Branch cuvettes as means of ozone risk assessment in adult forest tree crowns: combining experimental and modelling capacities

Wieser, Gerhard; Matyssek, Rainer; Götz, Bernhard; Grünhage, Ludger

doi:10.1007/s00468-012-0715-6

Cited by 12 publications

(6 citation statements)

References 65 publications

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“…Although in our field experiments at the treeline evergreen and deciduous conifers were exposed to different O 3 regimes, only mean O 3 concentrations above 120 nl l −1 induced statistically significant reductions in A max (Havranek et al, 1989;Volger, 1995) when compared to O 3 free controls in charcoal-filtered air. The basic assumption underlying the use of branch cuvettes for examining O 3 effects in entire crowns of mature trees has been justified by the principle of carbon autonomy regarding the overall carbon relations of individual branches, with respect to carbon gain, growth, and defense metabolism Matyssek et al, 2007;Wieser et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…CO 2 concentration inside the chambers was checked with a Li 6200 (Li-Cor, Lincoln, USA) gas analyser and adjusted by hand to 350 ± 30 mol mol −1 during daylight hours and was somewhat above ambient CO 2 during the night due to twig respiration . Comparative measurements of gas exchange and biochemical parameters did not reveal significant differences in photosynthetic capacity and antioxidant contents between twigs outside cuvettes and twigs exposed to the ambient O 3 regime inside cuvettes (Havranek and Wieser, 1994;Wieser et al, , 2012.…”

Section: Introductionmentioning

confidence: 93%

See 1 more Smart Citation

Foliage type specific susceptibility to ozone in Picea abies, Pinus cembra and Larix decidua at treeline: A synthesis

Wieser

Hecke

Tausz

et al. 2013

Environmental and Experimental Botany

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

Foliage type specific susceptibility to ozone in Picea abies, Pinus cembra and Larix decidua at treeline: A synthesis

Wieser

Hecke

Tausz

et al. 2013

Environmental and Experimental Botany

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“…Chamber methods are employed to isolate ozone uptake to foliage, soil, water, and other surfaces in the field (Almand-Hunter et al, 2015;Altimir et al, 2002;Fumagalli et al, 2016;Gut et al, 2002;Horváth et al, 2006;Kaplan et al, 1988;Kirkman et al, 2002;Meixner et al, 1997;Pilegaard, 2001;Remde et al, 1993;Tong et al, 2011;Unsworth et al, 1984;Wieser et al, 2012). However, previous work largely focuses on soil NO emissions (e.g., Gut et al, 2002;Horváth et al, 2006;Kaplan et al, 1988;Kirkman et al, 2002;Meixner et al, 1997;Remde et al, 1993) or plant responses to ozone (e.g., Tong et al, 2011;Wieser et al, 2012) rather than ozone deposition processes.…”

Section: Chamber Methodsmentioning

confidence: 99%

Dry Deposition of Ozone Over Land: Processes, Measurement, and Modeling

Clifton

Fiore

Massman

et al. 2020

Reviews of Geophysics

107

133

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Dry deposition of ozone is an important sink of ozone in near‐surface air. When dry deposition occurs through plant stomata, ozone can injure the plant, altering water and carbon cycling and reducing crop yields. Quantifying both stomatal and nonstomatal uptake accurately is relevant for understanding ozone's impact on human health as an air pollutant and on climate as a potent short‐lived greenhouse gas and primary control on the removal of several reactive greenhouse gases and air pollutants. Robust ozone dry deposition estimates require knowledge of the relative importance of individual deposition pathways, but spatiotemporal variability in nonstomatal deposition is poorly understood. Here we integrate understanding of ozone deposition processes by synthesizing research from fields such as atmospheric chemistry, ecology, and meteorology. We critically review methods for measurements and modeling, highlighting the empiricism that underpins modeling and thus the interpretation of observations. Our unprecedented synthesis of knowledge on deposition pathways, particularly soil and leaf cuticles, reveals process understanding not yet included in widely used models. If coordinated with short‐term field intensives, laboratory studies, and mechanistic modeling, measurements from a few long‐term sites would bridge the molecular to ecosystem scales necessary to establish the relative importance of individual deposition pathways and the extent to which they vary in space and time. Our recommended approaches seek to close knowledge gaps that currently limit quantifying the impact of ozone dry deposition on air quality, ecosystems, and climate.

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“…Ozone was monitored continuously inside the cuvette using a UV-absorption-based method (Horiba, model APOA-350E). The opening and closing dynamic branch cuvette system allowed an estimate of total ozone loss rates (Altimir et al, 2002;Wieser et al, 2012). Following closure, ambient concentrations decreased due to loss processes inside the system.…”

Section: Total O 3 Loss Ratesmentioning

confidence: 99%

Seasonal measurements of total OH reactivity emission rates from Norway spruce in 2011

et al. 2013

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Numerous reactive volatile organic compounds (VOCs) are emitted into the atmosphere by vegetation. Most biogenic VOCs are highly reactive towards the atmosphere's most important oxidant, the hydroxyl (OH) radical. One way to investigate the chemical interplay between biosphere and atmosphere is through the measurement of total OH reactivity, the total loss rate of OH radicals. This study presents the first determination of total OH reactivity emission rates (measurements via the comparative reactivity method) based on a branch cuvette enclosure system mounted on a Norway spruce (Picea abies) throughout spring, summer and autumn 2011. In parallel VOC emission rates were monitored by a second proton-transfer-reaction mass spectrometer (PTR-MS), and total ozone (O₃) loss rates were obtained inside the cuvette. Total OH reactivity emission rates were in general temperature and light dependent, showing strong diel cycles with highest values during daytime. Monoterpene emissions contributed most, accounting for 56–69% of the measured total OH reactivity flux in spring and early summer. However, during late summer and autumn the monoterpene contribution decreased to 11–16%. At this time, a large missing fraction of the total OH reactivity emission rate (70–84%) was found when compared to the VOC budget measured by PTR-MS. Total OH reactivity and missing total OH reactivity emission rates reached maximum values in late summer corresponding to the period of highest temperature. Total O₃ loss rates within the closed cuvette showed similar diel profiles and comparable seasonality to the total OH reactivity fluxes.

Total OH reactivity fluxes were also compared to emissions from needle storage pools predicted by a temperature-only-dependent algorithm. Deviations of total OH reactivity fluxes from the temperature-only-dependent emission algorithm were observed for occasions of mechanical and heat stress. While for mechanical stress, induced by strong wind, measured VOCs could explain total OH reactivity emissions, during heat stress they could not. The temperature-driven algorithm matched the diel variation of total OH reactivity emission rates much better in spring than in summer, indicating a different production and emission scheme for summer and early autumn. During these times, unmeasured and possibly unknown primary biogenic emissions contributed significantly to the observed total OH reactivity flux

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Branch cuvettes as means of ozone risk assessment in adult forest tree crowns: combining experimental and modelling capacities

Cited by 12 publications

References 65 publications

Foliage type specific susceptibility to ozone in Picea abies, Pinus cembra and Larix decidua at treeline: A synthesis

Foliage type specific susceptibility to ozone in Picea abies, Pinus cembra and Larix decidua at treeline: A synthesis

Dry Deposition of Ozone Over Land: Processes, Measurement, and Modeling

Seasonal measurements of total OH reactivity emission rates from Norway spruce in 2011

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