Cruise inventory

RRS James Clark Ross JR19980514 (AMT6, JR32)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR19980514 (AMT6, JR32)
Cruise period1998-05-14 — 1998-06-16
StatusCompleted
Port of departureCape Town, South Africa
Port of returnGrimsby, United Kingdom
ObjectivesThe Atlantic Meridional Transect (AMT) programme exploits the passage of the Royal Research Ship (RRS) James Clark Ross (JCR) latitudinally through the Atlantic Ocean between the United Kingdom and the Falkland Islands (approximately 52° N to 52° S) in support of British Antarctic Survey (BAS) research activities in the Antarctic and its environs. In September, the JCR sails southward, sampling the boreal fall and the austral springconditions in the northern hemisphere. The ship's track crosses a range of ecosystems and physicochemical regimes, within which conditions vary from sub-polar to tropical and from eutrophic shelf seas and upwelling systems to oligotrophic and mid-ocean gyres. The JCR provides the ideal platform to measure physical, biological and bio-optical properties and processes through these diverse ecosystems of the North and South Atlantic Oceans.

The AMT programme goals are:
1. To test and refine hypotheses on the responses of oceanic ecosystems and the coupled marine atmosphere to anthropogenically forced environmental change.
2. To develop a holistic research strategy, integrating shipboard measurements, remote sensing and modelling.
3. To provide calibration and validation of new satellite sensors of ocean colour, sea surface temperature, sea surface height and solar radiation.
4. To improve our knowledge of marine biogeochemical processes, ecosystem dynamics, food-webs and fisheries and characterize biogeochemical provinces.
5. To develop coupled physical-biological models of production and ecosystem dynamics.
6. To quantify ocean responses to changes in abundance of radiatively and chemically-active trace gases.

The normal strategy for AMT cruises is set by the requirement for the JCR to make passage between the UK and the FI within the allocated time of 25 d plus 6 d added for scientific research. The geographical range of 50° N, 1° W to 52° S, 58° W, amounts to approximately 7500 miles (13800 km), requiring an average distance of 240 miles per day, or 4° of latitude while on a N-S course (as on the 20° W line). For AMT-6, with a focus on a high productivity, upwelling ecosystems and with 6 d extra for science spread of greatest interest (e.g. the Benguela). Thus the plan was to proceed northwards through the Benguela at only ca 150 miles per day, with more than one station as necessary and make a faster passage through the oligotrophic regions.
Chief scientistJames Aiken (Plymouth Marine Laboratory)
ProjectAMT
Cruise reportRRS James Clark Ross JR19980514 (AMT6, JR32) cruise report jr_amt6.pdf — access key 'C' (6.36 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
South Atlantic Ocean
Track chartsRRS James Clark Ross JR19980514 (AMT6, JR32) cruise track — jr_amt6track.pdf (00 MB) 
Measurements 
Physical oceanography 
Water bottle stationsDescription: Water bottle samples were collected using the rosette system. No. of samples not noted.
CTD stationsDescription: CTD station samples were collected. No. of samples not noted.
Optics (eg underwater light levels)Description: Optical measurements were taken with SeaOPS, SeaFALLS, LoCNESS and miniNESS. No. of measurements not noted.
Biology and fisheries 
Primary productivityDescription: Data on phytoplankton pigments and species, primary productivity and zooplankton was gathered. No. of samples not noted.
PhytoplanktonDescription: Data on phytoplankton pigments and species, primary productivity and zooplankton was gathered. No. of samples not noted.
ZooplanktonDescription: Data on phytoplankton pigments and species, primary productivity and zooplankton was gathered. No. of samples not noted.
Data held at BODC 
Series/Profiles 
38  Bottle station
Quality control flags
Ammonium and ammonia concentration parameters in water bodies
Silicate concentration parameters in the water column
Vertical spatial coordinates
Nitrate concentration parameters in the water column
Reference numbers
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Quality control flags
Ammonium and ammonia concentration parameters in water bodies
Silicate concentration parameters in the water column
Vertical spatial coordinates
Nitrate concentration parameters in the water column
Reference numbers
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column

BODC idDate/TimeLocationDoc.
