Spatial and seasonal distribution of aerosol chemical components in New York City: (1) Incineration, coal combustion, and biomass burning.
Spatial and seasonal distribution of aerosol chemical components in New York City: (1) Incineration, coal combustion, and biomass burning.
复制标题
纽约市气溶胶化学成分的空间和季节分布：（1）焚烧、煤炭燃烧和生物质燃烧。
DOI：
10.1038/jes.2011.16
复制
发表时间：
2011
影响因子：
4.5
通讯作者：
Lippmann,Morton
中科院分区：
文献类型：
--
作者：
Peltier,RichardE;Lippmann,Morton
我们描述了细颗粒物(PM2.5)及其12种组成化学元素的空间和时间模式，这些元素通常在纽约市(NYC)的居民点进行测量。这些元素，即镍、钒、砷、硒、S、氯、钠、钾、铅、铜、锌和锰，在冬季和夏季的10个PM2.5采样点具有显著的时空变异性。通过将元素归入传统的源解析类别，我们发现被认为具有共同源类别的PM2.5的特定化学成分，如燃煤的As和Se，并不总是遵循相同的时间或空间模式。PM2.5质量只有有限的空间变异性，夏季浓度略有增加。住宅地点的测量结果与环境保护局采样网络的测量结果平均一致，尽管我们发现，在区域浓度较低的时期，环境保护局的测量结果低估了住宅地点的PM2.5浓度。这些结果对更好地了解PM2.5的特定来源的暴露有意义，并对源-受体模拟示踪剂输入选择中使用的来源分布提出了一些担忧。
We describe spatial and temporal patterns of fine particulate matter (PM 2.5) and of 12 of its constituent chemical elements commonly observed in measurements at residential locations in New York City (NYC). These elements, that is, Ni, V, As, Se, S, Cl, Na, K, Pb, Cu, Zn, and Mn, had significant spatial and temporal variability at 10 PM 2.5 sampling locations during our winter and summer sampling campaigns. By grouping the elements into traditional source apportionment categories, we show that specific chemical components of PM 2.5 considered to have a common source category, such as As and Se for coal combustion, do not always follow the same temporal or spatial pattern. PM 2.5 mass had only limited spatial variability and a slight summertime concentration enhancement. Measurements at residential locations were, on average, consistent with EPA sampling network measurements, although we found that during times of low regional concentration, EPA measurements underestimated the PM 2.5 concentration at residential locations. These results have implications for improved understanding of exposures to specific sources of PM 2.5, and raise some concerns about source profiles used in source-receptor modeling tracer input selection.