气候变化领域集成服务门户(CCPortal): Summer PM2.5 Pollution Extremes Caused by Wildfires Over the Western United States During 2017

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DOI	10.1029/2020GL089429
	Summer PM2.5 Pollution Extremes Caused by Wildfires Over the Western United States During 2017–2018
	Xie Y.; Lin M.; Horowitz L.W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	Using observations and model simulations (ESM4.1) during 1988–2018, we show large year-to-year variability in western U.S. PM2.5 pollution caused by regional and distant fires. Widespread wildfires, combined with stagnation, caused summer PM2.5 pollution in 2017 and 2018 to exceed 2 standard deviations over long-term averages. ESM4.1 with a fire emission inventory constrained by satellite-derived fire radiative energy and aerosol optical depth captures the observed surface PM2.5 means and extremes above the 35 μg/m3 U.S. air quality standard. However, aerosol emissions from the widely used Global Fire Emissions Database (GFED) must be increased by 5 times for ESM4.1 to match observations. On days when observed PM2.5 reached 35–175 μg/m3, wildfire emissions can explain 90% of total PM2.5, with smoke transported from Canada contributing 25–50% in northern states, according to model sensitivity simulations. Fire emission uncertainties pose challenges to accurately assessing the impacts of fire smoke on air quality, radiation, and climate. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Aerosols; Air quality; Smoke; Uncertainty analysis; Aerosol emissions; Aerosol optical depths; Fire radiative energies; Model sensitivity; Model simulation; Pm2.5 pollutions; Standard deviation; Western United States; Fires; air quality; atmospheric pollution; emission inventory; extreme event; long-term change; optical depth; particulate matter; satellite altimetry; smoke; summer; wildfire; Canada; United States
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169936
作者单位	Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States; NOAA Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
推荐引用方式 GB/T 7714	Xie Y.,Lin M.,Horowitz L.W.. Summer PM2.5 Pollution Extremes Caused by Wildfires Over the Western United States During 2017–2018[J],2020,47(16).
APA	Xie Y.,Lin M.,&Horowitz L.W..(2020).Summer PM2.5 Pollution Extremes Caused by Wildfires Over the Western United States During 2017–2018.Geophysical Research Letters,47(16).
MLA	Xie Y.,et al."Summer PM2.5 Pollution Extremes Caused by Wildfires Over the Western United States During 2017–2018".Geophysical Research Letters 47.16(2020).