Intra-event evolution of elemental and ionic concentrations in wet deposition in an urban environment
<p>A measurement campaign was conducted in the Paris region, focusing on the evolution of chemical composition of wet deposition during rainfall events from sequential sampling. A total of eight rain events were documented and characterized by varying meteorological conditions, atmospheric dyn...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2023-10-01
|
| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/23/13485/2023/acp-23-13485-2023.pdf |
| _version_ | 1827784010550476800 |
|---|---|
| author | T. Audoux B. Laurent K. Desboeufs G. Noyalet F. Maisonneuve O. Lauret O. Lauret S. Chevaillier |
| author_facet | T. Audoux B. Laurent K. Desboeufs G. Noyalet F. Maisonneuve O. Lauret O. Lauret S. Chevaillier |
| author_sort | T. Audoux |
| collection | DOAJ |
| description | <p>A measurement campaign was conducted in the Paris region, focusing on the evolution of chemical composition of wet deposition during rainfall events from sequential sampling. A total of eight rain events were documented and characterized by varying meteorological conditions, atmospheric dynamics, and aerosol particle concentrations representative of urban conditions and influenced by long-range mineral dust transport. The intra-event evolution of the chemical composition of wet deposition revealed the predominant role of meteorological parameters and local sources in the observed mass concentration variability. From selected case studies, the washout ratios (WRs) and scavenging coefficients were quantified by conducting simultaneous measurements of aerosol particle composition and wet deposition. The results highlighted a variability of the WR and scavenging coefficients depending on the rainfall rate and on the chemical species. Scavenging coefficients estimated from WR ranged from <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">5.4</mn><mo>×</mo><msup><mn mathvariant="normal">10</mn><mrow><mo>-</mo><mn mathvariant="normal">8</mn></mrow></msup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="51pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="897de0abc720478665dff2336c6665e6"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-23-13485-2023-ie00001.svg" width="51pt" height="14pt" src="acp-23-13485-2023-ie00001.png"/></svg:svg></span></span> to <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">1.1</mn><mo>×</mo><msup><mn mathvariant="normal">10</mn><mrow><mo>-</mo><mn mathvariant="normal">5</mn></mrow></msup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="51pt" height="13pt" class="svg-formula" dspmath="mathimg" md5hash="21a78412b610691b476920fc11d46031"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-23-13485-2023-ie00002.svg" width="51pt" height="13pt" src="acp-23-13485-2023-ie00002.png"/></svg:svg></span></span> s<span class="inline-formula"><sup>−1</sup></span> for chemical elements, and they are within the range of values reported in the literature for 0.2–2 <span class="inline-formula">µ</span>m particle diameters. Our results pointed out that the scavenging coefficient increases with rainfall rate according to a power law, as previously shown in the literature, indicating a stronger removal of particles from the atmosphere with greater precipitation intensity. Quantitative analysis of the data allowed us to estimate the relative contributions of in-cloud scavenging (ICS) for selected rain events. The ICS relative contributions ranged on average from 23 % to 62 % depending on the rain events, and they varied according to the chemical species within the same rain event. This highlights the variability and complexity of the wet deposition process and the influence of specific factors on the contribution of ICS, such as aerosol particle size and hygroscopicity. Overall, this study highlights the variability of wet deposition and its chemical composition and the need to consider the specificities of each event to fully understand the underlying mechanisms.</p> |
| first_indexed | 2024-03-11T15:56:21Z |
| format | Article |
| id | doaj.art-d5a533c83b2b4b91b1ed2ddae6b13c42 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-03-11T15:56:21Z |
| publishDate | 2023-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-d5a533c83b2b4b91b1ed2ddae6b13c422023-10-25T10:41:14ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242023-10-0123134851350310.5194/acp-23-13485-2023Intra-event evolution of elemental and ionic concentrations in wet deposition in an urban environmentT. Audoux0B. Laurent1K. Desboeufs2G. Noyalet3F. Maisonneuve4O. Lauret5O. Lauret6S. Chevaillier7Université Paris Cité and Université Paris-Est Créteil , CNRS, LISA, 75013, Paris, FranceUniversité Paris Cité and Université Paris-Est Créteil , CNRS, LISA, 75013, Paris, FranceUniversité Paris Cité and Université Paris-Est Créteil , CNRS, LISA, 75013, Paris, FranceUniversité Paris Cité and Université Paris-Est Créteil , CNRS, LISA, 75013, Paris, FranceUniversité Paris-Est Créteil and Université Paris Cité, CNRS, LISA, 94010, Créteil, FranceUniversité Paris-Est Créteil and Université Paris Cité, CNRS, LISA, 94010, Créteil, FranceUniversité Paris-Est Créteil , CNRS, ENPC, Université