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O. Connan - One of the best experts on this subject based on the ideXlab platform.
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Simultaneous quantification of the contributions of dry, washout and Rainout deposition to the total deposition of particle-bound 7Be and 210Pb on an urban catchment area on a monthly scale
Journal of Aerosol Science, 2014Co-Authors: P. Laguionie, Pierre Roupsard, Denis Maro, Luc Solier, M. Rozet, D. Hébert, O. ConnanAbstract:This study deals with the time-evolution of the relative contributions of the three forms of atmospheric particle deposition under dry and wet weather conditions in an urban environment dry deposition, washout and Rainout deposition. An experimental set-up was installed in situ to measure the dry and wet deposition by integrating the processes of deposition over monthly periods. A semi-empirical model (PArticle Washout PAW) was developed to distinguish the deposition by washout and Rainout contained in the wet deposition over these same periods. These two parallel approaches allowed to quantify simultaneously the dry deposition as well as the washout and the Rainout deposition of two natural radionuclides of different origin (7Be and 210Pb) on an urban catchment area. The dry deposition on a heterogeneous urban surface was estimated knowing the dry deposition on homogeneous substrates and the distribution of these substrates on the developed surface of the Pin Sec catchment area in Nantes. On average, during the 15 months of experimental monitoring, deposition by Rainout was the predominant mechanism contributing to the monthly total deposition of 7Be and 210Pb, to the extent of 67% and 55%, respectively. Dry deposition contributed less to the total deposition, accounting for 21% and 28% of the 7Be and 210Pb, respectively. Lastly, washout was the weakest contributor to total deposition, with 12% for 7Be and 17% for 210Pb. The distribution of the contributions in the case of cosmic 7Be and terrigenous 210Pb is in agreement with the origin of these two radionuclides. By applying this method to other substrates and under different environmental conditions, the calibration of operational models could be refined to obtain a better prediction of the atmospheric particle-bound pollutant deposition. © 2014 Elsevier Ltd.
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Simultaneous quantification of the contributions of dry, washout and Rainout deposition to the total deposition of particle-bound 7Be and 210Pb on an urban catchment area on a monthly scale
Journal of Aerosol Science, 2014Co-Authors: P. Laguionie, Pierre Roupsard, Denis Maro, Luc Solier, M. Rozet, D. Hébert, O. ConnanAbstract:Abstract This study deals with the time-evolution of the relative contributions of the three forms of atmospheric particle deposition under dry and wet weather conditions in an urban environment: dry deposition, washout and Rainout deposition. An experimental set-up was installed in situ to measure the dry and wet deposition by integrating the processes of deposition over monthly periods. A semi-empirical model (PArticle Washout: PAW) was developed to distinguish the deposition by washout and Rainout contained in the wet deposition over these same periods. These two parallel approaches allowed to quantify simultaneously the dry deposition as well as the washout and the Rainout deposition of two natural radionuclides of different origin (7Be and 210Pb) on an urban catchment area. The dry deposition on a heterogeneous urban surface was estimated knowing the dry deposition on homogeneous substrates and the distribution of these substrates on the developed surface of the Pin Sec catchment area in Nantes. On average, during the 15 months of experimental monitoring, deposition by Rainout was the predominant mechanism contributing to the monthly total deposition of 7Be and 210Pb, to the extent of 67% and 55%, respectively. Dry deposition contributed less to the total deposition, accounting for 21% and 28% of the 7Be and 210Pb, respectively. Lastly, washout was the weakest contributor to total deposition, with 12% for 7Be and 17% for 210Pb. The distribution of the contributions in the case of cosmic 7Be and terrigenous 210Pb is in agreement with the origin of these two radionuclides. By applying this method to other substrates and under different environmental conditions, the calibration of operational models could be refined to obtain a better prediction of the atmospheric particle-bound pollutant deposition.
