Resources

RRS James Clark Ross JR19980114 (JR28)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR19980114 (JR28)
Cruise period1998-01-14 — 1998-02-07
StatusCompleted
Port of departureStanley, Falkland Islands (Malvinas)
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
ObjectivesThe Pelagic Ecosystem Studies Core Programme is aimed understanding the processes generating variability in the South Georgia marine ecosystem, with a particular emphasis on the interannual variation. JR28 was the third execution of the programme.

The ship steamed to the head of a standard oceanographic transect just to the north of the Maurice Ewing Bank (MEB). The transect consisted of 22 hydrographic stations, 35km apart. On each station a CTD profile with water bottle samples was taken to generate profiles of standard physical characters and allow chemical analyses and the determination of chlorophyll concentration. There was also simultaneous squid jigging undertaken. Zooplankton net hauls were used to characterise the zooplankton community on each station and a chlorophyll fluorescence profile was also obtained using an Aquapack system. On a number of stations extra water and zooplankton samples were obtained for detailed biochemical analyses. In the vicinity of South Georgia surveys of two mesoscale (80 x 80km) boxes consisting of 5 sets of paired transects were conducted. A towed undulating oceanographic recorder (UOR) was used to characterise the upper150 m water characteristics and a multifrequency acoustic system was used to describe the distribution of krill and other acoustic scatterers. Underway chemistry and standard analyses of the surface water were also undertaken. A series of standard station activities of CTD, water bottle samples, RMT8 and zooplankton net hauls were carried out at on-shelf and off-shelf stations within each survey area. Transecting was also undertaken to characterise the region of the north shelf not included in the survey boxes. Experimental work on zooplankton grazing, excretion and development rates was also undertaken. Most of the data were validated and calibrated at sea and are available for comparative analyses with data from the previous two seasons. The preliminary figures indicate that there are some significant differences from earlier surveys in both the physical and biological regimes.
Chief scientistJulian Priddle (British Antarctic Survey)
ProjectPES Core Programme II
Coordinating bodyBritish Antarctic Survey (BAS)
Cruise reportRRS James Clark Ross JR19980114 (JR28) cruise report jr028.pdf (0.72 MB) 
Ocean/sea areas 
GeneralSouth Atlantic Ocean
SpecificSouthern Ocean
Data held at BODC Get data
Series/Profiles 
39  Bottle station
Reference numbers
Nitrite concentration parameters in the water column
Vertical spatial coordinates
Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Ammonium and ammonia concentration parameters in water bodies
Nitrate concentration parameters in the water column
Quality control flags
Reference numbers
Nitrite concentration parameters in the water column
Vertical spatial coordinates
Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Ammonium and ammonia concentration parameters in water bodies
Nitrate concentration parameters in the water column
Quality control flags

