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RRS James Clark Ross JR18007

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR18007
Cruise period2019-08-04 — 2019-09-06
StatusCompleted
Port of departureAberdeen, United Kingdom
Port of returnAberdeen, United Kingdom
PurposeResearch
ObjectivesResearch summary for DIAPOD NERC Changing Arctic Ocean programme: Copepod species of the genus Calanus (Calanus hereafter) are rice grain size crustaceans that occur throughout the Arctic Ocean consuming enormous quantities of phytoplankton. These tiny animals represent the primary food source for many Arctic fish, seabirds and whales. During early spring, they gorge on extensive seasonal blooms of diatoms, fat-rich phytoplankton that proliferates both beneath the sea ice and in the open ocean. This allows Calanus to rapidly obtain sufficient fate to survive during the many months of food scarcity during the Arctic winter. Diatoms also produce on the main marine omega-3 polyunsaturated fatty acids that Calanus require to successfully survive and reproduce in the frozen Arctic waters. Calanus seasonally migrate into deep waters to save energy and reduce their losses to predation in an overwintering process called diapause that is fuelled entirely by carbon rich fat (lipids). This vertical lipid pump transfers vast quantities of carbon in the oceans interior and ultimate presents the drawdown of atmospheric carbon dioxide. Continued global warming throughout the 21st century is expected to exert a strong influence on the timing, magnitude and spatial distribution of diatom productivity in the Arctic Ocean. Little is known about how Calanus will respond to these changes, making it difficult to understand how the wider Arctic ecosystem and its biogeochemistry will be affected by climate change. The overarching goal of this project is to develop a predictive understanding of how Calanus in the Arctic will be affected by future climate change. At each station, a series of activities will provide samples to address the objectives of DIAPOD. Specifically, a series of nets (including Bongo opening-closing, Hydrobios and ring nets) will be deployed to different depth horizons to study the depth distribution of Calanus and collect specimens.
Chief scientistDavid Pond (University of Stirling, Institute of Aquaculture)
ProjectChanging Arctic Ocean (CAO)
Ocean/sea areas 
GeneralGreenland Sea
SpecificFram Strait
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 34
Description: Navigation, bathymetry, meteorological and surface hydrography continuous measurements
CTD stationsQuantity: number of stations = 48
Description: 48 CTD casts: pressure, temperaturem salinitym conductivity, PAR, fluorometry, beam transmission, beam attenuation
Chemical oceanography 
Other dissolved gasesQuantity: number of stations = 6
Description: CTD water samples for CO, DMS, CDOM, DNA, pigments
Other dissolved gasesQuantity: number of stations = 6
Description: CTD water samples for DMS and molecular DNA
NitrateQuantity: number of stations = 15
Description: CTD water samples for macronutrient determination
NitrateQuantity: number of stations = 6
Description: CTD water samples for primary productivity, bacterial productivity, extracellular enzyma activity, and nutrients
NitriteQuantity: number of stations = 6
Description: CTD water samples for primary productivity, bacterial productivity, extracellular enzyma activity, and nutrients
NitriteQuantity: number of stations = 15
Description: CTD water samples for macronutrient determination
AmmoniaQuantity: number of stations = 6
Description: CTD water samples for primary productivity, bacterial productivity, extracellular enzyma activity, and nutrients
AmmoniaQuantity: number of stations = 15
Description: CTD water samples for macronutrient determination
SilicateQuantity: number of stations = 15
Description: CTD water samples for macronutrient determination
SilicateQuantity: number of stations = 6
Description: CTD water samples for primary productivity, bacterial productivity, extracellular enzyma activity, and nutrients
AlkalinityQuantity: number of stations = 6
Description: CTD water samples for Alkalinity, carbonate system, DNA, pigments, DOC determination, trace gases
IsotopesQuantity: number of stations = 9
