Modeling lightning-NO<sub><i>x</i></sub> chemistry on a sub-grid scale in a global chemical transport model
For the first time, a plume-in-grid approach is implemented in a chemical transport model (CTM) to parameterize the effects of the nonlinear reactions occurring within high concentrated NO<sub><i>x</i></sub> plumes from lightning NO<sub><i>x</i></sub>...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2016-05-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/16/5867/2016/acp-16-5867-2016.pdf |
| _version_ | 1817981183428919296 |
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| author | A. Gressent B. Sauvage D. Cariolle D. Cariolle M. Evans M. Leriche C. Mari V. Thouret |
| author_facet | A. Gressent B. Sauvage D. Cariolle D. Cariolle M. Evans M. Leriche C. Mari V. Thouret |
| author_sort | A. Gressent |
| collection | DOAJ |
| description | For the first time, a plume-in-grid approach is implemented in a chemical
transport model (CTM) to parameterize the effects of the nonlinear reactions
occurring within high concentrated NO<sub><i>x</i></sub> plumes from lightning NO<sub><i>x</i></sub>
emissions (LNO<sub><i>x</i></sub>) in the upper troposphere. It is characterized by a set
of parameters including the plume lifetime, the effective reaction rate
constant related to NO<sub><i>x</i></sub>–O<sub>3</sub> chemical interactions, and the
fractions of NO<sub><i>x</i></sub> conversion into HNO<sub>3</sub> within the plume. Parameter
estimates were made using the Dynamical Simple Model of Atmospheric Chemical
Complexity (DSMACC) box model, simple plume dispersion simulations, and the
3-D Meso-NH (non-hydrostatic mesoscale atmospheric model). In order to
assess the impact of the LNO<sub><i>x</i></sub> plume approach on the NO<sub><i>x</i></sub> and O<sub>3</sub>
distributions on a large scale, simulations for the year 2006 were
performed using the GEOS-Chem global model with a horizontal resolution of
2° × 2.5°. The implementation of the LNO<sub><i>x</i></sub>
parameterization implies an NO<sub><i>x</i></sub> and O<sub>3</sub> decrease on a large scale
over the region characterized by a strong lightning activity (up to 25 and
8 %, respectively, over central Africa in July) and a relative increase
downwind of LNO<sub><i>x</i></sub> emissions (up to 18 and 2 % for NO<sub><i>x</i></sub> and
O<sub>3</sub>, respectively, in July). The calculated variability in NO<sub><i>x</i></sub> and
O<sub>3</sub> mixing ratios around the mean value according to the known
uncertainties in the parameter estimates is at a maximum over continental
tropical regions with ΔNO<sub><i>x</i></sub> [−33.1, +29.7] ppt and
ΔO<sub>3</sub> [−1.56, +2.16] ppb, in January, and ΔNO<sub><i>x</i></sub> [−14.3, +21] ppt and ΔO<sub>3</sub> [−1.18,
+1.93] ppb, in July, mainly depending on the determination of the
diffusion properties of the atmosphere and the initial NO mixing ratio
injected by lightning. This approach allows us (i) to reproduce a more
realistic lightning NO<sub><i>x</i></sub> chemistry leading to better NO<sub><i>x</i></sub> and O<sub>3</sub>
distributions on the large scale and (ii) to focus on other improvements to
reduce remaining uncertainties from processes related to NO<sub><i>x</i></sub> chemistry
in CTM. |
| first_indexed | 2024-04-13T23:02:33Z |
| format | Article |
| id | doaj.art-1ead1c0dfd0d4c6a9a73962ce71fe1ae |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-04-13T23:02:33Z |
