September’s ozone hole was the biggest in 20 years. The warning signs appeared months ago

25 September 2026·

Hannah E. Kessenich

Annika Seppälä

,

Dan Smale

,

Veronika Meduna

· 0 min read

Source Document DOI

Type

Conference paper

Publication

The Conversation

Status

Peer-reviewed

Last updated on 4 October 2026

Atmospheric-Science

Hannah E. Kessenich

Authors

Hannah E. Kessenich

Lead Atmospheric Modeller

Annika Seppälä

Authors

Annika Seppälä

Lead, Atmospheric Science

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