1:45pm - 2:00pmTU3-3: 1
Boundary layer influence enhancing new particle formation at the high-altitude Izaña Atmospheric Observatory (2367 m a.s.l.)
Myriam Agro'1, Wei Huang1, Jiali Shen1, Diego Aliaga1, Magdalena Okuljar1, Africa Barreto2, Sergio Rodríguez3, Yenny González2,6, Jessica López-Darias3, Tuukka Petäjä1, Katrianne Lehtipalo1, Juan Andrés Casquero-Vera1,4, Jonathan Duplissy1, Gloria Titos4,5, Andrea Casans4,5, Markku Kulmala1, Federico Bianchi1
1University of Helsinki, Finland; 2Izaña Atmospheric Research Center, Spain; 3Aerosols and Climate-AAC, IPNA CSIC, Spain; 4Andalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Spain; 5Department of Applied Physics, University of Granada, Spain; 6CIMEL Electronique, France
The study investigates New Particle Formation (NPF) at the high-altitude Izaña Atmospheric Observatory (2367 m a.s.l.) in Tenerife, Spain, through a three-month campaign (March–June 2022). Results indicate that particle concentrations are influenced by the upward transport of ~20 nm particles from the boundary layer (BL) and local clustering of sub-3 nm particles, which is enhanced by this transport. Sulfuric acid and highly oxygenated organic molecules contribute to NPF and originate from the BL, highlighting its critical role. Additionally, the study analyzes growth and formation rates of sub-3 nm particles, volatile organic compounds, and SO₂ to identify chemical pathways of NPF.
2:00pm - 2:15pmTU3-3: 2
Chemical characterization of mineral dust-influenced clustering events at the pristine high-altitude Izaña Atmospheric Observatory (2367 m a.s.l.), Canary Islands
Wei Huang1,2, Jiali Shen2, Myriam Agrò2, Chen Yang2,3, Juan A. Casquero-Vera2,4, Magdalena Okuljar2,5, Diego Aliaga2,6, Africa Barreto7, Sergio Rodríguez7,8, Yenny González7,9, Jessica López-Darias7,8, Andrea Casans4,10, Gloria Titos4,10, Jonathan Duplissy2, Tuukka Petäjä2, Markku Kulmala2, Federico Bianchi2
1PSI Center for Energy and Environmental Sciences, 5232 Villigen PSI, Switzerland; 2INAR, Faculty of Science, University of Helsinki, Helsinki, 00014, Finland; 3Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; 4Andalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, Granada, Spain; 5School of Earth and Atmospheric Sciences, Queensland University of Technology, Brisbane, Australia; 6Department of Environmental Science & Bolin Centre for Climate Research, Stockholm University, Stockholm, 10691, Sweden; 7Izaña Atmospheric Research Center, Agencia Estatal de Meteorología, Santa Cruz de Tenerife, Spain; 8Group of Atmosphere, Aerosols and Climate-AAC, IPNA CSIC, Tenerife, Spain; 9Department of R&D, CIMEL Electronique, Paris, 75011, France; 10Department of Applied Physics, University of Granada, Granada, Spain
Mineral dust particles have been found to promote clustering and subsequent new particle formation (NPF) in the atmosphere.
Here we investigate the chemical composition and volatility of NPF precursors contributing to the mineral dust-influenced clustering events at a pristine high-altitude location, Canary Islands.
Lower concentrations of NPF precursors were observed for dust-influenced clustering events than clear clustering events. They were most likely to be biogenic origin.
We will compare the chemical composition and volatility of NPF precursors, as well as their potential formation pathways and discuss the resulting effects on particle formation and growth in the presence of dust.
2:15pm - 2:30pmTU3-3: 3
Particle Size Distribution and New Particle Formation in the Mediterranean Free Troposphere: Two Decades of Observations at Monte Cimone
Martina Mazzini1,2, Manuel Bettineschi2, Giancarlo Ciarelli2, Jgor Arduini3, Michela Maione1,3, Cecilia Magnani1, Paolo Cristofanelli1, Bonasoni Paolo1, Federico Bianchi2, Angela Marinoni1
1Institute of Atmospheric Sciences and Climate – National Research Council of Italy, Bologna, Italy; 2Institute for Atmospheric and Earth System Research, Helsinki, 00014, Finland; 3Dipartimento di Scienze Pure e Applicate (DiSPeA), Università degli Studi di Urbino Carlo Bo, Urbino, 61029 , Italia
This study explores two decades of ultrafine particle observations at Monte Cimone (2165 m a.s.l.), a key site for monitoring atmospheric processes in the Mediterranean. We analyze particle size distributions and new particle formation (NPF) events, revealing interannual, seasonal, and diurnal trends. Additionally, we examine how meteorological conditions, chemical precursors like sulfur dioxide, and proxies such as VOCs and BC for different emission sources influence particle dynamics and NPF. To assess the role of transport, we integrate FLEXPART backward simulations to trace air mass origins (marine/continental/regional) and evaluate the impact of long-range transport on aerosol properties at CMN.
2:30pm - 2:45pmTU3-3: 4
Tethered Balloon Measurements of Arctic Ultrafine Aerosol Particles During Melting Season 2024
Mona Kellermann1, Birgit Wehner1, Christian Pilz1, Matthew Boyer4, Lutz Bretschneider2, Thomas Conrath1, Barbara Harm-Altstädter2, Dominic Heslin-Rees5, Ralf Käthner1, Radovan Krejci5, Astrid Lampert2, Marion Maturilli3, Christoph Ritter3, Andreas Schlerf2, Malte Schuchard2, Konrad Bärfuss2
1Leibniz Institute of Tropospheric Research (TROPOS); 2Institute of Flight Guidance, Technische Universität Braunschweig,; 3Physics of the Atmosphere, Alfred Wegener Institute; 4Institute for Atmospheric and Earth System Research (INAR), University of Helsinki; 5Department of Environmental Science, Stockholm University, Stockholm,
New Particle Formation (NPF) is a major source of Arctic ultrafine particles (UFP), yet its vertical distribution and drivers remain unclear. This study presents balloon-borne observations of UFP during the 2024 melting season at Ny-Ålesund, Svalbard. Using condensation particle counters and a mobility particle sizer, 45 measurement flights revealed altitude-dependent UFP variability, influenced by temperature, radiation, and wind. Case studies highlight diurnal variations and elevated concentrations between clouds, suggesting in situ NPF. These findings enhance understanding of Arctic aerosol dynamics, improving atmospheric models and climate predictions.
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