Modelling stomatal ozone flux across Europe

Emberson, Lisa; Ashmore, Mike; Cambridge, Howard; Simpson, David; Tuovinen, J.-P.

doi:10.1016/s0269-7491(00)00043-9

Cited by 503 publications

(323 citation statements)

References 41 publications

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“…some data that were outside the mean ± 2SD of all measurements at each measurement cycle for each clone, around 10% of the total measurements), all valid g sto and their linked meteorological data were averaged for each clone at each treatment in one measurement cycle, and were used to calibrate the stomatal conductance model. The Jarvis-type multiplicative stomatal conductance model was applied (Emberson et al, 2000a;Jarvis, 1976;LRTAP Convention, 2010). It includes mathematical functions for phenology (f phen ), photosynthetically photon flux density (f PPFD ), water vapor pressure deficit (f VPD ), temperature (f temp ), soil water potential (f SWP ) and O 3 (f O3 ).…”

Section: Stomatal Conductance Measurements and Modelingmentioning

confidence: 99%

Concentration- and flux-based ozone dose–response relationships for five poplar clones grown in North China

Dearn

Gao

Yue

et al. 2015

Environmental Pollution

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a b s t r a c tConcentration-and flux-based O 3 doseeresponse relationships were developed for poplars in China. Stomatal conductance (g s ) of five poplar clones was measured to parameterize a Jarvis-type multiplicative g s model. The maximum g s and other model parameters varied between clones. The strongest relationship between stomatal O 3 flux and total biomass was obtained when phytotoxic ozone dose (POD) was integrated using an uptake rate threshold of 7 nmol m À2 s À1 . The R 2 value was similar between flux-based and concentration-based doseeresponse relationships. Ozone concentrations above 28 e36 nmol mol À1 contributed to reducing the biomass production of poplar. Critical levels of AOT 40 (accumulated O 3 exposure over 40 nmol mol À1 ) and POD 7 in relation to 5% reduction in total biomass for poplar were 12 mmol mol À1 h and 3.8 mmol m À2 , respectively.

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Section: Stomatal Conductance Measurements and Modelingmentioning

confidence: 99%

Concentration- and flux-based ozone dose–response relationships for five poplar clones grown in North China

Dearn

Gao

Yue

et al. 2015

Environmental Pollution

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“…Stomatal O 3 flux was estimated from stomatal conductance to water vapor (g s ), employing the water vapor surrogate method (Emberson et al, 2000;Hoshika et al, 2012b,c). This method assumes the O 3 concentration inside leaves to be close to zero (Laisk et al, 1989;Omasa et al, 2002).…”

Section: Stomatal Ozone Fluxmentioning

confidence: 99%

Determinants of stomatal sluggishness in ozone-exposed deciduous tree species

Hoshika

Carriero

Zhu

et al. 2014

Science of The Total Environment

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• Our knowledge of ozone (O 3 ) effects on dynamic stomatal response is still limited.• Determinants of O 3 -induced stomatal sluggishness were examined in deciduous tree species in open-top chambers.• Ozone exposure slowed closing of stomata after leaf cutting.• Stomatal sluggishness was well explained by stomatal O 3 flux per net photosynthesis.• Stomatal sluggishness depended both on ozone flux and on the capacity for detoxification or repair. a b s t r a c t a r t i c l e i n f o Our knowledge of ozone effects on dynamic stomatal response is still limited, especially in Asian tree species. We thus examined ozone effects on steady-state leaf gas exchange and stomatal dynamics in three common tree species of China (Ailanthus altissima, Fraxinus chinensis and Platanus orientalis). Seedlings were grown and were exposed to three levels of ozone in open-top chambers (42, 69, 100 nmol mol −1 daylight average, from 09:00 to 18:00). At steady-state, ozone exposure induced an uncoupling of photosynthesis and stomatal conductance, as the former decreased while the latter did not. Dynamic stomatal response was investigated by cutting the leaf petiole after a steady-state stomatal conductance was reached. Ozone exposure increased stomatal sluggishness, i.e., slowed stomatal response after leaf cutting, in the following order of sensitivity, F. chinensis N A. altissima N P. orientalis. A restriction of stomatal ozone flux reduced the ozone-induced sluggishness in P. orientalis. The ozone-induced impairment of stomatal control was better explained by stomatal ozone flux per net photosynthesis rather than by stomatal ozone flux only. This suggests that ozone injury to stomatal control depends both on the amount of ozone entering a leaf and on the capacity for biochemical detoxification or repair. Leaf mass per area and the density of stomata did not affect stomatal sluggishness.

