Articles | Volume 26, issue 11
https://doi.org/10.5194/acp-26-8295-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-8295-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Measurement report
| 
12 Jun 2026
Measurement report |
| 12 Jun 2026
| 12 Jun 2026
Measurement report: Ice nucleating particles variability across a megacity
Sebastián Mendoza-Téllez
CORRESPONDING AUTHOR
Institute for Atmospheric Sciences and Climate Change, Universidad Nacional Autónoma de México, Mexico City, Mexico
Karla Valdés
División de Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana – Xochimilco, Mexico City, Mexico
David Ramírez
División de Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana – Xochimilco, Mexico City, Mexico
Jan Alexis Cedillo
Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
Olivia Rivera-Hernández
Dirección de Monitoreo de Calidad del Aire, Secretaría del Medio Ambiente, Ciudad de México, Mexico
Fernanda Córdoba
Institute for Atmospheric Sciences and Climate Change, Universidad Nacional Autónoma de México, Mexico City, Mexico
Harry Alvarez
Facultad de Ciencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
Javier Miranda
Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico
Irma Rosas
Institute for Atmospheric Sciences and Climate Change, Universidad Nacional Autónoma de México, Mexico City, Mexico
Graciela B. Raga
Institute for Atmospheric Sciences and Climate Change, Universidad Nacional Autónoma de México, Mexico City, Mexico
Emma Negrete
Institute for Atmospheric Sciences and Climate Change, Universidad Nacional Autónoma de México, Mexico City, Mexico
Leticia Martínez
Institute for Atmospheric Sciences and Climate Change, Universidad Nacional Autónoma de México, Mexico City, Mexico
Eva Salinas
Institute for Atmospheric Sciences and Climate Change, Universidad Nacional Autónoma de México, Mexico City, Mexico
Luis A. Ladino
CORRESPONDING AUTHOR
Institute for Atmospheric Sciences and Climate Change, Universidad Nacional Autónoma de México, Mexico City, Mexico
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Luis A. Ladino, Karin Ardon-Dryer, Diana L. Pereira, Ulrike Proske, Zyanya Ramirez-Diaz, Antonia Velicu, and Zamin A. Kanji
EGUsphere, https://doi.org/10.5194/egusphere-2025-4499, https://doi.org/10.5194/egusphere-2025-4499, 2025
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A survey and literature metadata analysis from the cloud physics community are used to investigate the state of diversity, equity and inclusion in the cloud physics research community. We show the evolution of gender contributions to cloud physics and the inclusion of scientists from the Global South. The publication analysis reveals the rate of men and women dropping out of the field is not different, however, gender balance was better achieved when women led publications compared to men.
M. Fernanda Córdoba, Rachel Chang, Harry Alvarez-Ospina, Aramis Olivos-Ortiz, Graciela B. Raga, Daniel Rosas-Ramírez, Guadalupe Campos, Isabel Márquez, Telma Castro, and Luis A. Ladino
Atmos. Meas. Tech., 18, 2463–2479, https://doi.org/10.5194/amt-18-2463-2025, https://doi.org/10.5194/amt-18-2463-2025, 2025
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The present study shows the development of the UNAM-MARine Aerosol Tank (UNAM-MARAT), a device that simulates wave breaking to generate marine aerosol particles. The portable and automatic tank is able to generate particle concentrations as high as 2000 cm-3, covering a wide range of sizes, similar to those found in the ambient marine boundary layer. The sea spray aerosol generated from three natural seawater samples was found to act as ice-nucleating particles (INPs) via immersion freezing.
Dene Bowdalo, Sara Basart, Marc Guevara, Oriol Jorba, Carlos Pérez García-Pando, Monica Jaimes Palomera, Olivia Rivera Hernandez, Melissa Puchalski, David Gay, Jörg Klausen, Sergio Moreno, Stoyka Netcheva, and Oksana Tarasova
Earth Syst. Sci. Data, 16, 4417–4495, https://doi.org/10.5194/essd-16-4417-2024, https://doi.org/10.5194/essd-16-4417-2024, 2024
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GHOST (Globally Harmonised Observations in Space and Time) represents one of the biggest collections of harmonised measurements of atmospheric composition at the surface. In total, 7 275 148 646 measurements from 1970 to 2023, from 227 different components, and from 38 reporting networks are compiled, parsed, and standardised. Components processed include gaseous species, total and speciated particulate matter, and aerosol optical properties.
Larissa Lacher, Michael P. Adams, Kevin Barry, Barbara Bertozzi, Heinz Bingemer, Cristian Boffo, Yannick Bras, Nicole Büttner, Dimitri Castarede, Daniel J. Cziczo, Paul J. DeMott, Romy Fösig, Megan Goodell, Kristina Höhler, Thomas C. J. Hill, Conrad Jentzsch, Luis A. Ladino, Ezra J. T. Levin, Stephan Mertes, Ottmar Möhler, Kathryn A. Moore, Benjamin J. Murray, Jens Nadolny, Tatjana Pfeuffer, David Picard, Carolina Ramírez-Romero, Mickael Ribeiro, Sarah Richter, Jann Schrod, Karine Sellegri, Frank Stratmann, Benjamin E. Swanson, Erik S. Thomson, Heike Wex, Martin J. Wolf, and Evelyn Freney
Atmos. Chem. Phys., 24, 2651–2678, https://doi.org/10.5194/acp-24-2651-2024, https://doi.org/10.5194/acp-24-2651-2024, 2024
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Aerosol particles that trigger ice formation in clouds are important for the climate system but are very rare in the atmosphere, challenging measurement techniques. Here we compare three cloud chambers and seven methods for collecting aerosol particles on filters for offline analysis at a mountaintop station. A general good agreement of the methods was found when sampling aerosol particles behind a whole air inlet, supporting their use for obtaining data that can be implemented in models.
Diana L. Pereira, Irma Gavilán, Consuelo Letechipía, Graciela B. Raga, Teresa Pi Puig, Violeta Mugica-Álvarez, Harry Alvarez-Ospina, Irma Rosas, Leticia Martinez, Eva Salinas, Erika T. Quintana, Daniel Rosas, and Luis A. Ladino
Atmos. Chem. Phys., 22, 6435–6447, https://doi.org/10.5194/acp-22-6435-2022, https://doi.org/10.5194/acp-22-6435-2022, 2022
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Airborne particles were i) collected in an agricultural fields and ii) generated in the laboratory from agricultural soil samples to analyze their ice nucleating abilities. It was found that the size and chemical composition of the Mexican agricultural dust particles influence their ice nucleating behavior, where the organic components are likely responsible for their efficiency as INPs. The INP concentrations from the present study are comparable to those from higher latitudes.
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Short summary
Magacities (i.e., urban centers with > 10 million inhabitants) are a great source of urban aerosol particles. In this study we evaluated the differences in the physicochemical and biological properties of the urban particles from southern and northern Mexico City, one of the largest Megacities worldwide. We also, correlated the observed differences with their capability to impact cloud formation, with the aim to link these observations with the presence of microclimates.
Magacities (i.e., urban centers with > 10 million inhabitants) are a great source of urban...
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