Determination of the Source Areas Contributing to Regionally High Warm Season PM2.5 in Eastern North America
Determination of the Source Areas Contributing to Regionally High Warm Season PM2.5 in Eastern North America
复制标题
北美东部地区暖季 PM2.5 源区的确定
DOI：
10.1080/10473289.2004.10470984
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发表时间：
2004
影响因子：
2.7
通讯作者：
A. Mamedov
中科院分区：
文献类型：
--
作者：
J. Brook;D. Johnson;A. Mamedov
摘要应用一种称为定量传输偏差分析的集合轨迹分析技术来确定哪些地理区域系统性地对北美东部的细颗粒物质量(PM2.5)做出了高于和低于平均水平的贡献。在北美东部的12个农村或郊区，使用锥形元素振荡微天平收集的6小时平均测量值分别与2000年和2001年暖季(5月至9月)相应的3天回溯轨迹相关联。北美东北部的大部分人口聚集区都与PM2.5浓度高于平均水平有关。定量交通偏差分析模式的精细结构表明，来自俄亥俄河谷的交通，特别是该地区的东部，最常与最高的PM2.5浓度有关。此外，源自俄亥俄州东南部到弗吉尼亚州西部以及肯塔基州西部到田纳西州中部的较大区域的气团往往会导致北美东北部的PM2.5浓度相对较高。这些基于观测的发现与主要二氧化硫排放源和氮点源的主要氧化物的空间分布一致。
Abstract An ensemble-trajectory analysis technique known as Quantitative Transport Bias Analysis was applied to determine which geographic areas systematically contributed to above- and below-average fine particle mass (PM2.5) over eastern North America. Six-hour average measurements from 12 rural or suburban locations in eastern North America collected using a tapered element oscillating microbalance were individually associated with corresponding 3-day back-trajectories for the warm seasons (May–September) of 2000 and 2001. Much of the populated areas of northeastern North America were implicated in the build-up of PM2.5 to above-average concentrations. The finer structure of the Quantitative Transport Bias Analysis pattern indicated that transport from the Ohio River Valley, particularly the eastern portion of this area, was most often associated with the highest PM2.5 concentrations. In addition, air masses originating over a relatively large area from southeast Ohio to the western part of Virginia and the western Kentucky to central Tennessee area tended to result in relatively high PM2.5 concentrations over northeastern North America. These observation-based findings were consistent with the spatial distribution of the main sulfur dioxide emissions sources and the major oxides of nitrogen point sources.