Key points are not available for this paper at this time.
• Long-term UVER aerosol forcing quantified using SZA-resolved direct-method analysis • AFE and ARF peak at low SZA and weaken toward high SZA due to radiative geometry • AOD 380 declines (∼45%) without surface UV brightening, indicating optical-property control • Coarse and absorbing aerosols dominate UV forcing magnitude over aerosol load alone • Angular and microphysical effects are critical for UV forcing parameterizations
Lozano et al. (Fri,) studied this question.