气候变化领域集成服务门户(CCPortal): Dynamical perturbation of the stratosphere by a pyrocumulonimbus injection of carbonaceous aerosols

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DOI	10.5194/acp-22-11049-2022
	Dynamical perturbation of the stratosphere by a pyrocumulonimbus injection of carbonaceous aerosols
	Doglioni, Giorgio; Aquila, Valentina; Das, Sampa; Colarco, Peter R.; Zardi, Dino
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	11049
结束页码	11064
卷号	22 期号:17 页码:16
英文摘要	The Pacific Northwest Pyrocumulonimbus Event (PNE) took place in British Columbia during the evening and nighttime hours between 12 and 13 August 2017. Several pyroconvective clouds erupted on this occasion, and released in the upper troposphere and lower stratosphere unprecedented amounts of carbonaceous aerosols (300 ktn). Only a few years later, an even larger pyrocumulonimbus (pyroCb) injection took place over Australia. This event, named the Australian New Year (ANY) event, injected up to 1100 ktn of aerosol between 29 December 2019 and 4 January 2020. Such large injections of carbonaceous aerosol modify the stratospheric radiative budgets, locally perturbing stratospheric temperatures and winds. In this study, we use the Goddard Earth Observing System Chemistry Climate Model (GEOS CCM) to study the perturbations on the stratospheric meteorology induced by an aerosol injection of the magnitude of the PNE. Our simulations include the radiative interactions of aerosols, so that their impact on temperatures and winds are explicitly simulated. We show how the presence of the carbonaceous aerosols from the pyroCb causes the formation and maintenance of a synoptic-scale stratospheric anticyclone. We follow this disturbance considering the potential vorticity anomaly and the brown carbon aerosol loading and we describe its dynamical and thermodynamical structure and its evolution in time. The analysis presented here shows that the simulated anticyclone undergoes daily expansion-compression cycles governed by the radiative heating, which are directly related to the vertical motion of the plume, and that the aerosol radiative heating is essential in maintaining the anticyclone itself.
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:000847672000001
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/273462
作者单位	University of Trento; University of Trento; American University; University System of Maryland; University of Maryland College Park; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center
推荐引用方式 GB/T 7714	Doglioni, Giorgio,Aquila, Valentina,Das, Sampa,et al. Dynamical perturbation of the stratosphere by a pyrocumulonimbus injection of carbonaceous aerosols[J],2022,22(17):16.
APA	Doglioni, Giorgio,Aquila, Valentina,Das, Sampa,Colarco, Peter R.,&Zardi, Dino.(2022).Dynamical perturbation of the stratosphere by a pyrocumulonimbus injection of carbonaceous aerosols.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(17),16.
MLA	Doglioni, Giorgio,et al."Dynamical perturbation of the stratosphere by a pyrocumulonimbus injection of carbonaceous aerosols".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.17(2022):16.