DOI: 10.1002/2013GB004802
Scopus记录号: 2-s2.0-84906053506
论文题名: Characterizing the annual cycle of African dust transport to the Caribbean Basin and South America and its impact on the environment and air quality
作者: Prospero J ; M ; , Collard F ; -X ; , Molinié J ; , Jeannot A
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 7 起始页码: 757
结束页码: 773
语种: 英语
英文关键词: African dust
; air quality
; climate
; health
; PM10
Scopus关键词: Air quality
; Atmospheric aerosols
; Climate change
; Health
; Particles (particulate matter)
; Aerosol optical depths
; African dust
; Airborne particulate matters
; Biogeochemical process
; climate
; Impact on the environment
; PM10
; World Health Organization
; Dust
; aerosol
; air quality
; annual cycle
; climate change
; dust
; optical depth
; particulate matter
; satellite data
; summer
; Amazon Basin
; Barbados
; Cayenne
; French Guiana
; Guadeloupe
; Leeward Islands [Lesser Antilles]
; South America
英文摘要: Decades of aerosol measurements on Barbados have yielded a detailed picture of African mineral dust transport to the Caribbean Basin that shows a strong seasonal cycle with a maximum in boreal summer and a minimum in winter. Satellite aerosol products suggest that in spring, there is a comparable transport to northeastern South America. Here we characterize the complete annual cycle of dust transport to the western Atlantic by linking the Barbados record to multiyear records of airborne particulate matter less than 10 μm diameter (PM10) measured in air quality programs at Cayenne (French Guiana) and Guadeloupe. Comparisons of PM10 at these sites with concurrent dust measurements at Barbados demonstrate that high PM10 levels are almost entirely due to dust. Cayenne PM10 peaks in spring in a cycle which is consistent with satellite aerosol optical depth and suggests that the Sahel is the dominant source. The persistent transport of dust during much of the year could impact a wide range of environmental processes over a broad region that extends from the southern United States to the Amazon Basin. Finally, the average 24 h PM10 concentrations at Cayenne and Guadeloupe frequently exceed the World Health Organization air quality guideline. Thus soil dust PM10 could be a significant, but generally unrecognized, health factor at western Atlantic sites and also in other relatively remote regions affected by long-range dust from Africa. Because dust emissions and transport are highly sensitive to climate variability, climate change in coming decades could greatly affect a wide range of biogeochemical processes and human health in this region. Key Points Spring dust transport to South America comparable to Caribbean in summer African dust events at Cayenne and Amazonia linked to emissions from Sahel WHO PM10 air quality standard is frequently exceeded because of African dust ©2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77534
Appears in Collections: 气候变化事实与影响
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作者单位: Cooperative Institute for Marine and Atmospheric Studies, Rosentiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States; Observatoire Regional de l'Air, Cayenne, France; Université des Antilles et de la Guyane, Guadeloupe
Recommended Citation:
Prospero J,M,, Collard F,et al. Characterizing the annual cycle of African dust transport to the Caribbean Basin and South America and its impact on the environment and air quality[J]. Global Biogeochemical Cycles,2014-01-01,28(7)