Spatial and seasonal variations of isoprene secondary organic aerosol in China: Significant impact of biomass burning during winter

Ding, Xiang; He, Quanfu; Shen, Ruinan; Yu, Qingqing; Zhang, Yuqing; Xin, Jinyuan; Wen, Tian; Wang, Xinming

doi:10.1038/srep20411

Cited by 60 publications

(54 citation statements)

References 55 publications

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“…Our ground‐based observation during summer in the six regions of China illustrated that isoprene was the major precursor of BSOA [ Ding et al , ]. The annual average SOC from isoprene (SOC I ) ranged from 0.03 to 0.63 μgC m −3 over China, and SOC I levels increased in summertime and significantly decreased during fall to spring [ Ding et al , ]. At present, nationwide observation of BSOA from monoterpenes and sesquiterpenes is rare in China.…”

Section: Introductionmentioning

confidence: 99%

Spatial and seasonal variations of secondary organic aerosol from terpenoids over China

Ding

Zhang

et al. 2016

JGR Atmospheres

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A majority of global secondary organic aerosol (SOA) comes from terpenoids. In this study, we carried out a 1 year nationwide observation of pinenes (α‐ and β‐pinene) and SOA tracers from monoterpenes (SOAM) and β‐caryophyllene (SOAC) over China for the first time. SOAM and SOAC tracers ranged from 9.80 to 49.0 ng m−3 and 1.72 to 7.72 ng m−3, respectively, with high levels in southern China. Pinenes ranged from 34 to 102 parts per trillion by volume, with α‐pinene dominant over β‐pinene. SOAM tracers were correlated between paired sites, suggesting a regional impact of SOAM, while pinenes were uncorrelated between sites due to their rapid oxidation. High levels of SOAM tracers were observed in spring and summer. However, at the Hailun site in Northeast China, SOAM tracers increased during winter. The positive correlation between SOAM tracers and the biomass burning (BB) tracer levoglucosan during winter at Hailun indicated that the unexpected increase of SOAM was associated with BB. The SOAC tracer, β‐caryophyllenic acid, increased during winter and was positively correlated with levoglucosan, suggesting substantial contributions from BB to SOAC production in wintertime. Together with SOA tracers from isoprene, these tracers were applied to estimate biogenic secondary organic carbon (BSOC) from isoprene, monoterpenes, and β‐caryophyllene. The annual average BSOC was 0.91 ± 0.41 μgC m−3,with the majority from monoterpenes and the highest level in Southwest China. BSOC was elevated from April to September and was lowest in January and February. BSOC composition dramatically changed from a monoterpene majority in fall‐spring to an isoprene majority in summer.

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Section: Introductionmentioning

confidence: 99%

Spatial and seasonal variations of secondary organic aerosol from terpenoids over China

Ding

Zhang

et al. 2016

JGR Atmospheres

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“…Great attention has been drawn to SOA formation and transformation in biomass burning plumes recently, since a significant increase in mass and apparent change in physicochemical characteristics of aerosols have been observed during atmospheric aging of biomass burning plumes in both field and laboratory studies (Grieshop et al, 2009a, b;Hennigan et al, 2011;Heringa et al, 2011;Lambe et al, 2011;Jolleys et al, 2012;Giordano et al, 2013;Martin et al, 2013;Ortega et al, 2013;Ding et al, 2016aDing et al, , b, 2017. For agricultural residue burning, evolution processes have not been well characterized yet.…”

Section: Z Fang Et Al: Open Burning Of Rice Corn and Wheat Strawsmentioning

confidence: 99%

Open burning of rice, corn and wheat straws: primary emissions, photochemical aging, and secondary organic aerosol formation

