气候变化领域集成服务门户(CCPortal): Differing responses of the quasi-biennial oscillation to artificial SO2 injections in two global models

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DOI	10.5194/acp-20-8975-2020
	Differing responses of the quasi-biennial oscillation to artificial SO2 injections in two global models
	Niemeier U.; H. Richter J.; Tilmes S.
发表日期	2020
ISSN	1680-7316
起始页码	8975
结束页码	8987
卷号	20 期号:14
英文摘要	Artificial injections of sulfur dioxide (span classCombining double low line"inline-formula"SO2/span ) into the stratosphere show in several model studies an impact on stratospheric dynamics. The quasi-biennial oscillation (QBO) has been shown to slow down or even vanish under higher span classCombining double low line"inline-formula"SO2/span injections in the equatorial region. But the impact is only qualitatively but not quantitatively consistent across the different studies using different numerical models. The aim of this study is to understand the reasons behind the differences in the QBO response to span classCombining double low line"inline-formula"SO2/span injections between two general circulation models, the Whole Atmosphere Community Climate Model (WACCM-110L) and MAECHAM5-HAM. We show that the response of the QBO to injections with the same span classCombining double low line"inline-formula"SO2/span injection rate is very different in the two models, but similar when a similar stratospheric heating rate is induced by span classCombining double low line"inline-formula"SO2/span injections of different amounts. The reason for the different response of the QBO corresponding to the same injection rate is very different vertical advection in the two models, even in the control simulation. The stronger vertical advection in WACCM results in a higher aerosol burden and stronger heating of the aerosols and, consequently, in a vanishing QBO at lower injection rate than in simulations with MAECHAM5-HAM. The vertical velocity increases slightly in MAECHAM5-HAM when increasing the horizontal resolution. This study highlights the crucial role of dynamical processes and helps to understand the large uncertainties in the response of different models to artificial span classCombining double low line"inline-formula"SO2/span injections in climate engineering studies. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	atmospheric chemistry; atmospheric dynamics; climate modeling; computer simulation; numerical model; quasi-biennial oscillation; stratosphere; sulfur dioxide; uncertainty analysis
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141187
作者单位	Max Planck Institute for Meteorology, Bundesstr. 53, Hamburg, 20146, Germany; National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Niemeier U.,H. Richter J.,Tilmes S.. Differing responses of the quasi-biennial oscillation to artificial SO2 injections in two global models[J],2020,20(14).
APA	Niemeier U.,H. Richter J.,&Tilmes S..(2020).Differing responses of the quasi-biennial oscillation to artificial SO2 injections in two global models.Atmospheric Chemistry and Physics,20(14).
MLA	Niemeier U.,et al."Differing responses of the quasi-biennial oscillation to artificial SO2 injections in two global models".Atmospheric Chemistry and Physics 20.14(2020).