Exploiting satellite measurements to explore uncertainties in UK bottom-up NO<sub><i>x</i></sub> emission estimates
<p>Nitrogen oxides (NO<span class="inline-formula"><sub><i>x</i></sub></span>, NO <span class="inline-formula">+</span> NO<span class="inline-formula"><sub>2</sub></span>) are potent air pollu...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-04-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/22/4323/2022/acp-22-4323-2022.pdf |
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| author | R. J. Pope R. J. Pope R. Kelly E. A. Marais A. M. Graham C. Wilson C. Wilson J. J. Harrison J. J. Harrison S. J. A. Moniz M. Ghalaieny S. R. Arnold M. P. Chipperfield M. P. Chipperfield |
| author_facet | R. J. Pope R. J. Pope R. Kelly E. A. Marais A. M. Graham C. Wilson C. Wilson J. J. Harrison J. J. Harrison S. J. A. Moniz M. Ghalaieny S. R. Arnold M. P. Chipperfield M. P. Chipperfield |
| author_sort | R. J. Pope |
| collection | DOAJ |
| description | <p>Nitrogen oxides (NO<span class="inline-formula"><sub><i>x</i></sub></span>, NO <span class="inline-formula">+</span> NO<span class="inline-formula"><sub>2</sub></span>) are potent air pollutants which
directly impact on human health and which aid the formation of other
hazardous pollutants such as ozone (O<span class="inline-formula"><sub>3</sub></span>) and particulate matter. In this
study, we use satellite tropospheric column nitrogen dioxide (TCNO<span class="inline-formula"><sub>2</sub></span>)
data to evaluate the spatiotemporal variability and magnitude of the United
Kingdom (UK) bottom-up National Atmospheric Emissions Inventory (NAEI)
NO<span class="inline-formula"><sub><i>x</i></sub></span> emissions. Although emissions and TCNO<span class="inline-formula"><sub>2</sub></span> represent different
quantities, for UK city sources we find a spatial correlation of
<span class="inline-formula">∼0.5</span> between the NAEI NO<span class="inline-formula"><sub><i>x</i></sub></span> emissions and TCNO<span class="inline-formula"><sub>2</sub></span> from
the high-spatial-resolution TROPOspheric Monitoring Instrument (TROPOMI),
suggesting a good spatial distribution of emission sources in the inventory.
Between 2005 and 2015, the NAEI total UK NO<span class="inline-formula"><sub><i>x</i></sub></span> emissions and long-term
TCNO<span class="inline-formula"><sub>2</sub></span> record from the Ozone Monitoring Instrument (OMI), averaged over
England, show annually decreasing trends of 4.4 % and 2.2 %,
respectively. Top-down NO<span class="inline-formula"><sub><i>x</i></sub></span> emissions were derived in this study by
applying a simple mass balance approach to TROPOMI-observed downwind NO<span class="inline-formula"><sub>2</sub></span> plumes from city sources. Overall, these top-down estimates were
consistent with the NAEI, but for larger cities such as London and
Birmingham the inventory is significantly (<span class="inline-formula">>25</span> %) less than
the top-down emissions.</p> |
| first_indexed | 2024-04-13T10:22:56Z |
| format | Article |
| id | doaj.art-6670373713ee4cf09064a9c736d90f7a |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-04-13T10:22:56Z |
| publishDate | 2022-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-6670373713ee4cf09064a9c736d90f7a2022-12-22T02:50:26ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242022-04-01224323433810.5194/acp-22-4323-2022Exploiting satellite measurements to explore uncertainties in UK bottom-up NO<sub><i>x</i></sub> emission estimatesR. J. Pope0R. J. Pope1R. Kelly2E. A. Marais3A. M. Graham4C. Wilson5C. Wilson6J. J. Harrison7J. J. Harrison8S. J. A. Moniz9M. Ghalaieny10S. R. Arnold11M. P. Chipperfield12M. P. Chipperfield13School of Earth and Environment, University of Leeds, Leeds, UKNational Centre for Earth Observation, University of Leeds, Leeds, UKSchool of Earth and Environment, University of Leeds, Leeds, UKDepartment of Geography, University College London, London, UKSchool of Earth and Environment, University of