Chemistry Contribution to Stratospheric Ozone Depletion After the Unprecedented Water‐Rich Hunga Tonga Eruption

Zhang, Jun; Kinnison, Douglas; Zhu, Yunqian; Wang, Xinyue; Tilmes, Simone; Dube, Kimberlee; Randel, William

doi:10.1029/2023gl105762

i

Chemistry Contribution to Stratospheric Ozone Depletion After the Unprecedented Water‐Rich Hunga Tonga Eruption

2024
By Zhang, Jun ; Kinnison, Douglas ; Zhu, Yunqian ; ...

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Journal Title:

Geophysical Research Letters
Personal Author:

Zhang, Jun ; Kinnison, Douglas ; Zhu, Yunqian ; Wang, Xinyue ; Tilmes, Simone ; Dube, Kimberlee ; Randel, William
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; CSL (Chemical Sciences Laboratory)
Description:

Following the Hunga Tonga–Hunga Ha'apai (HTHH) eruption in January 2022, stratospheric ozone depletion was observed at Southern Hemisphere mid‐latitudes and over Antarctica during the 2022 austral wintertime and springtime, respectively. The eruption injected sulfur dioxide and unprecedented amounts of water vapor into the stratosphere. This work examines the chemistry contribution of the volcanic materials to ozone depletion using chemistry‐climate model simulations with nudged meteorology. Simulated 2022 ozone and nitrogen oxide (NOx = NO + NO2) anomalies show good agreement with satellite observations. We find that chemistry yields up to 4% ozone destruction at mid‐latitudes near ∼70 hPa in August and up to 20% ozone destruction over Antarctica near ∼80 hPa in October. Most of the ozone depletion is attributed to internal variability and dynamical changes forced by the eruption. Both the modeling and observations show a significant NOx reduction associated with the HTHH aerosol plume, indicating enhanced dinitrogen pentoxide hydrolysis on sulfate aerosol.
Source:

Geophysical Research Letters, 51(7)
DOI:

https://doi.org/10.1029/2023gl105762
ISSN:

0094-8276 ; 1944-8007
Format:

pdf
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Funding:

Grant no. NA17OAR4320101 ; Grant no. NA22OAR4320151
License:

https://creativecommons.org/licenses/by-nc-nd/4.0/
Rights Information:

CC BY-NC-ND
Compliance:

Library
Main Document Checksum:

urn:sha-512:78251df1483cd65bafc4727f55f2f902a785b0f59f0a33d3c153d4862f2c7c20369f5d1e1dd9295a6bad224325f14a5fccac28f6ab6e313f0e943e68a0db16cb
Download URL:

https://repository.library.noaa.gov/view/noaa/67764/noaa_67764_DS1.pdf
File Type:

[PDF - 1.28 MB ]

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