Multi-model effective radiative forcing of the 2020 sulfur cap for shipping

Skeie, Ragnhild Bieltvedt; Byrom, Rachael; Hodnebrog, Øivind; Jouan, Caroline; Myhre, Gunnar

doi:https://doi.org/10.5194/acp-24-13361-2024

Articles | Volume 24, issue 23

https://doi.org/10.5194/acp-24-13361-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-24-13361-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 23

Research article

|

04 Dec 2024

Research article |

| 04 Dec 2024

Multi-model effective radiative forcing of the 2020 sulfur cap for shipping

Ragnhild Bieltvedt Skeie, Rachael Byrom, Øivind Hodnebrog, Caroline Jouan, and Gunnar Myhre

Supplement

https://doi.org/10.5194/acp-24-13361-2024-supplement

Data sets

CEDS v_2024_04_01 Release Emission Data Rachel Hoesly and Steven Smith https://doi.org/10.5281/zenodo.10904361

CEDS v_2021_04_21 Release Emission Data (v_2021_02_05) Patrick R. O’Rourke et al. https://doi.org/10.5281/zenodo.4741285

ragnhibs/imo2020: V1.1 Ragnhild Bieltvedt Skeie https://doi.org/10.5281/zenodo.13710977

Multimodel results of 2020 shipping regulation Ragnhild Bieltvedt Skeie et al. https://doi.org/10.11582/2024.00157

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Short summary

In 2020, new regulations by the International Maritime Organization regarding sulfur emissions came into force, reducing emissions of SO₂ from the shipping sector by approximately 80 %. In this study, we use multiple models to calculate how much the Earth energy balance changed due to the emission reduction or the so-called effective radiative forcing. The calculated effective radiative forcing is weak, comparable to the effect of the increase in CO₂ over the last 2 to 3 years.