A comparison between stomatal ozone uptake and AOT40 of deciduous trees in Japan
A comparison between stomatal ozone uptake and AOT40 of deciduous trees in Japan
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DOI：
10.3832/ifor0573-004
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发表时间：
2011-06
期刊：
影响因子：
--
通讯作者：
Y. Hoshika;Y. Shimizu;K. Omasa
中科院分区：
文献类型：
--
作者：
Y. Hoshika;Y. Shimizu;K. Omasa
摘要：比较了日本主要温带落叶树种（齿叶栎、毛叶杨、岳桦）的气孔臭氧吸收（AFst0）和浓度超过40 ppb（AOT40）的分布图。气孔臭氧吸收的估计完成使用估计的臭氧浓度，气候数据和植被数据。从日本的科学文献中收集了每个物种的关键参数，如气孔导度参数。气孔关闭引起的蒸汽压赤字影响AFSt0值在温暖的日本部分。因此，AOT40高的区域并不总是对应于AFst0高的区域。结果表明，使用AOT40的臭氧风险评估是VPD限制在日本中部，这意味着高估的风险相比，AFst0。虽然在欧洲，AOT 40是较高的水分胁迫是经常性的，AOT 40达到高峰，在日本中东部的凉爽和潮湿的气候地区，气孔臭氧吸收达到最大值。
Abstract: A comparison of the maps of stomatal ozone uptake (AFst0) and concentrations exceeding 40 ppb (AOT40) for dominant temperate deciduous tree species (Quercus serrata, Fagus crenata, Betula ermanii) was conducted in Japan. Estimations of stomatal ozone uptake were accomplished using estimated ozone concentration, climate data, and vegetation data. Key parameters such as stomatal conductance parameters for each species were collected from scientific literature in Japan. Stomatal closure induced by vapour pressure deficit affected the AFst0 values in warmer part of Japan. For this reason, the areas with high AOT40 did not always correspond to the areas with high AFst0. The result showed that ozone risk assessment using AOT40 is VPD-constrained in central Japan, which implies an overestimation of risk compared to AFst0. While in Europe AOT40 is higher where water stress is recurrent, AOT40 peaked in the cool and humid climate region of central-eastern Japan where also stomatal ozone uptake reached maximum values.