Wintertime Residential Biomass Burning in Las Vegas, Nevada; Marker Components and Apportionment Methods
Wintertime Residential Biomass Burning in Las Vegas, Nevada; Marker Components and Apportionment Methods
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DOI：
10.3390/atmos7040058
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发表时间：
2016-04-01
期刊：
影响因子：
2.9
通讯作者：
Collett, Jeffrey L., Jr.
中科院分区：
文献类型：
--
作者：
Brown, Steven G.;Lee, Taehyoung;Collett, Jeffrey L., Jr.
2008年1月，我们在内华达州拉斯维加斯的Fyfe小学通过多种方法表征了住宅生物质燃烧对细颗粒物浓度的贡献：在石英纤维过滤器上使用左旋葡萄糖;使用离子色谱粒液系统（PILS-IC）测量水溶性钾（K+）;和来自Aerodyne高分辨率气溶胶质谱仪（HR-AMS）的碎片C2 H4 O2+。还使用Magee Scientific Aethalometer来确定在UV（370 nm）和黑碳（BC，880 nm）通道处的气溶胶吸收，其中UV-BC差异指示生物质燃烧（BB）。左旋葡萄糖和AMS C2 H4 O2+测量值具有强相关性（r（2）= 0.92）; K+在晚上与C2 H4 O2+具有良好的相关性（r（2）= 0.86），但在其他时间不具有相关性。虽然K+可能是BB的指标，但它不一定是唯一的示踪剂，因为非BB源似乎对K+有显着贡献，并且可以每天变化。UV-BC差异与其他指标之间的相关性较低，可能是因为高速公路排放对BC浓度的影响很大。鉴于采样位置旁边的十二车道高速公路城市规模的生物质燃烧被发现是一个令人惊讶的大来源的气溶胶：一夜之间BB有机气溶胶的有机气溶胶质量的26%和33%之间的贡献。
We characterized residential biomass burning contributions to fine particle concentrations via multiple methods at Fyfe Elementary School in Las Vegas, Nevada, during January 2008: with levoglucosan on quartz fiber filters; with water soluble potassium (K+) measured using a particle-into-liquid system with ion chromatography (PILS-IC); and with the fragment C2H4O2+ from an Aerodyne High Resolution Aerosol Mass Spectrometer (HR-AMS). A Magee Scientific Aethalometer was also used to determine aerosol absorption at the UV (370 nm) and black carbon (BC, 880 nm) channels, where UV-BC difference is indicative of biomass burning (BB). Levoglucosan and AMS C2H4O2+ measurements were strongly correlated (r(2) = 0.92); K+ correlated well with C2H4O2+ (r(2) = 0.86) during the evening but not during other times. While K+ may be an indicator of BB, it is not necessarily a unique tracer, as non-BB sources appear to contribute significantly to K+ and can change from day to day. Low correlation was seen between UV-BC difference and other indicators, possibly because of an overwhelming influence of freeway emissions on BC concentrations. Given the sampling location-next to a twelve-lane freeway-urban-scale biomass burning was found to be a surprisingly large source of aerosol: overnight BB organic aerosol contributed between 26% and 33% of the organic aerosol mass.