10944401998-06-07 09:21 24° 30' 20" N  20° 0' 1" W  View metadata report for BODC series reference number 1094440
10944521998-06-09 08:20 32° 25' 41" N  17° 2' 55" W  View metadata report for BODC series reference number 1094452
10944641998-05-25 08:55 17° 39' 32" S  11° 19' 50" E  View metadata report for BODC series reference number 1094464
10944761998-05-31 08:33 0° 1' 42" S  8° 51' 29" W  View metadata report for BODC series reference number 1094476
10944881998-06-04 10:08 12° 47' 31" N  19° 14' 39" W  View metadata report for BODC series reference number 1094488
10945071998-05-21 08:24 28° 55' 44" S  16° 11' 14" E  View metadata report for BODC series reference number 1094507
10945191998-06-03 09:59 9° 3' 48" N  19° 7' 15" W  View metadata report for BODC series reference number 1094519
10945201998-06-10 10:02 36° 36' 50" N  17° 30' 18" W  View metadata report for BODC series reference number 1094520
10945321998-06-11 09:22 41° 4' 48" N  17° 25' 53" W  View metadata report for BODC series reference number 1094532
10945441998-06-12 09:06 44° 40' 40" N  14° 0' 35" W  View metadata report for BODC series reference number 1094544
10945561998-06-13 10:09 48° 26' 55" N  9° 41' 51" W  View metadata report for BODC series reference number 1094556
10945681998-06-14 09:20 49° 50' 18" N  4° 9' 11" W  View metadata report for BODC series reference number 1094568
10945811998-06-03 09:22 9° 3' 47" N  19° 7' 15" W  View metadata report for BODC series reference number 1094581
10945931998-06-05 10:08 16° 22' 39" N  20° 0' 17" W  View metadata report for BODC series reference number 1094593
10946001998-06-10 09:21 36° 36' 50" N  17° 30' 17" W  View metadata report for BODC series reference number 1094600
10946121998-05-24 08:38 18° 59' 45" S  11° 59' 58" E  View metadata report for BODC series reference number 1094612
10946241998-05-29 09:34 5° 51' 47" S  2° 37' 45" W  View metadata report for BODC series reference number 1094624
10946361998-06-05 09:30 16° 22' 41" N  20° 0' 15" W  View metadata report for BODC series reference number 1094636
10946481998-05-26 08:55 14° 44' 35" S  7° 51' 38" E  View metadata report for BODC series reference number 1094648
10946611998-05-28 08:49 8° 37' 33" S  0° 36' 19" E  View metadata report for BODC series reference number 1094661
10946731998-05-30 09:29 2° 48' 38" S  6° 10' 10" W  View metadata report for BODC series reference number 1094673
10946851998-06-02 09:26 5° 51' 44" N  16° 4' 53" W  View metadata report for BODC series reference number 1094685
10946971998-06-04 09:23 12° 47' 21" N  19° 14' 38" W  View metadata report for BODC series reference number 1094697
10947041998-06-08 09:21 28° 41' 3" N  19° 52' 14" W  View metadata report for BODC series reference number 1094704
10947161998-05-15 14:06 33° 37' 26" S  18° 0' 20" E  View metadata report for BODC series reference number 1094716
10947281998-05-17 08:26 29° 31' 20" S  16° 27' 9" E  View metadata report for BODC series reference number 1094728
10947411998-05-18 08:50 26° 41' 50" S  14° 14' 42" E  View metadata report for BODC series reference number 1094741
10947531998-05-22 08:22 24° 45' 0" S  14° 19' 25" E  View metadata report for BODC series reference number 1094753
10947651998-05-24 09:32 18° 59' 36" S  11° 59' 53" E  View metadata report for BODC series reference number 1094765
10947771998-05-27 08:51 11° 37' 15" S  4° 8' 21" E  View metadata report for BODC series reference number 1094777
10947891998-05-27 09:23 11° 37' 15" S  4° 8' 21" E  View metadata report for BODC series reference number 1094789
10947901998-05-28 09:29 8° 37' 21" S  0° 35' 53" E  View metadata report for BODC series reference number 1094790
10948081998-05-29 08:57 5° 51' 52" S  2° 37' 30" W  View metadata report for BODC series reference number 1094808
