气候变化领域集成服务门户(CCPortal): Modeling study of the impact of SO2 volcanic passive emissions on the tropospheric sulfur budget

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DOI	10.5194/acp-21-11379-2021
	Modeling study of the impact of SO2 volcanic passive emissions on the tropospheric sulfur budget
	Lamotte C.; Guth J.; Marécal V.; Cussac M.; Hamer P.D.; Theys N.; Schneider P.
发表日期	2021
ISSN	1680-7316
起始页码	11379
结束页码	11404
卷号	21 期号:14
英文摘要	Well constrained volcanic emissions inventories in chemistry transport models are necessary to study the impacts induced by these sources on the tropospheric sulfur composition and on sulfur species concentrations and depositions at the surface. In this paper, the changes induced by the update of the volcanic sulfur emissions inventory are studied using the global chemistry transport model MOCAGE (MOdèle de Chimie Atmosphérique à Grande Échelle). Unlike the previous inventory , the updated one uses more accurate information and includes contributions from both passive degassing and eruptive emissions. Eruptions are provided as daily total amounts of sulfur dioxide (SO2) emitted by volcanoes in the inventories, and degassing emissions are provided as annual averages with the related mean annual uncertainties of those emissions by volcano. Information on plume altitudes is also available and has been used in the model. We chose to analyze the year 2013, for which only a negligible amount of eruptive volcanic SO2 emissions is reported, allowing us to focus the study on the impact of passive degassing emissions on the tropospheric sulfur budget. An evaluation against the Ozone Monitoring Instrument (OMI) SO2 total column and MODIS (Moderate-Resolution Imaging Spectroradiometer) aerosol optical depth (AOD) observations shows the improvements of the model results with the updated inventory. Because the global volcanic SO2 flux changes from 13ĝ€¯Tgyr-1 in to 23.6ĝ€¯Tgyr-1 in , significant differences appear in the global sulfur budget, mainly in the free troposphere and in the tropics. Even though volcanic SO2 emissions represent 15ĝ€¯% of the total annual sulfur emissions, the volcanic contribution to the tropospheric sulfate aerosol burden is 25ĝ€¯%, which is due to the higher altitude of emissions from volcanoes. Moreover, a sensitivity study on passive degassing emissions, using the annual uncertainties of emissions per volcano, also confirmed the nonlinear link between tropospheric sulfur species content with respect to volcanic SO2 emissions. This study highlights the need for accurate estimates of volcanic sources in chemistry transport models in order to properly simulate tropospheric sulfur species. © Copyright:
语种	英语
scopus关键词	accuracy assessment; aerosol; atmospheric chemistry; chemical composition; concentration (composition); emission inventory; modeling; MODIS; sulfate; sulfur; sulfur dioxide; troposphere; uncertainty analysis; volcanic gas
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/246698
作者单位	CNRM, Université de Toulouse, Météo-France, CNRS, Toulouse, France; NILU - Norwegian Institute for Air Research, P.O. Box 100, Kjeller, 2027, Norway; Royal Belgian Institute for Space Aeronomy, BIRA-IASB, Brussels, Belgium
推荐引用方式 GB/T 7714	Lamotte C.,Guth J.,Marécal V.,et al. Modeling study of the impact of SO2 volcanic passive emissions on the tropospheric sulfur budget[J],2021,21(14).
APA	Lamotte C..,Guth J..,Marécal V..,Cussac M..,Hamer P.D..,...&Schneider P..(2021).Modeling study of the impact of SO2 volcanic passive emissions on the tropospheric sulfur budget.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(14).
MLA	Lamotte C.,et al."Modeling study of the impact of SO2 volcanic passive emissions on the tropospheric sulfur budget".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.14(2021).