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DOI	10.1016/j.atmosres.2020.105302
	How a mesoscale cyclonic vortex over Sahara leads to a dust outbreak in South-western Iberia
	Couto F.T.; Cardoso E.H.C.; Costa M.J.; Salgado R.; Guerrero-Rascado J.L.; Salgueiro V.
发表日期	2021
ISSN	0169-8095
卷号	249
英文摘要	The study focused on an exceptional desert dust outbreak episode, in particular on the role of atmospheric circulation transporting high amounts of dust toward Portugal in February 2017. In order to assess the atmospheric conditions behind the mineral dust layer observed in Évora from lidar observations, two simulations were performed with the Meso-NH model including dust emission but with different initialization times. The simulations were performed over a single domain that covers 3000 × 3600 km and with a 10 km resolution. The episode was governed by a variety of complex interactions between surface and atmospheric dynamics during nine days. The study highlights the role played by the regional orography of the North Africa producing mesoscale circulations, namely the airflow convergence and the development of a cyclonic vortex in the lower troposphere. The intense winds near the surface was the main factor controlling the mobilization of mineral dust particles. In addition, a low pressure system approaching from mid-latitudes was fundamental for the long-lasting event, as well as for the transport of desert dust toward Portugal. © 2020
英文关键词	Extraordinary desert dust outbreaks; Lidar observations; Meso-NH model; Modelling desert dust
语种	英语
scopus关键词	Vortex flow; Atmospheric circulation; Atmospheric conditions; Atmospheric dynamics; Cyclonic vortices; Low pressure systems; Lower troposphere; Mesoscale circulation; Mineral dust particles; Dust
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141650
作者单位	Instituto de Ciências da Terra – ICT (Polo de Évora), Universidade de Évora, Rua Romão Ramalho, 59, Évora, 7000-671, Portugal; Instituto de Ciências da Terra – ICT (Polo de Évora), Universidade de Évora, Departamento de Física, Escola de Ciências e Tecnologia, Rua Romão Ramalho, 59, Évora, 7000-671, Portugal; Instituto de Investigación del Sistema Tierra en Andalucía (IISTA-CEAMA), Universidad de Granada, Departamento de Física Aplicada, Granada, Spain
推荐引用方式 GB/T 7714	Couto F.T.,Cardoso E.H.C.,Costa M.J.,et al. How a mesoscale cyclonic vortex over Sahara leads to a dust outbreak in South-western Iberia[J],2021,249.
APA	Couto F.T.,Cardoso E.H.C.,Costa M.J.,Salgado R.,Guerrero-Rascado J.L.,&Salgueiro V..(2021).How a mesoscale cyclonic vortex over Sahara leads to a dust outbreak in South-western Iberia.Atmospheric Research,249.
MLA	Couto F.T.,et al."How a mesoscale cyclonic vortex over Sahara leads to a dust outbreak in South-western Iberia".Atmospheric Research 249(2021).