Stratospheric ozone changes from explosive tropical volcanoes: Modelling and ice core constraints

• Published in: Journal of Geophysical Research: Atmospheres
• Main Authors: Ming, Alison, Winton, V. Holly L., Keeble, James, Abraham, Nathan, L, Dalvi, Mohit, C, Griffiths, Paul, Caillon, Nicolas, Jones, Anna, E, Mulvaney, Robert, Savarino, Joël, Frey, Markus, M, Yang, Xin
• Other Authors: Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), ANR-16-CE01-0011,EAIIST,Projet International d'exploration de la calotte polaire de l'Antarctique de l'Est(2016)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2020
• Subjects: [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology; [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology; ice core
• Online Access: https://hal.science/hal-03402301; https://hal.science/hal-03402301/document; https://hal.science/hal-03402301/file/ISOL_ICE_volcano.pdf; https://doi.org/10.1029/2019jd032290

International audience • The tropical volcanic eruption in the model shows that the sign of the ozone change is highly sensitive to stratospheric chlorine amounts. • δ 15 N(NO − 3) (a proxy for surface ultraviolet radiation) from the Samalas eruption is obscured by inter-annual variability in the ice core. • δ 15 N(NO − 3) changes are unlikely to be synchronous with volcanic sulphate peaks due to different pathways for these signals to reach the ice.