气候变化领域集成服务门户(CCPortal): Smoke-charged vortices in the stratosphere generated by wildfires and their behaviour in both hemispheres: Comparing Australia 2020 to Canada 2017

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DOI	10.5194/acp-21-7113-2021
	Smoke-charged vortices in the stratosphere generated by wildfires and their behaviour in both hemispheres: Comparing Australia 2020 to Canada 2017
	Lestrelin H.; Legras B.; Podglajen A.; Salihoglu M.
发表日期	2021
ISSN	1680-7316
起始页码	7113
结束页码	7134
卷号	21 期号:9
英文摘要	The two most intense wildfires of the last decade that took place in Canada in 2017 and Australia in 2019-2020 were followed by large injections of smoke into the stratosphere due to pyro-convection. After the Australian event, Khaykin et al. (2020) and Kablick et al. (2020) discovered that part of this smoke self-organized as anticyclonic confined vortices that rose in the mid-latitude stratosphere up to 35 km. Based on Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) observations and the ERA5 reanalysis, this new study analyses the Canadian case and finds, similarly, that a large plume had penetrated the stratosphere by 12-13 August 2017 and then became trapped within a mesoscale anticyclonic structure that travelled across the Atlantic. It then broke into three offspring that could be followed until mid-October, performing three round-the-world journeys and rising up to 23 km. We analyse the dynamical structure of the vortices produced by these two wildfires and demonstrate how the assimilation of the real temperature and ozone data from instruments measuring the signature of the vortices explains the appearance and maintenance of the vortices in the constructed dynamical fields. We propose that these vortices can be seen as bubbles of small, almost vanishing, potential vorticity and smoke carried vertically across the stratification from the troposphere inside the middle stratosphere by their internal heating, against the descending flux of the Brewer-Dobson circulation. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol composition; aerosol formation; atmospheric convection; biomass burning; CALIOP; satellite data; satellite imagery; stratosphere; wildfire; Australia; Canada
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/246903
作者单位	Laboratoire de Météorologie Dynamique, UMR CNRS 8539, IPSL, PSL-ENS/École Polytechnique/Sorbonne Université, Paris, France
推荐引用方式 GB/T 7714	Lestrelin H.,Legras B.,Podglajen A.,et al. Smoke-charged vortices in the stratosphere generated by wildfires and their behaviour in both hemispheres: Comparing Australia 2020 to Canada 2017[J],2021,21(9).
APA	Lestrelin H.,Legras B.,Podglajen A.,&Salihoglu M..(2021).Smoke-charged vortices in the stratosphere generated by wildfires and their behaviour in both hemispheres: Comparing Australia 2020 to Canada 2017.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(9).
MLA	Lestrelin H.,et al."Smoke-charged vortices in the stratosphere generated by wildfires and their behaviour in both hemispheres: Comparing Australia 2020 to Canada 2017".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.9(2021).