Why Do Antarctic Ozone Recovery Trends Vary?

ABSTRACT: We use satellite ozone records and Global Modeling Initiative chemistry transport model simulations integrated with Modern Era Retrospective for Research and Analysis 2 meteorology to identify a metric that accurately captures the trend in Antarctic ozone attributable to the decline in ozone depleting substances (ODSs). The GMI CTM Baseline simulation with realistically varying ODS levels closely matches observed interannual to decadal scale variations in Antarctic September ozone over the past four decades. The expected increase or recovery trend is obtained from the differences between the Baseline simulation and one with identical meteorology and fixed 1995 ODS levels. The differences show that vortex-averaged column O₃ has the greatest sensitivity to ODS change from 1 to 20

SUBMITTER: Strahan SE 

PROVIDER: S-EPMC7027592 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature