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RRS James Clark Ross JR20040813 (JR106)
Cruise summary report
Cruise Info. | |||||||||||||||||||||||||||||||||||||||||||||
Ship name (ship code) | RRS James Clark Ross (74JC) | ||||||||||||||||||||||||||||||||||||||||||||
Cruise identifier | JR20040813 (JR106) | ||||||||||||||||||||||||||||||||||||||||||||
Cruise period | 2004-08-10 — 2004-08-30 | ||||||||||||||||||||||||||||||||||||||||||||
Status | Completed | ||||||||||||||||||||||||||||||||||||||||||||
Port of departure | Reykjavík, Iceland | ||||||||||||||||||||||||||||||||||||||||||||
Port of return | Ísafjörður, Iceland | ||||||||||||||||||||||||||||||||||||||||||||
Objectives | To obtain ice thickness distributions from the upward-looking swath sonar system aboard Autosub, to validate the thickness values against other data collected simultaneously from the surface and the air, and to conduct transects across and within Fram Strait so as to obtain estimates of ice flux. An important aspect of the cruise also was the development of operating methods which are suitable for ice-covered waters. | ||||||||||||||||||||||||||||||||||||||||||||
Chief scientist | Peter Wadhams (University of Cambridge Department of Applied Mathematics and Theoretical Physics) | ||||||||||||||||||||||||||||||||||||||||||||
Project | Autosub under Arctic Sea Ice | ||||||||||||||||||||||||||||||||||||||||||||
Coordinating body | NERC | ||||||||||||||||||||||||||||||||||||||||||||
Cruise report | (3.49 MB) | ||||||||||||||||||||||||||||||||||||||||||||
Ocean/sea areas | |||||||||||||||||||||||||||||||||||||||||||||
General | Greenland Sea Arctic Ocean | ||||||||||||||||||||||||||||||||||||||||||||
Specific | East Greenland- Fram strait and Belgica ban | ||||||||||||||||||||||||||||||||||||||||||||
Measurements | |||||||||||||||||||||||||||||||||||||||||||||
Physical oceanography | |||||||||||||||||||||||||||||||||||||||||||||
Bathythermograph | Quantity: number of stations = 8 Description: XBT stations | ||||||||||||||||||||||||||||||||||||||||||||
CTD stations | Quantity: number of dives = 11 Description: AUTOSUB Seabird 911 CTD system. | ||||||||||||||||||||||||||||||||||||||||||||
CTD stations | Quantity: number of stations = 20 Description: CTD casts, including pressure, oxygen, altimeter, OBS and transmissometer readings | ||||||||||||||||||||||||||||||||||||||||||||
Current profiler (eg ADCP) | Quantity: number of dives = 11 Description: AUTOSUB RDI 150kHz downward looking and RDI 300kHz upward looking ADCPs | ||||||||||||||||||||||||||||||||||||||||||||
Current profiler (eg ADCP) | Quantity: activity duration in days = 18 Description: Continuous along-track vessel mounted RDI 150kHz ADCP measurements. | ||||||||||||||||||||||||||||||||||||||||||||
Current profiler (eg ADCP) | Quantity: number of stations = 20 Description: Upward and downward looking lowered ADCPs. | ||||||||||||||||||||||||||||||||||||||||||||
Sea level (inc. bot. press., inverted echosounder) | Quantity: number of dives = 11 Description: AUTOSUB Kongsberg EM2000 multibeam upward looking swath system. | ||||||||||||||||||||||||||||||||||||||||||||
Other physical oceanographic measurements | Quantity: number of stations = 3 Description: Sea ice-validation programme - including: drilling, coring EM31 electromagnetic sounding system, snow probe and satellite data. | ||||||||||||||||||||||||||||||||||||||||||||
Other physical oceanographic measurements | Quantity: activity duration in days = 11 Description: Sea-ice watch describing total concentration, open water distance between ice floes, and type of ice, ice thickness, floe size, ice topography, snow type and snow thickness. | ||||||||||||||||||||||||||||||||||||||||||||
Biology and fisheries | |||||||||||||||||||||||||||||||||||||||||||||
Phytoplankton | Quantity: activity duration in days = 18 Description: Continuous plankton recorder | ||||||||||||||||||||||||||||||||||||||||||||
Zooplankton | Quantity: activity duration in days = 18 Description: Continuous plankton recorder | ||||||||||||||||||||||||||||||||||||||||||||
