dbcp workshop, buenos aires, october 2005 a novel ice platform for ipy
TRANSCRIPT
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DBCP Workshop, Buenos Aires, October 2005
A novel ice platform for IPY
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DBCP Workshop, Buenos Aires, October 2005
Background
• Role of sea ice in climate
change
• Several polar deployments
over last few years• Use of Iridium and Argos• Opportunities during IPY
2007-8• Development of new
platform for flux and hydrographic measurements
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DBCP Workshop, Buenos Aires, October 2005
Global oceanic heat flux
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DBCP Workshop, Buenos Aires, October 2005
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DBCP Workshop, Buenos Aires, October 2005
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DBCP Workshop, Buenos Aires, October 2005
Arctic Synoptic Basin-wide Oceanography (ASBO)
• Quantify the current fresh water (both solid and liquid) and salt content of the Arctic Ocean
• Quantify the heat and freshwater exchanges between the ocean, atmosphere, sea ice and land within the Arctic basin and to surrounding ocean basins
• Provide an understanding of past changes in Arctic Ocean and North Atlantic salinity and temperature structure using numerical models, satellite data and historical datasets
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DBCP Workshop, Buenos Aires, October 2005
Proposed IPY cruise tracks (2007)
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DBCP Workshop, Buenos Aires, October 2005
Ice platforms• Surface meteorology
• Vaisala WXT510 multi sensor• ? SVP-B
• Net surface radiation fluxes• Kipp & Zonen CNR net radiometers
• Heat flux through sea ice• Ice mass balance• Boundary layer currents• Sub-ice CTDs• GPS• Web cam• Iridium and Argos comms
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DBCP Workshop, Buenos Aires, October 2005
In-ice thermistor chains• Chain 1
• Wholly within ice• Diffusive heat flux measurements
• Chain 2• Across ice-air interface
• Position of interface for mass balance• B/L current in ‘hot-wire anemometer’ mode
• Chain 3• Across ice-water interface
• Position of interface for mass balance• B/L current in ‘hot-wire anemometer’ mode
• Possible use of Dallas ‘1-wire’ sensors• Ease of cabling• Poor accuracy, but good stability and
resolution
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DBCP Workshop, Buenos Aires, October 2005
In-ice thermistor chains
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DBCP Workshop, Buenos Aires, October 2005
Sub-ice CTDs
• Use ‘HOMER’ profiler in inverted mode, or commercial system
• Profile depth set using GPS and bathymetric look-up table
• Data transfer by IR link (HOMER) or inductive modem
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DBCP Workshop, Buenos Aires, October 2005
HOMER profiler
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DBCP Workshop, Buenos Aires, October 2005
HOMER winch assembly
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DBCP Workshop, Buenos Aires, October 2005
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DBCP Workshop, Buenos Aires, October 2005
Gracias!