@article{MTMT:34763373, title = {New particle formation event detection with convolutional neural networks}, url = {https://m2.mtmt.hu/api/publication/34763373}, author = {Zhang, Xun and Wu, Lijie and Liu, Xiansheng and Wang, Tao and Monge, Marta and Garcia-Marlès, Meritxell and Savadkoohi, Marjan and Salma, Imre and Bastian, Susanne and Merkel, Maik and Weinhold, Kay and Wiedensohler, Alfred and Gerwig, Holger and Putaud, Jean and Dos Dantos, Sebastiao Martins and Ondracek, Jakub and Zikova, Nadezda and Minkos, Andrea and Pandolfi, Marco and Alastuey, Andrés and Querol, Xavier}, doi = {10.1016/j.atmosenv.2024.120487}, journal-iso = {ATMOS ENVIRON}, journal = {ATMOSPHERIC ENVIRONMENT}, volume = {327}, unique-id = {34763373}, issn = {1352-2310}, year = {2024}, eissn = {1873-2844}, orcid-numbers = {Liu, Xiansheng/0000-0002-0228-5551; Savadkoohi, Marjan/0000-0002-3707-2601; Salma, Imre/0000-0001-8319-1647; Gerwig, Holger/0000-0003-1921-6496; Putaud, Jean/0000-0001-9785-8561; Zikova, Nadezda/0000-0001-8753-386X; Alastuey, Andrés/0000-0002-5453-5495; Querol, Xavier/0000-0002-6549-9899} } @article{MTMT:34680880, title = {Inter-annual trends of ultrafine particles in urban Europe}, url = {https://m2.mtmt.hu/api/publication/34680880}, author = {Garcia-Marlès, Meritxell and Lara, Rosa and Reche, Cristina and Pérez, Noemí and Tobías, Aurelio and Savadkoohi, Marjan and Beddows, David and Salma, Imre and Vörösmarty, Máté and Weidinger, Tamás and Hueglin, Christoph and Mihalopoulos, Nikos and Grivas, Georgios and Kalkavouras, Panayiotis and Ondracek, Jakub and Zikova, Nadezda and Niemi, Jarkko V. and Manninen, Hanna E. and Green, David C. and Tremper, Anja H. and Norman, Michael and Vratolis, Stergios and Eleftheriadis, Konstantinos and Gómez-Moreno, Francisco J. and Alonso-Blanco, Elisabeth and Wiedensohler, Alfred and Weinhold, Kay and Merkel, Maik and Bastian, Susanne and Hoffmann, Barbara and Altug, Hicran and Petit, Jean-Eudes and Favez, Olivier and Santos, Sebastiao Martins Dos and Putaud, Jean-Philippe and Dinoi, Adelaide and Contini, Daniele and Timonen, Hilkka and Lampilahti, Janne and Petäjä, Tuukka and Pandolfi, Marco and Hopke, Philip K. and Harrison, Roy M. and Alastuey, Andrés and Querol, Xavier}, doi = {10.1016/j.envint.2024.108510}, journal-iso = {ENVIRON INT}, journal = {ENVIRONMENT INTERNATIONAL}, volume = {185}, unique-id = {34680880}, issn = {0160-4120}, year = {2024}, eissn = {1873-6750}, orcid-numbers = {Garcia-Marlès, Meritxell/0000-0003-2680-5627; Lara, Rosa/0000-0003-2667-5973; Savadkoohi, Marjan/0000-0002-3707-2601; Salma, Imre/0000-0001-8319-1647; Weidinger, Tamás/0000-0001-7500-6579; Grivas, Georgios/0000-0001-5023-7039; Zikova, Nadezda/0000-0001-8753-386X; Eleftheriadis, Konstantinos/0000-0003-2265-4905; Hoffmann, Barbara/0000-0002-8435-5575; Altug, Hicran/0000-0001-9430-6155; Favez, Olivier/0000-0002-8821-1923; Contini, Daniele/0000-0003-4454-0642; Petäjä, Tuukka/0000-0002-1881-9044; Alastuey, Andrés/0000-0002-5453-5495} } @article{MTMT:34630726, title = {Attribution of aerosol particle number size distributions to major sources using a 11-year-long urban dataset}, url = {https://m2.mtmt.hu/api/publication/34630726}, author = {Vörösmarty, Máté and Philip, K. Hopke and Salma, Imre}, journal = {EGUsphere}, unique-id = {34630726}, issn = {2198-5634}, abstract = {Source apportionment was performed using size segregated particle number concentrations (PNCs) in 27 size channels over the diameter range of 6–1000 nm augmented by air pollutants all with a time resolution of 1 h in the urban background of Budapest for 11 full years in separate seasons. The input dataset was corrected for the effect of the local meteorology by dispersion normalization using the ventilation coefficient defined as the planetary boundary mixing layer height multiplied by the wind speed. Both the uncorrected and dispersion-corrected datasets were evaluated using positive matrix factorization. Six source types including nucleation, two road vehicle emission sources separated into a semi-volatile fraction and a solid core fraction, diffuse urban source, secondary inorganic aerosol (SIA), and ozone-associated particles were identified, characterised, and quantified. The