Strong modification of stratospheric ozone forcing by cloud and sea-ice adjustments

• Published in: Atmospheric Chemistry and Physics
• Main Authors: Xia, Yan, Hu, Yongyun, Huang, Yi
• Other Authors: Xia, Y (reprint author), McGill Univ, Dept Atmospher & Ocean Sci, Montreal, PQ, Canada., McGill Univ, Dept Atmospher & Ocean Sci, Montreal, PQ, Canada., Peking Univ, Dept Atmospher & Ocean Sci, Beijing, Peoples R China.
• Format: Journal/Newspaper
• Language: English
• Published: ATMOSPHERIC CHEMISTRY AND PHYSICS 2016
• Subjects: TROPOSPHERIC TEMPERATURE RESPONSE; EDDY-DRIVEN JET; SOUTHERN-HEMISPHERE; CLIMATE SENSITIVITY; MODEL; SYSTEM; 21ST-CENTURY; FEEDBACKS; TRANSPORT; RECOVERY; Canada; Sea ice
• Online Access: https://hdl.handle.net/20.500.11897/492508; https://doi.org/10.5194/acp-16-7559-2016

We investigate the climatic impact of stratospheric ozone recovery (SOR), with a focus on the surface temperature change in atmosphere-slab ocean coupled climate simulations. We find that although SOR would cause significant surface warming (global mean: 0.2aEuro-K) in a climate free of clouds and sea ice, it causes surface cooling (-0.06aEuro-K) in the real climate. The results here are especially interesting in that the stratosphere-adjusted radiative forcing is positive in both cases. Radiation diagnosis shows that the surface cooling is mainly due to a strong radiative effect resulting from significant reduction of global high clouds and, to a lesser extent, from an increase in high-latitude sea ice. Our simulation experiments suggest that clouds and sea ice are sensitive to stratospheric ozone perturbation, which constitutes a significant radiative adjustment that influences the sign and magnitude of the global surface temperature change. Natural Sciences and Engineering Research Council of Canada [RGPIN 418305-13]; Fonds de recherche du Quebec [NC-181248]; China Scholarship Council (CSC) [201405990230]; National Natural Science Foundation of China (NSFC) [41530423, 41375072] SCI(E) ARTICLE [e-mail] 12 7559-7567 16