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Simpson, David; Tuovinen, Juha‐Pekka; Emberson, Lisa; Ashmore, Mike

doi:10.1023/a:1022890603066

Cited by 63 publications

(25 citation statements)

References 14 publications

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“…For all analysis, 24h mean ozone concentration was chosen as the input parameter to avoid uncertainty associated with use of a threshold concentration (e.g. 40 in AOT40, see Simpson et al, 2007), night-time as well as daytime ozone is included, and previous publications of results from these studies have indicated a linear relationship with this parameter and biological effects on grassland (e.g. Hayes et al, 2011, Hewitt et al, 2014.…”

Section: Plant Materials and Ozone Exposurementioning

confidence: 99%

Consistent ozone-induced decreases in pasture forage quality across several grassland types and consequences for UK lamb production

Hayes

Mills

Jones

et al. 2016

Science of The Total Environment

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Section: Plant Materials and Ozone Exposurementioning

confidence: 99%

Consistent ozone-induced decreases in pasture forage quality across several grassland types and consequences for UK lamb production

Hayes

Mills

Jones

et al. 2016

Science of The Total Environment

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“…Dry deposition is parameterized similar to the EMEP model (Simpson et al, 2003b;Emberson, 2000) except for the dry deposition of species on water surfaces where the deposition depends on the solubility of the chemical specie and the wind speed (Asman et al, 1994;Hertel et al, 1995). Wet deposition includes in-cloud and below-cloud scavenging and is calculated as the product of scavenging coefficients and the concentration.…”

Section: The Dehm Modelmentioning

confidence: 99%

A multi-model study of impacts of climate change on surface ozone in Europe

et al. 2012

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Abstract. The impact of climate change on surface ozone over Europe was studied using four offline regional chemistry transport models (CTMs) and one online regional integrated climate-chemistry model (CCM), driven by the same global projection of future climate under the SRES A1B scenario. Anthropogenic emissions of ozone precursors from RCP4.5 for year 2000 were used for simulations of both present and future periods in order to isolate the impact of climate change and to assess the robustness of the results across the different models. The sensitivity of the simulated surface ozone to changes in climate between the periods 2000-2009 and 2040-2049 differs by a factor of two between the models, but the general pattern of change with an increase in southern Europe is similar across different models. Emissions of isoprene differ substantially between different CTMs ranging from 1.6 to 8.0 Tg yr −1 for the current climate, partly due to differences in horizontal resolution of meteorological input data. Also the simulated change in total isoprene emissions varies substantially across models explaining part of the different climate response on surface ozone. Ensemble mean changes in summer mean ozone and mean of daily maximum ozone are close to 1 ppb(v) in parts of the land area in southern Europe. Corresponding changes of 95-percentiles of hourly ozone are close to 2 ppb(v) in the same region. In northern Europe ensemble mean for mean and daily maximum show negative changes while there are no negative changes for the higher percentiles indicating that climate impacts on O 3 could be especially important in connection with extreme summer events.

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“…We will refer to this parameterization as Wesely scheme. 30 Regarding the new dry deposition scheme, we follow the European Monitoring and Evaluation Programme (EMEP) MSC-W model (Simpson et al, 2003(Simpson et al, , 2012, which is used for air quality modeling implementing the Convention on Long-Range Transboundary Air Pollution (CLRTAP). We will refer to this as EMEP scheme throughout the rest of the paper.…”

Section: Ozone Dry Deposition Schemementioning

confidence: 99%

Update and evaluation of the ozone dry deposition in the Oslo CTM3 v1.0

Falk¹,

Haslerud²

2019

Preprint

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High concentrations of ozone in ambient air are hazardous not only to humans but to the ecosystem in general. The impact of ozone damage on vegetation and agricultural plants in combination with advancing climate change may affect food security in the future. While the future scenarios in themselves are uncertain, there are limiting factors constraining the accuracy of surface ozone modeling also at present: The distribution and amount of ozone precursors and ozone depleting substances, the stratosphere-troposphere exchange as well as scavenging processes. Removal of any substance through gravitational settling or 5 by uptake by plants and soil is referred to as dry deposition. The process of dry deposition is important for predicting surface ozone concentrations and understanding the observed amount and increase of tropospheric background ozone. The conceptual dry deposition velocities are calculated following a resistance-analogous approach wherein aerodynamic, quasi laminar, and canopy resistances are key components, but these are hard to measure explicitly. In this paper, we present an update of the dry deposition scheme implemented in the Oslo CTM3. We change from a purely empirical dry deposition parameterization to 10 a more process-based one which is taking the state of the atmosphere and vegetation into account. Examining the sensitivity of the scheme to various parameters, our focus lies mainly on the stomatal conductance-based description of the canopy resistance. We evaluate the resulting modeled ozone dry deposition with respect to observations and multi-model studies and also estimate the impact on the modeled ozone concentrations at the surface. We show that the global annual total ozone dry deposition decreases with respect to the previous model version (−47 %), leading to an increase in surface ozone of up to 15 100 %. While high sensitivity to changes in dry deposition to vegetation is found in the tropics, the largest impact on global scales is associated to changes in dry deposition to the ocean and deserts.Geosci. Model Dev. Discuss., https://doi.

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Untitled

Cited by 63 publications

References 14 publications

Consistent ozone-induced decreases in pasture forage quality across several grassland types and consequences for UK lamb production

Consistent ozone-induced decreases in pasture forage quality across several grassland types and consequences for UK lamb production

A multi-model study of impacts of climate change on surface ozone in Europe

Update and evaluation of the ozone dry deposition in the Oslo CTM3 v1.0

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