ventilation correction substantially modified the input concentrations, while the differences in the corrected-to-uncorrected ratios for the contributions remained within 5 %. The overall mean relative contribution of the road traffic emission sources was 60 %, and did not show considerable seasonal variability. Nucleation was responsible for 20 % of the PNC annually as a lower estimate. It exhibited a compound character consisting of photochemically induced nucleation and traffic-related nucleation. The former process occurs on regional or urban spatial scales around noon, whereas the latter process happens when the gas-phase vapours in the vehicle exhaust cool, and the resulted supersaturated vapours nucleate outside the source. Its relative contributions were maximal in spring (somewhat smaller in summer and autumn) and minimal in winter. The contributions from the SIA and the urban diffuse source types were approximately 10 % in spring, summer, and 12–15 % in autumn and winter, respectively. The O3-associated secondary aerosol made up the smallest (6 %) portion of particles on an annual basis. Directionality variations investigated by conditional bivariate probability function analysis were used to locate the likely source areas, and showed considerable spatial variations in the source origin.}, year = {2024}, orcid-numbers = {Salma, Imre/0000-0001-8319-1647} } @article{MTMT:34539512, title = {Insights into the sources of ultrafine particle numbers at six European urban sites obtained by investigating COVID–19 lockdowns}, url = {https://m2.mtmt.hu/api/publication/34539512}, author = {Alex, Rowell and James, Brean and David, C. S. Beddows and Zongbo, Shi and Tuukka, Petäjä and Vörösmarty, Máté and Salma, Imre and Jarkko, V. Niemi and Hanna, E. Manninen and Dominik, van Pinxteren and Roy, M. Harrison and Thomas, Tuch and Kay, Weinhold}, doi = {10.5194/egusphere-2023-3053}, journal = {EGUsphere}, unique-id = {34539512}, issn = {2198-5634}, year = {2024}, orcid-numbers = {Salma, Imre/0000-0001-8319-1647} } @article{MTMT:34394870, title = {Oxidative potential in rural, suburban and city centre atmospheric environments in central Europe}, url = {https://m2.mtmt.hu/api/publication/34394870}, author = {Vörösmarty, Máté and Uzu, Gaëlle and Jaffrezo, Jean-Luc and Dominutti, Pamela and Kertész, Zsófia and Papp, Enikő Ivett and Salma, Imre}, doi = {10.5194/acp-23-14255-2023}, journal-iso = {ATMOS CHEM PHYS}, journal = {ATMOSPHERIC CHEMISTRY AND PHYSICS}, volume = {23}, unique-id = {34394870}, issn = {1680-7316}, abstract = {Abstract. Oxidative potential (OP) is an emerging health-related metric which integrates several physicochemical properties of particulate matter (PM) that are involved in the pathogenesis of the diseases resulting from exposure to PM. Daily PM2.5-fraction aerosol samples collected in the rural background of the Carpathian Basin and in the suburban area and centre of its largest city of Budapest in each season over 1 year were utilised to study the OP at the related locations for the first time. The samples were analysed for particulate matter mass, main carbonaceous species, levoglucosan and 20 chemical elements. The resulting data sets were subjected to positive matrix factorisation to derive the main aerosol sources. Biomass burning (BB), suspended dust, road traffic, oil combustion mixed with coal combustion and long-range transport, vehicle metal wear, and mixed industrial sources were identified. The OP of the sample extracts in simulated lung fluid was determined by ascorbic acid (AA) and dithiothreitol (DTT) assays. The comparison of the OP data sets revealed some differences in the sensitivities of the assays. In the heating period, both the OP and PM mass levels were higher than in spring and summer, but there was a clear misalignment between them. In addition, the heating period : non-heating period OP ratios in the urban locations were larger than for the rural background by factors of 2–4. The OP data sets were attributed to the main aerosol sources using multiple linear regression with the weighted least squares approach. The OP was unambiguously dominated by BB at all sampling locations in winter and autumn. The