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RRS James Clark Ross JR19960422 (AMT2, JR13)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR19960422 (AMT2, JR13)
Cruise period1996-04-22 — 1996-05-22
StatusCompleted
Port of departureStanley, Falkland Islands (Malvinas)
Port of returnPlymouth, United Kingdom
ObjectivesThis cruise formed the second of a series of Atlantic transects, initially over 3 years, to acquire data for the calibration of remotely sensed observations and the validation of remote sensing products, leading to improved and more accuate interpretation of remote sensing observations. One of the primary objectives of the AMT programme is further understanding the interaction between physical processes and biological production. This will be essential of advanced models. Testing hypotheses on the partitioning of the ocean into biogeochemical provinces, and defining these regions, is central to overall objectives of the AMT programme.

Aims:
1. To improve our understanding of the relationship between physical processes and biological production
2. Identify, define and quantify latitudinal changes in biogeochemical provinces.
3. Determine phytoplankton characteristics and photosynthetic parameters
4. Identify nutrient regimes and their role in biogeochemical cycles
5. Characterise plankton community structure, including the accurate determination of carbon values
6. Relate the partial pressure of CO2 (pCO2) in surface waters with the biological production
7. Acquire data for the calibration of remotely sensed observations (primary validation)
8. Secondary validation of remotely sensed products
9. Interpret basin-scale remote sensing observations
10. Develop models that enable the interpretation of satellite imagery in terms of total water column properties
Chief scientistDavid Robins (Plymouth Marine Laboratory)
ProjectAMT
Cruise reportRRS James Clark Ross JR19960422 (AMT2, JR13) cruise report jr_amt2.pdf (5.03 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
South Atlantic Ocean
Track chartsRRS James Clark Ross JR19960422 (AMT2, JR13) cruise track — jr_amt2track.pdf (0.15 MB) 
Measurements 
Physical oceanography 
BathythermographDescription: XBT's were deployed. No. deployed not noted.
Water bottle stationsQuantity: number of samples = 1
Description: Underway sampling commenced and the CTD rosette system.
CTD stationsQuantity: number of samples = 1
Description: Underway sampling commenced and the CTD rosette system.
Biology and fisheries 
Primary productivityDescription: Coccolithophore bloom samples were taken for optical measurements. No. of samples not noted.
ZooplanktonQuantity: number of track lines = 2
Description: AMT-1 and AMT-2 took place.
Gear researchQuantity: number of deployments = 1
Description: In Stanley Sound the optics rig and instrumentation were deployed and tested.
Data held at BODC Get data
Discrete samples 
50  CTD frame plus rosette samplerBacteria taxonomic abundance in water bodies
Particulate total and organic carbon concentrations in the water column
Particulate total and organic nitrogen concentrations in the water column
Density of the water column
Bacteria generic abundance in water bodies
Metadata parameters
Bacterial production in the water column
Chlorophyll pigment concentrations in water bodies
Primary production in the water column
Silicate concentration parameters in the water column
Salinity of the water column
Temperature of the water column
Carotenoid and flavenoid pigment concentrations in water bodies
Nitrate concentration parameters in the water column
Reference numbers
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Phaeopigment concentrations in the water column
175  Expendable BathythermographTemperature of the water column
19  Profiling radiometerVisible waveband radiance and irradiance measurements in the water column
Temperature of the water column
329  Sample taken from ship's non-toxic supplyBacteria taxonomic abundance in water bodies
Bacteria generic abundance in water bodies
Chlorophyll pigment concentrations in water bodies
Silicate concentration parameters in the water column
Carotenoid and flavenoid pigment concentrations in water bodies
Nitrate concentration parameters in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Phaeopigment concentrations in the water column
78  WP-2 zooplankton net
50  Wetlabs 9 channel transmissometer