Ideas To classify pelagic communities and foodwebs within...
JR177Discovery 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
•To examine physical variability as a forcing factor in pelagic community variability
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 processes4
ERS altimeter tracks over Scotia Sea
SEAWifS
JR161 – track achieved
JR161 - Sea Surface Temperature
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
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
JR177 Provisional PersonnelNutrients, phytoplankton , iron Korb, Whitehouse, Gordon, Bibby, Neilsdottir
Mesozooplantkon Ward, Hirst, Shreeve, Tarling
Macrozooplantkon/krill Fielding, Watkins, Atkinson, Pakhomov
Nekton Collins, Stowasser
Oceanography Venables, AN Other (a), Jones
Biochemistry Pond
Data management Cunningham
Moorings and sampling gear Enderlein
Higher predators/whales AN Other (b), AN Other (c’)
Total 24 personnel(to fit into 11 single cabins; 4 double cabins, 1-2 PSO cabin)
Krill AFI Gaten
Proposed JR177 track
12 stations occupied for ~2.5d each (extra time for 2 mooring stations)
7 stations at same positions as JR1615 stations to be positioned responsively
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
Day 2 Day 3
LHPR RMT 25
Tow fish Depth stratified
MOCNESS
FRRF
CTD CTD
Bongo
Go Flo
FRRF RMT 25
Depth Stratified
MOCNESS
Minibongo RMT Target fishing
LHPR
RMT 25 Target fishing RMT Target fishing
LHPR
Provisional Station Activities
Acoustic and UOR survey
Day 1
RMT Target fishing
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
4 Day Process Station Activities