--- Horace, Your post and thawing conditions in the great North- plus this web page:
http://reporter.leeds.ac.uk/press_releases/current/frost.htm ... brings to mind an old musing - i.e. the possible natural enrichment of the deuterium ratio in ice formations in norther latitudes... i.e. those exposed surfaces which go through sequential thawing and refreezing... this (in theory) would be due to the rather substantial difference in the melting point of heavy water combined with lower vapor pressure. Jones