joint effects of motor vehicles involving the road traffic and vehicle metal wear played the most important role in summer and spring, with considerable contributions from oil combustion and resuspended dust. In winter, there is temporal coincidence between the most severe daily PM health limit exceedances in the whole Carpathian Basin and the chemical PM composition causing larger OP. Similarly, in spring and summer, there is a spatial coincidence in Budapest between the urban hotspots of OP-active aerosol constituents from traffic and the high population density in central quarters. These features offer possibilities for more efficient season-specific air quality regulations focusing on well-selected aerosol sources or experimentally determined OP, rather than on PM mass in general.}, year = {2023}, eissn = {1680-7324}, pages = {14255-14269}, orcid-numbers = {Uzu, Gaëlle/0000-0002-7720-0233; Dominutti, Pamela/0000-0002-9876-6383; Papp, Enikő Ivett/0000-0002-3761-049X; Salma, Imre/0000-0001-8319-1647} } @article{MTMT:34189383, title = {Firework smoke: Impacts on urban air quality and deposition in the human respiratory system}, url = {https://m2.mtmt.hu/api/publication/34189383}, author = {Salma, Imre and Farkas, Árpád and Weidinger, Tamás and Balogh, Miklós}, doi = {10.1016/j.envpol.2023.121612}, journal-iso = {ENVIRON POLLUT}, journal = {ENVIRONMENTAL POLLUTION}, volume = {328}, unique-id = {34189383}, issn = {0269-7491}, abstract = {Particle number concentrations and size distributions resulting from the firework displays held in Budapest, Hungary every year on St. Stephen's Day were studied over a period of seven years. In the year most impacted, the total particle number concentration reached its peak measured level of 369 x 103 cm-3 5 min after the end of the display, and returned to the pre-event state within 45 min. The fireworks increased hourly mean concentrations by a factor of 5-6, whereas the concentrations in the diameter range of 100-1000 nm, in which the magnitude of the increase was the greatest, were elevated by a factor of 20-25. An extra particle size mode at 203 nm was manifested in the size distributions as result of the fireworks. The PM10 mass concentrations at peak firework influence and as 1-h mean increased 123 and 58 times, respectively, relative to the concentration before the display. The smoke was characterised by a relatively short overall atmospheric residence time of 25 min. Spatiotemporal dispersion simulations revealed that there were substantial vertical and horizontal concentration gradients in the firework plume. The affected area made up a large part of the city. Not only the spectators of the display at the venue and nearby areas, but the population located further away downwind of the displays and more distant, large and populous urban quarters were affected by the plume and its fallout. The fireworks increased the deposition rate in the respiratory system of females by a factor of 4, as a conservative estimate. The largest surface density deposition rates were seen in the segmental and sub-segmental bronchi, which represents an excessive risk to health. Compared to adults, children were more susceptible to exposure, with the maximum surface density deposition rates in their case being three times those of adults in the trachea.}, keywords = {GROWTH; particulate matter; air pollution; pollution; simulation; size distribution; NUCLEATION; SIZE DISTRIBUTIONS; particle number concentration; ULTRAFINE ATMOSPHERIC AEROSOL; Particle formation; Fireworks; fine particulate; Plume dispersion}, year = {2023}, eissn = {1873-6424}, orcid-numbers = {Salma, Imre/0000-0001-8319-1647; Weidinger, Tamás/0000-0001-7500-6579} } @article{MTMT:34084196, title = {A tűzijáték árnyai és fényei}, url = {https://m2.mtmt.hu/api/publication/34084196}, author = {Salma, Imre and Farkas, Árpád and Weidinger, Tamás and Balogh, Miklós}, journal-iso = {MAGY KEM LAP}, journal = {MAGYAR KÉMIKUSOK LAPJA}, volume = {78}, unique-id = {34084196}, issn = {0025-0163}, year = {2023}, eissn = {1588-1199}, pages = {214-217}, orcid-numbers = {Salma, Imre/0000-0001-8319-1647; Weidinger, Tamás/0000-0001-7500-6579} } @article{MTMT:34063868, title = {Ambient