| 黄山秋季大气颗粒物理化特性 |
| 摘要点击 1326 全文点击 553 投稿时间：2019-06-24 修订日期：2019-10-13 |
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| 中文关键词 单颗粒飞行时间质谱仪 黄山 粒径分布 质谱特征 后向轨迹 |
| 英文关键词 single-particle time-of-flight mass spectrometer Mt. Huangshan size distribution mass spectral characteristics backward trajectory |
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| 中文摘要 |
| 为了研究华东背景地区大气单颗粒的理化特性，利用单颗粒飞行时间质谱仪（SPAMS）于2012年9月5日至10月28日在黄山对大气颗粒物进行了观测，并结合Hysplit后向轨迹模式探究了不同气团对颗粒物性质的影响.结果表明，黄山地区颗粒物可分为老化碳（Aged-EC）、富钾（K）、元素碳-有机碳混合物（ECOC）、有机碳（OC）、钠-钾混合物（NaK）、元素碳（EC）、元素碳-重金属混合物（ECHM）、重金属（HM）、矿物质（Minerals）共9类，其中Aged-EC占比最高，K其次，且含碳颗粒物老化程度较为严重.含碳颗粒物Aged-EC、ECOC和OC集中在积聚模态（0.2~1.4 μm），HM、NaK和Minerals则集中于粗粒子模态（>1.4 μm）.除K、ECHM和ECOC外，较高风速下不利于颗粒物的累积；相对湿度越高，含碳颗粒物的占比越大，而K、OC、Minerals和NaK的占比越小.聚类分析结果表明，采样时段内黄山地区主要受西北气团、海洋气团和局地气团影响.周边地区的工业排放、燃煤等活动是Aged-EC的首要贡献源. |
| 英文摘要 |
| To study the physical and chemical characteristics of single-particle aerosols in the background area of east China, a single-particle time-of-flight mass spectrometer (SPAMS) was used to observe the atmospheric particles in Mt. Huangshan from September 5, 2012 to October 28, 2012 and explore the influence of different air masses on the types and proportions of particles in combination with the HYSPLIT backward trajectory model. The results showed that the particles in Mt. Huangshan area can be divided into nine categories:Aged-EC, K, ECOC, OC, NaK, EC, ECHM, HM, and Minerals. Aged-EC accounted for the highest proportion, followed by K, and the aging degree of carbon particles was critical. The carbon particles classified as Aged-EC, ECOC, and OC were concentrated in the accumulation mode (0.2-1.4 μm), whereas HM, NaK, and Minerals were concentrated in the coarse particle mode (>1.4 μm). Apart from K, ECHM, and ECOC, higher wind speed was unfavorable to the accumulation of particles. The higher RH was, the higher the proportion of carbon particles was, while the proportions of K, OC, Minerals, and NaK were smaller. Cluster analysis results showed that the Mt. Huangshan area was mainly affected by northwest air mass, marine air mass, and local air mass. Industrial emissions and coal-burning activities in the surrounding areas were the primary contribution sources of Aged-EC. |
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