Year: 2024
Type: article
Abstract: . New regulations of sulphur emissions from shipping were introduced in 2020, reducing emissions of SO2 from international shipping by ~80 %. As SO2 is an aerosol precursor, this drop in emission over the ocean will weaken the total aerosol effective radiative forcing (ERF) that historically has masked an uncertain fraction of the warming due to increased concentration of greenhouse gases in the atmosphere. Here, we use four global climate models and a chemistry transport model to calculate the ERF due to an 80 % reduction in SO2 emissions from international shipping relative to 2019 emission estimates. The model means of the ERF range from 0.06 to 0.09 W m-2 corresponding to the ERF due to the increase in CO2 concentration over the last two to three years.
Authors: Ragnhild Bieltvedt Skeie, Rachael Byrom, Øivind Hodnebrog, Caroline Jouan, Gunnar Myhre
Institution: CICERO Center for International Climate Research
Language: English
Subfield: Environmental Engineering
Field: Environmental Science
Domain: Physical Sciences
SDG: Climate action
Open Access status: gold
Estimated APC paid: $1,725
Awards: G1397322681, G4618703047
OpenAlex ID: W4405008356