| publishDate | 2016-05-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-1ead1c0dfd0d4c6a9a73962ce71fe1ae2022-12-22T02:25:46ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242016-05-01165867588910.5194/acp-16-5867-2016Modeling lightning-NO<sub><i>x</i></sub> chemistry on a sub-grid scale in a global chemical transport modelA. Gressent0B. Sauvage1D. Cariolle2D. Cariolle3M. Evans4M. Leriche5C. Mari6V. Thouret7LA, CNRS, Université de Toulouse, Toulouse, FranceLA, CNRS, Université de Toulouse, Toulouse, FranceMétéo France, Toulouse, FranceCentre Européen de Recherche et de Formation Avancée en Calcul Scientifique, CERFACS, Toulouse, FranceThe Wolfson Atmospheric Chemistry Laboratories, University of York, York, UKLA, CNRS, Université de Toulouse, Toulouse, FranceLA, CNRS, Université de Toulouse, Toulouse, FranceLA, CNRS, Université de Toulouse, Toulouse, FranceFor the first time, a plume-in-grid approach is implemented in a chemical transport model (CTM) to parameterize the effects of the nonlinear reactions occurring within high concentrated NO<sub><i>x</i></sub> plumes from lightning NO<sub><i>x</i></sub> emissions (LNO<sub><i>x</i></sub>) in the upper troposphere. It is characterized by a set of parameters including the plume lifetime, the effective reaction rate constant related to NO<sub><i>x</i></sub>–O<sub>3</sub> chemical interactions, and the fractions of NO<sub><i>x</i></sub> conversion into HNO<sub>3</sub> within the plume. Parameter estimates were made using the Dynamical Simple Model of Atmospheric Chemical Complexity (DSMACC) box model, simple plume dispersion simulations, and the 3-D Meso-NH (non-hydrostatic mesoscale atmospheric model). In order to assess the impact of the LNO<sub><i>x</i></sub> plume approach on the NO<sub><i>x</i></sub> and O<sub>3</sub> distributions on a large scale, simulations for the year 2006 were performed using the GEOS-Chem global model with a horizontal resolution of 2° × 2.5°. The implementation of the LNO<sub><i>x</i></sub> parameterization implies an NO<sub><i>x</i></sub> and O<sub>3</sub> decrease on a large scale over the region characterized by a strong lightning activity (up to 25 and 8 %, respectively, over central Africa in July) and a relative increase downwind of LNO<sub><i>x</i></sub> emissions (up to 18 and 2 % for NO<sub><i>x</i></sub> and O<sub>3</sub>, respectively, in July). The calculated variability in NO<sub><i>x</i></sub> and O<sub>3</sub> mixing ratios around the mean value according to the known uncertainties in the parameter estimates is at a maximum over continental tropical regions with ΔNO<sub><i>x</i></sub> [−33.1, +29.7] ppt and ΔO<sub>3</sub> [−1.56, +2.16] ppb, in January, and ΔNO<sub><i>x</i></sub> [−14.3, +21] ppt and ΔO<sub>3</sub> [−1.18, +1.93] ppb, in July, mainly depending on the determination of the diffusion properties of the atmosphere and the initial NO mixing ratio injected by lightning. This approach allows us (i) to reproduce a more realistic lightning NO<sub><i>x</i></sub> chemistry leading to better NO<sub><i>x</i></sub> and O<sub>3</sub> distributions on the large scale and (ii) to focus on other improvements to reduce remaining uncertainties from processes related to NO<sub><i>x</i></sub> chemistry in CTM.https://www.atmos-chem-phys.net/16/5867/2016/acp-16-5867-2016.pdf |
| spellingShingle | A. Gressent B. Sauvage D. Cariolle D. Cariolle M. Evans M. Leriche C. Mari V. Thouret Modeling lightning-NO<sub><i>x</i></sub> chemistry on a sub-grid scale in a global chemical transport model Atmospheric Chemistry and Physics |
| title | Modeling lightning-NO<sub><i>x</i></sub> chemistry on a sub-grid scale in a global chemical transport model |
| title_full | Modeling lightning-NO<sub><i>x</i></sub> chemistry on a sub-grid scale in a global chemical transport model |
| title_fullStr | Modeling lightning-NO<sub><i>x</i></sub> chemistry on a sub-grid scale in a global chemical transport model |
| title_full_unstemmed | Modeling lightning-NO<sub><i>x</i></sub> chemistry on a sub-grid scale in a global chemical transport model |
| title_short | Modeling lightning-NO<sub><i>x</i></sub> chemistry on a sub-grid scale in a global chemical transport model |
| title_sort | modeling lightning no sub i x i sub chemistry on a sub grid scale in a global chemical transport model |
| url | https://www.atmos-chem-phys.net/16/5867/2016/acp-16-5867-2016.pdf |
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