et al. 2017

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Abstract. Agricultural residues are among the most abundant biomass burned globally, especially in China. However, there is little information on primary emissions and photochemical evolution of agricultural residue burning. In this study, indoor chamber experiments were conducted to investigate primary emissions from open burning of rice, corn and wheat straws and their photochemical aging as well. Emission factors of NO x , NH 3 , SO 2 , 67 non-methane hydrocarbons (NMHCs), particulate matter (PM), organic aerosol (OA) and black carbon (BC) under ambient dilution conditions were determined. Olefins accounted for > 50 % of the total speciated NMHCs emission (2.47 to 5.04 g kg −1 ), indicating high ozone formation potential of straw burning emissions. Emission factors of PM (3.73 to 6.36 g kg −1 ) and primary organic carbon (POC, 2.05 to 4.11 gC kg −1 ), measured at dilution ratios of 1300 to 4000, were lower than those reported in previous studies at low dilution ratios, probably due to the evaporation of semi-volatile organic compounds under high dilution conditions. After photochemical aging with an OH exposure range of (1.97-4.97) × 10 10 molecule cm −3 s in the chamber, large amounts of secondary organic aerosol (SOA) were produced with OA mass enhancement ratios (the mass ratio of total OA to primary OA) of 2.4-7.6. The 20 known precursors could only explain 5.0-27.3 % of the observed SOA mass, suggesting that the major precursors of SOA formed from open straw burning remain unidentified. Aerosol mass spectrometry (AMS) signaled that the aged OA contained less hydrocarbons but more oxygen-and nitrogencontaining compounds than primary OA, and carbon oxidation state (OS c ) calculated with AMS resolved O / C and H / C ratios increased linearly (p < 0.001) with OH exposure with quite similar slopes.

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“…Their seasonal variation was in agreement with the ambient temperature (Fig S1a), which can influence the isoprene emissions and the photochemical processes (Shen et al, 2015;Wang et al, 2008). The annual average concentration was higher than the 400 urban sites reported from Beijing (44.3 ng m -3 ) and Kunming (108 ng m -3 ) (Ding et al, 2016a), even one to two orders of magnitude higher than that from global oceans and the Arctic (Hu et al, 2013). Among I-SOA tracers, 2-MTLs were the major components (51.0%±10.5%) (Fig.…”

Section: The Measurements Of Gaseous Vocs In Winter (December 2012 Tomentioning

confidence: 98%

“…This method has been applied successfully in many aerosol studies (Fu et al, 2010;Shen et al, 2015;Ding et al, 2016a). The mass fraction of tracer compounds in SOC (FSOC) for an individual precursor was calculate based on the smog chamber simulations.…”

Section: Biogenic Soc and Anthropogenic Toluene Socmentioning

confidence: 99%

“…Sources and chemical transformations of OC are complicated, including primary emissions (biomass and fossil fuel combustion, plant debris and soil dust) and secondary formation of the oxidative products of precursor gases emitted from both biogenic and anthropogenic sources (Simoneit et al,80 2004; Claeys et al, 2004;Ding et al, 2016a). While past studies of aerosol characteristics in the Kathmandu Valley and surrounding regions are limited, they demonstrated that OC was the main component of aerosols observed in the Kathmandu Valley (Shakya et al, 2017;Kim et al, 2015).…”

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Molecular characterization of organic aerosols in the Kathmandu Valley, Nepal: insights into primary and secondary sources

Wan¹,

Kang²,

Rupakheti³

et al. 2018

Preprint

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Abstract:Organic atmospheric aerosols in the Hindu Kush-Himalayan-Tibetan Plateau region are still poorly characterized. To better understand the sources and formation processes of the primary organic aerosols (POA) and secondary organic aerosol (SOA) in the foothills region of the central Himalaya, we studied atmospheric aerosol samples collected over a one-year period from April 2013 to April 2014 at the Atmos. Chem. Phys. Discuss., https://doi

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Spatial and seasonal variations of isoprene secondary organic aerosol in China: Significant impact of biomass burning during winter

Cited by 60 publications

References 55 publications

Spatial and seasonal variations of secondary organic aerosol from terpenoids over China

Spatial and seasonal variations of secondary organic aerosol from terpenoids over China

Open burning of rice, corn and wheat straws: primary emissions, photochemical aging, and secondary organic aerosol formation

Molecular characterization of organic aerosols in the Kathmandu Valley, Nepal: insights into primary and secondary sources

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