DOI: 10.1016/j.atmosenv.2020.117354
论文题名: Assessment of a new detection threshold for PM10 concentrations linked to African dust events in the Caribbean Basin
作者: Euphrasie-Clotilde L. ; Plocoste T. ; Feuillard T. ; Velasco-Merino C. ; Mateos D. ; Toledano C. ; Brute F.-N. ; Bassette C. ; Gobinddass M.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 224 语种: 英语
英文关键词: Air quality
; Atmospheric aerosols
; Landforms
; Particle size
; Particle size analysis
; Refractive index
; Transportation routes
; Air mass back trajectories
; Air quality indices
; Caribbean area
; Desert dust
; PM10 threshold
; Dust
; aerosol property
; air mass
; air quality
; assessment method
; atmospheric circulation
; concentration (composition)
; desert
; detection method
; dust
; index method
; optical depth
; particulate matter
; threshold
; trajectory
; aerosol
; air quality
; Article
; Caribbean Islands
; climate
; dust
; human
; latitude
; mineral dust
; particle size
; particulate matter
; priority journal
; refraction index
; seasonal variation
; Atlantic Ocean
; Atlantic Ocean (East)
; Barbados
; Caribbean Sea
; Chad
; Guadeloupe
; Leeward Islands [Lesser Antilles]
; Martinique
; Puerto Rico
; Windward Islands [Lesser Antilles]
学科: Air mass back trajectories
; Air quality index
; AOD
; Caribbean area
; Desert dust
; PM10 threshold
中文摘要: The Lesser Antilles is an intermediate zone located between the Caribbean Sea and the Atlantic Ocean. This area is frequently affected by the major long range Saharan dust transportation from West African desert sources. The aerosols optical properties are provided by the AEronet Robotic NETwork (AERONET) measurement sites in Puerto Rico, Guadeloupe, and Barbados. Thus, Aerosols Optical Depth (AOD), Angstrom Exponent (AE), Volume Particle Size Distribution (VPSD), complex refractive indexes, and Single Scattering Albedo (SSA) were used to define the predominant type of atmospheric particles namely sea salt aerosols, mineral dust or aerosols mixture. Obtained results show that aerosols in the atmospheric column (AOD) and surface dust measurements (PM10) are well correlated with correlation coefficients of 0.72 and 0.81 respectively for Puerto Rico, and Guadeloupe. Detailed analysis of optical data associated to daily PM10 concentrations highlighted that dust phenomenon can be observable below PM10 threshold of 50 μg∕m3 given by the European directives to detect dust episodes. Indeed, for Caribbean islands, episodes of desert dust phenomenon have been detected from 35 μg∕m3. The climatological assessment of monthly dust events observed in Puerto Rico, Guadeloupe, and Martinique between 2006 and 2016 highlighted a low dust season from November to February and a high dust season from May to August. Both seasons are separated by two transition dust periods: March to April and September to October. Lastly, the day-to-day back trajectories (NOAA-HYSPLIT) illustrated the general atmospheric circulation and show three main dust transportation routes: the North West African Path (62.7%); the South West African Path (20.8%) ; and the North East Atlantic Path (15.1%). By computing the average PM10 concentrations bring from each path, we notice that South West African Path is the most loaded in mineral dust because he comes from one of the most persistently active and intense dust sources in the world, i.e. Bodélé Depression in northern Chad. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160906
Appears in Collections: 气候变化与战略
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作者单位: Department of Research in Geoscience, KaruSphère SASU, Abymes, Guadeloupe (F.W.I.), 97139, France; Univ Antilles, LaRGE Laboratoire de Recherche en Géosciences et Energies (EA 4935), Pointe-à-PitreF-97100, France; Departamento de Física Teórica Atómica y Óptica, Universidad de Valladolid, Grupo de Óptica Atmosférica, Valladolid, Spain; UMR Espace-Dev, Université de Guyane, Cayenne, Guyane, 97337, France
Recommended Citation:
Euphrasie-Clotilde L.,Plocoste T.,Feuillard T.,et al. Assessment of a new detection threshold for PM10 concentrations linked to African dust events in the Caribbean Basin[J]. Atmospheric Environment,2020-01-01,224