Seasonal variations of 17O-excess and d-excess in snow precipitation at Vostok station, East Antarctica.

The article presents the first seasonal variations of 17O-excess and d-excess to offer an analogy with glacial climatic conditions in Vostok Station, Antarctica on an event basis over one year. It mentions that the 17O-excess and d-excess variations can be explained through the influence of low temperatures' kinetic fractionation. It states that the comparison with simple isotopic models affirms the explanation, but cannot explain the association between temperature, 17O-excess and d-excess without a particular relationship between surface temperature and condensation.