2023/10/10 by Mei Ting Mak, M. T. Mak, N. J. Mayne +13 · 1 voice · 2 citations
Earth and Planetary Sciences · Environmental Science · Physics and Astronomy · #Atmospheric Ozone and Climate #Atmospheric and Environmental Gas Dynamics #Atmospheric chemistry and aerosols #astro-ph.EP #physics.ao-ph
paper · pdf · doi:10.1029/2023jd039343
arxiv published 2023/10/10 · arxiv updated 2023/10/10 · openalex publication_date 2023/10/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Abstract We present results from 3D simulations of the Archean Earth including a prescribed (non‐interactive) spherical haze generated through a 1D photochemical model. Our simulations suggest that a thin haze layer, formed when CH 4 /CO 2 = 0.1, leads to global warming of ∼10.6 K due to the change of water vapor and cloud feedback, compared to the simulation without any haze. However, a thicker haze layer, formed when CH 4 /CO 2 > 0.1, leads to global cooling of up to ∼65 K as the scattering and absorption of shortwave radiation from the haze reduces the radiation from reaching the planetary surface. A thermal inversion is formed with a lower tropopause as the CH 4 /CO 2 ratio increases. The haze reaches an optical threshold thickness when CH 4 /CO 2 ∼ 0.175 beyond which the atmospheric structure and the global surface temperature do not vary much.