Implications of climate change for the stomatal flux of ozone: A case study for winter wheat

被引：26

作者：

Harmens, Harry ^{[1
]}

Mills, Gina ^{[1
]}

Emberson, Lisa D. ^{[1
]}

Ashmore, Mike R. ^{[1
]}

机构：

[1] Ctr Ecol & Hydrol, Bangor LL57 2UP, Gwynedd, Wales

来源：

ENVIRONMENTAL POLLUTION | 2007年 / 146卷 / 03期

基金：

英国自然环境研究理事会;

关键词：

ozone; climate change; stomatal ozone flux; AOT40; winter wheat;

D O I：

10.1016/j.envpol.2006.05.018

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Climate change factors such as elevated CO2 concentrations, warming and changes in precipitation affect the stomatal flux of ozone (O-3) into leaves directly or indirectly by altering the stomatal conductance, atmospheric O-3 concentrations, frequency and extent of pollution episodes and length of the growing season. Results of a case study for winter wheat indicate that in a future climate the exceedance of the flux-based critical level of O-3 might be reduced across Europe, even when taking into account an increase in tropospheric background O-3 concentration. In contrast, the exceedance of the concentration-based critical level of O-3 will increase with the projected increase in tropospheric background O-3 concentration. The influence of climate change should be considered when predicting the future effects of O-3 on vegetation. There is a clear need for multi-factorial, open-air experiments to provide more realistic information for O-3 flux-effect modelling in a future climate. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：763 / 770

页数：8

共 49 条

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