Swedish Environmental Research Institute Ltd., Göteborg, Sweden.
Ambio. 2009 Dec;38(8):402-5. doi: 10.1579/0044-7447-38.8.402.
Ozone concentrations are generally considerably lower over northern Europe as compared with continental and southern Europe. However, ozone becomes toxic for vegetation mainly after it has been taken up into the leaf interior through the stomata. The rates of ozone uptake into the leaves are, somewhat simplified, the product of the air ozone concentrations and the degree of stomatal opening. The phytotoxic impacts of ozone can be almost as important in northern Europe as they are in continental and southern Europe. The long daylight hours as well as the rather humid environment conditions, both in the air and soil, promote stomatal openings in northern Europe. This article summarizes scientific evidence that supports the conclusion that ozone abatement policies regarding vegetation in Europe, as well as in the rest of the world, should be based on estimates of the leaf ozone uptake and not only on the ozone concentration in the air.
与欧洲大陆和南欧相比，北欧的臭氧浓度通常要低得多。然而，臭氧对植被的毒性主要是在通过气孔进入叶片内部后才产生的。臭氧进入叶片的速率，可以说是通过空气臭氧浓度和气孔开度的乘积来简化表示。臭氧对植物的毒性影响在北欧几乎和在欧洲大陆和南欧一样重要。漫长的白昼时间以及空气和土壤中相当潮湿的环境条件都促进了北欧气孔的开放。本文总结了科学证据，证明了这样的结论，即欧洲乃至世界其他地区有关植被的臭氧减排政策，应该基于叶片臭氧吸收的估计值，而不仅仅是空气中的臭氧浓度。
