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首页> 外文期刊>Geophysical Research Letters >High concentrations of reactive biogenic VOCs at a high altitude site in late autumn
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High concentrations of reactive biogenic VOCs at a high altitude site in late autumn

机译:深秋高海拔地区的高活性生物VOC

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Volatile organic compounds (VOCs) at the Sonnblick Observatory. Austria (3106 m a.s.l.) were measured in autumn 1999 using proton-transfer-reaction mass spectrometry (PTR-MS). Anthropogenic VOCs at this remote site, such as benzene and toluene (50 pptv to 2 ppbv), were primarily traced to air from urban areas. In mid-November, following a hard freeze in the central Alps, a different pattern of VOCs developed similar to that seen with C5 and C6 leaf wound compounds (0.5 to 5 ppbv range). The common origins of these compounds are proposed to be freeze-damaged leaves, inferred from laboratory investigations that identified hexenals, hexanal, methylbutanals, pentenol and pentenone formation in such leaves. We suggest that deciduous forests can release large amounts of reactive VOCs during the autumn, and that these releases may be important for regional tropospheric chemistry. [References: 19]
机译:Sonnblick天文台的挥发性有机化合物(VOC)。奥地利(3106 m a.s.l.)于1999年秋季使用质子转移反应质谱仪(PTR-MS)进行了测量。该偏远地区的人为挥发性有机化合物(VOC),例如苯和甲苯(50 pptv至2 ppbv),主要来自城市地区的空气。 11月中旬,在阿尔卑斯山中部发生严重冰冻之后,出现了与C5和C6叶片缠绕化合物(0.5到5 ppbv范围)相似的不同VOC模式。这些化合物的常见来源被认为是冻害的叶子,这是通过实验室研究推断得出的,这些研究确定了这些叶子中的己烯醛,己醛,甲基丁醛,戊烯醇和戊烯酮的形成。我们建议落叶林在秋季可以释放大量的活性VOC,这些释放对于区域对流层化学可能很重要。 [参考:19]

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