Impact of the COVID-19 pandemic related to lockdown measures on tropospheric NO<sub>2</sub> columns over Île-de-France
<p>The evolution of NO<span class="inline-formula"><sub>2</sub></span>, considered as a proxy for air pollution, was analyzed to evaluate the impact of the first lockdown (17 March–10 May 2020) over the Île-de-France region (Paris and surroundings). Tropospher...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2021-12-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/21/18303/2021/acp-21-18303-2021.pdf |
| _version_ | 1819238797273989120 |
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| author | A. Pazmiño M. Beekmann F. Goutail D. Ionov A. Bazureau M. Nunes-Pinharanda A. Hauchecorne S. Godin-Beekmann |
| author_facet | A. Pazmiño M. Beekmann F. Goutail D. Ionov A. Bazureau M. Nunes-Pinharanda A. Hauchecorne S. Godin-Beekmann |
| author_sort | A. Pazmiño |
| collection | DOAJ |
| description | <p>The evolution of NO<span class="inline-formula"><sub>2</sub></span>, considered as a proxy for air
pollution, was analyzed to evaluate the impact of the first lockdown (17 March–10 May 2020) over the Île-de-France region (Paris and surroundings). Tropospheric NO<span class="inline-formula"><sub>2</sub></span> columns measured by two UV-Visible Système d'Analyse par Observation Zénithale (SAOZ) spectrometers were analyzed to compare the evolution of NO<span class="inline-formula"><sub>2</sub></span> between
urban and suburban sites during the lockdown. The urban site is the
observation platform QualAir (48<span class="inline-formula"><sup>∘</sup></span>50<span class="inline-formula"><sup>′</sup></span> N / 2<span class="inline-formula"><sup>∘</sup></span>21<span class="inline-formula"><sup>′</sup></span> E) at the Sorbonne University Pierre and Marie Curie Campus in the center of Paris. The suburban site is located at Guyancourt (48<span class="inline-formula"><sup>∘</sup></span>46<span class="inline-formula"><sup>′</sup></span>N / 2<span class="inline-formula"><sup>∘</sup></span>03<span class="inline-formula"><sup>′</sup></span>E), Versailles Saint-Quentin-en-Yvelines University, 24 km southwest of Paris. Tropospheric NO<span class="inline-formula"><sub>2</sub></span> columns above Paris and Guyancourt have shown similar
values during the whole lockdown period from March to May 2020. A decade of data sets were filtered to consider air masses at both sites with similar meteorological conditions. The median NO<span class="inline-formula"><sub>2</sub></span> columns and the surface measurements of Airparif (Air Quality Observatory in Île de France)
during the lockdown period in 2020 were compared to the extrapolated values
estimated from a linear trend analysis for the 2011–2019 period at each
station. Negative NO<span class="inline-formula"><sub>2</sub></span> trends of <span class="inline-formula">−</span>1.5 Pmolec. cm<span class="inline-formula"><sup>−2</sup></span> yr<span class="inline-formula"><sup>−1</sup></span>
(<span class="inline-formula">∼</span> <span class="inline-formula">−</span>6.3 % yr<span class="inline-formula"><sup>−1</sup>)</span> are observed from the columns, and trends of <span class="inline-formula">−2.2</span> <span class="inline-formula">µg</span> m<span class="inline-formula"><sup>−3</sup></span> yr<span class="inline-formula"><sup>−1</sup></span> (<span class="inline-formula">∼</span> <span class="inline-formula">−</span>3.6 % yr<span class="inline-formula"><sup>−1</sup>)</span> are observed from the surface concentration.</p>
<p>The negative anomaly in tropospheric columns in 2020 attributed to the lockdown (and related emission reductions) was found to be 56 % at Paris and 46 % at Guyancourt, respectively. A similar anomaly was found in the data of surface concentrations, amounting to 53 % and 28 % at the urban and suburban sites, accordingly.</p> |
| first_indexed | 2024-12-23T13:41:56Z |
| format | Article |
| id | doaj.art-ccc47e3f4e7843cbbacf241c1b96426d |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-23T13:41:56Z |
