Estimation of stomatal ozone uptake of deciduous trees in East Asia
Estimation of stomatal ozone uptake of deciduous trees in East Asia
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DOI：
10.1007/s13595-011-0051-9
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发表时间：
2011-04
影响因子：
3
通讯作者：
Y. Hoshika;T. Hajima;Y. Shimizu;M. Takigawa;K. Omasa
中科院分区：
文献类型：
--
作者：
Y. Hoshika;T. Hajima;Y. Shimizu;M. Takigawa;K. Omasa
为了评估臭氧对东亚温带落叶林木的风险，基于通量模型方法估算了气孔臭氧吸收。·方法在该模型中，关键参数取自有关东亚落叶树种的科学文献。结果AFst0(气孔臭氧累积摄取量)和AOT40(白天累积暴露浓度高于40 ppb)在空间格局上存在差异。虽然大多数臭氧浓度高的地区与湿润的气候地区相对应，但不仅臭氧浓度，而且叶片持续时间的长度和气孔对环境因素的特定反应都限制了东亚地区的AFst0。结论这些结果表明，基于气孔臭氧吸收的方法将是东亚臭氧风险评估的有用工具。
•BackgroundTo assess ozone risks to temperate deciduous forest trees in East Asia, the stomatal ozone uptake was estimated based on a flux-based modeling approach.•MethodsIn this model, key parameters were obtained from scientific literatures on deciduous tree species in East Asia. In addition, regional characteristics of the leaf duration were estimated using a phenological model.•ResultsThe result showed a difference in spatial pattern between AFst0 (accumulative stomatal ozone uptake) and AOT40 (accumulative exposure above a threshold concentration of 40 ppb during daylight hours). Although most of the areas of high ozone concentration corresponded to humid climate areas, not only the ozone concentration, but also the length of the leaf duration and the species-specific stomatal response to environmental factors, limited AFst0 in East Asia.•ConclusionThese results suggested that an approach based on stomatal ozone uptake would be a useful tool for ozone risk assessment in East Asia.