10:15am - 10:30amTU1-5: 1
New particle formation and its contribution to cloud condensation nuclei in the Eastern Mediterranean: Insights from the Spring Particles in Cyprus campaign
Marije van den Born1, Spyros Bezantakos2, Vijay Kanawade2, Neha Deot2, George Biskos2, Tuija Jokinen2, Ulrike Dusek1
1Centre for Isotope Research (CIO), Energy and Sustainability Research Institute Groningen (ESRIG), University of Groningen, Groningen, the Netherlands; 2Climate and Atmosphere Reserach Center (CARE-C), The Cyprus Institute, Nicosia, Cyprus
New particle formation is a key source of CCN, influencing cloud properties and climate. In this study we provide insights into NPF driven CCN production in Cyprus. Our findings indicate that CCN enhancement occured on 80% of the NPF days observed during the SPICY campaign in Cyprus in spring 2024, exhibiting a factor 2 concentration increase on average. On non-event days, no CCN concentration enhancement was observed. These results highlight the role of NPF in enhancing CCN concentrations in the eastern Mediterranean during spring, with potential implications for regional cloud microphysics and climate.
10:30am - 10:45amTU1-5: 2
Cloud-Aerosol Interactions under high reactive Nitrogen concentrations– First highlights from the CAINA project
Ulrike Dusek1, Jinglan Fu1,2, Xinya Liu1, Harald Saathoff2, Willem Kroese3, Rupert Holzinger3, Juliane Fry4, Birgit Wehner5, Herman Russchenberg6, George Biskos7, Tuija Jokinen7, Johannes Schneider8
1Centre of Isotope Research, University of Groningen, Groningen, the Netherlands; 2Institute of Meteorology and Climate Research-Atmospheric Aerosol Research (IMK-AAF), Karlsruhe Institute of Technology, Karlsruhe, Germany; 3Institute for Marine and Atmospheric research Utrecht (IMAU), Utrecht University, Utrecht, The Netherlands; 4Meteorology and Air Quality, Wageningen University and Research, Wageningen, the Netherlands; 5Department of Atmospheric Microphysics, Leibniz Institute for Tropospheric Research, Leipzig, Germany; 6Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, the Netherlands; 7Climate and Atmosphere Research Center (CARE-C), The Cyprus Institute, Nicosia, Cyprus; 8Particle Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
The CAINA project investigates multiple aspects of aerosol-cloud interactions under high reactive nitrogen concentrations, combining ambient, chamber, and modeling studies. First highlights include:
2-year measurements show strong new particle formation and growth to CCN sizes at two contrasting sites in the Netherlands.
Studies at the AIDA chamber show that SOA mass yields are strongly enhanced at 90% RH compared to dry conditions, with strong evidence for aqueous SOA formation. At 90% RH the SOA composition clearly depends on inorganic components in the solution droplets with NH4NO3 enhancing production of oxalic and malonic acid, as well as nitrogen-containing organics.
10:45am - 11:00amTU1-5: 3
Determining the size-resolved cloud condensation nuclei in the urban atmosphere
Máté Vörösmarty1, Silvia Henning2, Imre Salma3
1Hevesy György PhD School of Chemsitry, Eötvös Loránd University, Budapest, Hungary; 2Atmospheric Microphysics, Leibniz-Institute of Tropospheric Research, Leipzig, 04318 Germany; 3Department of Chemsitry, Eötvös Loránd University, Budapest, Hungary
We present and interpret the findings from our size-resolved cloud condensation nuclei measurements from Budapest. The system has been running since August, 2024, so far, six months of data have been collected. We observed different atmospheric events deviating from the average, normal environments, like fireworks, regional and localized nucleation originating from flooding, running races and the washing-out effect from raining.
11:00am - 11:15amTU1-5: 4
Harmonized 10-site aerosol data set to improve understanding and prediction of global cloud condensation nuclei
Ines Zabala1,2, Juan Andrés Casquero-Vera1,2, Elisabeth Andrews3,4, Gerardo Carrillo-Cardenas5, Anna Gannet Hallar5, Gloria Titos1,2
1Andalusian Institute for Earth System Research IISTA, University of Granada, Spain; 2Department of Applied Physics, Faculty of Sciences, University of Granada, Spain; 3CIRES, University of Colorado, Boulder, CO, United States; 4Global Monitoring Laboratory, NOAA, Boulder, CO, United States; 5Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT, United States
This study presents a quality-assured, long-term database of CCN concentration, activation properties, particle number size distribution, chemical composition and optical properties from 10 DOE ARM sites. The data reveal significant spatial and temporal variability in aerosol properties influenced by local environments and specific sources. To address CCN data gaps, we evaluate CCN predictive models using chemical and optical properties. A new model capable of estimating CCN concentrations from common optical measurements is presented, aiding climate modelling and reducing ACI uncertainty.
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