气候变化领域集成服务门户(CCPortal): Sources and atmospheric dynamics of organic aerosol in New Delhi, India: Insights from receptor modeling

CCPortal

DOI	10.5194/acp-20-735-2020
	Sources and atmospheric dynamics of organic aerosol in New Delhi, India: Insights from receptor modeling
	Bhandari S.; Gani S.; Patel K.; Wang D.S.; Soni P.; Arub Z.; Habib G.; Apte J.S.; Hildebrandt Ruiz L.
发表日期	2020
ISSN	16807316
起始页码	735
结束页码	752
卷号	20 期号:2
英文摘要	Delhi, India, is the second most populated city in the world and routinely experiences some of the highest particulate matter concentrations of any megacity on the planet, posing acute challenges to public health (World Health Organization, 2018). However, the current understanding of the sources and dynamics of PM pollution in Delhi is limited. Measurements at the Delhi Aerosol Supersite (DAS) provide long-term chemical characterization of ambient submicron aerosol in Delhi, with near-continuous online measurements of aerosol composition. Here we report on source apportionment based on positive matrix factorization (PMF), conducted on 15 months of highly timeresolved speciated submicron non-refractory PM1 (NR-PM1) between January 2017 and March 2018. We report on seasonal variability across four seasons of 2017 and interannual variability using data from the two winters and springs of 2017 and 2018. We show that a modified tracer-based organic component analysis provides an opportunity for a realtime source apportionment approach for organics in Delhi. Phase equilibrium modeling of aerosols using the extended aerosol inorganics model (E-AIM) predicts equilibrium gasphase concentrations and allows evaluation of the importance of the ventilation coefficient (VC) and temperature in controlling primary and secondary organic aerosol. We also find that primary aerosol dominates severe air pollution episodes, and secondary aerosol dominates seasonal averages. © Author(s) 2020.
语种	英语
scopus关键词	aerosol; annual variation; atmospheric dynamics; atmospheric pollution; concentration (composition); matrix; megacity; modeling; particulate matter; pollutant source; seasonal variation; source apportionment; urban atmosphere; Delhi; India; New Delhi
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/152945
作者单位	McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, TX, United States; Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, Austin, TX, United States; Department of Civil Engineering, Indian Institute of Technology Delhi, New Delhi, India
推荐引用方式 GB/T 7714	Bhandari S.,Gani S.,Patel K.,et al. Sources and atmospheric dynamics of organic aerosol in New Delhi, India: Insights from receptor modeling[J],2020,20(2).
APA	Bhandari S..,Gani S..,Patel K..,Wang D.S..,Soni P..,...&Hildebrandt Ruiz L..(2020).Sources and atmospheric dynamics of organic aerosol in New Delhi, India: Insights from receptor modeling.Atmospheric Chemistry and Physics,20(2).
MLA	Bhandari S.,et al."Sources and atmospheric dynamics of organic aerosol in New Delhi, India: Insights from receptor modeling".Atmospheric Chemistry and Physics 20.2(2020).