<div dir="ltr"><div dir="auto"><div><p dir="ltr" style="line-height:1.2;margin-top:0.0pt;margin-bottom:0.0pt" id="m_9163453797976423972docs-internal-guid-998d33a7-7fff-f247-d31b-02c211453fec"><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">Estimada Comunidad LatinMag,</span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br><br></span></p><p dir="ltr" style="line-height:1.2;text-align:justify;margin-top:0.0pt;margin-bottom:0.0pt"><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">Esperando que todos estén muy bien, les escribimos para invitarlos a la siguiente charla del ciclo de conferencias de LatinMag 2025. El próximo viernes 20 de Junio (Bogotá: 9:00, Ciudad de México: 8:00, São Paulo/Buenos Aires: 11:00). En esta oportunidad tendremos a Nicolas Hispagnol (National Observatory, Rio de Janeiro), con la charla titulada “Tracing Urban Air Pollution Through Magnetic Characterization of PM2.5 in São Paulo”. Al final de este mensaje pueden encontrar el link de Google Meet para la charla y su resumen. </span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br><br></span></p><p dir="ltr" style="line-height:1.2;margin-top:0.0pt;margin-bottom:0.0pt"><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">Esperamos verlos pronto,</span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">Victor Piedrahita y Romina Achaga</span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">------------------------------------------------------------</span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">Prezada Comunidade LatinMag,</span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">Esperando que todos estejam muito bem, escrevemos para convidá-los para a próxima palestra do ciclo de conferências LatinMag 2025. Será na próxima sexta-feira, 20 de Junho (Bogotá: 9:00, Cidade do México: 8:00, São Paulo/Buenos Aires: 11:00). Nesta ocasião, teremos a Nicolas Hispagnol (National Observatory, Rio de Janeiro), com a palestra intitulada “Mineral fabrics and emplacement of Permian and Jurassic arc plutons from the southern Colombian Andes”. Ao final desta mensagem, vocês encontram o link do GoogleMeet para a palestra e o resumo.</span></p><p dir="ltr" style="line-height:1.2;margin-top:0.0pt;margin-bottom:0.0pt"><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">Esperamos vê-los em breve,</span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">Victor Piedrahita e Romina Achaga</span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">------------------------------------------------------------</span></p>Link:<br><p dir="ltr" style="line-height:1.2;text-align:justify;margin-top:0.0pt;margin-bottom:0.0pt"><a href="https://meet.google.com/drz-tieo-edo" style="text-decoration-line:none" target="_blank"><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;text-decoration-line:underline;vertical-align:baseline">https://meet.google.com/drz-tieo-edo</span></a></p><p dir="ltr" style="line-height:1.2;text-align:justify;margin-top:0.0pt;margin-bottom:0.0pt"><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-weight:700;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">Tracing Urban Air Pollution Through Magnetic Characterization of PM2.5 in São Paulo</span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-weight:700;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">Urbanization and industrialization have intensified the emission of pollutants, including iron-bearing particulate matter (IPM), which is associated with vehicle exhaust, industrial activities, and road dust resuspension. These particles pose health risks by penetrating the respiratory and circulatory systems. Although São Paulo is a megacity with high levels of air pollution, the presence and behavior of metallic particles in the city remain poorly understood. To address this gap, PM2.5 samples were collected from high-traffic areas between 2022 and 2023. The samples were analyzed using magnetic characterization techniques—magnetic susceptibility, hysteresis, and isothermal remanent magnetization—and the results were correlated with meteorological data. Inversion modeling, using the Superparamagnetic Concentration and Dipole Moment method, was also applied to estimate the size and concentration of superparamagnetic particles and their relationship with atmospheric pollutants. The results revealed a predominance of magnetite/maghemite and indicated a reduction in ferromagnetic particle concentrations during the rainy season. Magnetic parameters showed strong correlations with PM2.5, NO2, and CO, highlighting environmental magnetism as a promising tool for monitoring urban air quality.</span></p><p dir="ltr" style="line-height:1.2;text-align:justify;margin-top:0.0pt;margin-bottom:0.0pt"><span style="font-size:11.5pt;font-family:"Quattrocento Sans",sans-serif;color:rgb(36,36,36);font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"><br></span></p><br><img src="cid:ii_1976a35d2d8702386831" style="margin-right: 0px;" width="450" height="388"><br><br></div><div><br></div><div data-smartmail="gmail_signature"><div dir="ltr"><font color="#666666">Romina Achaga</font><div><font color="#666666">Postdoctoral researcher <br></font><div><span style="color:rgb(102,102,102)">Campus France / CONICET</span></div><div><font color="#666666">IPGP / </font><font face="arial, helvetica, sans-serif" color="#666666"><span style="text-align:-webkit-center">CIFICEN</span></font></div><div><font face="arial, helvetica, sans-serif" color="#666666"><span style="text-align:-webkit-center"><br></span></font></div><div><div style="color:rgb(136,136,136)"><img width="96" height="48" src="https://ci3.googleusercontent.com/mail-sig/AIorK4xA8og_6Mq4KQ82Ss_Vpoj2cVlCO0yT5SEA6ZJAI17UP00vj9L1rP9g1fiAuaMLi77wF7IZK_G6VS2Q">   <img width="96" height="50" src="https://ci3.googleusercontent.com/mail-sig/AIorK4z1d_Vad15oPOFU57yOOwmVu6EZ6McG3qOkVburdym3mT3-jfyh2e50SlUF7Y19RXxX9ytkI5w"></div></div></div></div></div></div>
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