Description: CTD water samples for stable isotope analysis
Other chemical oceanographic measurementsQuantity: number of stations = 6
Description: CTD water samples for Alkalinity, carbonate system, DNA, pigments, DOC determination, trace gases
Contamination 
Contaminants in organismsQuantity: number of stations = 6
Description: CTD water samples for zooplankton community compositon and microplastics
Biology and fisheries 
Primary productivityQuantity: number of stations = 6
Description: CTD water samples for primary productivity, bacterial productivity, extracellular enzyma activity, and nutrients
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 6
Description: CTD water samples for Alkalinity, carbonate system, DNA, pigments, DOC determination, trace gases
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 6
Description: CTD water samples for CO, DMS, CDOM, DNA, pigments
Particulate organic matter (inc POC, PON)Quantity: number of stations = 6
Description: CTD water samples for Alkalinity, carbonate system, DNA, pigments, DOC determination, trace gases
Dissolved organic matter (inc DOC)Quantity: number of stations = 6
Description: CTD water samples for CO, DMS, CDOM, DNA, pigments
Biochemical measurements (eg lipids, amino acids)Quantity: number of hauls = 20
Description: Net hauls for metabolomics
Biochemical measurements (eg lipids, amino acids)Quantity: number of stations = 13
Description: CTD water samples for Biogenic gels and microbial community
Biochemical measurements (eg lipids, amino acids)Quantity: number of stations = 18
Description: CTD water samples for fatty acids, pigments and lugols
ZooplanktonQuantity: number of hauls = 8
Description: Net hauls for zooplankton experiments
ZooplanktonQuantity: number of hauls = 8
Description: Net hauls for zooplankton
ZooplanktonQuantity: number of stations = 6
Description: CTD water samples for zooplankton community compositon and microplastics
ZooplanktonQuantity: number of hauls = 11
Description: Net hauls for biomass dominance of calanus species through different depth stratta, lipid sac volumes
ZooplanktonQuantity: number of hauls = 29
Description: Net hauls for zooplankton and grazing data, species composition
ZooplanktonQuantity: number of hauls = 21
Description: Net hauls for circadian rythm experiments
ZooplanktonQuantity: number of stations = 5
Description: CTD water samples for TLC (Tauring lipids)
ZooplanktonQuantity: number of hauls = 5
Description: Net hauls for copepod grazing incubations
SestonQuantity: number of stations = 21
Description: CTD water samples for copepod grazing incubations
SestonQuantity: number of stations = 18
Description: CTD water samples for fatty acids, pigments and lugols
NeustonQuantity: number of stations = 16
Description: CTD water samples for chlorophyll determination at 2 depths in the water column (chl maximum and surface)
Eggs and larvaeQuantity: number of hauls = 21
Description: Net hauls for egg production determination
Pelagic bacteria/micro-organismsQuantity: number of stations = 13
Description: CTD water samples for Biogenic gels and microbial community
Pelagic bacteria/micro-organismsQuantity: number of stations = 6
Description: CTD water samples for primary productivity, bacterial productivity, extracellular enzyma activity, and nutrients
Other biological/fisheries measurementQuantity: number of stations = 6
Description: CTD water samples for CO, DMS, CDOM, DNA, pigments
Other biological/fisheries measurementQuantity: number of stations = 6
Description: CTD water samples for primary productivity, bacterial productivity, extracellular enzyma activity, and nutrients
Other biological/fisheries measurementQuantity: number of stations = 6
Description: CTD water samples for DMS and molecular DNA
Other biological/fisheries measurementQuantity: number of stations = 6
Description: CTD water samples for Alkalinity, carbonate system, DNA, pigments, DOC determination, trace gases
Meteorology 
Other meteorological measurementsQuantity: activity duration in days = 34
Description: Navigation, bathymetry, meteorological and surface hydrography continuous measurements
Data held at BODC Get data
Discrete samples 
48  CTD frame plus rosette sampler
72  Sample taken from ship's non-toxic supply