气候变化领域集成服务门户(CCPortal): Lidar observations of pyrocumulonimbus smoke plumes in the UTLS over Tomsk (Western Siberia; Russia) from 2000 to 2017

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DOI	10.5194/acp-19-3341-2019
	Lidar observations of pyrocumulonimbus smoke plumes in the UTLS over Tomsk (Western Siberia; Russia) from 2000 to 2017
	Zuev V.V.; Gerasimov V.V.; Nevzorov A.V.; Savelieva E.S.
发表日期	2019
ISSN	16807316
起始页码	3341
结束页码	3356
卷号	19 期号:5
英文摘要	Large volcanic eruptions with the volcanic explosivity index (VEI) ≥ 3 are widely known to be the strongest source of long-lived aerosol in the upper troposphere and lower stratosphere (UTLS). However, the latest studies have revealed that massive forest (bush) fires represent another strong source of short-term (but intense) aerosol perturbations in the UTLS if combustion products from the fires reach these altitudes via convective ascent within pyrocumulonimbus clouds (pyroCbs). PyroCbs, generated by boreal wildfires in North America and northeastern Asia and injecting smoke plumes into the UTLS, have been intensively studied using both ground- and space-based instruments since the beginning of the 21st century. In this paper, we focus on aerosol layers observed in the UTLS over Tomsk (56.48° N, 85.05° E, Western Siberia, Russia) that could be smoke plumes from such pyroCb events occurring in the 2000-2017 period. Using the HYSPLIT trajectory analysis, we have reliably assigned nine aerosol layers to 8 out of more than 100 documented pyroCb events, the aftereffects of which could potentially be detected in the UTLS over Tomsk. All the eight pyroCb events occurred in the USA and Canada: one event per year occurred in 2000, 2002, 2003, 2013, 2015, and 2016, whereas two events occurred in 2017. No plumes from pyroCbs originating in the boreal zone of Siberia and the Far East (to the east of Tomsk) were observed in the UTLS over Tomsk between 2000 and 2017. We conclude that the time durations for pyroCb plumes to be detected in the UTLS using ground-based lidars are less than about a month, i.e., plumes from pyroCbs generated by wildfires to the east of Tomsk can significantly diffuse before reaching the Tomsk lidar station by the westerly zonal transport of air masses. A comparative analysis of the contributions from pyroCb events and volcanic eruptions with VEI ≥ 3 to aerosol loading of the UTLS over Tomsk showed the following. Plumes from two or more pyroCbs that have occurred in North America in a single year are able to markedly increase the aerosol loading compared to the previous year. The annual average value of the integrated aerosol backscatter coefficient Baπ, 532 increased by 14.8% in 2017 compared to that in 2016 due to multiple pyroCbs occurring in British Columbia (Canada) in August 2017. The aftereffects of pyroCb events are comparable to those of volcanic eruptions with VEI ≤ 3, but even multiple pyroCbs can hardly compete with volcanic eruptions with VEI = 4. © 2019 Author(s).
语种	英语
scopus关键词	aerosol; air mass; atmospheric plume; cumulonimbus; lidar; smoke; volcanic eruption; wildfire; British Columbia; Canada; Far East; Russian Federation; Siberia; Tomsk [Russian Federation]; United States
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/144570
作者单位	Institute of Monitoring of Climatic and Ecological Systems, SB RAS, Tomsk, 634055, Russian Federation; Faculty of Physics, Tomsk State University, Tomsk, 634050, Russian Federation; V. E. Zuev Institute of Atmospheric Optics, SB RAS, Tomsk, 634055, Russian Federation
推荐引用方式 GB/T 7714	Zuev V.V.,Gerasimov V.V.,Nevzorov A.V.,et al. Lidar observations of pyrocumulonimbus smoke plumes in the UTLS over Tomsk (Western Siberia; Russia) from 2000 to 2017[J],2019,19(5).
APA	Zuev V.V.,Gerasimov V.V.,Nevzorov A.V.,&Savelieva E.S..(2019).Lidar observations of pyrocumulonimbus smoke plumes in the UTLS over Tomsk (Western Siberia; Russia) from 2000 to 2017.Atmospheric Chemistry and Physics,19(5).
MLA	Zuev V.V.,et al."Lidar observations of pyrocumulonimbus smoke plumes in the UTLS over Tomsk (Western Siberia; Russia) from 2000 to 2017".Atmospheric Chemistry and Physics 19.5(2019).