Difference in ozone uptake in grassland species between open-top chambers and ambient air

Assessing the impacts of current and future concentrations of surface ozone on crop yield with meta-analysis

“…It has been shown that, in open-top chambers, O 3 uptake by plants is either larger (Nussbaum and Fuhrer, 2000) or smaller (Piikki et al, 2008) than in the field to the extent that would alter the resultant impacts on plants. Free-air controlled environment (FACE) technology provides a means to examine the impact of elevated [O 3 ] relative to current background [O 3 ] without the alterations to O 3 uptake by chambers (McLeod and Long, 1999).…”

Protection of plants from ambient ozone by applications of ethylenediurea (EDU): A meta-analytic review

“…However, OTCs have effects of their own, such as differences in microclimate, fixed gas flow and limited size of the chambers, which contributed to an over-or under-estimate of the O 3 effects on plants (Nussbaum and Fuhrer, 2000;Piikki et al, 2008a). In the recent decade, open-air fumigations (FACE systems) have been constructed and used at several locations to expose larger trees, crops and grasses (e.g.…”

FACE-ing the challenges of increasing surface ozone concentration in Asia

“…et al, 1973). The 'chamber effects' have been the issue of concern, since they could introduce a bias in the estimation of the O 3 impacts using the dose-response relationships derived from the chamber experiments (Nussbaum and Fuhrer, 2000). If the chamber effects were to be accounted for entirely by the alteration to the O 3 uptake rate in the plant leaves, the flux-based O 3 dose (e.g.…”

“…Mills et al, 2007) could eliminate the bias in the estimates of the O 3 impacts. Such an expectation has been questioned, however, by theoretical considerations (Kobayashi, 1996;Nussbaum and Fuhrer, 2000) and an observer's intuition (Kobayashi, 1999). It has been suggested that the dose-response relationships would change, as the plant growth changes due to the chamber effects (Kobayashi, 1999).…”