Abrupt reduction in shipping emission as an inadvertent geoengineering termination shock produces substantial radiative warming.

ABSTRACT: Human activities affect the Earth's climate through modifying the composition of the atmosphere, which then creates radiative forcing that drives climate change. The warming effect of anthropogenic greenhouse gases has been partially balanced by the cooling effect of anthropogenic aerosols. In 2020, fuel regulations abruptly reduced the emission of sulfur dioxide from international shipping by about 80% and created an inadvertent geoengineering termination shock with global impact. Here we estimate the regulation leads to a radiative forcing of +0.2±0.11Wm^-2 averaged over the global ocean. The amount of radiative forcing could lead to a doubling (or more) of the warming rate in the 2020 s compared with the rate since 1980 with strong spatiotemporal heterogeneity. The warming eff

SUBMITTER: Yuan T 

PROVIDER: S-EPMC11139642 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature