气候变化领域集成服务门户(CCPortal): Towards a satellite formaldehyde - In situ hybrid estimate for organic aerosol abundance

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DOI	10.5194/acp-19-2765-2019
	Towards a satellite formaldehyde - In situ hybrid estimate for organic aerosol abundance
	Liao J.; Hanisco T.F.; Wolfe G.M.; Clair J.S.; Jimenez J.L.; Campuzano-Jost P.; Nault B.A.; Fried A.; Marais E.A.; Gonzalez Abad G.; Chance K.; Jethva H.T.; Ryerson T.B.; Warneke C.; Wisthaler A.
发表日期	2019
ISSN	16807316
起始页码	2765
结束页码	2785
卷号	19 期号:5
英文摘要	Organic aerosol (OA) is one of the main components of the global particulate burden and intimately links natural and anthropogenic emissions with air quality and climate. It is challenging to accurately represent OA in global models. Direct quantification of global OA abundance is not possible with current remote sensing technology; however, it may be possible to exploit correlations of OA with remotely observable quantities to infer OA spatiotemporal distributions. In particular, formaldehyde (HCHO) and OA share common sources via both primary emissions and secondary production from oxidation of volatile organic compounds (VOCs). Here, we examine OA-HCHO correlations using data from summertime airborne campaigns investigating biogenic (NASA SEAC4RS and DC3), biomass burning (NASA SEAC4RS), and anthropogenic conditions (NOAA CalNex and NASA KORUS-AQ). In situ OA correlates well with HCHO (r = 0:59-0.97), and the slope and intercept of this relationship depend on the chemical regime. For biogenic and anthropogenic regions, the OA-HCHO slopes are higher in low NOx conditions, because HCHO yields are lower and aerosol yields are likely higher. The OA-HCHO slope of wildfires is over 9 times higher than that for biogenic and anthropogenic sources. The OA-HCHO slope is higher for highly polluted anthropogenic sources (e.g., KORUSAQ) than less polluted (e.g., CalNex) anthropogenic sources. Near-surface OAs over the continental US are estimated by combining the observed in situ relationships with HCHO column retrievals from NASA's Ozone Monitoring Instrument (OMI). HCHO vertical profiles used in OA estimates are from climatology a priori profiles in the OMI HCHO retrieval or output of specific period from a newer version of GEOS-Chem. Our OA estimates compare well with US EPA IMPROVE data obtained over summer months (e.g., slope = 0:60-0.62, r = 0:56 for August 2013), with correlation performance comparable to intensively validated GEOS-Chem (e.g., slope = 0:57, r = 0:56) with IMPROVE OA and superior to the satellite-derived total aerosol extinction (r = 0:41) with IMPROVE OA. This indicates that OA estimates are not very sensitive to these HCHO vertical profiles and that a priori profiles from OMI HCHO retrieval have a similar per-formance to that of the newer model version in estimating OA. Improving the detection limit of satellite HCHO and expanding in situ airborne HCHO and OA coverage in future missions will improve the quality and spatiotemporal coverage of our OA estimates, potentially enabling constraints on global OA distribution. © Author(s) 2019.
语种	英语
scopus关键词	aerosol; anthropogenic source; formaldehyde; oxidation; spatial distribution; temporal distribution; volatile organic compound; 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/144600
作者单位	Atmospheric Chemistry and Dynamic Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Universities Space Research Association, GESTAR, Columbia, MD, United States; University of Maryland Baltimore County, Joint Center for Earth Systems Technology, Baltimore, MD, United States; Department of Chemistry, University of Colorado, Boulder, CO, United States; Cooperative Institute for Research in the Environmental Sciences, University of Colorado, Boulder, CO, United States; Department of Atmospheric and Oceanic Sciences, University of Colorado Boulder, Boulder, CO, United States; School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States; NOAA Earth System Research Laboratory, Chemical Sciences Division, Boulder, CO, United States; Department of Chemistry, University of Oslo, Oslo, Norway; Institute for Ion Physics and Applied Physics, University of Innsbruck, Innsb...
推荐引用方式 GB/T 7714	Liao J.,Hanisco T.F.,Wolfe G.M.,et al. Towards a satellite formaldehyde - In situ hybrid estimate for organic aerosol abundance[J],2019,19(5).
APA	Liao J..,Hanisco T.F..,Wolfe G.M..,Clair J.S..,Jimenez J.L..,...&Wisthaler A..(2019).Towards a satellite formaldehyde - In situ hybrid estimate for organic aerosol abundance.Atmospheric Chemistry and Physics,19(5).
MLA	Liao J.,et al."Towards a satellite formaldehyde - In situ hybrid estimate for organic aerosol abundance".Atmospheric Chemistry and Physics 19.5(2019).