Paris Cité, OSU-EFLUVE, 94010, Créteil, FranceUniversité Paris-Est Créteil and Université Paris Cité, CNRS, LISA, 94010, Créteil, France<p>A measurement campaign was conducted in the Paris region, focusing on the evolution of chemical composition of wet deposition during rainfall events from sequential sampling. A total of eight rain events were documented and characterized by varying meteorological conditions, atmospheric dynamics, and aerosol particle concentrations representative of urban conditions and influenced by long-range mineral dust transport. The intra-event evolution of the chemical composition of wet deposition revealed the predominant role of meteorological parameters and local sources in the observed mass concentration variability. From selected case studies, the washout ratios (WRs) and scavenging coefficients were quantified by conducting simultaneous measurements of aerosol particle composition and wet deposition. The results highlighted a variability of the WR and scavenging coefficients depending on the rainfall rate and on the chemical species. Scavenging coefficients estimated from WR ranged from <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">5.4</mn><mo>×</mo><msup><mn mathvariant="normal">10</mn><mrow><mo>-</mo><mn mathvariant="normal">8</mn></mrow></msup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="51pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="897de0abc720478665dff2336c6665e6"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-23-13485-2023-ie00001.svg" width="51pt" height="14pt" src="acp-23-13485-2023-ie00001.png"/></svg:svg></span></span> to <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">1.1</mn><mo>×</mo><msup><mn mathvariant="normal">10</mn><mrow><mo>-</mo><mn mathvariant="normal">5</mn></mrow></msup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="51pt" height="13pt" class="svg-formula" dspmath="mathimg" md5hash="21a78412b610691b476920fc11d46031"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-23-13485-2023-ie00002.svg" width="51pt" height="13pt" src="acp-23-13485-2023-ie00002.png"/></svg:svg></span></span> s<span class="inline-formula"><sup>−1</sup></span> for chemical elements, and they are within the range of values reported in the literature for 0.2–2 <span class="inline-formula">µ</span>m particle diameters. Our results pointed out that the scavenging coefficient increases with rainfall rate according to a power law, as previously shown in the literature, indicating a stronger removal of particles from the atmosphere with greater precipitation intensity. Quantitative analysis of the data allowed us to estimate the relative contributions of in-cloud scavenging (ICS) for selected rain events. The ICS relative contributions ranged on average from 23 % to 62 % depending on the rain events, and they varied according to the chemical species within the same rain event. This highlights the variability and complexity of the wet deposition process and the influence of specific factors on the contribution of ICS, such as aerosol particle size and hygroscopicity. Overall, this study highlights the variability of wet deposition and its chemical composition and the need to consider the specificities of each event to fully understand the underlying mechanisms.</p>https://acp.copernicus.org/articles/23/13485/2023/acp-23-13485-2023.pdf |
| spellingShingle | T. Audoux B. Laurent K. Desboeufs G. Noyalet F. Maisonneuve O. Lauret O. Lauret S. Chevaillier Intra-event evolution of elemental and ionic concentrations in wet deposition in an urban environment Atmospheric Chemistry and Physics |
| title | Intra-event evolution of elemental and ionic concentrations in wet deposition in an urban environment |
| title_full | Intra-event evolution of elemental and ionic concentrations in wet deposition in an urban environment |
| title_fullStr | Intra-event evolution of elemental and ionic concentrations in wet deposition in an urban environment |
| title_full_unstemmed | Intra-event evolution of elemental and ionic concentrations in wet deposition in an urban environment |
| title_short | Intra-event evolution of elemental and ionic concentrations in wet deposition in an urban environment |
| title_sort | intra event evolution of elemental and ionic concentrations in wet deposition in an urban environment |
| url | https://acp.copernicus.org/articles/23/13485/2023/acp-23-13485-2023.pdf |
| work_keys_str_mv | AT taudoux intraeventevolutionofelementalandionicconcentrationsinwetdepositioninanurbanenvironment AT blaurent intraeventevolutionofelementalandionicconcentrationsinwetdepositioninanurbanenvironment AT kdesboeufs intraeventevolutionofelementalandionicconcentrationsinwetdepositioninanurbanenvironment AT gnoyalet intraeventevolutionofelementalandionicconcentrationsinwetdepositioninanurbanenvironment AT fmaisonneuve intraeventevolutionofelementalandionicconcentrationsinwetdepositioninanurbanenvironment AT olauret intraeventevolutionofelementalandionicconcentrationsinwetdepositioninanurbanenvironment AT olauret intraeventevolutionofelementalandionicconcentrationsinwetdepositioninanurbanenvironment AT schevaillier intraeventevolutionofelementalandionicconcentrationsinwetdepositioninanurbanenvironment |