Comparison of spatial patterns of ammonia concentration and dry deposition flux between a regional Eulerian chemistry-transport model and a local Gaussian plume model

Azouz, Niramson; Drouet, Jean-Louis; Beekmann, Matthias; Siour, Guillaume; Kruit, Roy Wichink; Cellier, Pierre

doi:10.1007/s11869-019-00691-y

Cited by 4 publications

(3 citation statements)

References 25 publications

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“…The parameterization of NH 3 dry deposition is unidirectional in CHIMERE. However, Azouz et al [35] assessed that such regional models usually operating with large grid cell sizes simulate the average NH 3 dry deposition flux over a large domain of simulation quite well when comparing to a small-scale Gaussian model with unidirectional deposition.…”

Section: Chemistry Transport Model Chimerev2013bmentioning

confidence: 99%

Understanding the Simulated Ammonia Increasing Trend from 2008 to 2015 over Europe with CHIMERE and Comparison with IASI Observations

et al. 2022

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The objective of this study is to assess and understand the NH3 recent trends and to identify the key components driving its concentrations. We have simulated the seasonal cycle, the interannual variability, and the trends in NH3 vertical column densities (VCD) from 2008 to 2015 over Europe, with the CHIMERE regional chemistry–transport model. We have also confronted the simulations against the Infrared Atmospheric Sounding Interferometer (IASI) satellite observations. IASI often shows a strong maximum in summer in addition to the spring peak, whereas CHIMERE only shows a slight peak in summer some years. This result could point to a misrepresentation of the temporal profile of the NH3 emissions, i.e., to missing emission sources during summertime either due to more than expected fertilizer use or to increased volatilization under warmer conditions. The simulated NH3 VCDs present an increasing trend over continental Europe (+2.7 ± 1.0 %/yr) but also at the national scale for Spain, Germany, UK, France, and Poland. Sensitivity tests indicate that these simulated positive trends are mainly due to (i) the trends in NH3 emissions, found heterogeneous in the EMEP NH3 emissions with strong disparities depending on the country, and (ii) the negative trends in NOx and SOx emissions. The impact of reductions in NO2 and SO2 emissions on NH3 concentrations should therefore be taken into account in future policies. This simulated NH3 VCD increase at the European scale is confirmed by IASI-v3R satellite observations in spring and summer, when ammonia emissions strongly contribute to the annual budget in accordance with crop requirements. Nevertheless, there are remaining differences about the significance and magnitude between the simulated and observed trends at the national scale, and it warrants further investigation.

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Section: Chemistry Transport Model Chimerev2013bmentioning

confidence: 99%

Understanding the Simulated Ammonia Increasing Trend from 2008 to 2015 over Europe with CHIMERE and Comparison with IASI Observations

et al. 2022

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“…For example, in several studies local scale Gaussian plume dispersion models such as ADMS or OPS-ST have been coupled to the coarser scale model to simulate concentration elds along roads and near point sources, including for N r compounds such as NH 3 . 147,148 These approaches use additional information on the source location rather than the receptor sites and they are therefore normally more suited to modelling the concentration and deposition of pollutants that originate from complex line and point sources rather than modelling the deposition to complex terrain. In an alternative approach the grid average concentrations provided by the ACTMs are remapped within a grid cell using land use regression approaches.…”

Section: àmentioning

confidence: 99%

Review of methods for assessing deposition of reactive nitrogen pollutants across complex terrain with focus on the UK

Cowan

Nemitz

Walker

et al. 2022

Environ. Sci.: Atmos.

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“…Further work needs to be done to better investigate the sensitivity of NH 3 concentrations to the deposition. Nevertheless, without such parameterization for bi-directional exchange, Azouz et al (2019) assessed that regional models such as CHIMERE usually operating with large grid cell sizes simulate quite well the average NH 3 dry deposition flux over a large domain of simulation.…”

Section: The Regional Ctm Chimerementioning

confidence: 99%

Do alternative inventories converge on the spatiotemporal representation of spring ammonia emissions in France?

et al. 2020

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Abstract. Agriculture is the main source of ammonia (NH3) in France, an important gaseous precursor of atmospheric particulate matter (PM). National and global emission inventories are known to have difficulty representing the large spatial and temporal variability inherent to atmospheric NH3. In this study, we compare NH3 emissions in France during spring 2011 from one reference inventory, the TNO inventory, and two alternative inventories that account in different manners for both the spatial and temporal variabilities of the emissions: (i) the NH3SAT satellite-derived inventory based on IASI NH3 columns and (ii) the CADASTRE-CIT inventory that combines NH3 emissions due to nitrogen fertilization calculated with the mechanistic model VOLT'AIR on the database of the CADASTRE_NH3 framework and other source emissions from the CITEPA. The total spring budgets, from March to May 2011, at the national level are higher when calculated with both alternative inventories than with the reference, the difference being more marked with CADASTRE-CIT. NH3SAT and CADASTRE-CIT inventories both yield to large NH3 spring emissions due to fertilization on soils with high pH in the northeastern part of France (65 and 135 kt NH3, respectively, vs. 48 kt NH3 for TNO-GEN), while soil properties are not accounted for by the TNO-GEN methodology. For the other parts of France, the differences are smaller. The timing of fertilization and associated ammonia emissions is closely related to the nitrogen requirements and hence the phenological stage of the crops, and therefore to the crop year's specific weather conditions. Maximum emissions are observed in March for 2011 for some regions for both alternative inventories, while April is the period with maximum emissions for the reference inventory regardless of the region or the year. Comparing the inventories at finer temporal resolutions, typically at daily scale, large differences are found. The convergence of alternative, independent and complementary methods on the spatiotemporal representation of the spring NH3 emissions, particularly over areas where the contribution of mineral fertilizer spreading to the spring budget is strong, encourages further developments in both prospective complementary directions, as this will help improve national NH3 emission inventories.

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Comparison of spatial patterns of ammonia concentration and dry deposition flux between a regional Eulerian chemistry-transport model and a local Gaussian plume model

Cited by 4 publications

References 25 publications

Understanding the Simulated Ammonia Increasing Trend from 2008 to 2015 over Europe with CHIMERE and Comparison with IASI Observations

Understanding the Simulated Ammonia Increasing Trend from 2008 to 2015 over Europe with CHIMERE and Comparison with IASI Observations

Review of methods for assessing deposition of reactive nitrogen pollutants across complex terrain with focus on the UK

Do alternative inventories converge on the spatiotemporal representation of spring ammonia emissions in France?

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