Methyl chloride and C2-C5 hydrocarbon emissions from dry leaf litter and their dependence on temperature
Methyl chloride and C2-C5 hydrocarbon emissions from dry leaf litter and their dependence on temperature
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干燥落叶层中的氯甲烷和 C2-C5 碳氢化合物排放及其对温度的依赖性
DOI：
10.1016/j.atmosenv.2011.03.016
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发表时间：
2011
影响因子：
5
通讯作者：
Röckmann
中科院分区：
文献类型：
--
作者：
Derendorp;Holzinger;Wishkerman;Keppler;Röckmann
据报告，不同植物物种在20-100 °C温度范围内从干燥落叶中排放的氯甲烷和若干C2-C5碳氢化合物。乙烷、乙烯、丙烷、丙烯、正戊烷和氯甲烷的排放速率随温度的升高而增加。在20 °C时测得的碳氢化合物排放率高达0.88 ng gdw−1h− 1，而在此温度下观测到的氯甲烷排放率在0.03和0.85 ng gdw−1h− 1之间。在70 °C时，C2-C5碳氢化合物的排放率增加到650 ng gdw−1h− 1，氯甲烷的排放率增加到18 μg gdw−1h− 1。Arkalius关系可以用来描述氯甲烷排放量的温度依赖性，而碳氢化合物的排放量偏离这个关系。发射不是由于酶活性，这是由发射率，不断增加的温度和活化能高于50 kJ mol−1。在恒温条件下，枯落物中氯甲烷和碳氢化合物的释放速率均随时间的推移而降低。在高温（80-100 °C）下，这在数小时的时间尺度上是明显的，而在低温（20-30 °C）下，减少非常缓慢，并且仅在数月的时间尺度上可见。来自落叶层的甲基氯排放量可能对其全球收支有重要意义，而温度引起的来自落叶层的碳氢化合物排放量可能微不足道。
Emissions of methyl chloride and several C2–C5hydrocarbons from dry leaf litter at temperatures in the range 20–100 °C are reported for different plant species. The emission rates of ethane, ethene, propane, propene,n-pentane and methyl chloride increased with temperature. Hydrocarbon emission rates up to 0.88 ng gdw−1h−1were measured at 20 °C, while methyl chloride emission rates between 0.03 and 0.85 ng gdw−1h−1were observed at this temperature. At 70 °C emission rates increased up to 650 ng gdw−1h−1for C2–C5hydrocarbons and up to 18 μg gdw−1h−1for methyl chloride. The Arrhenius relation can be used to describe the temperature dependence of methyl chloride emissions, while for hydrocarbon emissions deviations from this relation were observed. The emissions were not due to enzymatic activity, which was indicated by emission rates that continuously increased with increasing temperature, and activation energies higher than 50 kJ mol−1. At constant temperature, the emission rate of both methyl chloride and hydrocarbons from dry leaf litter decreased in time. At high temperatures (80–100 °C) this was noticeable on a timescale of hours, while at low temperatures (20–30 °C) the decrease was very slow and only visible on a timescale of months. Emission of methyl chloride from leaf litter might be significant for its global budget, while temperature induced hydrocarbon emissions from leaf litter are likely insignificant.
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DOI：
--
发表时间：
2010
期刊：
影响因子：
--
作者：
I. Vigano;R. Holzinger;F. Keppler;M. Greule;W. Brand;H. Geilmann;H. Weelden;T. Röckmann
通讯作者：
T. Röckmann
影响因子：
64.8
作者：
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Y. Yokouchi;M. Ikeda;Y. Inuzuka;T. Yukawa
影响因子：
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作者：
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通讯作者：
Schnitzler, Joerg-Peter
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影响因子：
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作者：
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通讯作者：
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线粒体形成乙烷和乙烯，作为响应植物组织损伤而发生需氧脂质降解的指示。
DOI：
--
发表时间：
1978
期刊：
Biochimica et Biophysica Acta
影响因子：
--
作者：
J. Konze;E. Elstner
通讯作者：
E. Elstner