气候变化领域集成服务门户(CCPortal): A New Volcanic Stratospheric Sulfate Aerosol Forcing Emulator (EVA_H): Comparison With Interactive Stratospheric Aerosol Models

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DOI	10.1029/2019JD031303
	A New Volcanic Stratospheric Sulfate Aerosol Forcing Emulator (EVA_H): Comparison With Interactive Stratospheric Aerosol Models
	Aubry T.J.; Toohey M.; Marshall L.; Schmidt A.; Jellinek A.M.
发表日期	2020
ISSN	2169897X
卷号	125 期号:3
英文摘要	Idealized models or emulators of volcanic aerosol forcing have been widely used to reconstruct the spatiotemporal evolution of past volcanic forcing. However, existing models, including the most recently developed Easy Volcanic Aerosol (EVA; Toohey et al., doi: 10.5194/gmd-2016-83), (i) do not account for the height of injection of volcanic SO (Formula presented.); (ii) prescribe a vertical structure for the forcing; and (iii) are often calibrated against a single eruption. We present a new idealized model, EVA_H, that addresses these limitations. Compared to EVA, EVA_H makes predictions of the global mean stratospheric aerosol optical depth that are (i) similar for the 1979–1998 period characterized by the large and high-altitude tropical SO (Formula presented.) injections of El Chichón (1982) and Mount Pinatubo (1991); (ii) significantly improved for the 1998–2015 period characterized by smaller eruptions with a large variety of injection latitudes and heights. Compared to EVA, the sensitivity of volcanic forcing to injection latitude and height in EVA_H is much more consistent with results from climate models that include interactive aerosol chemistry and microphysics, even though EVA_H remains less sensitive to eruption latitude than the latter models. We apply EVA_H to investigate potential biases and uncertainties in EVA-based volcanic forcing data sets from phase 6 of the Coupled Model Intercomparison Project (CMIP6). EVA and EVA_H forcing reconstructions do not significantly differ for tropical high-altitude volcanic injections. However, for high-latitude or low-altitude injections, our reconstructed forcing is significantly lower. This suggests that volcanic forcing in CMIP6 last millenium experiments may be overestimated for such eruptions. ©2019. The Authors.
英文关键词	idealized model; interactive stratospheric aerosol models; volcanic aerosol; volcanic forcing
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/186184
作者单位	Department of Geography, University of Cambridge, Cambridge, United Kingdom; GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Department of Chemistry, University of Cambridge, Cambridge, United Kingdom; Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
推荐引用方式 GB/T 7714	Aubry T.J.,Toohey M.,Marshall L.,et al. A New Volcanic Stratospheric Sulfate Aerosol Forcing Emulator (EVA_H): Comparison With Interactive Stratospheric Aerosol Models[J],2020,125(3).
APA	Aubry T.J.,Toohey M.,Marshall L.,Schmidt A.,&Jellinek A.M..(2020).A New Volcanic Stratospheric Sulfate Aerosol Forcing Emulator (EVA_H): Comparison With Interactive Stratospheric Aerosol Models.Journal of Geophysical Research: Atmospheres,125(3).
MLA	Aubry T.J.,et al."A New Volcanic Stratospheric Sulfate Aerosol Forcing Emulator (EVA_H): Comparison With Interactive Stratospheric Aerosol Models".Journal of Geophysical Research: Atmospheres 125.3(2020).