Articles | Volume 21, issue 14
Atmos. Chem. Phys., 21, 11379–11404, 2021
Atmos. Chem. Phys., 21, 11379–11404, 2021

Research article 28 Jul 2021

Research article | 28 Jul 2021

Modeling study of the impact of SO2 volcanic passive emissions on the tropospheric sulfur budget

Claire Lamotte et al.

Data sets

Multi-Satellite Volcanic Sulfur Dioxide L4 Long-Term Global Database V3 Simon Carn

A decade of global volcanic SO2 emissions measured from space S. Carn, V. Fioletov, C. McLinden, C. Li, and N. Krotkov

OMI/Aura Sulphur Dioxide (SO2) Total Column 1-orbit L2 Swath 13x24 km V003 Can Li, Nickolay A. Krotkov, Peter Leonard, and Joanna Joiner

Short summary
Improvements are made in a global chemical transfer model by considering a new volcanic SO2 emissions inventory, with more volcanoes referenced and more information on the altitude of injection. Better constraining volcanic emissions with this inventory improves the global, but mostly local, tropospheric sulfur composition. The tropospheric sulfur budget shows a nonlinearity to the volcanic contribution, especially to the sulfate aerosol burden and sulfur wet deposition.
Final-revised paper