Leeds, Leeds, UKSchool of Earth and Environment, University of Leeds, Leeds, UKNational Centre for Earth Observation, University of Leeds, Leeds, UKDepartment of Physics and Astronomy, University of Leicester, Leicester, UKNational Centre for Earth Observation, University of Leicester, Leicester, UKDepartment for Environment, Food and Rural Affairs, 2 Marsham Street, London, UKDepartment for Environment, Food and Rural Affairs, 2 Marsham Street, London, UKSchool of Earth and Environment, University of Leeds, Leeds, UKSchool of Earth and Environment, University of Leeds, Leeds, UKNational Centre for Earth Observation, University of Leeds, Leeds, UK<p>Nitrogen oxides (NO<span class="inline-formula"><sub><i>x</i></sub></span>, NO <span class="inline-formula">+</span> NO<span class="inline-formula"><sub>2</sub></span>) are potent air pollutants which directly impact on human health and which aid the formation of other hazardous pollutants such as ozone (O<span class="inline-formula"><sub>3</sub></span>) and particulate matter. In this study, we use satellite tropospheric column nitrogen dioxide (TCNO<span class="inline-formula"><sub>2</sub></span>) data to evaluate the spatiotemporal variability and magnitude of the United Kingdom (UK) bottom-up National Atmospheric Emissions Inventory (NAEI) NO<span class="inline-formula"><sub><i>x</i></sub></span> emissions. Although emissions and TCNO<span class="inline-formula"><sub>2</sub></span> represent different quantities, for UK city sources we find a spatial correlation of <span class="inline-formula">∼0.5</span> between the NAEI NO<span class="inline-formula"><sub><i>x</i></sub></span> emissions and TCNO<span class="inline-formula"><sub>2</sub></span> from the high-spatial-resolution TROPOspheric Monitoring Instrument (TROPOMI), suggesting a good spatial distribution of emission sources in the inventory. Between 2005 and 2015, the NAEI total UK NO<span class="inline-formula"><sub><i>x</i></sub></span> emissions and long-term TCNO<span class="inline-formula"><sub>2</sub></span> record from the Ozone Monitoring Instrument (OMI), averaged over England, show annually decreasing trends of 4.4 % and 2.2 %, respectively. Top-down NO<span class="inline-formula"><sub><i>x</i></sub></span> emissions were derived in this study by applying a simple mass balance approach to TROPOMI-observed downwind NO<span class="inline-formula"><sub>2</sub></span> plumes from city sources. Overall, these top-down estimates were consistent with the NAEI, but for larger cities such as London and Birmingham the inventory is significantly (<span class="inline-formula">>25</span> %) less than the top-down emissions.</p>https://acp.copernicus.org/articles/22/4323/2022/acp-22-4323-2022.pdf |
| spellingShingle | R. J. Pope R. J. Pope R. Kelly E. A. Marais A. M. Graham C. Wilson C. Wilson J. J. Harrison J. J. Harrison S. J. A. Moniz M. Ghalaieny S. R. Arnold M. P. Chipperfield M. P. Chipperfield Exploiting satellite measurements to explore uncertainties in UK bottom-up NO<sub><i>x</i></sub> emission estimates Atmospheric Chemistry and Physics |
| title | Exploiting satellite measurements to explore uncertainties in UK bottom-up NO<sub><i>x</i></sub> emission estimates |
| title_full | Exploiting satellite measurements to explore uncertainties in UK bottom-up NO<sub><i>x</i></sub> emission estimates |
| title_fullStr | Exploiting satellite measurements to explore uncertainties in UK bottom-up NO<sub><i>x</i></sub> emission estimates |
| title_full_unstemmed | Exploiting satellite measurements to explore uncertainties in UK bottom-up NO<sub><i>x</i></sub> emission estimates |
| title_short | Exploiting satellite measurements to explore uncertainties in UK bottom-up NO<sub><i>x</i></sub> emission estimates |
| title_sort | exploiting satellite measurements to explore uncertainties in uk bottom up no sub i x i sub emission estimates |
| url | https://acp.copernicus.org/articles/22/4323/2022/acp-22-4323-2022.pdf |
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