The Impact of 2022 Hunga Tonga‐Hunga Ha'apai (Hunga) Eruption on Stratospheric Circulation and Climate
Name
JGR Atmospheres - 2025 - Yook - The Impact of 2022 Hunga Tonga‐Hunga Ha apai Hunga Eruption on Stratospheric Circulation.pdf
Size
3.32 MB
Format
Adobe PDF
Checksum (MD5)
f017661459ca601c1f5617e47a1ec5ec
Author(s)
Yook, Simchan
Solomon, Susan
Wang, Xinyue
Date Issued
March 17, 2025
Journal
Journal of Geophysical Research: Atmospheres
Publisher
Wiley
Citation
Yook, S., Solomon, S., & Wang, X. (2025). The impact of 2022 hunga tonga-hunga ha'apai (hunga) eruption on stratospheric circulation and climate. Journal of Geophysical Research: Atmospheres, 130, e2024JD042943.
Version
Final published version
Abstract
The Hunga Tonga‐Hunga Ha'apai (Hunga) volcanic eruption in January 2022 injected asubstantial amount of water vapor and a moderate amount of SO2 into the stratosphere. Both satelliteobservations in 2022 and subsequent chemistry‐climate model simulations forced by realistic Hungaperturbations reveal large‐scale cooling in the Southern Hemisphere (SH) tropical to subtropical stratospherefollowing the Hunga eruption. This study analyzes the drivers of this cooling, including the distinctive role ofanomalies in water vapor, ozone, and sulfate aerosol concentration on the simulated climate response to theHunga volcanic forcing, based on climate simulations with prescribed chemistry/aerosol. Simulated circulationand temperature anomalies based on specified‐chemistry simulations show good agreement with previouscoupled‐chemistry simulations and indicate that each forcing of ozone, water vapor, and sulfate aerosol from theHunga volcanic eruption contributed to the circulation and temperature anomalies in the SH stratosphere. Ourresults also suggest that (a) the large‐scale stratospheric cooling during the austral winter was mainly induced bychanges in dynamical processes, not by radiative processes, and that (b) the radiative feedback from negativeozone anomalies contributed to the prolonged cold temperature anomalies in the lower stratosphere (∼70 hPalevel) and hence to long lasting cold conditions of the polar vortex.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivatives
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1029/2024JD042943
