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Long range transport of fine particle windblown soils and coal fired power station emissions into Hanoi between 2001 to 2008

机译:在2001年至2008年之间,将细颗粒的风吹土和燃煤电厂的排放物远程运输到河内

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摘要

Fine particulate matter (PM_(2.5)), source fingerprints and their contributions have been measured and reported previously at Hanoi, Vietnam, from 25 April 2001 to 31 December 2008. In this study back trajectories are used to identify long range transport into Hanoi for two of these sources, namely, windblown dust (Soil) from 12 major deserts in China and emissions from 33 coal fired power plants (Coal) in Vietnam and China. There were 28 days of extreme Soil events with concentrations greater than 6 μg m~(-3) and 25 days of extreme Coal with concentrations greater than 30 μg m~(-3) from a total of 748 sampling days during the study period. Through the use of back trajectories it was found that long range transport of soil from the Taklamakan and Gobi desert regions (more than 3000 km to the north west) accounted for 76% of the extreme events for Soil. The three local Vietnamese power stations contributed to 15% of the extreme Coal events, while four Chinese power stations between 300 km and 1700 km to the north-east of Hanoi contributed 50% of the total extreme Coal events measured at the Hanoi sampling site.
机译:先前已于2001年4月25日至2008年12月31日在越南河内对细颗粒物(PM_(2.5)),源指纹及其贡献进行了测量和报告。在本研究中,使用回溯轨迹确定了向河内的远距离迁移其中两个来源,即来自中国12个主要沙漠的风吹尘埃(土壤)和来自越南和中国33个燃煤电厂(煤炭)的排放。在研究期间,总共有748个采样日,其中有28天的极端土壤事件浓度大于6μgm〜(-3),有25天的极端煤炭事件浓度大于30μgm〜(-3)。通过使用后向轨迹,发现从塔克拉玛干和戈壁沙漠地区(到西北超过3000公里)的土壤远程运输占土壤极端事件的76%。越南的三个地方发电厂占极端煤炭事件的15%,而河内东北300公里至1700公里之间的四个中国发电厂则占河内采样现场总极端煤炭事件的50%。

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