A New Volcanic Stratospheric Sulfate Aerosol Forcing Emulator (EVA_H): Comparison With Interactive Stratospheric Aerosol Models
A New Volcanic Stratospheric Sulfate Aerosol Forcing Emulator (EVA_H): Comparison With Interactive Stratospheric Aerosol Models
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新型火山平流层硫酸盐气溶胶强迫模拟器 (EVA_H):与交互式平流层气溶胶模型的比较
DOI:
10.1029/2019jd031303
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Aubry T
中科院分区:
文献类型:
--
作者:
Aubry T
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 ; (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 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.
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DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
W. Moreland
通讯作者:
W. Moreland
DOI:
10.1002/2014jd021985
发表时间:
2015
期刊:
Journal of Geophysical Research: Atmospheres
影响因子:
--
作者:
J. Sheng;D. Weisenstein;B. Luo;E. Rozanov;A. Stenke;J. Anet;H. Bingemer;T. Peter
通讯作者:
T. Peter
DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
C. Timmreck;Graham W. Mann;Valentina Aquila;Rene Hommel;Lindsay A. Lee;Anja Schmidt;Christoph Brühl;Simon Carn;M. Chin;S. Dhomse;T. Diehl;J. M. English;Michael J. Mills;R. Neely;Jianxiong Sheng;M. Toohey;Debra Weisenstein
通讯作者:
Debra Weisenstein
DOI:
10.1016/j.jvolgeores.2017.07.006
发表时间:
2017-09-01
影响因子:
2.9
作者:
Aubry, Thomas J.;Jellinek, A. Mark;Dunning, Jack
通讯作者:
Dunning, Jack
影响因子:
5.1
作者:
M. Toohey;B. Stevens;H. Schmidt;C. Timmreck
通讯作者:
M. Toohey;B. Stevens;H. Schmidt;C. Timmreck