气候变化领域集成服务门户(CCPortal): African dust particles over the western Caribbean - Part I: Impact on air quality over the Yucatán Peninsula

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DOI	10.5194/acp-21-239-2021
	African dust particles over the western Caribbean - Part I: Impact on air quality over the Yucatán Peninsula
	Ramírez-Romero C.; Jaramillo A.; Córdoba M.F.; Raga G.B.; Miranda J.; Alvarez-Ospina H.; Rosas D.; Amador T.; Kim J.S.; Yakobi-Hancock J.; Baumgardner D.; Ladino L.A.
发表日期	2021
ISSN	1680-7316
起始页码	239
结束页码	253
卷号	21 期号:1
英文摘要	On a global scale, African dust is known to be one of the major sources of mineral dust particles, as these particles can be efficiently transported to different parts of the planet. Several studies have suggested that the Yucatán Peninsula could be influenced by such particles, especially in July, associated with the strengthening of the Caribbean low-level jet. Although these particles have the potential to significantly impact the local air quality, as shown elsewhere (especially with respect to particulate matter, PM), the arrival and impact of African dust in Mexican territory has not been quantitatively reported to date. Two short-term field campaigns were conducted to confirm the arrival of African dust on the Yucatán Peninsula in July 2017 and July 2018 at the Mérida atmospheric observatory (20.98° N, 89.64° W). Aerosol particles were monitored at ground level using different online and off-line sensors. Several PM2.5and PM10 peaks were observed during both sampling periods, with a relative increase in the PM levels ranging between 200% and 500% with respect to the normal background conditions. Given that these peaks were found to be highly correlated with supermicron particles and chemical elements typically found in mineral dust particles, such as Al, Fe, Si, and K, they are linked with African dust. This conclusion is supported by combining back trajectories with vertical profiles from radiosondes, reanalysis, and satellite images to show that the origin of the air masses arriving at Mérida was the Saharan Air Layer (SAL). The good agreement found between the measured PM10concentrations and the estimated dust mixing ratio content from MERRA-2 (Version 2 of the Modern-Era Retrospective analysis for Research and Applications) corroborates the conclusion that the degradation of the local (and likely regional) air quality in Mérida is a result of the arrival of African dust. © 2021 American Institute of Physics Inc.. All rights reserved.
英文关键词	aerosol; air mass; air quality; jet stream; mineral dust; particulate matter; quantitative analysis; Caribbean Islands; Yucatan Peninsula
语种	英语
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/168847
作者单位	Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, Mexico City, Mexico; Posgrado en Ciencias Químicas, Universidad Nacional Autónoma de México, Mexico City, Mexico; Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico; Facultad de Ciencias, Universidad Nacional Autónoma de México, Mexico City, Mexico; Facultad de Química, Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico; Department of Community Health and Epidemiology, Dalhousie University, Halifax, NS, Canada; Droplet Measurement TechnologiesCO, United States
推荐引用方式 GB/T 7714	Ramírez-Romero C.,Jaramillo A.,Córdoba M.F.,et al. African dust particles over the western Caribbean - Part I: Impact on air quality over the Yucatán Peninsula[J],2021,21(1).
APA	Ramírez-Romero C..,Jaramillo A..,Córdoba M.F..,Raga G.B..,Miranda J..,...&Ladino L.A..(2021).African dust particles over the western Caribbean - Part I: Impact on air quality over the Yucatán Peninsula.Atmospheric Chemistry and Physics,21(1).
MLA	Ramírez-Romero C.,et al."African dust particles over the western Caribbean - Part I: Impact on air quality over the Yucatán Peninsula".Atmospheric Chemistry and Physics 21.1(2021).