P. Laguionie - One of the best experts on this subject based on the ideXlab platform.
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Simultaneous quantification of the contributions of dry, washout and Rainout deposition to the total deposition of particle-bound 7Be and 210Pb on an urban catchment area on a monthly scale
Journal of Aerosol Science, 2014Co-Authors: P. Laguionie, Pierre Roupsard, Denis Maro, Luc Solier, M. Rozet, D. Hébert, O. ConnanAbstract:This study deals with the time-evolution of the relative contributions of the three forms of atmospheric particle deposition under dry and wet weather conditions in an urban environment dry deposition, washout and Rainout deposition. An experimental set-up was installed in situ to measure the dry and wet deposition by integrating the processes of deposition over monthly periods. A semi-empirical model (PArticle Washout PAW) was developed to distinguish the deposition by washout and Rainout contained in the wet deposition over these same periods. These two parallel approaches allowed to quantify simultaneously the dry deposition as well as the washout and the Rainout deposition of two natural radionuclides of different origin (7Be and 210Pb) on an urban catchment area. The dry deposition on a heterogeneous urban surface was estimated knowing the dry deposition on homogeneous substrates and the distribution of these substrates on the developed surface of the Pin Sec catchment area in Nantes. On average, during the 15 months of experimental monitoring, deposition by Rainout was the predominant mechanism contributing to the monthly total deposition of 7Be and 210Pb, to the extent of 67% and 55%, respectively. Dry deposition contributed less to the total deposition, accounting for 21% and 28% of the 7Be and 210Pb, respectively. Lastly, washout was the weakest contributor to total deposition, with 12% for 7Be and 17% for 210Pb. The distribution of the contributions in the case of cosmic 7Be and terrigenous 210Pb is in agreement with the origin of these two radionuclides. By applying this method to other substrates and under different environmental conditions, the calibration of operational models could be refined to obtain a better prediction of the atmospheric particle-bound pollutant deposition. © 2014 Elsevier Ltd.
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Simultaneous quantification of the contributions of dry, washout and Rainout deposition to the total deposition of particle-bound 7Be and 210Pb on an urban catchment area on a monthly scale
Journal of Aerosol Science, 2014Co-Authors: P. Laguionie, Pierre Roupsard, Denis Maro, Luc Solier, M. Rozet, D. Hébert, O. ConnanAbstract:Abstract This study deals with the time-evolution of the relative contributions of the three forms of atmospheric particle deposition under dry and wet weather conditions in an urban environment: dry deposition, washout and Rainout deposition. An experimental set-up was installed in situ to measure the dry and wet deposition by integrating the processes of deposition over monthly periods. A semi-empirical model (PArticle Washout: PAW) was developed to distinguish the deposition by washout and Rainout contained in the wet deposition over these same periods. These two parallel approaches allowed to quantify simultaneously the dry deposition as well as the washout and the Rainout deposition of two natural radionuclides of different origin (7Be and 210Pb) on an urban catchment area. The dry deposition on a heterogeneous urban surface was estimated knowing the dry deposition on homogeneous substrates and the distribution of these substrates on the developed surface of the Pin Sec catchment area in Nantes. On average, during the 15 months of experimental monitoring, deposition by Rainout was the predominant mechanism contributing to the monthly total deposition of 7Be and 210Pb, to the extent of 67% and 55%, respectively. Dry deposition contributed less to the total deposition, accounting for 21% and 28% of the 7Be and 210Pb, respectively. Lastly, washout was the weakest contributor to total deposition, with 12% for 7Be and 17% for 210Pb. The distribution of the contributions in the case of cosmic 7Be and terrigenous 210Pb is in agreement with the origin of these two radionuclides. By applying this method to other substrates and under different environmental conditions, the calibration of operational models could be refined to obtain a better prediction of the atmospheric particle-bound pollutant deposition.
Takatoshi Hiraki - One of the best experts on this subject based on the ideXlab platform.
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The contribution of site to washout and Rainout: Precipitation chemistry based on sample analysis from 0.5 mm precipitation increments and numerical simulation
Atmospheric Environment, 2014Co-Authors: Masahide Aikawa, Mizuo Kajino, Takatoshi Hiraki, Hitoshi MukaiAbstract:Abstract Datasets of precipitation chemistry at a precipitation resolution of 0.5 mm from three sites were studied to determine whether the washout and Rainout mechanisms differed with site type (urban, suburban, rural). Rainout accounted for approximately one-third of the total NO3− deposition and washout contributed two-thirds, irrespective of the site type, although the washout contribution at the urban site (over 70%) was larger than that at the other two sites. The Rainout mechanism and the washout mechanism both accounted for about half the total SO42− deposition at the suburban and rural sites, whereas at the urban site the Rainout contribution was over 80%. A chemical transport model produced similar levels of washout and Rainout contributions as the precipitation chemistry data.
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washout Rainout contribution in wet deposition estimated by 0 5 mm precipitation sampling analysis
Atmospheric Environment, 2009Co-Authors: Masahide Aikawa, Takatoshi HirakiAbstract:Abstract A precipitation dataset collected on a 0.5 mm precipitation basis was studied. The parameters analyzed in this study were the pH (i.e., H+ concentration), electric conductivity (EC), and S O 4 2− and N O 3 − concentrations. The N O 3 − concentration clearly decayed with an increase of the precipitation amount, while a larger variation was observed in the S O 4 2− concentration even when the precipitation amount increased. Assuming that the decaying N O 3 − concentration (0.70 μg ml−1) was the result of the Rainout process, the estimates were: annual total deposition, 3252 mg m−2 yr−1; Rainout process, 1092 mg m−2 yr−1; and Rainout/total, 34%. The estimates for S O 4 2− were: annual total deposition, 4687 mg m−2 yr−1; Rainout process, 2096 mg m−2 yr−1; and Rainout/total, 45%.
