气候变化领域集成服务门户(CCPortal): Extreme; wintertime Saharan dust intrusion in the Iberian Peninsula: Lidar monitoring and evaluation of dust forecast models during the February 2017 event

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DOI	10.1016/j.atmosres.2019.06.007
	Extreme; wintertime Saharan dust intrusion in the Iberian Peninsula: Lidar monitoring and evaluation of dust forecast models during the February 2017 event
	Fernández A.J.; Sicard M.; Costa M.J.; Guerrero-Rascado J.L.; Gómez-Amo J.L.; Molero F.; Barragán R.; Basart S.; Bortoli D.; Bedoya-Velásquez A.E.; Utrillas M.P.; Salvador P.; Granados-Muñoz M.J.; Potes M.; Ortiz-Amezcua P.; Martínez-Lozano J.A.; Artíñano B.; Muñoz-Porcar C.; Salgado R.; Román R.; Rocadenbosch F.; Salgueiro V.; Benavent-Oltra J.A.; Rodríguez-Gómez A.; Alados-Arboledas L.; Comerón A.; Pujadas M.
发表日期	2019
ISSN	0169-8095
起始页码	223
结束页码	241
卷号	228
英文摘要	An unprecedented extreme Saharan dust event was registered in winter time from 20 to 23 February 2017 over the Iberian Peninsula (IP). We report on aerosol optical properties observed under this extreme dust intrusion through passive and active remote sensing techniques. For that, AERONET (AErosol RObotic NETwork) and EARLINET (European Aerosol Research LIdar NETwork) databases are used. The sites considered are: Barcelona (41.38°N, 2.17°E), Burjassot (39.51°N, 0.42°W), Cabo da Roca (38.78°N, 9.50°W), Évora (38.57°N, 7.91°W), Granada (37.16°N, 3.61°W) and Madrid (40.45°N, 3.72°W). Large aerosol optical depths (AOD) and low Ångström exponents (AE) are observed. An AOD of 2.0 at 675 nm is reached in several stations. A maximum peak of 2.5 is registered in Évora. During and around the peak of AOD, AEs close to 0 and even slightly negative are measured. With regard to vertically-resolved aerosol optical properties, particle backscatter coefficients as high as 15 Mm−1 sr−1 at 355 nm are recorded at the lidar stations. Layer-mean lidar ratios are found in the range 40–55 sr at 355 nm and 34–61 sr at 532 nm during the event. The particle depolarization ratios are found to be constant inside the dust layer, and consistent from one site to another. Layer-mean values vary in the range 0.19–0.31. Another remarkable aspect of the event is the limited vertical distribution of the dust plume which never exceeds 5 km. The extreme aspect of the event also presented a nice case for testing the ability of two dust forecast models, BSC-DREAM8b and NMMB/BSC-Dust, to reproduce the arrival, the vertical distribution and the intensity of the dust plume over a long-range transport region. In the particular case of the February 2017 dust event, we found a large underestimation in the forecast of the extinction coefficient provided by BSC-DREAM8b at all heights independently of the site. In contrast NMMB/BSC-Dust forecasts presented a better agreement with the observations, especially in southwestern part of the IP. With regard to the forecast skill as a function of lead time, no clear degradation of the prognostic is appreciated at 24, 48 and 72 h for Évora and Granada stations (South). However the prognostic does degrade (bias increases and/or correlation decreases) for Barcelona (North), which is attributed to the fact that Barcelona is at a greater distance from the source region and to the singularity of the event. © 2019
英文关键词	Dust forecast model; Extreme Saharan dust intrusion; Model evaluation; Multi-wavelength lidar; Particle optical properties; Sun-photometer; Vertical distribution
语种	英语
scopus关键词	Ability testing; Aerosols; Dust; Forecasting; Internet protocols; Optical properties; Remote sensing; FORECAST model; Model evaluation; Multi-wavelengths; Particle optical properties; Saharan dust intrusions; Sun photometers; Vertical distributions; Optical radar; AERONET; aerosol property; climate prediction; dust; lidar; photometer; remote sensing; vertical distribution; weather forecasting; winter; Iberian Peninsula; Sahara
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/162059
作者单位	Department of Environment, Research Centre for Energy, Environment and Technology (CIEMAT), Madrid, Spain; Department of Signal Theory and Communications, CommSensLab, Universitat Politècnica de Catalunya, Barcelona, Spain; Ciències i Tecnologies de l'Espai - Centre de Recerca de l'Aeronàutica i de l'Espai/Institut d'Estudis Espacials de Catalunya (CTE-CRAE/IEEC), Universitat Politècnica de Catalunya, Barcelona, Spain; Institute of Earth Sciences and Department of Physics, ECT and IIFA, Universidade de Évora, Évora, Portugal; Department of Applied Physics, University of Granada, Granada, Spain; Andalusian Institute for Earth System Research (IISTA-CEAMA), Granada, Spain; Department of Physics of the Earth and Thermodynamics, University of Valencia, Valencia, Spain; Earth Sciences Department, Barcelona Supercomputing Center (BSC), Barcelona, Spain; Atmospheric Optic Group (GOA), University of Valladolid, Valladolid, United States
推荐引用方式 GB/T 7714	Fernández A.J.,Sicard M.,Costa M.J.,et al. Extreme; wintertime Saharan dust intrusion in the Iberian Peninsula: Lidar monitoring and evaluation of dust forecast models during the February 2017 event[J],2019,228.
APA	Fernández A.J..,Sicard M..,Costa M.J..,Guerrero-Rascado J.L..,Gómez-Amo J.L..,...&Pujadas M..(2019).Extreme; wintertime Saharan dust intrusion in the Iberian Peninsula: Lidar monitoring and evaluation of dust forecast models during the February 2017 event.Atmospheric Research,228.
MLA	Fernández A.J.,et al."Extreme; wintertime Saharan dust intrusion in the Iberian Peninsula: Lidar monitoring and evaluation of dust forecast models during the February 2017 event".Atmospheric Research 228(2019).