气候变化领域集成服务门户(CCPortal): Pollution aerosol in the Northeast: Northeastern-Midwestern contributions

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DOI	10.1126/science.228.4697.275
	Pollution aerosol in the Northeast: Northeastern-Midwestern contributions
	Rahn K.A.; Lowenthal D.H.
发表日期	1985
ISSN	0036-8075
起始页码	275
结束页码	284
卷号	228 期号:4697
英文摘要	In recent years, atmospheric scientists have been endeavoring to determine the relative contributions of local and distant sources to pollution aerosol in eastern North America. Elemental analysis of aerosol from various sites in the northeastern United States has revealed a persistent northeastern "foreground" upon which pulses of midwestem aerosol are superimposed every few days, in response to large-scale meteorological features. Regional apportionment of tracer elements and sulfate in summer and winter samples from Narragansett, Rhode Island, and Underbill, Vermont, shows that most of the elements come predominantly from northeastern sources. Notable exceptions include arsenic and indium, for which Canadian nonferrous smelters are important sources, and sulfur and selenium, for which the Midwest is an important source. During 1982 and 1983, the Northeast and the Midwest contributed comparably to aerosol sulfate at Narragansett and Underbill, in spite of the fact that the emissions of sulfur dioxide in the Midwest were ten times those in the Northeast; Canadian smelters accounted for less than 10 percent of the total sulfate. During a major pollution episode in July 1982, northeastern and midwestern sources produced comparable sulfate concentrations in Rhode Island, whereas midwestern sources dominated northeastern sources in Vermont. Thus, although distant midwestern sources affect the quantity of pollution aerosol in the Northeast and may dominate episodically, nearer northeastern sources are comparably important on the long term.
英文关键词	AIR POLLUTION - North America; ATMOSPHERIC MOVEMENTS; CANADIAN SMELTERS EMISSION; EASTERN NORTH AMERICA ACID DEPOSITION; NORTHEASTERN-MIDWESTERN AIR POLLUTION; POLLUTION AEROSOLS; AEROSOLS; arsenic; indium; selenium; sulfur; sulfur dioxide; aerosol; atmospheric dispersion; geographic distribution; nonhuman; priority journal; theoretical study; united states
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245161
作者单位	Center for Atmospheric Chemistry Studies, Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, United States
推荐引用方式 GB/T 7714	Rahn K.A.,Lowenthal D.H.. Pollution aerosol in the Northeast: Northeastern-Midwestern contributions[J],1985,228(4697).
APA	Rahn K.A.,&Lowenthal D.H..(1985).Pollution aerosol in the Northeast: Northeastern-Midwestern contributions.Science,228(4697).
MLA	Rahn K.A.,et al."Pollution aerosol in the Northeast: Northeastern-Midwestern contributions".Science 228.4697(1985).