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Washout/Rainout contribution in wet deposition estimated by 0.5 mm precipitation sampling/analysis
Atmospheric Environment, 2009Co-Authors: Masahide Aikawa, Takatoshi HirakiAbstract:Abstract A precipitation dataset collected on a 0.5 mm precipitation basis was studied. The parameters analyzed in this study were the pH (i.e., H+ concentration), electric conductivity (EC), and S O 4 2− and N O 3 − concentrations. The N O 3 − concentration clearly decayed with an increase of the precipitation amount, while a larger variation was observed in the S O 4 2− concentration even when the precipitation amount increased. Assuming that the decaying N O 3 − concentration (0.70 μg ml−1) was the result of the Rainout process, the estimates were: annual total deposition, 3252 mg m−2 yr−1; Rainout process, 1092 mg m−2 yr−1; and Rainout/total, 34%. The estimates for S O 4 2− were: annual total deposition, 4687 mg m−2 yr−1; Rainout process, 2096 mg m−2 yr−1; and Rainout/total, 45%.
Pierre Roupsard - One of the best experts on this subject based on the ideXlab platform.
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Simultaneous quantification of the contributions of dry, washout and Rainout deposition to the total deposition of particle-bound 7Be and 210Pb on an urban catchment area on a monthly scale
Journal of Aerosol Science, 2014Co-Authors: P. Laguionie, Pierre Roupsard, Denis Maro, Luc Solier, M. Rozet, D. Hébert, O. ConnanAbstract:This study deals with the time-evolution of the relative contributions of the three forms of atmospheric particle deposition under dry and wet weather conditions in an urban environment dry deposition, washout and Rainout deposition. An experimental set-up was installed in situ to measure the dry and wet deposition by integrating the processes of deposition over monthly periods. A semi-empirical model (PArticle Washout PAW) was developed to distinguish the deposition by washout and Rainout contained in the wet deposition over these same periods. These two parallel approaches allowed to quantify simultaneously the dry deposition as well as the washout and the Rainout deposition of two natural radionuclides of different origin (7Be and 210Pb) on an urban catchment area. The dry deposition on a heterogeneous urban surface was estimated knowing the dry deposition on homogeneous substrates and the distribution of these substrates on the developed surface of the Pin Sec catchment area in Nantes. On average, during the 15 months of experimental monitoring, deposition by Rainout was the predominant mechanism contributing to the monthly total deposition of 7Be and 210Pb, to the extent of 67% and 55%, respectively. Dry deposition contributed less to the total deposition, accounting for 21% and 28% of the 7Be and 210Pb, respectively. Lastly, washout was the weakest contributor to total deposition, with 12% for 7Be and 17% for 210Pb. The distribution of the contributions in the case of cosmic 7Be and terrigenous 210Pb is in agreement with the origin of these two radionuclides. By applying this method to other substrates and under different environmental conditions, the calibration of operational models could be refined to obtain a better prediction of the atmospheric particle-bound pollutant deposition. © 2014 Elsevier Ltd.
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Simultaneous quantification of the contributions of dry, washout and Rainout deposition to the total deposition of particle-bound 7Be and 210Pb on an urban catchment area on a monthly scale
Journal of Aerosol Science, 2014Co-Authors: P. Laguionie, Pierre Roupsard, Denis Maro, Luc Solier, M. Rozet, D. Hébert, O. ConnanAbstract:Abstract This study deals with the time-evolution of the relative contributions of the three forms of atmospheric particle deposition under dry and wet weather conditions in an urban environment: dry deposition, washout and Rainout deposition. An experimental set-up was installed in situ to measure the dry and wet deposition by integrating the processes of deposition over monthly periods. A semi-empirical model (PArticle Washout: PAW) was developed to distinguish the deposition by washout and Rainout contained in the wet deposition over these same periods. These two parallel approaches allowed to quantify simultaneously the dry deposition as well as the washout and the Rainout deposition of two natural radionuclides of different origin (7Be and 210Pb) on an urban catchment area. The dry deposition on a heterogeneous urban surface was estimated knowing the dry deposition on homogeneous substrates and the distribution of these substrates on the developed surface of the Pin Sec catchment area in Nantes. On average, during the 15 months of experimental monitoring, deposition by Rainout was the predominant mechanism contributing to the monthly total deposition of 7Be and 210Pb, to the extent of 67% and 55%, respectively. Dry deposition contributed less to the total deposition, accounting for 21% and 28% of the 7Be and 210Pb, respectively. Lastly, washout was the weakest contributor to total deposition, with 12% for 7Be and 17% for 210Pb. The distribution of the contributions in the case of cosmic 7Be and terrigenous 210Pb is in agreement with the origin of these two radionuclides. By applying this method to other substrates and under different environmental conditions, the calibration of operational models could be refined to obtain a better prediction of the atmospheric particle-bound pollutant deposition.
