Atmospheric Environment (1967)最新文献

The use of stable lead 206207 isotope ratios and elemental composition to discriminate the origins of lead in aerosols at a rural site in eastern Canada 使用稳定的铅206207同位素比率和元素组成来区分加拿大东部农村地区气溶胶中铅的来源

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90049-8

W.T Sturges , Barrie L.A

引用次数: 89

Ozone concentrations above a Douglas-fir forest canopy in western Washington U.S.A. 美国华盛顿西部道格拉斯冷杉林冠层上方的臭氧浓度

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90011-5

Robert L. Edmonds, F.A. Basabe

{"title":"Ozone concentrations above a Douglas-fir forest canopy in western Washington U.S.A.","authors":"Robert L. Edmonds, F.A. Basabe","doi":"10.1016/0004-6981(89)90011-5","DOIUrl":"10.1016/0004-6981(89)90011-5","url":null,"abstract":"<div>Ozone concentrations were monitored above a 30 m Douglas-fir canopy at Cedar River, Washington from 1 April to 30 September in 1986 and 1987. Maximum average hourly ozone concentrations were similar in both years. Ozone concentrations exceeded 0.12 ppm on 2 days in 1986 and 1 day in 1987. Fifteen and 14 days had ozone concentrations greater than or equal to 0.08 ppm in 1986 and 1987, respectively. Ozone concentrations were positively related to daily radiation and maximum daily air temperature. However, only 46 per cent of the variance in ozone concentration in 1986 could be explained by solar radiation and even less was explained by maximum temperature (26%). In 1987, 51 and 54 per cent of the variation in ozone concentration was explained by solar radiation and temperature, respectively. Maximum average hourly ozone concentrations peaked near 1500 h (Pacific Standard Time) for days > 0.06 ppm with minimum values near 0600 h. Highest concentrations were observed when the wind was blowing from the northwest from the Seattle area indicating that photochemical oxidation of NOx was a major source of elevated ozone. If the data represent current levels of ozone some potential for forest damage exists in Puget Sound forests.</div>","PeriodicalId":100138,"journal":{"name":"Atmospheric Environment (1967)","volume":"23 3","pages":"Pages 625-629"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0004-6981(89)90011-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"52832577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Simulation of photochemical smog in the melbourne airshed: Worst case studies 墨尔本空气棚内光化学烟雾的模拟:最坏案例研究

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90014-0

G.D. Hess

{"title":"Simulation of photochemical smog in the melbourne airshed: Worst case studies","authors":"G.D. Hess","doi":"10.1016/0004-6981(89)90014-0","DOIUrl":"10.1016/0004-6981(89)90014-0","url":null,"abstract":"<div>The impact of a large NOx point source on photochemical smog in Melbourne is examined through the use of a numerical model described by Hess. Over most of the Melbourne Airshed the NMHC/NOx ratio is found to be less than 10, in agreement with the results of Evans et al. For these cases trajectories passing through the Newport Power Station exhibit a decrease in ozone (compared to background values) of about 0.02 ppm and an increase in nitrogen dioxide of about the same amount due to Newport's emissions. This result confirms a preliminary finding by Form and Substance (1982).However, worst case scenarios have not been previously studied. Measurements indicate that any trajectory that links the high NOx from Newport and the high NMHC from Pt Cook will result in a worst case. The windfield observations reported here show the existence of a topographically generated mesoscale eddy in the airshed, as proposed by Spillane (1978, Clean Air12, 50–56.), and its location tends to link Newport and Pt Cook. Simulation of two cases indicates that under worst case conditions Newport's emissions increase the ozone concentration by 0.01–0.04 ppm. These conditions are estimated to occur on one day in four to one day in three of high oxidant days in Melbourne.</div>","PeriodicalId":100138,"journal":{"name":"Atmospheric Environment (1967)","volume":"23 3","pages":"Pages 661-669"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0004-6981(89)90014-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"52832614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Content of quartz and mullite in some selected power-plant fly ash in Czechoslovakia 捷克斯洛伐克电厂粉煤灰中石英和莫来石的含量

