A decade (2008–2017) of water stable isotope composition of precipitation at Concordia Station, East Antarctica

• DOI: 10.5194/tc-18-3911-2024
• Publication Date: 2024-09-03T05:04:48Z
• Authors: Giuliano Dreossi; Mauro Masiol; Barbara Stenni; Daniele Zannoni; Claudio Scarchilli; Virginia Ciardini; Mathieu Casado; Amaëlle Landais; Martin Werner; Alexandre Cauquoin; Giampietro Casasanta; Massimo Del Guasta; Vittoria Posocco; Carlo Barbante
• Keywords: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere; [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; water isotope composition, paleoclimate, general circulation models; QE1-996.5; 550; Atmosphere; [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere; Geology; [SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment; Environmental sciences; GE1-350; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment; environment

Abstract. A 10-year record of oxygen and hydrogen isotopic composition precipitation is presented here: from 2008 to 2017, 1483 daily samples were collected year-round on a raised platform at Concordia Station, East Antarctica. Weather data retrieved the Italian Antarctic Meteo-Climatological Observatory automatic weather station (AWS), while ERA5 was used estimate total precipitation. The δ–temperature relationships moderately high for (r2=0.63 0.64 δ18O δ2H, respectively) stronger using monthly (r2=0.82 both δ2H), with slope about 0.5 ‰ °C−1 δ18O/TAWS (3.5 δ2H/TAWS), which remains consistent also annual averages. input signal snow–ice system, this dataset will be useful improve interpretation paleoclimate records promote better understanding post-depositional processes affecting in ice cores. This represents benchmark evaluation isotope-enabled general circulation models. Here, ECHAM6-wiso output compared experimental data, showing good δ2H but not d-excess, nonetheless marking substantial improvement previous release model.