Hourly measurements of fine particulate sulfate and carbon aerosols at the Harvard-U.S. Environmental Protection Agency Supersite in Boston.
Hourly measurements of fine particulate sulfate and carbon aerosols at the Harvard-U.S. Environmental Protection Agency Supersite in Boston.
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DOI：
10.3155/1047-3289.60.11.1327
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发表时间：
2010-11
期刊：
影响因子：
--
通讯作者：
Suh HH
中科院分区：
文献类型：
--
作者：
Kang CM;Koutrakis P;Suh HH
2007年1月至2008年10月，位于马萨诸塞州波士顿的哈佛-美国环境保护署超级站点测量了环境中细颗粒物硫酸盐和碳质气溶胶(元素碳[EC]、有机碳[OC]和黑碳[BC])的每小时浓度。将这些小时浓度与在6天或24小时内使用综合滤光片测量得出的浓度进行比较。对于硫酸盐，两种测定方法具有较好的一致性。EC和OC的半连续测量也与使用24小时集成滤光片和光学BC参照法获得的结果一致(但不是硫酸盐)。在研究期间，24小时PM2.5(空气动力学直径的颗粒物[PM]≤2.5μm)浓度介乎1.4至37.6μg/m，平均为9.3μg/m 3。硫酸盐相当于硫酸铵占PM2.5质量的39.1%，而EC和OC分别占4.2%和35.2%。每小时的硫酸盐浓度没有明显的日变化规律，而每小时的EC和BC浓度在早上高峰时间7：00到9：00之间达到峰值。有机碳浓度在白天也表现出不明显的小峰值，很可能分别与交通、次生有机气溶胶和当地来源有关。
Hourly concentrations of ambient fine particle sulfate and carbonaceous aerosols (elemental carbon [EC], organic carbon [OC], and black carbon [BC]) were measured at the Harvard–U.S. Environmental Protection Agency Supersite in Boston, MA, between January 2007 and October 2008. These hourly concentrations were compared with those made using integrated filter-based measurements over 6-day or 24-hr periods. For sulfate, the two measurement methods showed good agreement. Semicontinuous measurements of EC and OC also agreed (but not as well as for sulfate) with those obtained using 24-hr integrated filter-based and optical BC reference methods. During the study period, 24-hr PM2.5 (particulate matter [PM] ≤ 2.5 μm in aerodynamic diameter) concentrations ranged from 1.4 to 37.6 μg/m3, with an average of 9.3 μg/m3. Sulfate as the equivalent of ammonium sulfate accounted for 39.1% of the PM2.5 mass, whereas EC and OC accounted for 4.2 and 35.2%, respectively. Hourly sulfate concentrations showed no distinct diurnal pattern, whereas hourly EC and BC concentrations peaked during the morning rush hour between 7:00 and 9:00 a.m. OC concentrations also exhibited nonpronounced, small peaks during the day, most likely related to traffic, secondary organic aerosol, and local sources, respectively.
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影响因子：
11.4
作者：
Arhami, M;Kuhn, T;Sioutas, C
通讯作者：
Sioutas, C
DOI：
10.1016/0960-1686(92)90358-r
发表时间：
1992-09-01
期刊：
ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS
影响因子：
--
作者：
PANDIS, SN;HARLEY, RA;SEINFELD, JH
通讯作者：
SEINFELD, JH
影响因子：
5
作者：
Drewnick, F;Schwab, JJ;Demerjian, KL
通讯作者：
Demerjian, KL
影响因子：
5.2
作者：
Snyder, David C.;Schauer, James J.
通讯作者：
Schauer, James J.
影响因子：
11.4
作者：
Fine, PM;Chakrabarti, B;Sioutas, C
通讯作者：
Sioutas, C