The influence of the Calbuco eruption on the 2015 Antarctic ozone hole in a fully coupled chemistry-climate model
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Author(s)
Ivy, Diane J
Solomon, Susan
Kinnison, Doug
Mills, Michael J.
Schmidt, Anja
Neely, Ryan R.
Date Issued
March 2017
Journal
Geophysical Research Letters
Publisher
American Geophysical Union (AGU)
Citation
Ivy, Diane J. et al. “The Influence of the Calbuco Eruption on the 2015 Antarctic Ozone Hole in a Fully Coupled Chemistry-Climate Model.” Geophysical Research Letters 44, 5 (March 2017): 2556–2561 © 2017 American Geophysical Union
Version
Final published version
Abstract
Recent research has demonstrated that the concentrations of anthropogenic halocarbons have decreased in response to the worldwide phaseout of ozone depleting substances. Yet in 2015 the Antarctic ozone hole reached a historical record daily average size in October. Model simulations with specified dynamics and temperatures based on a reanalysis suggested that the record size was likely due to the eruption of Calbuco but did not allow for fully coupled dynamical or thermal feedbacks. We present simulations of the impact of the 2015 Calbuco eruption on the stratosphere using the Whole Atmosphere Community Climate Model with interactive dynamics and temperatures. Comparisons of the interactive and specified dynamics simulations indicate that chemical ozone depletion due to volcanic aerosols played a key role in establishing the record‐sized ozone hole of October 2015. The analysis of an ensemble of interactive simulations with and without volcanic aerosols suggests that the forced response to the eruption of Calbuco was an increase in the size of the ozone hole by 4.5 × 10⁶ km². Keywords: Antarctic ozone; volcanic aerosols
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Massachusetts Institute of Technology. Department of Chemistry
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1002/2016GL071925
