Next-generation model for ozone-plant damage: a big step towards smaller uncertainties & more robust climate predictions

臭氧在对流层的化学成分中占据中心地位。臭氧是一种二次污染物，通过氮氧化物与来自天然和人造来源的挥发性有机化合物VOC的光化学反应而形成。它是一种重要的温室气体，对人类健康和生态系统的完整性和福利有害。臭氧一旦通过叶片气孔进入植物体内，就会强烈干扰叶片的生化反应，导致光合作用效率降低，叶片提前衰老，甚至导致部分或全部叶片坏死，Ainsworth等人2012年提出的结论。生产力下降的后果包括植物生长减少和大气中碳排放量减少，从而对气候产生巨大但不确定的间接影响。

Ozone holds centre stage in the chemical composition of the troposphere. Ozone is a secondary pollutant formed through photochemical reactions of nitrogen oxides with volatile organic compounds VOC from both natural and manmade sources. It is an important greenhouse gas and harmful to human health and ecosystem integrity and welfare. Once ozone has entered the plants via the leaf stomata it interferes strongly with the leafs biochemistry leading to reduced photosynthetic productivity early leaf senescence and even to partial or total leaf necrosis Ainsworth et al 2012. The consequences of reduced productivity include reduced plant growth and reduced carbon drawdown from the atmosphere thus acting as a large but uncertain indirect effect on climate.