气候变化领域集成服务门户(CCPortal): Poleward transport of African dust to the Iberian Peninsula organized by a barrier jet and hydraulic jumps: Observations and high-resolution simulation analyses

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DOI	10.1016/j.atmosenv.2021.118574
	Poleward transport of African dust to the Iberian Peninsula organized by a barrier jet and hydraulic jumps: Observations and high-resolution simulation analyses
	Dhital S.; Kaplan M.L.; Orza J.A.G.; Fiedler S.
发表日期	2021
ISSN	1352-2310
卷号	261
英文摘要	Most air quality stations in Spain exceeded the European Union's daily PM10 limit due to the February 2016 Saharan dust outbreak, which resulted from two successive dust storms in Northwest Africa. This study identifies the meso-β/meso-γ-scale dynamical processes responsible for developing these dust storms using observations and high-resolution Weather Research and Forecasting model coupled with Chemistry simulations. The results revealed that the first dust storm was associated with a strong barrier jet (BJ). The BJ formed on the southeastern foothills of the Saharan Atlas Mountains (SAM) when an easterly-northeasterly low-level Mediterranean flow was blocked by a stably stratified layer close to the SAM. The BJ intensified just after sunrise on 20 February and the associated near-surface peak winds organized the first dust storm. The second dust storm was linked to a mesoscale gravity wave (MGW) and hydraulic jumps. A long-lived westward propagating MGW was triggered by a downslope flow interacting with the stable layer near the northeastern edge of the Tinrhert Plateau in eastern Algeria. When this MGW crossed the Tademaït Plateau, hydraulic jumps formed on its lee side. The strong winds accompanying these hydraulic jumps formed the second dust storm on 21 February. The lifted dust extended over a depth of 2–3 km in the growing daytime boundary layer and was advected poleward by the southerly/southeasterly mid-tropospheric winds. Our results underline the importance of resolving terrain-induced mesoscale processes to understand dust storm dynamics, which are difficult to represent in coarse-resolution numerical models. © 2021
关键词	Barrier jet Hydraulic jumps Saharan dust storm Terrain-induced circulations WRF-chem
语种	英语
scopus关键词	Air quality; Boundary layers; Dust; Storms; Weather forecasting; Wind; African dust; Barrier jets; Dust storm; High resolution simulations; Iberian Peninsula; Mesoscale; Saharan dust storm; Simulation analysis; Terrain-induced circulation; WRF/Chem; Landforms; air quality; boundary layer; dust storm; gravity wave; numerical model; Algeria; article; boundary layer; dust storm; forecasting; gravity; simulation; Algeria; Atlas Mountains; Iberian Peninsula; Saharan Atlas
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248305
作者单位	Curretn at Jornada Experimental Range, New Mexico State University, Las Cruces, New Mexico, Mexico; Department of Applied Aviation Sciences, Embry-Riddle Aeronautical University, 3700 Willow Creek Road, Prescott, AZ 86301, United States; SCOLAb, Department of Applied Physics, Universidad Miguel Hernández de Elche, Av. de la Universidad s/n, Elche, 03202, Spain; Institute of Geophysics and Meteorology, University of Cologne, Pohligstr. 3, Köln, 50969, Germany
推荐引用方式 GB/T 7714	Dhital S.,Kaplan M.L.,Orza J.A.G.,et al. Poleward transport of African dust to the Iberian Peninsula organized by a barrier jet and hydraulic jumps: Observations and high-resolution simulation analyses[J],2021,261.
APA	Dhital S.,Kaplan M.L.,Orza J.A.G.,&Fiedler S..(2021).Poleward transport of African dust to the Iberian Peninsula organized by a barrier jet and hydraulic jumps: Observations and high-resolution simulation analyses.ATMOSPHERIC ENVIRONMENT,261.
MLA	Dhital S.,et al."Poleward transport of African dust to the Iberian Peninsula organized by a barrier jet and hydraulic jumps: Observations and high-resolution simulation analyses".ATMOSPHERIC ENVIRONMENT 261(2021).