air particulate total lung deposited surface area (LDSA) levels in urban Europe}, url = {https://m2.mtmt.hu/api/publication/34063868}, author = {Liu, Xiansheng and Hadiatullah, Hadiatullah and Zhang, Xun and Trechera, Pedro and Savadkoohi, Marjan and Garcia-Marlès, Meritxell and Reche, Cristina and Pérez, Noemí and Beddows, David C.S. and Salma, Imre and Thén, Wanda and Kalkavouras, Panayiotis and Mihalopoulos, Nikos and Hueglin, Christoph and Green, David C. and Tremper, Anja H. and Chazeau, Benjamin and Gille, Grégory and Marchand, Nicolas and Niemi, Jarkko V. and Manninen, Hanna E. and Portin, Harri and Zikova, Nadia and Ondracek, Jakub and Norman, Michael and Gerwig, Holger and Bastian, Susanne and Merkel, Maik and Weinhold, Kay and Casans, Andrea and Casquero-Vera, Juan Andrés and Gómez-Moreno, Francisco J. and Artíñano, Begoña and Gini, Maria and Diapouli, Evangelia and Crumeyrolle, Suzanne and Riffault, Véronique and Petit, Jean-Eudes and Favez, Olivier and Putaud, Jean-Philippe and Santos, Sebastiao Martins Dos and Timonen, Hilkka and Aalto, Pasi P. and Hussein, Tareq and Lampilahti, Janne and Hopke, Philip K. and Wiedensohler, Alfred and Harrison, Roy M. and Petäjä, Tuukka and Pandolfi, Marco and Alastuey, Andrés and Querol, Xavier}, doi = {10.1016/j.scitotenv.2023.165466}, journal-iso = {SCI TOTAL ENVIRON}, journal = {SCIENCE OF THE TOTAL ENVIRONMENT}, volume = {898}, unique-id = {34063868}, issn = {0048-9697}, year = {2023}, eissn = {1879-1026}, orcid-numbers = {Salma, Imre/0000-0001-8319-1647; Thén, Wanda/0000-0002-3074-4487} } @article{MTMT:33570499, title = {Phenomenology of ultrafine particle concentrations and size distribution across urban Europe}, url = {https://m2.mtmt.hu/api/publication/33570499}, author = {Trechera, Pedro and Garcia-Marlès, Meritxell and Liu, Xiansheng and Reche, Cristina and Pérez, Noemí and Savadkoohi, Marjan and Beddows, David and Salma, Imre and Vörösmarty, Máté and Casans, Andrea and Andrés Casquero-Vera, Juan and Hueglin, Christoph and Marchand, Nicolas and Chazeau, Benjamin and Gille, Grégory and Kalkavouras, Panayiotis and Mihalopoulos, Nikos and Ondracek, Jakub and Zikova, Nadia and Niemi, Jarkko V. and Manninen, Hanna E. and Green, David C. and Tremper, Anja H. and Norman, Michael and Vratolis, Stergios and Eleftheriadis, Konstantinos and Gómez-Moreno, Francisco J. and Alonso-Blanco, Elisabeth and Gerwig, Holger and Wiedensohler, Alfred and Weinhold, Kay and Merkel, Maik and Bastian, Susanne and Petit, Jean-Eudes and Favez, Olivier and crumeyrolle, Suzanne and Ferlay, Nicolas and Martins Dos Santos, Sebastiao and Putaud, Jean-Philippe and Timonen, Hilkka and Lampilahti, Janne and Asbach, Christof and Wolf, Carmen and Kaminski, Heinz and Altug, Hicran and Hoffmann, Barbara and Rich, David Q. and Pandolfi, Marco and Harrison, Roy M. and Hopke, Philip K. and Petäjä, Tuukka and Alaustey, Andrés and Querol, Xavier}, doi = {10.1016/j.envint.2023.107744}, journal-iso = {ENVIRON INT}, journal = {ENVIRONMENT INTERNATIONAL}, volume = {172}, unique-id = {33570499}, issn = {0160-4120}, year = {2023}, eissn = {1873-6750}, orcid-numbers = {Trechera, Pedro/0000-0002-3557-9353; Garcia-Marlès, Meritxell/0000-0003-2680-5627; Savadkoohi, Marjan/0000-0002-3707-2601; Salma, Imre/0000-0001-8319-1647; Casans, Andrea/0000-0001-7142-5362; Hueglin, Christoph/0000-0002-6973-522X; Marchand, Nicolas/0000-0001-9745-492X; Chazeau, Benjamin/0000-0001-8844-2652; Eleftheriadis, Konstantinos/0000-0003-2265-4905; Petit, Jean-Eudes/0000-0003-1516-5927; crumeyrolle, Suzanne/0000-0002-1491-5653; Altug, Hicran/0000-0001-9430-6155; Hoffmann, Barbara/0000-0002-8435-5575; Petäjä, Tuukka/0000-0002-1881-9044; Alaustey, Andrés/0000-0002-5453-5495} } @CONFERENCE{MTMT:33119050, title = {Dispersion simulation of firework-related aerosols}, url = {https://m2.mtmt.hu/api/publication/33119050}, author = {Balogh, Miklós and Farkas, Árpád and Weidinger, Tamás and Salma, Imre}, booktitle = {CMFF’22 Workshop on " Coupling techniques in multiscale atmospheric models: Microphysics, local scale simulations, PBL structureels"}, unique-id = {33119050}, year = {2022}, orcid-numbers = {Weidinger, Tamás/0000-0001-7500-6579; Salma, Imre/0000-0001-8319-1647} }