Criegee Intermediate as a Major Atmospheric Sink for Methane Sulfonamide: A Pathway to Functionalized Hydroperoxides

-methacrolein oxide reduces from an upper bound of ∼19 days at 298 K to ∼1 day at 200 K, implying that the lifetime decreases under colder tropospheric conditions. The lifetimes of MSAM with respect to the reactions with most CIs considered here surpass those of OH reactions (∼80 days). CI-mediated reactions, thus, emerge as a key process controlling MSAM fate, with implications for marine aerosol composition and climate-relevant processes.