10948211998-05-30 08:50 2° 48' 39" S  6° 9' 57" W  View metadata report for BODC series reference number 1094821
10948331998-06-01 09:27 3° 4' 23" N  12° 46' 18" W  View metadata report for BODC series reference number 1094833
10948451998-06-01 10:02 3° 4' 27" N  12° 46' 19" W  View metadata report for BODC series reference number 1094845
10948571998-06-02 09:50 5° 51' 44" N  16° 4' 54" W  View metadata report for BODC series reference number 1094857
10948691998-06-06 09:29 20° 24' 19" N  20° 0' 8" W  View metadata report for BODC series reference number 1094869
51  CTD/STD cast
Density of the water column
Transmittance and attenuance of the water column
Visible waveband radiance and irradiance measurements in the water column
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Raw fluorometer output
Salinity of the water column
Temperature of the water column
Density of the water column
Transmittance and attenuance of the water column
Visible waveband radiance and irradiance measurements in the water column
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Raw fluorometer output
Salinity of the water column
Temperature of the water column

BODC idDate/TimeLocationDoc.
10595101998-06-11 09:07 41° 4' 47" N  17° 25' 54" W  View metadata report for BODC series reference number 1059510
10595221998-06-12 08:38 44° 40' 40" N  14° 0' 35" W  View metadata report for BODC series reference number 1059522
10595341998-06-13 09:55 48° 26' 55" N  9° 41' 51" W  View metadata report for BODC series reference number 1059534
10595461998-06-14 09:07 49° 50' 19" N  4° 9' 11" W  View metadata report for BODC series reference number 1059546
10595581998-05-31 08:19 0° 1' 42" S  8° 51' 29" W  View metadata report for BODC series reference number 1059558
10595711998-06-03 09:13 9° 3' 47" N  19° 7' 15" W  View metadata report for BODC series reference number 1059571
10595831998-06-05 09:55 16° 22' 40" N  20° 0' 17" W  View metadata report for BODC series reference number 1059583
10595951998-06-10 09:08 36° 36' 51" N  17° 30' 17" W  View metadata report for BODC series reference number 1059595
10596021998-05-15 13:51 33° 37' 26" S  18° 0' 20" E  View metadata report for BODC series reference number 1059602
10596141998-05-16 08:18 32° 20' 22" S  17° 52' 35" E  View metadata report for BODC series reference number 1059614
10596261998-05-16 11:17 32° 3' 28" S  17° 51' 58" E  View metadata report for BODC series reference number 1059626
10596381998-05-17 08:15 29° 31' 20" S  16° 27' 9" E  View metadata report for BODC series reference number 1059638
10596511998-05-17 11:18 29° 21' 51" S  16° 15' 1" E  View metadata report for BODC series reference number 1059651
10596631998-05-18 04:24 26° 42' 32" S  14° 47' 54" E  View metadata report for BODC series reference number 1059663
10596751998-05-18 08:40 26° 41' 51" S  14° 14' 42" E  View metadata report for BODC series reference number 1059675
10596871998-05-18 11:32 26° 42' 33" S  13° 57' 18" E  View metadata report for BODC series reference number 1059687
10596991998-05-18 15:01 26° 41' 39" S  13° 29' 50" E  View metadata report for BODC series reference number 1059699
10597061998-05-21 08:10 28° 55' 44" S  16° 11' 14" E  View metadata report for BODC series reference number 1059706
10597181998-05-21 11:50 28° 32' 36" S  15° 48' 6" E  View metadata report for BODC series reference number 1059718
10597311998-05-22 08:12 24° 45' 0" S  14° 19' 25" E  View metadata report for BODC series reference number 1059731
10597431998-05-22 12:11 24° 16' 31" S  14° 6' 18" E  View metadata report for BODC series reference number 1059743
10597551998-05-23 04:16 22° 5' 33" S  12° 36' 33" E  View metadata report for BODC series reference number 1059755
