Pore space percolation in sea ice single crystals
نویسندگان
چکیده
منابع مشابه
Pore space percolation in sea ice single crystals
[1] We have imaged sea ice single crystals with X-ray computed tomography, and characterized the thermal evolution of the pore space with percolation theory. Between !18!C and !3!C the porosity ranged from 2 to 12% and we found arrays of near-parallel intracrystalline brine layers whose connectivity and complex morphology varied with temperature. We have computed key porosity-dependent function...
متن کاملThe Percolation Phase Transition in Sea Ice
glund, Ed. (Wiley, Toronto, 1986), pp. 407–422. 20. R. B. Alley et al., Geology 25, 483 (1997); J. Chappellaz et al., Nature 366, 443 (1993); P. A. Mayewski et al., Science 263, 1747 (1994). 21. K. A. Hughen, J. T. Overpeck, L. C. Peterson, S. Trumbore, Nature 380, 51 (1996); J. C. Stager and P. A. Mayewski, Science 276, 1834 (1997); U. von Grafenstein, H. Erlenkeuser, J. Muller, J. Jouzel, S. ...
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Sea ice exhibits a marked transition in its fluid transport properties at a critical brine volume fraction pc of about 5 percent, or temperature Tc of about -5 degreesC for salinity of 5 parts per thousand. For temperatures warmer than Tc, brine carrying heat and nutrients can move through the ice, whereas for colder temperatures the ice is impermeable. This transition plays a key role in the g...
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[1] We report on the discovery of the mineral ikaite (CaCO3 6H2O) in sea-ice from the Southern Ocean. The precipitation of CaCO3 during the freezing of seawater has previously been predicted from thermodynamic modelling, indirect measurements, and has been documented in artificial sea ice during laboratory experiments but has not been reported for natural sea-ice. It is assumed that CaCO3 forma...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2009
ISSN: 0148-0227
DOI: 10.1029/2008jc005145