Geology and geophysics | |||||||||||||||||||||||||||||||||||||||||||||
Single-beam echosounding | Quantity: activity duration in days = 18 Description: Continuous along track TOPAS sub-bottom profiler. | ||||||||||||||||||||||||||||||||||||||||||||
Multi-beam echosounding | Quantity: activity duration in days = 18 Description: Continuous along-track EM-120 multi-beam swath bathymetry. | ||||||||||||||||||||||||||||||||||||||||||||
Data held at BODC | Get data | ||||||||||||||||||||||||||||||||||||||||||||
Series/Profiles | |||||||||||||||||||||||||||||||||||||||||||||
3 Acoustic doppler current profiler | Horizontal spatial co-ordinates Date and time Vertical spatial coordinates Vertical velocity of the water column (currents) Horizontal velocity of the water column (currents) Metadata parameters Acoustic backscatter in the water column Horizontal spatial co-ordinates Date and time Vertical spatial coordinates Vertical velocity of the water column (currents) Horizontal velocity of the water column (currents) Metadata parameters Acoustic backscatter in the water column
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8 Bathythermograph (MBT/XBT) | Sound velocity and travel time in the water column Reference numbers Temperature of the water column Vertical spatial coordinates Sound velocity and travel time in the water column Reference numbers Temperature of the water column Vertical spatial coordinates
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10 CTD in towed or autonomous underwater vehicle | Reference numbers Horizontal spatial co-ordinates Date and time Salinity of the water column Temperature of the water column Vertical spatial coordinates Dissolved oxygen parameters in the water column Density of the water column Reference numbers Horizontal spatial co-ordinates Date and time Salinity of the water column Temperature of the water column Vertical spatial coordinates Dissolved oxygen parameters in the water column Density of the water column
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1 Meteorological data logger | Visible waveband radiance and irradiance measurements in the atmosphere Horizontal spatial co-ordinates Air pressure Date and time Air temperature Wind strength and direction Solar Radiation Atmospheric humidity Visible waveband radiance and irradiance measurements in the atmosphere Horizontal spatial co-ordinates Air pressure Date and time Air temperature Wind strength and direction Solar Radiation Atmospheric humidity
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1 Ship's non-toxic supply | Sound velocity and travel time in the water column Horizontal spatial co-ordinates Date and time Salinity of the water column Temperature of the water column Metadata parameters Electrical conductivity of the water column Chlorophyll pigment concentrations in water bodies Sound velocity and travel time in the water column Horizontal spatial co-ordinates Date and time Salinity of the water column Temperature of the water column Metadata parameters Electrical conductivity of the water column Chlorophyll pigment concentrations in water bodies
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1 Single-beam echosounder | Horizontal spatial co-ordinates Date and time 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
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Discrete samples | |||||||||||||||||||||||||||||||||||||||||||||
20 CTD frame plus rosette sampler | Transmittance and attenuance of the water column Salinity of the water column Temperature of the water column Dissolved oxygen parameters in the water column Concentration of suspended particulate material in the water column Density of the water column Raw suspended particulate material concentration sensor output Electrical conductivity of the water column Raw fluorometer output Chlorophyll pigment concentrations in water bodies | ||||||||||||||||||||||||||||||||||||||||||||
8 Expendable Bathythermograph | |||||||||||||||||||||||||||||||||||||||||||||
9 Motorised ice-corer drilling down into ice | Horizontal spatial co-ordinates Snow and ice mass, thickness and extent |