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RRS James Clark Ross JR17007

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR17007
Cruise period2018-07-10 — 2018-08-05
StatusCompleted
Port of departureTromsø, Norway
Port of returnSouthampton, United Kingdom
PurposeResearch
ObjectivesRates of warming in the high northern latitudes are amongst the highest globally. One of the most obvious manifestations is the dramatic reduction in summer sea ice extent and thickness over the past few decades. JR17007 is the second in a series of three cruises to the Barents Sea supporting the diet of scientific research within the Changing Arctic Ocean research programme, funded by NERC. The primary objective of the cruise was to collect a suite of pelagic and benthic samples across the 30˚ longitude water mass and sea-ice gradient occupied by the first cruise, JR16006, in 2017. The report includes a description of the sampling and data collection across 6 benthic focus sites, a series of water mass stations, continuous atmospheric methane sampling whilst underway, experimental observations and sampling of sea ice at and beyond the ice edge achieved during July-August, 2018. These were occupied as part of ongoing effort aimed at understanding the effect of changing sea ice cover on organic matter quality, benthic biodiversity, biological transformations of carbon and nutrient pools, and resulting ecosystem functioning at the Arctic Ocean seafloor.
Chief scientistMartin Solan (University of Southampton School of Ocean and Earth Science)
ProjectThe Changing Arctic Ocean Seafloor (ChAOS)
Cruise reportRRS James Clark Ross JR17007 cruise report jr17007.pdf (29.43 MB) 
Ocean/sea areas 
GeneralBarents Sea
Track chartsRRS James Clark Ross JR17007 cruise track — jr17007trk.pdf (0.32 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 26
Description: Continuous measurements of navigation, meteorology and surface hydrography parameters
CTD stationsQuantity: number of stations = 20
Description: CTD profiles measuring: pressure, temperature, conductivity, salinity, dissolved oxygen, PAR, fluorometry, beam attenuation
Current profiler (eg ADCP)Quantity: number of stations = 20
Description: LADCP profiles (two instruments set to measure downwards)
Chemical oceanography 
OxygenQuantity: number of stations = 15
Description: Oxygen concentration from seawater samples for CTD calibration purposes
Other dissolved gasesQuantity: activity duration in days = 26
Description: Continuous water measurements for CH4
Other dissolved gasesQuantity: number of stations = 6
Description: CTD water samples for methane and N2O concentrations at specific PAR depths
Other dissolved gasesQuantity: number of samples = 293
Description: Discrete measurements of water CH4 concentration, and CH4 isotopic composition
PhosphateQuantity: number of stations = 9
Description: CTD water samples for Primary Production, bacterial production, Phosphate uptake, extra-celular enzime activity, phytoplankton samples for community composition and molecular samples for bacterial and phytoplankton community composition, flow cytometry
PhosphateQuantity: number of stations = 23
Description: Nutrients, Nitrate isotopes from saples collected from seawater, sediment pore waters and sea ice
PhosphateQuantity: number of cores = 47
Description: Sediment cohesion and erodibility, sediment properties (porosity and organic carbon content), sediment pigments, suspended particulate matter, pore water and overlying core bottom water bioirrigation, advective pressure, optical backscatter and core bottom water nutrients
NitrateQuantity: number of cores = 47
Description: Sediment cohesion and erodibility, sediment properties (porosity and organic carbon content), sediment pigments, suspended particulate matter, pore water and overlying core bottom water bioirrigation, advective pressure, optical backscatter and core bottom water nutrients
NitrateQuantity: number of stations = 23
Description: Nutrients, Nitrate isotopes from saples collected from seawater, sediment pore waters and sea ice
NitriteQuantity: number of stations = 23
Description: Nutrients, Nitrate isotopes from saples collected from seawater, sediment pore waters and sea ice
NitriteQuantity: number of cores = 47
Description: Sediment cohesion and erodibility, sediment properties (porosity and organic carbon content), sediment pigments, suspended particulate matter, pore water and overlying core bottom water bioirrigation, advective pressure, optical backscatter and core bottom water nutrients
AmmoniaQuantity: number of cores = 47
Description: Sediment cohesion and erodibility, sediment properties (porosity and organic carbon content), sediment pigments, suspended particulate matter, pore water and overlying core bottom water bioirrigation, advective pressure, optical backscatter and core bottom water nutrients
AmmoniaQuantity: number of stations = 23
Description: Nutrients, Nitrate isotopes from saples collected from seawater, sediment pore waters and sea ice
SilicateQuantity: number of cores = 47
Description: Sediment cohesion and erodibility, sediment properties (porosity and organic carbon content), sediment pigments, suspended particulate matter, pore water and overlying core bottom water bioirrigation, advective pressure, optical backscatter and core bottom water nutrients
SilicateQuantity: number of stations = 23
Description: Nutrients, Nitrate isotopes from saples collected from seawater, sediment pore waters and sea ice
