气候变化领域集成服务门户(CCPortal): Detection of Aerosols in Antarctica From Long-Range Transport of the 2009 Australian Wildfires

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DOI	10.1029/2020JD032542
	Detection of Aerosols in Antarctica From Long-Range Transport of the 2009 Australian Wildfires
	Jumelet J.; Klekociuk A.R.; Alexander S.P.; Bekki S.; Hauchecorne A.; Vernier J.P.; Fromm M.; Keckhut P.
发表日期	2020
ISSN	2169897X
卷号	125 期号:23
英文摘要	We analyze the long-range transport to high latitudes of a smoke particle filament originating from the extratropics plume after the Australian wildfires colloquially known as “Black Saturday” on 7 February and report the first Antarctic stratospheric lidar characterization of such aerosols. Using a high-resolution transport/microphysical model, we show that the monitoring cloud/aerosol lidar instrument operating at the French Antarctic station Dumont d'Urville (DDU, 66°S to 140°E) recorded a signature of those aerosols. The 532 nm scattering ratio of this filament is comparable to typical moderate stratospheric volcanic plume, with values between 1.4 and 1.6 on the first and third days of March above DDU station at around the 14 and 16 km altitude, respectively. A dedicated model is described and its ability to track down fine optical signatures is validated against Antarctic lidar elastic aerosol and DIAL ozone measurements. Using 1 month of tropical Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) data to support a relatively simple microphysical scheme, we report modeled aerosol presence above DDU station after advection of the aerosol size distribution. In situ measurements also report associated positive ozone anomaly. This case study provides evidence that biomass burning events injecting significant amounts of material up to stratospheric altitudes can be transported toward high latitudes. We highlight a potential imprint of smoke particles on the Antarctic atmosphere over larger time scales. Any underestimation of the global impact of such deep particle transport will lead to uncertainties in modeling the associated chemical or radiative effects, especially in polar regions, where specific microphysical and chemical processes take place. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	aerosols; Antarctica; bushfires; lidar
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185601
作者单位	LATMOS CNRS/IPSL UPMC/UVSQ, Paris, France; Australian Antarctic Division, Kingston, TAS, Australia; NASA Langley Research Center, Hampton, VA, United States; Naval Research Laboratory, Washington, DC, United States
推荐引用方式 GB/T 7714	Jumelet J.,Klekociuk A.R.,Alexander S.P.,et al. Detection of Aerosols in Antarctica From Long-Range Transport of the 2009 Australian Wildfires[J],2020,125(23).
APA	Jumelet J..,Klekociuk A.R..,Alexander S.P..,Bekki S..,Hauchecorne A..,...&Keckhut P..(2020).Detection of Aerosols in Antarctica From Long-Range Transport of the 2009 Australian Wildfires.Journal of Geophysical Research: Atmospheres,125(23).
MLA	Jumelet J.,et al."Detection of Aerosols in Antarctica From Long-Range Transport of the 2009 Australian Wildfires".Journal of Geophysical Research: Atmospheres 125.23(2020).