Key points are not available for this paper at this time.
The Jan. 15, 2022, Hunga eruption increased aerosols and H2O in the southern hemisphere stratosphere and then dispersed throughout 2022/3.• Stratospheric water vapor, ozone, temperature, and aerosol optical depth contribute to the change in downward radiative fluxes.• Hunga produced a global change in tropopause downward radiative flux of -0.17 and ±0.07 W/m 2 over the two-year period.
Schoeberl et al. (Mon,) studied this question.