Luc Solier - One of the best experts on this subject based on the ideXlab platform.
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Simultaneous quantification of the contributions of dry, washout and Rainout deposition to the total deposition of particle-bound 7Be and 210Pb on an urban catchment area on a monthly scale
Journal of Aerosol Science, 2014Co-Authors: P. Laguionie, Pierre Roupsard, Denis Maro, Luc Solier, M. Rozet, D. Hébert, O. ConnanAbstract:This study deals with the time-evolution of the relative contributions of the three forms of atmospheric particle deposition under dry and wet weather conditions in an urban environment dry deposition, washout and Rainout deposition. An experimental set-up was installed in situ to measure the dry and wet deposition by integrating the processes of deposition over monthly periods. A semi-empirical model (PArticle Washout PAW) was developed to distinguish the deposition by washout and Rainout contained in the wet deposition over these same periods. These two parallel approaches allowed to quantify simultaneously the dry deposition as well as the washout and the Rainout deposition of two natural radionuclides of different origin (7Be and 210Pb) on an urban catchment area. The dry deposition on a heterogeneous urban surface was estimated knowing the dry deposition on homogeneous substrates and the distribution of these substrates on the developed surface of the Pin Sec catchment area in Nantes. On average, during the 15 months of experimental monitoring, deposition by Rainout was the predominant mechanism contributing to the monthly total deposition of 7Be and 210Pb, to the extent of 67% and 55%, respectively. Dry deposition contributed less to the total deposition, accounting for 21% and 28% of the 7Be and 210Pb, respectively. Lastly, washout was the weakest contributor to total deposition, with 12% for 7Be and 17% for 210Pb. The distribution of the contributions in the case of cosmic 7Be and terrigenous 210Pb is in agreement with the origin of these two radionuclides. By applying this method to other substrates and under different environmental conditions, the calibration of operational models could be refined to obtain a better prediction of the atmospheric particle-bound pollutant deposition. © 2014 Elsevier Ltd.
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Simultaneous quantification of the contributions of dry, washout and Rainout deposition to the total deposition of particle-bound 7Be and 210Pb on an urban catchment area on a monthly scale
Journal of Aerosol Science, 2014Co-Authors: P. Laguionie, Pierre Roupsard, Denis Maro, Luc Solier, M. Rozet, D. Hébert, O. ConnanAbstract:Abstract This study deals with the time-evolution of the relative contributions of the three forms of atmospheric particle deposition under dry and wet weather conditions in an urban environment: dry deposition, washout and Rainout deposition. An experimental set-up was installed in situ to measure the dry and wet deposition by integrating the processes of deposition over monthly periods. A semi-empirical model (PArticle Washout: PAW) was developed to distinguish the deposition by washout and Rainout contained in the wet deposition over these same periods. These two parallel approaches allowed to quantify simultaneously the dry deposition as well as the washout and the Rainout deposition of two natural radionuclides of different origin (7Be and 210Pb) on an urban catchment area. The dry deposition on a heterogeneous urban surface was estimated knowing the dry deposition on homogeneous substrates and the distribution of these substrates on the developed surface of the Pin Sec catchment area in Nantes. On average, during the 15 months of experimental monitoring, deposition by Rainout was the predominant mechanism contributing to the monthly total deposition of 7Be and 210Pb, to the extent of 67% and 55%, respectively. Dry deposition contributed less to the total deposition, accounting for 21% and 28% of the 7Be and 210Pb, respectively. Lastly, washout was the weakest contributor to total deposition, with 12% for 7Be and 17% for 210Pb. The distribution of the contributions in the case of cosmic 7Be and terrigenous 210Pb is in agreement with the origin of these two radionuclides. By applying this method to other substrates and under different environmental conditions, the calibration of operational models could be refined to obtain a better prediction of the atmospheric particle-bound pollutant deposition.