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AGU journal highlights -- Sept. 6, 2007
Date:9/10/2007

uthors:
J. T. Gosling: Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, Colorado, U.S.A.;
T. D. Phan and R. P. Lin: Space Sciences Laboratory, University of California, Berkeley, California, U.S.A.;
A. Szabo: NASA Goddard Space Flight Center, Greenbelt, Maryland, U.S.A.

Source: Geophysical Research Letters (GRL) paper 10.1029/2007GL030706, 2007, http://dx.doi.org/10.1029/2007GL030706

9. Understanding permeability in sea ice

Polar sea ice is an indicator and regulator of climate change; its thinning and retreat show the effects of climate warming, and its presence greatly reduces solar heating of the polar oceans. Sea ice also is a primary habitat for microbial communities, sustaining marine food webs. The permeability of sea ice and its ability to transport brine are important to many problems in geophysics and biology, yet remain poorly understood. Golden et al. generate a unified picture of sea ice permeability through analytical and numerical modeling, as well as through comparisons with field and laboratory measurements. The latter included X-ray computed tomography of sea ice pore microstructure as a function of temperature. Their study demonstrates that sea ice displays universal transport properties similar to fluid transport in some crustal rocks, though over a much narrower temperature range. The authors present permeability in terms of temperature and bulk salinity, preparing the way for more realistic representations of sea ice evolution in climate and biogeochemical models.

Title:
Thermal evolution of permeability and microstructure in sea ice

Authors:
K. M. Golden, A. L. Heaton, and J. Zhu: Department of Mathematics, University of Utah, Salt Lake City, Utah, U.S.A.;
H. Eicken and J. Miner: Geophysical Institute, University of Alaska, Fairbanks, Alaska, U.S.A.;
D. Pringle: Arctic Regio
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Contact: Peter Weiss
pweiss@agu.org
202-777-7507
American Geophysical Union
Source:Eurekalert

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