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首页> 外文期刊>Tellus, Series B. Chemical and Physical Meteorology >Aerosol particle formation events and analysis of high growth rates observed above a subarctic wetland-forest mosaic
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Aerosol particle formation events and analysis of high growth rates observed above a subarctic wetland-forest mosaic

机译：北极北极湿地-森林马赛克上空观测到的气溶胶颗粒形成事件和高增长率分析

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摘要

An analysis of particle formation (PF) events over a subarctic mire in northern Sweden was performed, based on number-size distributions of atmospheric aerosol particles (10-500 nm in diameter) and ions (0.4-40 nm in Tammet diameter). We present classification statistics for PF events from measurements covering the period July 2005-September 2006, with a break over the winter period. The PF event frequency peaked during the summer months, in contrast to other Scandinavian sites where the frequency is highest during spring and autumn. Our analysis includes calculated growth rates and estimates of concentrations and production rates of condensing vapour, deduced from the growth rates and condensational sink calculations, using AIS and SMPS data. Particle formation events with high growth rates (up to 50 nm h(-1)) occurred repeatedly. In these cases, the newly formed nucleation mode particles were often only present for periods of a few hours. On several occasions, repeated particle formation events were observed within 1 d, with differences in onset time of a few hours. These high growth rates were only observed when the condensation sink was higher than 0.001 s(-1).
机译：根据大气气溶胶颗粒（直径为10-500 nm）和离子（直径为Tammet直径为0.4-40 nm）的数量分布，对瑞典北部一个弧形泥潭上的颗粒形成（PF）事件进行了分析。我们提供了从2005年7月至2006年9月这段时间的测量结果得出的PF事件的分类统计数据，其中有一个冬季休息时间。与其他斯堪的纳维亚地区相反，PF事件发生频率在夏季月份达到峰值，而春季和秋季发生频率最高。我们的分析包括使用AIS和SMPS数据从增长率和冷凝水槽计算中得出的计算出的增长率以及冷凝蒸汽浓度和生产率的估算值。具有高生长速率（高达50 nm h（-1））的颗粒形成事件反复发生。在这些情况下，新形成的成核模式颗粒通常仅存在几个小时。在某些情况下，在1 d内观察到重复的颗粒形成事件，且开始时间相差数小时。仅当冷凝水槽高于0.001 s（-1）时才能观察到这些高的增长率。

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