BODC idDate/TimeLocationDoc.
22937371998-01-19 03:48:30 50° 11' 13" S  41° 44' 13" W  View metadata report for BODC series reference number 2293737
22937861998-01-20 06:11:30 51° 36' 54" S  40° 36' 28" W  View metadata report for BODC series reference number 2293786
22938051998-01-20 16:11:30 52° 9' 35" S  40° 9' 35" W  View metadata report for BODC series reference number 2293805
22938661998-01-21 23:20 53° 53' 38" S  38° 39' 32" W  View metadata report for BODC series reference number 2293866
22939091998-01-25 22:25:30 54° 15' 0" S  35° 43' 47" W  View metadata report for BODC series reference number 2293909
22940581998-02-03 03:38 53° 42' 36" S  37° 58' 11" W  View metadata report for BODC series reference number 2294058
22937011998-01-18 14:38:30 49° 19' 40" S  42° 23' 2" W  View metadata report for BODC series reference number 2293701
22940101998-02-01 04:04 53° 47' 23" S  38° 34' 47" W  View metadata report for BODC series reference number 2294010
22936701998-01-17 21:42 48° 27' 46" S  42° 55' 37" W  View metadata report for BODC series reference number 2293670
22936821998-01-18 04:19:30 48° 44' 20" S  42° 45' 43" W  View metadata report for BODC series reference number 2293682
22938911998-01-25 05:25:30 54° 4' 47" S  35° 55' 12" W  View metadata report for BODC series reference number 2293891
22939221998-01-26 22:27 54° 11' 23" S  35° 2' 59" W  View metadata report for BODC series reference number 2293922
22939581998-01-28 04:00 54° 19' 47" S  34° 52' 48" W  View metadata report for BODC series reference number 2293958
22939711998-01-28 19:17 54° 21' 35" S  34° 27' 0" W  View metadata report for BODC series reference number 2293971
22939951998-01-31 04:12:30 53° 28' 11" S  38° 59' 24" W  View metadata report for BODC series reference number 2293995
22936571998-01-17 11:03 47° 52' 55" S  43° 20' 6" W  View metadata report for BODC series reference number 2293657
22937491998-01-19 08:13 50° 27' 50" S  41° 31' 44" W  View metadata report for BODC series reference number 2293749
22937501998-01-19 13:34 50° 44' 20" S  41° 16' 48" W  View metadata report for BODC series reference number 2293750
22939341998-01-27 03:58 54° 23' 24" S  35° 32' 23" W  View metadata report for BODC series reference number 2293934
22940341998-02-02 04:23 53° 23' 24" S  38° 23' 59" W  View metadata report for BODC series reference number 2294034
22938291998-01-21 02:27 52° 44' 45" S  39° 38' 42" W  View metadata report for BODC series reference number 2293829
22939101998-01-26 05:08 54° 2' 23" S  35° 13' 47" W  View metadata report for BODC series reference number 2293910
22939461998-01-27 22:16:30 54° 32' 23" S  35° 23' 24" W  View metadata report for BODC series reference number 2293946
22940091998-01-31 22:26:30 53° 25' 47" S  38° 42' 0" W  View metadata report for BODC series reference number 2294009
22940221998-02-01 22:26:30 53° 45' 0" S  38° 16' 48" W  View metadata report for BODC series reference number 2294022
22937981998-01-20 11:11 51° 54' 18" S  40° 23' 5" W  View metadata report for BODC series reference number 2293798
22938171998-01-20 21:12 52° 27' 50" S  39° 53' 42" W  View metadata report for BODC series reference number 2293817
22938301998-01-21 08:16:30 53° 2' 27" S  39° 24' 28" W  View metadata report for BODC series reference number 2293830
22938781998-01-24 23:21:30 53° 51' 35" S  35° 23' 59" W  View metadata report for BODC series reference number 2293878
22939831998-01-30 22:17 53° 49' 12" S  38° 52' 48" W  View metadata report for BODC series reference number 2293983
22936941998-01-18 10:15 49° 2' 16" S  42° 34' 37" W  View metadata report for BODC series reference number 2293694
22937131998-01-18 18:53:30 49° 36' 46" S  42° 10' 44" W  View metadata report for BODC series reference number 2293713
22937251998-01-18 23:11:30 49° 54' 3" S  41° 57' 28" W  View metadata report for BODC series reference number 2293725
22938421998-01-21 13:25:30 53° 19' 8" S  39° 9' 25" W  View metadata report for BODC series reference number 2293842
22936691998-01-17 16:27:30 48° 10' 40" S  43° 8' 31" W  View metadata report for BODC series reference number 2293669
22937621998-01-19 19:17:30 51° 2' 16" S  41° 2' 9" W  View metadata report for BODC series reference number 2293762
22937741998-01-20 00:25 51° 18' 10" S  40° 49' 12" W  View metadata report for BODC series reference number 2293774
22938541998-01-21 18:46 53° 36' 17" S  38° 54' 3" W  View metadata report for BODC series reference number 2293854
22940461998-02-02 22:04 53° 21' 35" S  38° 4' 47" W  View metadata report for BODC series reference number 2294046
1  Multiple instrument types
Reference numbers
Horizontal spatial co-ordinates
Date and time
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Ammonium and ammonia concentration parameters in water bodies
Nitrate concentration parameters in the water column
Reference numbers
Horizontal spatial co-ordinates
Date and time
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Ammonium and ammonia concentration parameters in water bodies
Nitrate concentration parameters in the water column

BODC idDate/TimeLocationDoc.
22114621998-02-01 22:01  — 1998-02-02 07:17 53° 45' 2" S  38° 28' 25" W — 53° 16' 50" S  38° 16' 41" W  View metadata report for BODC series reference number 2211462
Discrete samples 
39  CTD frame plus rosette sampler