Increasing Contributions of Temperature-Dependent Oxygenated Organic Aerosol to Summertime Particulate Matter in New York City
Increasing Contributions of Temperature-Dependent Oxygenated Organic Aerosol to Summertime Particulate Matter in New York City
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温度依赖性含氧有机气溶胶对纽约市夏季颗粒物的贡献不断增加
DOI：
10.1021/acsestair.3c00037
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发表时间：
2024
期刊：
影响因子：
--
通讯作者：
Roscioli, Joseph
中科院分区：
文献类型：
--
作者：
Hass-Mitchell, Tori;Joo, Taekyu;Rogers, Mitchell;Nault, Benjamin A.;Soong, Catelynn;Tran, Mia;Seo, Minguk;Machesky, Jo Ellen;Canagaratna, Manjula;Roscioli, Joseph
作为2022年夏季NYC-METS（纽约市大都市排放和转化测量）活动和ASCENT（大气科学和化学测量网络）观测网络的一部分，在曼哈顿和纽约皇后区对特定颗粒物进行了真实的测量，并进行了额外的气相测量。主要是由于在21世纪世纪观察到无机硫酸盐气溶胶成分减少，纽约市夏季气溶胶成分已成为主要有机（80-83%）。通过正矩阵因子分解的有机气溶胶源解析表明，这是由二次生产占主导地位的含氧有机气溶胶（OOA）源因子组成的OA的73-76%。主要因素包括与烹饪有关的有机气溶胶（COA）和类烃有机气溶胶（HOA），它们分别仅占OA的13-15%和10- 11%。尽管两个站点的PM2.5平均浓度相似，但OA源因子浓度存在相当大的时空变化。较少和较多氧化的OOA因子在这两个地点表现出明显的温度依赖性，在较高的温度下，包括在热浪期间，浓度增加，氧化程度更大。自2001年以来，二级OA具有很强的温度敏感性和夏季浓度的最小变化，对纽约市的空气质量政策构成了特殊的挑战，持续的气候变化和极端高温事件很可能会加剧这种挑战。
As part of the summer 2022 NYC-METS (New York City metropolitan Measurements of Emissions and TransformationS) campaign and the ASCENT (Atmospheric Science and Chemistry mEasurement NeTwork) observational network, speciated particulate matter was measured in real time in Manhattan and Queens, NY, with additional gas-phase measurements. Largely due to observed reductions in inorganic sulfate aerosol components over the 21st century, summertime aerosol composition in NYC has become predominantly organic (80–83%). Organic aerosol source apportionment via positive matrix factorization showed that this is dominated by secondary production as oxygenated organic aerosol (OOA) source factors comprised 73–76% of OA. Primary factors, including cooking-related organic aerosol (COA) and hydrocarbon-like organic aerosol (HOA) comprised minor fractions of OA, only 13–15% and 10–11%, respectively. The two sites presented considerable spatiotemporal variations in OA source factor concentrations despite similar average PM2.5concentrations. The less- and more-oxidized OOA factors exhibited clear temperature dependences at both sites with increased concentrations and greater degrees of oxidation at higher temperatures, including during a heatwave. With strong temperature sensitivity and minimal changes in summertime concentrations since 2001, secondary OA poses a particular challenge for air quality policy in NYC that will very likely be exacerbated by continued climate change and extreme heat events.
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影响因子：
6.3
作者：
B. Nault;D. Jo;B. McDonald;P. Campuzano‐Jost;D. Day;Weiwei Hu;J. Schroder;J. Allan;D. Blake;M. Canagaratna;H. Coe;M. Coggon;P. DeCarlo;G. Diskin;R. Dunmore;F. Flocke;A. Fried;J. Gilman;G. Gkatzelis;J. Hamilton;T. Hanisco;P. L. Hayes;D. Henze;A. Hodzic;J. Hopkins;Min Hu;L. G. Huey;B. Jobson;W. Kuster;A. Lewis;Meng Li;J. Liao;M. Nawaz;I. Pollack;J. Peischl;B. Rappenglück;C. Reeves;D. Richter;J. Roberts;T. Ryerson;M. Shao;J. Sommers;J. Walega;C. Warneke;P. Weibring;G. Wolfe;D. Young;Bin Yuan;Qiang Zhang;J. D. de Gouw;J. Jimenez
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作者：
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通讯作者：
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影响因子：
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作者：
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