Environmental Isotopes in Ice and Snow

δD-δ18O Relationships and the Thermal History of Basal Ice Near the margins of two Glaciers in Lyngen, North Norway

“…The slope of 5.5 measured in this study is close to the first figure and, particularly in view of the spread in experimental determinations of icewater isotopic fractionation factors (Moser and Stichler, 1980), is therefore considered to be in good agreement with the Jouzel-Souchez model. The surface-ice and melt-water samples appear to be relatively depleted in 1BO compared with the local rainwater and snow (Fig.…”

Warm-based basal sediment entrainment and far-field Pleistocene origin evidenced in central Transantarctic blue ice through stable isotopes and internal structures

“…Though sublimation and melt do not cause isotopic fractionation (Moser and Stichler, 1980), loss to evaporation before refreezing or partial refreezing of the sublimate can both cause isotopic enrichment and divergence from the meteoric waterline. Enrichment from the partial freezing of sublimate has been documented in snow and firn (Stichler and others, 2001; Sokratov and Golubev, 2009).…”

The Marine Carbon System and Ocean Acidification during Phanerozoic Time

“…The oxygen isotopic record (d 18 O) is that of the oxygen in precipitation trapped in H 2 O ice that reflects changes in the oxygen isotope ratio of water vapour that was deposited as snow and consolidated into ice on the Antarctica ice cap . The d 18 O of H 2 O in atmospheric precipitation of the cold high latitudes is relatively low due to Rayleigh fractionation, -30‰ to -50‰ on the SMOW scale, whereas tropical surface ocean water has a d 18 O ≈ 0‰ (Moser and Stichler, 1980;Broecker, 1995) . Because the relationship between the isotopic composition of oxygen (and hydrogen) in precipitation and temperature has been studied intensively and observed empirically many times and a good correlation has been shown to exist, the d 18 O trend in polar ice can be interpreted as a record of polar ice temperature, and with some degree of certainty, the air temperature over the ice at the time of formation .…”