气候变化领域集成服务门户(CCPortal): The Role of the SO 2 Radiative Effect in Sustaining the Volcanic Winter and Soothing the Toba Impact on Climate

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DOI	10.1029/2019JD031726
	The Role of the SO 2 Radiative Effect in Sustaining the Volcanic Winter and Soothing the Toba Impact on Climate
	Osipov S.; Stenchikov G.; Tsigaridis K.; LeGrande A.N.; Bauer S.E.
发表日期	2020
ISSN	2169897X
卷号	125 期号:2
英文摘要	Volcanic eruptions are an important climate driver. The impact of Pinatubo-sized eruptions has been observed and is well constrained. The magnitude and duration of volcanic winter effects after supereruptions such as Toba remain disputed due to disagreement between the strong cooling predicted by models and much milder climate perturbations according to the paleodata. Here we present a reevaluated climate impact of a Toba-sized supereruption based on up-to-date GISS ModelE simulations. In this study, we account for all known primary mechanisms that govern the evolution of the volcanic plume and their nonlinear interactions. The SO2 radiative effects are evaluated for the first time in coupled climate simulations with the interactive atmospheric chemistry module. We found that SO2 effects on photochemistry, dynamics, and radiative forcing are especially prominent. Due to strong absorption in ultraviolet, SO2 feedback on photochemistry partially offsets the limiting effect associated with aerosol microphysical processes. SO2 greenhouse warming soothes the radiative cooling exerted by sulfate aerosols. SO2 absorption in the shortwave and longwave causes radiative heating and lofting of the volcanic plume, and boosts the efficiency of SO2 impact on photochemistry. Our analysis shows that SO2 lifetime and magnitude of effects scale up and increase with the amount of emitted material. For a Pinatubo-sized eruption, SO2 feedbacks on chemistry and dynamics are relevant only during the initial stage of the volcanic plume evolution, while local SO2 concentrations are high. For a Toba-sized eruption, SO2 effects are as important as sulfate aerosols and produce a less extreme volcanic winter. © 2020. The Authors.
英文关键词	climate impact; sulfate aerosols; sulfur dioxide; supereruption; Toba; volcanic winter
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186229
作者单位	Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia; Atmospheric Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany; Center for Climate Systems Research, Columbia University, New York, NY, United States; NASA Goddard Institute for Space Studies, New York, NY, United States
推荐引用方式 GB/T 7714	Osipov S.,Stenchikov G.,Tsigaridis K.,et al. The Role of the SO 2 Radiative Effect in Sustaining the Volcanic Winter and Soothing the Toba Impact on Climate[J],2020,125(2).
APA	Osipov S.,Stenchikov G.,Tsigaridis K.,LeGrande A.N.,&Bauer S.E..(2020).The Role of the SO 2 Radiative Effect in Sustaining the Volcanic Winter and Soothing the Toba Impact on Climate.Journal of Geophysical Research: Atmospheres,125(2).
MLA	Osipov S.,et al."The Role of the SO 2 Radiative Effect in Sustaining the Volcanic Winter and Soothing the Toba Impact on Climate".Journal of Geophysical Research: Atmospheres 125.2(2020).