IsotopesQuantity: number of samples = 293
Description: Discrete measurements of water CH4 concentration, and CH4 isotopic composition
IsotopesQuantity: number of samples = 28
Description: Non-toxic underway samples for nifH-gene and POM
IsotopesQuantity: number of stations = 23
Description: d18O, dBa and dSi determination from seawater, sediment pore waters and sea ice
IsotopesQuantity: number of stations = 7
Description: CTD surface water samples for POM and 13C-DIC determination
Other chemical oceanographic measurementsQuantity: number of samples = 28
Description: Non-toxic underway samples for nifH-gene and POM
Other chemical oceanographic measurementsQuantity: number of stations = 7
Description: Water samples for radiocarbon measurements
Other chemical oceanographic measurementsQuantity: number of cores = 22
Description: Benthic community function, nitrogen cycling, nitrification, denitrification
Contamination 
Other contaminant measurementsQuantity: number of track lines = 10
Description: Microplastics in surface waters
Other contaminant measurementsQuantity: number of cores = 18
Description: Microplastics in sediment samples
Biology and fisheries 
Primary productivityQuantity: number of stations = 9
Description: CTD water samples for Primary Production, bacterial production, Phosphate uptake, extra-celular enzime activity, phytoplankton samples for community composition and molecular samples for bacterial and phytoplankton community composition, flow cytometry
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 12
Description: Water samples for pigments, DOC, lipids
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of cores = 24
Description: Surface sediment pigments from megacorer samples
Dissolved organic matter (inc DOC)Quantity: number of stations = 12
Description: Water samples for pigments, DOC, lipids
Biochemical measurements (eg lipids, amino acids)Quantity: number of stations = 12
Description: Water samples for pigments, DOC, lipids
PhytoplanktonQuantity: number of stations = 9
Description: CTD water samples for Primary Production, bacterial production, Phosphate uptake, extra-celular enzime activity, phytoplankton samples for community composition and molecular samples for bacterial and phytoplankton community composition, flow cytometry
ZoobenthosQuantity: number of hauls = 24
Description: Biological blue carbon in marine invertebrates
ZoobenthosQuantity: number of hauls = 3
Description: Species ID, biomass an abundance
ZoobenthosQuantity: number of cores = 77
Description: Meio, macrofauna and megafauna species ID, abundance and biomass, particle size analysis
Other biological/fisheries measurementQuantity: number of cores = 47
Description: Sediment cohesion and erodibility, sediment properties (porosity and organic carbon content), sediment pigments, suspended particulate matter, pore water and overlying core bottom water bioirrigation, advective pressure, optical backscatter and core bottom water nutrients
Other biological/fisheries measurementQuantity: number of stations = 9
Description: CTD water samples for Primary Production, bacterial production, Phosphate uptake, extra-celular enzime activity, phytoplankton samples for community composition and molecular samples for bacterial and phytoplankton community composition, flow cytometry
Other biological/fisheries measurementQuantity: number of stations = 4
Description: Water samples for lipid biomarker
Other biological/fisheries measurementQuantity: number of cores = 24
Description: DNA from sediment samples
Other biological/fisheries measurementQuantity: number of hauls = 30
Description: Reproduction samples
Other biological/fisheries measurementQuantity: number of cores = 39
Description: Bioturbation incubation experiments, climate experiments
Other biological/fisheries measurementQuantity: number of stations = 6
Description: Benthic marine invertebrates for radiocarbon dating
Other biological/fisheries measurementQuantity: number of cores = 7
Description: Samples collected from box corer deployments for biological measurements
Meteorology 
Routine standard measurementsQuantity: activity duration in days = 26
Description: Continuous measurements of navigation, meteorology and surface hydrography parameters
Atmospheric chemistryQuantity: number of samples = 55
Description: Discrete measurements of atmospheric CH4 concentration, and CH4 isotopic composition
Geology and geophysics 
Other geological/geophysical measurementsQuantity: number of stations = 7
Description: Acoustic doppler velocimeter measurements from sediment cores
Other geological/geophysical measurementsQuantity: number of cores = 24
Description: ICP analysis of pore waters for major trace elements, XRF on sediments, rare earth elements determination on pore waters
Other geological/geophysical measurementsQuantity: number of cores = 24
Description: Sediment samples for organic geochemistry,
Other geological/geophysical measurementsQuantity: number of cores = 47
Description: Sediment cohesion and erodibility, sediment properties (porosity and organic carbon content), sediment pigments, suspended particulate matter, pore water and overlying core bottom water bioirrigation, advective pressure, optical backscatter and core bottom water nutrients
Data held at BODC Get data
Discrete samples 
192  Box core
20  CTD frame plus rosette sampler
54  Epibenthic Sledge
4  Ice/Snow observations and samples from personnel deployment
24  Multicorer
46  Sample taken from ship's non-toxic supply
5  Unspecified zooplankton net or nets