气候变化领域集成服务门户(CCPortal): Reconstructing volcanic radiative forcing since 1990, using a comprehensive emission inventory and spatially resolved sulfur injections from satellite data in a chemistry-climate model

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DOI	10.5194/acp-23-1169-2023
	Reconstructing volcanic radiative forcing since 1990, using a comprehensive emission inventory and spatially resolved sulfur injections from satellite data in a chemistry-climate model
	Schallock, Jennifer; Bruehl, Christoph; Bingen, Christine; Hoepfner, Michael; Rieger, Landon; Lelieveld, Jos
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	1169
结束页码	1207
卷号	23 期号:2 页码:39
英文摘要	This paper presents model simulations of stratospheric aerosols with a focus on explosive volcanic eruptions. Using various (occultation and limb-based) satellite instruments, providing vertical profiles of sulfur dioxide (SO2) and aerosol extinction, we characterized the chemical and radiative influence of volcanic aerosols for the period between 1990 and 2019. We established an improved and extended volcanic SO2 emission inventory that includes more than 500 explosive volcanic eruptions reaching the upper troposphere and the stratosphere. Each perturbation identified was derived from the satellite data and incorporated as a three-dimensional SO2 plume into a chemistry-climate model without the need for additional assumptions about altitude distribution and eruption duration as needed for a point source approach. The simultaneous measurements of SO2 and aerosol extinction by up to four satellite instruments enabled a reliable conversion of extinction measurements into injected SO2. In the chemistry-climate model, the SO2 from each individual plume was converted into aerosol particles and their optical properties were determined. Furthermore, the aerosol optical depth (AOD) and the instantaneous radiative forcing on climate were calculated online. Combined with model improvements, the results of the simulations are consistent with the observations of the various satellites. Slight deviations between the observations and model simulations were found for the large volcanic eruption of Pinatubo in 1991 and cases where simultaneous satellite observations were not unique or too sparse. Weak- and medium-strength volcanic eruptions captured in satellite data and the Smithsonian database typically inject about 10 to 50 kt SO2 directly into the upper troposphere/lower stratosphere (UTLS) region or the sulfur species are transported via convection and advection. Our results confirm that these relatively minor eruptions, which occur quite frequently, can nevertheless contribute to the stratospheric aerosol layer and are relevant for the Earth's radiation budget. These minor eruptions cause a total global instantaneous radiative forcing of the order of -0.1 Wm(-2) at the top of the atmosphere (TOA) compared to a background stratospheric aerosol forcing of about -0.04 Wm(-2). Medium-strength eruptions injecting about 400 kt SO2 into the stratosphere or accumulation of consecutive smaller eruptions can lead to a total instantaneous forcing of about -0.3 Wm(-2). We show that it is critical to include the contribution of the extratropical lowermost stratospheric aerosol in the forcing calculations.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000921479500001
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/273761
作者单位	Max Planck Society; Helmholtz Association; Karlsruhe Institute of Technology; University of Saskatchewan
推荐引用方式 GB/T 7714	Schallock, Jennifer,Bruehl, Christoph,Bingen, Christine,et al. Reconstructing volcanic radiative forcing since 1990, using a comprehensive emission inventory and spatially resolved sulfur injections from satellite data in a chemistry-climate model[J],2023,23(2):39.
APA	Schallock, Jennifer,Bruehl, Christoph,Bingen, Christine,Hoepfner, Michael,Rieger, Landon,&Lelieveld, Jos.(2023).Reconstructing volcanic radiative forcing since 1990, using a comprehensive emission inventory and spatially resolved sulfur injections from satellite data in a chemistry-climate model.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(2),39.
MLA	Schallock, Jennifer,et al."Reconstructing volcanic radiative forcing since 1990, using a comprehensive emission inventory and spatially resolved sulfur injections from satellite data in a chemistry-climate model".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.2(2023):39.