| publishDate | 2021-12-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-ccc47e3f4e7843cbbacf241c1b96426d2022-12-21T17:44:49ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242021-12-0121183031831710.5194/acp-21-18303-2021Impact of the COVID-19 pandemic related to lockdown measures on tropospheric NO<sub>2</sub> columns over Île-de-FranceA. Pazmiño0M. Beekmann1F. Goutail2D. Ionov3A. Bazureau4M. Nunes-Pinharanda5A. Hauchecorne6S. Godin-Beekmann7LATMOS/IPSL, UVSQ, Université Paris-Saclay, Sorbonne Université, CNRS, Guyancourt, FranceLISA/IPSL, UMR CNRS 7583, Université Paris Est Créteil, Université de Paris, Créteil, FranceLATMOS/IPSL, UVSQ, Université Paris-Saclay, Sorbonne Université, CNRS, Guyancourt, FranceDepartment of Atmospheric Physics, University of Saint Petersburg, Saint Petersburg, RussiaLATMOS/IPSL, UVSQ, Université Paris-Saclay, Sorbonne Université, CNRS, Guyancourt, FranceLATMOS/IPSL, UVSQ, Université Paris-Saclay, Sorbonne Université, CNRS, Guyancourt, FranceLATMOS/IPSL, UVSQ, Université Paris-Saclay, Sorbonne Université, CNRS, Guyancourt, FranceLATMOS/IPSL, UVSQ, Université Paris-Saclay, Sorbonne Université, CNRS, Guyancourt, France<p>The evolution of NO<span class="inline-formula"><sub>2</sub></span>, considered as a proxy for air pollution, was analyzed to evaluate the impact of the first lockdown (17 March–10 May 2020) over the Île-de-France region (Paris and surroundings). Tropospheric NO<span class="inline-formula"><sub>2</sub></span> columns measured by two UV-Visible Système d'Analyse par Observation Zénithale (SAOZ) spectrometers were analyzed to compare the evolution of NO<span class="inline-formula"><sub>2</sub></span> between urban and suburban sites during the lockdown. The urban site is the observation platform QualAir (48<span class="inline-formula"><sup>∘</sup></span>50<span class="inline-formula"><sup>′</sup></span> N / 2<span class="inline-formula"><sup>∘</sup></span>21<span class="inline-formula"><sup>′</sup></span> E) at the Sorbonne University Pierre and Marie Curie Campus in the center of Paris. The suburban site is located at Guyancourt (48<span class="inline-formula"><sup>∘</sup></span>46<span class="inline-formula"><sup>′</sup></span>N / 2<span class="inline-formula"><sup>∘</sup></span>03<span class="inline-formula"><sup>′</sup></span>E), Versailles Saint-Quentin-en-Yvelines University, 24 km southwest of Paris. Tropospheric NO<span class="inline-formula"><sub>2</sub></span> columns above Paris and Guyancourt have shown similar values during the whole lockdown period from March to May 2020. A decade of data sets were filtered to consider air masses at both sites with similar meteorological conditions. The median NO<span class="inline-formula"><sub>2</sub></span> columns and the surface measurements of Airparif (Air Quality Observatory in Île de France) during the lockdown period in 2020 were compared to the extrapolated values estimated from a linear trend analysis for the 2011–2019 period at each station. Negative NO<span class="inline-formula"><sub>2</sub></span> trends of <span class="inline-formula">−</span>1.5 Pmolec. cm<span class="inline-formula"><sup>−2</sup></span> yr<span class="inline-formula"><sup>−1</sup></span> (<span class="inline-formula">∼</span> <span class="inline-formula">−</span>6.3 % yr<span class="inline-formula"><sup>−1</sup>)</span> are observed from the columns, and trends of <span class="inline-formula">−2.2</span> <span class="inline-formula">µg</span> m<span class="inline-formula"><sup>−3</sup></span> yr<span class="inline-formula"><sup>−1</sup></span> (<span class="inline-formula">∼</span> <span class="inline-formula">−</span>3.6 % yr<span class="inline-formula"><sup>−1</sup>)</span> are observed from the surface concentration.</p> <p>The negative anomaly in tropospheric columns in 2020 attributed to the lockdown (and related emission reductions) was found to be 56 % at Paris and 46 % at Guyancourt, respectively. A similar anomaly was found in the data of surface concentrations, amounting to 53 % and 28 % at the urban and suburban sites, accordingly.</p>https://acp.copernicus.org/articles/21/18303/2021/acp-21-18303-2021.pdf |
| spellingShingle | A. Pazmiño M. Beekmann F. Goutail D. Ionov A. Bazureau M. Nunes-Pinharanda A. Hauchecorne S. Godin-Beekmann Impact of the COVID-19 pandemic related to lockdown measures on tropospheric NO<sub>2</sub> columns over Île-de-France Atmospheric Chemistry and Physics |
| title | Impact of the COVID-19 pandemic related to lockdown measures on tropospheric NO<sub>2</sub> columns over Île-de-France |
| title_full | Impact of the COVID-19 pandemic related to lockdown measures on tropospheric NO<sub>2</sub> columns over Île-de-France |
| title_fullStr | Impact of the COVID-19 pandemic related to lockdown measures on tropospheric NO<sub>2</sub> columns over Île-de-France |
| title_full_unstemmed | Impact of the COVID-19 pandemic related to lockdown measures on tropospheric NO<sub>2</sub> columns over Île-de-France |
| title_short | Impact of the COVID-19 pandemic related to lockdown measures on tropospheric NO<sub>2</sub> columns over Île-de-France |
| title_sort | impact of the covid 19 pandemic related to lockdown measures on tropospheric no sub 2 sub columns over ile de france |
| url | https://acp.copernicus.org/articles/21/18303/2021/acp-21-18303-2021.pdf |
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