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90018-8

David Havlíček, Rudolf Přibil, Bohumil Kratochvíl

{"title":"Content of quartz and mullite in some selected power-plant fly ash in Czechoslovakia","authors":"David Havlíček, Rudolf Přibil, Bohumil Kratochvíl","doi":"10.1016/0004-6981(89)90018-8","DOIUrl":"10.1016/0004-6981(89)90018-8","url":null,"abstract":"<div>This study was performed primarily to account for the differences between ice forming activity of fly ashes from different sources.Ten samples of fly ash from ten various power plants on our territory were examined by X-ray powder diffraction to determine the contents of quartz, mullite and hematite. The quartz content varied in the range 5–17% depending on the type of coal and mullite contents varied from 0 to 22%.The amounts of crystalline phases were compared with data about composition of ashes obtained by elemental chemical analysis. The distribution of silica and aluminia between crystalline phases and amorphous phase is discussed in connection with the origin of fly ash and with the differences observed in the ice forming activity. A direct relationship between the freezing temperatures and the contents of crystalline fractions in the samples does not exist but the presence of mullite and/or hematite in the concentrations found in samples could account for the observed freezing temperatures of droplets containing some of the samples.</div>","PeriodicalId":100138,"journal":{"name":"Atmospheric Environment (1967)","volume":"23 3","pages":"Pages 701-706"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0004-6981(89)90018-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"52832656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Observed and modeled trend of sulfate and nitrate in precipitation in eastern North America 北美东部降水中硫酸盐和硝酸盐的观测和模拟趋势

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90071-1

James A. Fay, Dan Golomb, Stephen G. Zemba

引用次数: 8

Air pollutant emissions by combustion processes in Italy 意大利燃烧过程排放的空气污染物

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90093-0

Willy Bocola, Mario C. Cirillo

引用次数: 33

Rotating shadowband photometer measurement of atmospheric turbidity: a tool for estimating visibility 旋转影带光度计测量大气浊度:估计能见度的工具

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90117-0

B.A. LeBaron , J.J. Michalsky , L. Harrison

引用次数: 5

A stochastic approach to the diffusion equation 扩散方程的随机方法

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90104-2

Raul Mihail , Liviu Ionită, Sorin Straja

引用次数: 3

Early smelter sites: A neglected chapter in the history and geography of acid rain in the United States 早期冶炼厂遗址:美国酸雨历史和地理中被忽视的一章

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90152-2

M.-L. Quinn

{"title":"Early smelter sites: A neglected chapter in the history and geography of acid rain in the United States","authors":"M.-L. Quinn","doi":"10.1016/0004-6981(89)90152-2","DOIUrl":"10.1016/0004-6981(89)90152-2","url":null,"abstract":"<div>Dominant spatial and temporal theories of acid rain in the U.S. are identified, followed by brief comments on how historical data have generally been used in modern acid rain research. A frequently-cited 1982 article by E.B. Cowling is examined, one that has influenced much thinking on the history of acid rain. The article overlooks early American smelters, however, and the role they played in the true history and geography of acid rain in the United States. Continuing with this theme, a connection is established between acid rain and turn-of-the-century smelter smoke problems. Literature on the latter subject is discussed, and American and German examples are given. A beginning is then made on writing acid rain's neglected chapter, focusing on Tennessee's Copper Basin (Ducktown District) where copper smelting dates back to the 1850s. A short historical overview of this area's smelting operations is given, with particular attention to the air pollution and other environmental problems resulting from large emissions of sulfur dioxide. Five additional early smelter sites for potential study are mentioned as well. The paper concludes with some observations regarding the way in which expanded research of early smelter sites could affect the general perception of acid rain in the U.S. It is also suggested that such research might contribute to a better atmosphere for making decisions and policies pertaining to the phenomenon as it exists today.</div>","PeriodicalId":100138,"journal":{"name":"Atmospheric Environment (1967)","volume":"23 6","pages":"Pages 1281-1292"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0004-6981(89)90152-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"52833694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

A method for determination of hydrogen peroxide in air : further discussion 空气中过氧化氢的测定方法:进一步讨论

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90125-X

Roger L. Tanner, Thomas J. Kelly

引用次数: 3