10597671998-05-23 10:21 21° 39' 8" S  12° 24' 15" E  View metadata report for BODC series reference number 1059767
10597791998-05-23 13:39 21° 23' 53" S  12° 6' 4" E  View metadata report for BODC series reference number 1059779
10597801998-05-24 08:26 18° 59' 45" S  11° 59' 58" E  View metadata report for BODC series reference number 1059780
10597921998-05-24 09:20 18° 59' 35" S  11° 59' 53" E  View metadata report for BODC series reference number 1059792
10598111998-05-24 11:54 18° 54' 29" S  12° 9' 4" E  View metadata report for BODC series reference number 1059811
10598231998-05-25 11:43 17° 26' 21" S  11° 4' 20" E  View metadata report for BODC series reference number 1059823
10598351998-05-26 08:41 14° 44' 35" S  7° 51' 38" E  View metadata report for BODC series reference number 1059835
10598471998-05-27 08:37 11° 37' 15" S  4° 8' 21" E  View metadata report for BODC series reference number 1059847
10598591998-05-27 09:09 11° 37' 15" S  4° 8' 21" E  View metadata report for BODC series reference number 1059859
10598601998-05-28 08:36 8° 37' 32" S  0° 36' 19" E  View metadata report for BODC series reference number 1059860
10598721998-05-28 09:15 8° 37' 21" S  0° 35' 53" E  View metadata report for BODC series reference number 1059872
10598841998-05-29 08:46 5° 51' 52" S  2° 37' 30" W  View metadata report for BODC series reference number 1059884
10598961998-05-29 09:20 5° 51' 47" S  2° 37' 45" W  View metadata report for BODC series reference number 1059896
10599031998-05-30 08:36 2° 48' 40" S  6° 9' 57" W  View metadata report for BODC series reference number 1059903
10599151998-05-30 09:16 2° 48' 37" S  6° 10' 10" W  View metadata report for BODC series reference number 1059915
10599271998-06-01 09:13 3° 4' 23" N  12° 46' 18" W  View metadata report for BODC series reference number 1059927
10599391998-06-01 09:48 3° 4' 27" N  12° 46' 19" W  View metadata report for BODC series reference number 1059939
10599401998-06-02 09:12 5° 51' 44" N  16° 4' 54" W  View metadata report for BODC series reference number 1059940
10599521998-06-02 09:36 5° 51' 44" N  16° 4' 54" W  View metadata report for BODC series reference number 1059952
10599641998-06-03 09:45 9° 3' 47" N  19° 7' 15" W  View metadata report for BODC series reference number 1059964
10599761998-06-04 09:09 12° 47' 21" N  19° 14' 38" W  View metadata report for BODC series reference number 1059976
10599881998-06-04 09:54 12° 47' 31" N  19° 14' 39" W  View metadata report for BODC series reference number 1059988
10600011998-06-05 09:17 16° 22' 41" N  20° 0' 15" W  View metadata report for BODC series reference number 1060001
10600131998-06-06 09:16 20° 24' 19" N  20° 0' 9" W  View metadata report for BODC series reference number 1060013
10600251998-06-07 09:08 24° 30' 20" N  20° 0' 1" W  View metadata report for BODC series reference number 1060025
10600371998-06-08 09:07 28° 41' 3" N  19° 52' 14" W  View metadata report for BODC series reference number 1060037
10600491998-06-09 08:08 32° 25' 41" N  17° 2' 55" W  View metadata report for BODC series reference number 1060049
10600501998-05-31 09:06 0° 1' 19" S  8° 51' 48" W  View metadata report for BODC series reference number 1060050
10600621998-06-10 09:48 36° 36' 50" N  17° 30' 17" W  View metadata report for BODC series reference number 1060062
1  Meteorological data logger
Solar Radiation
Wind strength and direction
Horizontal spatial co-ordinates
Date and time
Air temperature
Visible waveband radiance and irradiance measurements in the atmosphere
Solar Radiation
Wind strength and direction
Horizontal spatial co-ordinates
Date and time
Air temperature
Visible waveband radiance and irradiance measurements in the atmosphere

BODC idDate/TimeLocationDoc.
