A comparison between stomatal ozone uptake and AOT40 of deciduous trees in Japan
Y Hoshika , Y Shimizu, K Omasa
iForest - Biogeosciences and Forestry, Volume 4, Issue 3, Pages 128-135 (2011)
doi: https://doi.org/10.3832/ifor0573-004
Published: Jun 01, 2011 - Copyright © 2011 SISEF
Research Articles
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.
Keywords
Deciduous forest trees, Ozone uptake modeling, Stomatal conductance, Japan, Ozone
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Citation
Hoshika Y, Shimizu Y, Omasa K (2011). A comparison between stomatal ozone uptake and AOT40 of deciduous trees in Japan. iForest 4: 128-135. - doi: 10.3832/ifor0573-004
Paper history
Received: Feb 15, 2011
Accepted: Mar 31, 2011
First online: Jun 01, 2011
Publication Date: Jun 01, 2011
Publication Time: 2.07 months
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© SISEF - The Italian Society of Silviculture and Forest Ecology 2011
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