EGU2020-289
https://doi.org/10.5194/egusphere-egu2020-289
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

How volcanism impact on the variability of the South American Monsoon System and the associated Atlantic Subtropical Cell

Laura Sobral Verona1, Ilana Wainer1, and Myriam Khodri2
Laura Sobral Verona et al.
  • 1OC2, IO, Sao Paulo University (USP), São Paulo, Brazil (laura.sverona@gmail.com)
  • 2LOCEAN, IRD/IPSL, Sorbonne University, Paris, France

Large volcanic eruptions can affect the global climate through changes in atmospheric and ocean circulation. Understanding the influence of volcanic eruptions on the hydroclimate over monsoon regions is of great scientific and social importance. The South America Monsoon System (SAMS) is the most important climatic feature of the continent. Both the Intertropical and the South Atlantic wind convergence zones (ITCZ and SACZ, respectively) are fundamental components of the SAMS. They show variations on a broad range of scales, dependent on complex multi-system interactions with the adjacent Atlantic Ocean and teleconnections. Also driven by the winds, the Atlantic Subtropical Cell (STC) is the link between the subduction zone in the subtropical gyre with the tropics. Hence, the STC influence equatorial sea surface temperature variability on interannual to decadal scales in the tropical Atlantic Ocean. In order to improve our understanding of the responses of the ocean-atmosphere system to the volcanic forcing, we aim to identify the dominant mechanisms of seasonal-to-interdecadal variability of the SAMS and the Atlantic STC after large Pinatubo-like (1991) and Tambora-like (1815) eruptions relying on the VolMIP model intercomparison project experiments.

How to cite: Sobral Verona, L., Wainer, I., and Khodri, M.: How volcanism impact on the variability of the South American Monsoon System and the associated Atlantic Subtropical Cell, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-289, https://doi.org/10.5194/egusphere-egu2020-289, 2019

This abstract will not be presented.