Hoar frost precipitation samples have a specific fingerprint with more depleted δ18O (about 5 ‰ below average) and higher deuterium excess (about 8 ‰ above average) values than other precipitation types. In accordance with results from precipitation monitoring at Vostok and Dome F, deuterium excess is anti-correlated with δ18O at daily and monthly scales, reaching maximum values in winter.

The slope of the temporal relationship between daily δ18O and 2 m air temperature is approximately 2 times smaller (0.49 ‰ ☌-1) than the average Antarctic spatial (0.8 ‰ ☌-1) relationship initially used for the interpretation of EPICA Dome C records. R2 Combining double low line 0.63 and 0.44, respectively for daily values). Water stable isotopes are more closely related to 2 m air temperature than to inversion temperature at all timescales (e.g. Relationships between local meteorological data and precipitation isotopic composition are investigated at daily, monthly and inter-annual scale, and for the different types of precipitation. Our sampling period (2008-2010) encompasses a warmer year (2009, +1.2 ☌ with respect to 2 m air temperature long-term average 1996-2010), with larger total precipitation and snowfall amounts (14 and 76 % above sampling period average, respectively), and a colder and drier year (2010, -1.8 ☌, 4 % below long-term and sampling period averages, respectively) with larger diamond dust amounts (49 % above sampling period average). We provide a multi-year record of daily precipitation types identified from crystal morphologies, daily precipitation amounts and isotopic composition. Here, we focus on the French-Italian Concordia Station, central East Antarctic plateau, where the European Project for Ice Coring in Antarctica (EPICA) Dome C ice cores were drilled. Past temperature reconstructions from Antarctic ice cores require a good quantification and understanding of the relationship between snow isotopic composition and 2 m air or inversion (condensation) temperature. Stenni, B., Scarchilli C., Masson-Delmotte V., Schlosser E., Ciardini V., Dreossi G., Grigioni P., Bonazza M., Cagnati A., Karlicek D., Risi C., Udisti R., and Valt M.Īir temperature, antarctica, atmospheric general circulation model, Concordia Station, Condensation, East Antarctica, Ice core, isotopic composition, monitoring, paleotemperature, precipitation (climatology), reconstruction, spatiotemporal analysis, stable isotope, temperature inversion

Three-year monitoring of stable isotopes of precipitation at Concordia Station, East Antarctica

East net monitor