Increases in Biogenic Volatile Organic Compound Concentrations Observed after Rains at Six Forest Sites in Non-Summer Periods
Increases in Biogenic Volatile Organic Compound Concentrations Observed after Rains at Six Forest Sites in Non-Summer Periods
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DOI：
10.3390/atmos11121381
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发表时间：
2020-12
期刊：
影响因子：
2.9
通讯作者：
T. Miyama;T. Morishita;Y. Kominami;H. Noguchi;Y. Yasuda;N. Yoshifuji;M. Okano;K. Yamanoi;Y. Mizoguchi;S. Takanashi;K. Kitamura;Kazuho Matsumoto
中科院分区：
文献类型：
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作者：
T. Miyama;T. Morishita;Y. Kominami;H. Noguchi;Y. Yasuda;N. Yoshifuji;M. Okano;K. Yamanoi;Y. Mizoguchi;S. Takanashi;K. Kitamura;Kazuho Matsumoto
由于生物源挥发性有机化合物（BVOCs）是臭氧的重要前体物，因此需要监测BVOC的浓度分布。一般来说，森林BVOC浓度在夏季以及其他季节增加。本研究旨在检测在非夏季月份BVOC浓度的时间零星增加，并分析发生的气候条件。使用统一的采样系统和共享的气相色谱-质谱仪，异戊二烯和单萜的浓度在6个日本森林观察约每月一次，为期3年。利用观测数据，BVOC浓度的增加和气象因素之间的关系进行了评估。观察到20例BVOC浓度暂时增加的情况。异戊二烯和单萜的变化主要发生在春季和秋季。在非夏季月份的大部分增加后观察到的降雨事件，当每日温度范围是大的，这表明风，雨，和一个快速的昼夜温度上升可能是在非夏季月份的因素。因此，BVOC浓度的网络监测可能是有效的了解其他因素的影响，而不是温度，和时间的增加，在不同的森林BVOC浓度的机制和频率。
Since biogenic volatile organic compounds (BVOCs) are important precursors of ozone, the monitoring of the BVOC concentration distributions is needed. In general, forest BVOC concentrations increase in summer as well as in other seasons. This study aims to detect temporally sporadic increases in BVOC concentrations in the non-summer months and to analyze the occurring climatic conditions. Using a uniform sampling system and shared gas chromatography–mass spectrometry, the concentrations of isoprene and monoterpenes in six Japanese forests were observed approximately once a month for 3 years. Using the observed data, the relations between the BVOC concentration increases and meteorological factors were evaluated. Twenty instances of temporal increases in BVOC concentrations were observed. These mainly occurred in spring for isoprene and in autumn for monoterpenes. Most of the increases in the non-summer months were observed after a rainfall event, when the daily temperature range was large, suggesting that wind, rain, and a rapid diurnal temperature rise could be factors in the non-summer months. Thus, the network monitoring of BVOC concentrations might be effective for understanding the effects of factors other than temperature, and the mechanisms and frequency of the temporal increases, on the BVOC concentrations in various forests.