Nine year of oxygen and hydrogen isotopic composition of precipitation at Concordia station, East Antarctica

Up to now, few records of the isotopic composition of precipitation in Antarctica are available, most of them limited in time or sampling frequency. Here we present a 9-year long ?18O and ?D record (2008-2016) in snow deposition at Concordia base, East Antarctica. The precipitation is collected on a daily basis on a raised platform (1 m), placed in the clean area of the station; the precipitation collection is still being carried out under the frame of the SolarIce project. The atmospheric processes governing the isotopic composition of precipitation in the Antarctic plateau are yet to be fully understood, as well as the post-depositional processes altering the pristine isotopic signal of surface snow. A better comprehension of these physical mechanisms is of crucial importance for interpreting the isotopic records from ice cores drilled in the low accumulation area of Antarctica. A good correlation between isotopes in precipitation and temperature is observed at both seasonal and interannual scale; the lowest temperature and isotopic values are usually recorded during winters characterized by a strongly positive Southern Annular Mode index. To improve the paleothermometer obtained from isotopes from Antarctica ice, we combine precipitation, vapor and snow isotopic composition obtained at Dome C, and study their variations in parallel with the low troposphere meteorological conditions, such as 2-m temperature, vertical temperature profiles, wind speed, water content, and condensation layer height are continuously measured by means of AWS, LIDAR, radiosonde, while an "ice camera", scanning snowfall with a 1-hour frequency, provides information on snow crystals.