Upward flushing of sea water through first year ice

E.J.‐J. Hudier, R.G. Ingram, K. Shirasawa
1995 ATMOSPHERE-OCEAN  
Observations in both thé Ice and slush loyers suggest that sea water intrudes into thé snow loyer following a snow storm. Ice température values recorded at 1 cm below thé snow-ice interface show that thé upward flux of sea water is of short duration. This is followed by a period of intense brine drainage characterized by thé migration of a salty brine loyer, with salinities up to 42 psu. Thèse results suggest that a snow storm induces a complète (upward) flushing of thé brine channel network
more » ... e channel network and major modifications of snow and ice characteristics. Melt rates and dowmvard brine fluxes were calculated using salinity measured in a 40 cm deep box placed on thé ice-water interface, which isolated a 50 x 50 cm area of sea ice from océan mixing processes. In this semi-isolated environment, observed salinity changes allowed us to détermine melt water fluxes and brine drainage or flushing even though ice thickness measurements did not show any significant change. Melt rates up to 21 cm/month and équivalent growth rates up to 32 cm/month were measured. RÉSUMÉ En observant les couches de glace et de sorbet on a constaté que l'eau de mer pénètre la couverture de neige suite à une tempête de neige. La température de la glace (3) 1995, 569-580 0705-5900/95/0000-0569SO 1.25/0
doi:10.1080/07055900.1995.9649545 fatcat:7valnhmqnjhvnacg3vtueamt5m