气候变化领域集成服务门户(CCPortal): NH3 spatiotemporal variability over Paris, Mexico City, and Toronto, and its link to PM2.5 during pollution events

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DOI	10.5194/acp-22-12907-2022
	NH3 spatiotemporal variability over Paris, Mexico City, and Toronto, and its link to PM2.5 during pollution events
	Viatte, Camille; Abeed, Rimal; Yamanouchi, Shoma; Porter, William C.; Safieddine, Sarah; Van Damme, Martin; Clarisse, Lieven; Herrera, Beatriz; Grutter, Michel; Coheur, Pierre-Francois; Strong, Kimberly; Clerbaux, Cathy
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	12907
结束页码	12922
卷号	22 期号:19 页码:16
英文摘要	Megacities can experience high levels of fine particulate matter (PM2.5) pollution linked to ammonia (NH3) mainly emitted from agricultural activities. Here, we investigate such pollution in the cities of Paris, Mexico, and Toronto, each of which have distinct emission sources, agricultural regulations, and topography. Ten years of measurements from the infrared atmospheric sounding interferometer (IASI) are used to assess the spatiotemporal NH3 variability over and around the three cities. In Europe and North America, we determine that temperature is associated with the increase in NH3 atmospheric concentrations with a coefficient of determination (r(2)) of 0.8 over agricultural areas. The variety of the NH3 sources (industry and agricultural) and the weaker temperature seasonal cycle in southern North America induce a lower correlation factor (r(2)=0.5). The three regions are subject to long-range transport of NH3, as shown using HYSPLIT cluster back trajectories. The highest NH3 concentrations measured at the city scale are associated with air masses coming from the surrounding and north/northeast regions of Paris, the south/southwest areas of Toronto, and the southeast/southwest zones of Mexico City. Using NH3 and PM2.5 measurements derived from IASI and surface observations from 2008 to 2017, annually frequent pollution events are identified in the three cities. Wind roses reveal statistical patterns during these pollution events with dominant northeast/southwest directions in Paris and Mexico City, and the transboundary transport of pollutants from the United States in Toronto. To check how well chemistry transport models perform during pollution events, we evaluate simulations made using the GEOS-Chem model for March 2011. In these simulations we find that NH3 concentrations are underestimated overall, though day-to-day variability is well represented. PM2.5 is generally underestimated over Paris and Mexico City, but overestimated over Toronto.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000864747200001
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/273485
作者单位	Centre National de la Recherche Scientifique (CNRS); UDICE-French Research Universities; Sorbonne Universite; Universite Paris Saclay; University of Toronto; University of Toronto; University of California System; University of California Riverside; Universite Libre de Bruxelles; Universidad Nacional Autonoma de Mexico
推荐引用方式 GB/T 7714	Viatte, Camille,Abeed, Rimal,Yamanouchi, Shoma,et al. NH3 spatiotemporal variability over Paris, Mexico City, and Toronto, and its link to PM2.5 during pollution events[J],2022,22(19):16.
APA	Viatte, Camille.,Abeed, Rimal.,Yamanouchi, Shoma.,Porter, William C..,Safieddine, Sarah.,...&Clerbaux, Cathy.(2022).NH3 spatiotemporal variability over Paris, Mexico City, and Toronto, and its link to PM2.5 during pollution events.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(19),16.
MLA	Viatte, Camille,et al."NH3 spatiotemporal variability over Paris, Mexico City, and Toronto, and its link to PM2.5 during pollution events".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.19(2022):16.