| 摘要: |
| 利用TSI公司的APS和SMPS系统，于2017年4月在江苏省环境监测中心点位连续一个月进行大气颗粒物数谱观测，结果表明，南京市春季典型月份大气颗粒物数浓度和体积浓度均值分别为1.64×104cm-3 和1.65×106 μm3 /m3 ；核模态、爱根核膜态、积聚模态和粗粒子模态数浓度占比分别为22.72%,53.52%,23.72%和0.05%，体积浓度占比分别为0.01%,1.76%,55.82%和42.41%；颗粒物数浓度平均日变化呈现双峰结构；PM2.5体积浓度和质量浓度具有高度相关性；存在明显的新生粒子事件，3~10 nm颗粒物数浓度小时均值短时>7 500 cm-3。 |
| 关键词: 数谱分布 南京 春季 大气颗粒物 |
| DOI： |
| 分类号:X513 |
| 文献标识码:B |
| 基金项目:国家重点研发计划基金资助项目（2016YFC0200505） |
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| Characteristics of Atmospheric Particle Number Size Distribution at a Typical Site in Nanjing during a Spring |
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DU Songshan，QIN Yanhong，ZHANG lin
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Jiangsu Environmental Monitoring Center, Nanjing，Jiangsu 210036, China
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| Abstract: |
| In April 2017, One month's atmospheric particle number size distribution observation was conducted at Jiangsu Provincial Environmental Monitoring Center using APS and SMPS systems produced by TSI Inc. The following results were obtained from the data analysis: in typical month of spring in Nanjing, the average value of atmospheric particle number concentration and its volume concentration were 1.64×104cm-3 and 1.65×106μm3/m3, respectively. The number concentration ratio of nuclear mode, Aitken mode,accumulation mode and rough particle mode were 22.72%, 53.52% ,23.72 % and 0.05%, and the ratios of volume concentration were 0.01%, 1.76%, 55.82% and 42.41%. The average daily variation of particle number concentration showed bimodal peak.There is a high degree of correlation between volume concentration and mass concentration of PM2.5. There are some newborn particle events, hourly number concentration of 3～10 nm particle can reach more than 7 500/cm-3. |
| Key words: Number size distribution Nanjing Spring Atmospheric particle |