12229111998-05-15 12:00:30  — 1998-06-16 08:41 33° 37' 57" S  18° 0' 50" E — 53° 35' 11" N  0° 1' 42" E  View metadata report for BODC series reference number 1222911
1  Multiple instrument types
Raw fluorometer output
Salinity of the water column
Horizontal spatial co-ordinates
Temperature of the water column
Date and time
Raw fluorometer output
Salinity of the water column
Horizontal spatial co-ordinates
Temperature of the water column
Date and time

BODC idDate/TimeLocationDoc.
12229351998-05-15 12:00:30  — 1998-06-16 08:41 33° 37' 57" S  18° 0' 50" E — 53° 35' 11" N  0° 1' 42" E  View metadata report for BODC series reference number 1222935
1  Single-beam echosounder
Platform or instrument orientation
Horizontal platform movement
Bathymetry and Elevation
Horizontal spatial co-ordinates
Date and time
Platform or instrument orientation
Horizontal platform movement
Bathymetry and Elevation
Horizontal spatial co-ordinates
Date and time

BODC idDate/TimeLocationDoc.
12229231998-05-15 12:00:30  — 1998-06-16 08:41 33° 37' 57" S  18° 0' 50" E — 53° 35' 11" N  0° 1' 42" E  View metadata report for BODC series reference number 1222923
Discrete samples 
52  CTD frame plus rosette samplerAmmonium and ammonia concentration parameters in water bodies
Phytoplankton taxonomic biomass in water bodies
Dissolved metal concentrations in the water column
Particulate total and organic carbon concentrations in the water column
Oxygen production and respiration in the water column
Particulate total and organic nitrogen concentrations in the water column
Light absorption in the water column
Density of the water column
Transmittance and attenuance of the water column
Bacteria non taxonomy-related biomass expressed as carbon per unit volume of the water column
Bacteria generic abundance in water bodies
Visible waveband radiance and irradiance measurements in the water column
Primary production in the water column
Chlorophyll pigment concentrations in water bodies
Total metal concentrations in water bodies
Phytoplankton taxonomic abundance in water bodies
Metadata parameters
Silicate concentration parameters in the water column
Raw fluorometer output
Salinity of the water column
Plankton abundance per unit volume of the water column
Total dissolved inorganic carbon (TCO2) concentration in the water column
Carotenoid and flavenoid pigment concentrations in water bodies
Raw light meter output
Nitrate concentration parameters in the water column
Temperature of the water column
Plankton biomass expressed as carbon per unit volume of the water column
Dissolved oxygen parameters in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
77  Expendable BathythermographTemperature of the water column
324  Sample taken from ship's non-toxic supplyPhytoplankton taxonomic biomass in water bodies
Particulate total and organic carbon concentrations in the water column
Particulate total and organic nitrogen concentrations in the water column
Light absorption in the water column
Bacteria non taxonomy-related biomass expressed as carbon per unit volume of the water column
Bacteria generic abundance in water bodies
Chlorophyll pigment concentrations in water bodies
Phytoplankton taxonomic abundance in water bodies
Plankton abundance per unit volume of the water column
Carotenoid and flavenoid pigment concentrations in water bodies
Plankton biomass expressed as carbon per unit volume of the water column
7  Surface water sample collected by a bucket on a ropePhytoplankton taxonomic biomass in water bodies
Oxygen production and respiration in the water column
Bacteria non taxonomy-related biomass expressed as carbon per unit volume of the water column
Bacteria generic abundance in water bodies
Chlorophyll pigment concentrations in water bodies
Phytoplankton taxonomic abundance in water bodies
Plankton abundance per unit volume of the water column
Total dissolved inorganic carbon (TCO2) concentration in the water column
Carotenoid and flavenoid pigment concentrations in water bodies
Plankton biomass expressed as carbon per unit volume of the water column