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“…soil and cuticular) pathways. The processes governing each deposition pathways are well identified: stomatal deposition is linked with environmental parameters governing stomatal opening (Emberson et al, 2000a), cuticular deposition increases with relative humidity (Zhang et al, 2002;Altimir et al, 2004Altimir et al, , 2006Lamaud et al, 2009) and soil deposition decreases with relative humidity . Moreover, the partitioning between stomatal, cuticular and soil depositions depends on canopy structure: the ozone transfer from the atmosphere towards the ground is reduced when the canopy height and the leaf area index (LAI) increase (van Pul and Jacobs, 1994;Zhang et al, 2002), while stomatal and cuticular depositions increase with canopy LAI (Zhang et al, 2002;Massman, 2004;Tuovinen et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Predicting and partitioning ozone fluxes to maize crops from sowing to harvest: the Surfatm-O<sub>3</sub> model

et al. 2011

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Abstract. Terrestrial ecosystems represent a major sink for ozone (O 3 ) and also a critical control of tropospheric O 3 budget. However, due to its deleterious effects, plant functioning is affected by the ozone absorbed. It is thus necessary to both predict total ozone deposition to ecosystems and partition the fluxes in stomatal and non-stomatal pathways. The Surfatm-O 3 model was developed to predict ozone deposition to agroecosystems from sowing to harvest, taking into account each deposition pathways during bare soil, growth, maturity, and senescence periods. An additional sink was added during senescence: stomatal deposition for yellow leaves, not able to photosynthesise but transpiring. The model was confronted to measurements performed over three maize crops in different regions of France. Modelled and measured fluxes agreed well for one dataset for any phenological stage, with only 4 % difference over the whole cropping season. A larger discrepancy was found for the two other sites, 15 % and 18 % over the entire study period, especially during bare soil, early growth and senescence. This was attributed to site-specific soil resistance to ozone and possible chemical reactions between ozone and volatile organic compounds emitted during late senescence. Considering both night-time and daytime conditions, non-stomatal deposition was the major ozone sink, from 100 % during bare soil period to 70-80 % on average during maturity. However, considering only daytime conditions, especially under optimal climatic conditions for plant functioning, stomatal flux could represent 75 % of total ozone flux. This model could improve estimates of crop yield losses and projections of tropospheric ozone budget.

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Modelling stomatal ozone flux across Europe

Cited by 503 publications

References 41 publications

Concentration- and flux-based ozone dose–response relationships for five poplar clones grown in North China

Concentration- and flux-based ozone dose–response relationships for five poplar clones grown in North China

Determinants of stomatal sluggishness in ozone-exposed deciduous tree species

Predicting and partitioning ozone fluxes to maize crops from sowing to harvest: the Surfatm-O<sub>3</sub> model

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Modelling stomatal ozone flux across Europe

Cited by 503 publications

References 41 publications

Concentration- and flux-based ozone dose–response relationships for five poplar clones grown in North China

Concentration- and flux-based ozone dose–response relationships for five poplar clones grown in North China

Determinants of stomatal sluggishness in ozone-exposed deciduous tree species

Predicting and partitioning ozone fluxes to maize crops from sowing to harvest: the Surfatm-O&lt;sub&gt;3&lt;/sub&gt; model

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Predicting and partitioning ozone fluxes to maize crops from sowing to harvest: the Surfatm-O<sub>3</sub> model