Characteristics of the atmospheric particle formation events observed at a borel forest site in southern Finland
Characteristics of the atmospheric particle formation events observed at a borel forest site in southern Finland
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DOI：
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发表时间：
2000
影响因子：
1.2
通讯作者：
J. Mäkelä;M. D. Maso;L. Pirjola;P. Keronen;L. Laakso;M. Kulmala;A. Laaksonen
中科院分区：
文献类型：
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作者：
J. Mäkelä;M. D. Maso;L. Pirjola;P. Keronen;L. Laakso;M. Kulmala;A. Laaksonen
我们分析了在芬兰南部Hyytiala的一个北方森林地点观测到的184个新的大气气溶胶粒子的形成事件。对形成事件的识别、选择和分类是基于1996年1月31日至1999年9月18日(1327天)期间亚微米粒子的连续实验尺寸分布数据。对形成事件进行了分类，量化了颗粒形成的开始时间和持续时间、产生新颗粒的数量、形成爆发开始时的颗粒增长速率以及形成后观察到的8h增长后的最终颗粒尺寸等特征。3 nm粒子J3的形成速率在0.001-1粒子cm-3 S-1范围内变化。超细粒子的生长速率在1-17 nm h-1范围内变化。讨论了新颗粒的表观形成速率和形成后的生长速率之间可能存在的耦合。
We analysed 184 formation events of new atmospheric aerosol particles, observed at a boreal forest site in Hyytiala, southern Finland. Recognition, selection and classification of the formation events was based on continuous experimental size distribution data for submicron particles from a period 31 January 1996-18 September 1999 (1327 days). The formation events were classified, and their characteristic features such as the starting time and duration of the particle formation, the number of new particles produced, the particle growth rate at the beginning of the formation burst, and the final particle size after the observed 8-hour growth subsequent to formation, were quantified. The formation rate of 3 nm particles, J 3 , varied in the range 0.001-1 particles cm -3 s -1 . The ultrafine particle growth rates varied in the range 1-17 nm h -1 . The possible coupling between the apparent formation rate of new particles and their growth rate subsequent to formation was discussed.