气候变化领域集成服务门户(CCPortal): Impact of the eruption of Mt Pinatubo on the chemical composition of the stratosphere

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DOI	10.5194/acp-20-11697-2020
	Impact of the eruption of Mt Pinatubo on the chemical composition of the stratosphere
	Kilian M.; Brinkop S.; Jöckel P.
发表日期	2020
ISSN	1680-7316
起始页码	11697
结束页码	11715
卷号	20 期号:20
英文摘要	This article describes the volcanic effect of the Mt Pinatubo eruption in June 1991 on the ozone (O3) and methane (CH4) distribution in the stratosphere, as simulated with the chemistry-climate model EMAC (ECHAM/MESSy Atmospheric Chemistry: ECHAM5, version 5.3.02; MESSy, version 2.51). In this study, the effects of volcanic heating and heterogeneous chemistry on the chemical composition, caused by the volcanic aerosol, are separated. Global model simulations over the relevant period of the eruption from 1989 to 1997 with EMAC in T42L90MA resolution with specified dynamics and interactive chemistry were performed. The first simulation (VOL) contains the volcanic perturbation as an additional aerosol load and thus simulates the interaction of the aerosol with the chemistry and the radiation. The second simulation (NOVOL) neglects the eruption and represents the undisturbed atmosphere. In the third simulation (CVOL) the volcanic aerosol only interacts with the heterogeneous chemistry, such that volcanic heating is omitted. The differences between the simulation results VOL-NOVOL describe the total effect of the Mt Pinatubo eruption on the chemical composition, VOL-CVOL the stratospheric heating effect, and CVOL-NOVOL the chemical effect of the aerosol on the heterogeneous chemistry. The post-volcanic stratosphere shows a decrease in the O3 column in the tropics and an increase in the midlatitudes and polar regions, lasting roughly 1 year. This change in the ozone column is solely a result of the heating effect. The subsequent decrease in the ozone column is related to the chemical effect. The contribution of the catalytic loss cycles (NOx , HOx , ClOx , and BrOx ) on the depletion of O3 is analysed in detail. In the tropics, CH4 increases in the upper stratosphere because of stronger vertical transport. © 2020 EDP Sciences. All rights reserved.
语种	英语
scopus关键词	aerosol; atmospheric chemistry; chemical composition; climate modeling; methane; ozone; stratosphere; volcanic eruption; Central Luzon; Luzon; Mount Pinatubo; Philippines; Zambales
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/247474
作者单位	Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
推荐引用方式 GB/T 7714	Kilian M.,Brinkop S.,Jöckel P.. Impact of the eruption of Mt Pinatubo on the chemical composition of the stratosphere[J],2020,20(20).
APA	Kilian M.,Brinkop S.,&Jöckel P..(2020).Impact of the eruption of Mt Pinatubo on the chemical composition of the stratosphere.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(20).
MLA	Kilian M.,et al."Impact of the eruption of Mt Pinatubo on the chemical composition of the stratosphere".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.20(2020).