Measurements on air porosity of sea ice

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Journal titleAnnals of Glaciology
Pages204208; # of pages: 5
Subjectice; air infiltration; porosity; sea water; air saturation ratio in meltwater; bubble pressure; arctic sea ice; infiltration d'air; porosite; eau de mer
AbstractThe air content of sea ice can be measured directly by melting a sample and collecting the released air, provided the air saturation ratio in the meltwater is known. The saturation ratio was found experimentally to be a function of three parameters: the time after an ice sample was melted, the average bubble size, and the air porosity of the sample. Since the last parameter is the term to be determined, an iteration method was employed in calculations of porosity. The bubble pressure was assumed to be at one atmospheric pressure. The vertical profile of air porosity was thus obtained for first-year sea ice in the Arctic. The results were in good agreement with estimations of porosity made from density values measured for the same samples. This indicates that the bubble pressure is near one atmospheric pressure.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number22615
NPARC number20386294
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Record identifier60d30e49-7444-4955-a98c-8e21b54254cd
Record created2012-07-25
Record modified2016-05-09
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