Prodigious Amounts of Hydrogen Oxides Generated by Corona Discharges on Tree Leaves
Prodigious Amounts of Hydrogen Oxides Generated by Corona Discharges on Tree Leaves
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DOI：
10.1029/2022jd036761
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发表时间：
2022-08-27
影响因子：
4.4
通讯作者：
Brune, W. H.
中科院分区：
文献类型：
--
作者：
Jenkins, J. M.;Olson, G. A.;Brune, W. H.
在实验室中，日冕放电在树叶上产生了大量的羟基自由基（OH），在雷暴期间也会发生在树木上。OH和HO2的产生速率取决于产生电晕放电的外加电场、叶片干燥度和叶片上液态水的存在。然而，对于给定的日冕紫外线（UV）通量，它们与叶片类型和电晕放电极性无关。OH、HO2和O-3的生成速率与日冕紫外线通量密切相关。虽然日冕产生的OH对全球OH总量的贡献不太可能是重要的，但日冕产生的OH可能比受影响叶片附近已知过程的氧化大几个数量级，可能影响大气氧化和树木和森林生态。
Prodigious amounts of the hydroxyl radical (OH) are generated in the laboratory on tree leaves by corona discharges, which also occur on trees during thunderstorms. Production rates of OH and HO2 depend on the applied electric field generating the corona discharge, leaf dryness, and the presence of liquid water on the leaf. However, they are independent of leaf type and corona discharge polarity for a given corona ultraviolet (UV) flux. Production rates of OH, HO2, and O-3 strongly correlate with corona UV flux. Although the contribution of corona-produced OH to total global OH production is unlikely to be important, corona-generated OH is likely a few orders of magnitude greater than oxidation by known processes in the vicinity of the affected leaves, potentially influencing atmospheric oxidation and tree and forest ecology.