Lidar signatures of volcanic and biomass burning aerosols after long-range transport at the french antarctic base Dumont d'Urville

• Main Authors: Jumelet, Julien, Bekki, Slimane, Keckhut, Philippe
• Other Authors: STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2018
• Subjects: [SDU]Sciences of the Universe [physics]; Antarctic; The Antarctic; Dumont d'Urville; Dumont-d'Urville; Base Dumont-d'Urville; Antarc*
• Online Access: https://insu.hal.science/insu-04421379

International audience In the frame of the NDACC (Network for Atmospheric Composition Changes), lidar time series are routinely acquired at the french antarctic base Dumont d'Urville. Aerosol and cloud profiles are monitored using a 532nm backscatter and depolarization stratospheric lidar system. Combining lidar measurements, microphysical/transport modelling and satellite measurements, we present several case studies involving long-range transport of sulfate or carbonated aerosols among wich evidences of the 2015 calbuco plume signature at the beginning of the Antarctic Polar Stratospheric Cloud season. These records highlight a potential underestimation of the impact of deep transport on the antarctic atmosphere regarding cloud chemistry and ground ice properties through sedimentation.