Temporal and Spatial Variability of Volatile Organic Compounds in the Forest Atmosphere
Temporal and Spatial Variability of Volatile Organic Compounds in the Forest Atmosphere
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DOI：
10.3390/ijerph16244915
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发表时间：
2019-12-02
影响因子：
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通讯作者：
Zabini, Federica
中科院分区：
文献类型：
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作者：
Meneguzzo, Francesco;Albanese, Lorenzo;Zabini, Federica
森林的治疗作用因其对人的心理和生理健康的贡献而日益受到重视，从而推动了旨在提高有关森林资源知识的进一步进展。植物释放并在森林大气中积累的生物源性挥发性有机化合物是森林愈合作用的重要贡献者，也是本研究的重点。利用光电离探测器，我们研究了意大利亚平宁山脉北部丘陵地区、森林小径和长途徒步小径上总挥发性有机化合物浓度的高频时空变化。浓度变异性的尺度与不到一小时的时间尺度和几百米的空间尺度内的绝对浓度水平相当。在白天，在晴朗和平静的日子里，浓度在中午到下午早些时候达到峰值，其次是清晨，下午晚些时候最低。这些结果与大气垂直稳定剖面等气象变量有关。此外，初步证据表明，与纯山毛榉林相比，以针叶树为主的森林中挥发性有机化合物的浓度更高。
The healing effects of the forest are increasingly being valued for their contribution to human psychological and physiological health, motivating further advances aimed at improving knowledge of relevant forest resources. Biogenic volatile organic compounds, emitted by the plants and accumulating in the forest atmosphere, are essential contributors to the healing effects of the forest, and represent the focus of this study. Using a photoionization detector, we investigated the high frequency variability, in time and space, of the concentration of total volatile organic compounds on a hilly site as well as along forest paths and long hiking trails in the Italian northern Apennines. The scale of concentration variability was found to be comparable to absolute concentration levels within time scales of less than one hour and spatial scales of several hundred meters. During daylight hours, on clear and calm days, the concentration peaked from noon to early afternoon, followed by early morning, with the lowest levels in the late afternoon. These results were related to meteorological variables including the atmospheric vertical stability profile. Moreover, preliminary evidence pointed to higher concentrations of volatile organic compounds in forests dominated by conifer trees in comparison to pure beech forests.