CO2 inhibition of global terrestrial isoprene emissions:: Potential implications for atmospheric chemistry
CO2 inhibition of global terrestrial isoprene emissions:: Potential implications for atmospheric chemistry
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DOI：
10.1029/2007gl030615
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发表时间：
2007-09-27
影响因子：
5.2
通讯作者：
Prentice, I. Colin
中科院分区：
文献类型：
--
作者：
Arneth, Almut;Miller, Paul A.;Prentice, I. Colin
[1]异戊二烯是陆地生物圈产生的主要挥发性有机化合物，是大气成分和气候的基础。它限制对流层氧化剂的浓度，影响甲烷等其他还原物种的寿命，并促进臭氧的产生。异戊二烯的氧化产物有助于气溶胶的增长。最近的共识认为，在冰川时期排放量低（有助于解释甲烷浓度低），而在温室世界中，由于与温度和陆地生产力的正相关关系，预计排放量高（导致臭氧浓度高）。然而，这种反应被抵消时，最近证明的抑制叶异戊二烯排放量增加大气中的CO2浓度占在一个过程为基础的模型。因此，异戊二烯可能在确定工业化前对流层OH浓度和冰川-间冰期甲烷趋势方面发挥很小的作用，而异戊二烯排放部分驱动的未来对流层O-3浓度高的预测可能需要修订。
[1] Isoprene is the dominant volatile organic compound produced by the terrestrial biosphere and fundamental for atmospheric composition and climate. It constrains the concentration of tropospheric oxidants, affecting the lifetime of other reduced species such as methane and contributing to ozone production. Oxidation products of isoprene contribute to aerosol growth. Recent consensus holds that emissions were low during glacial periods ( helping to explain low methane concentrations), while high emissions ( contributing to high ozone concentrations) can be expected in a greenhouse world, due to positive relationships with temperature and terrestrial productivity. However, this response is offset when the recently demonstrated inhibition of leaf isoprene emissions by increasing atmospheric CO2 concentration is accounted for in a process-based model. Thus, isoprene may play a small role in determining pre-industrial tropospheric OH concentration and glacial-interglacial methane trends, while predictions of high future tropospheric O-3 concentrations partly driven by isoprene emissions may need to be revised.