10:15am - 10:30amTH1-3: 1
Measurements of absorption and scattering optical properties for aerosol typing: A one-year long study in Milan (Italy)
Rimoldi Stefano1, Acton-Bond Marcus1, Valli Gianluigi1, Bernardoni Vera1, Colombi Cristina2, Cosenza Rosario2, Vecchi Roberta1
1Università degli Studi di Milano, Italy; 2Arpa Lombardia, Italy
Aerosol absorption and scattering coefficients were measured continuously in Milan for 1-year. Scattering data are the first ones obtained in Milan (Italy) and are still scarce in urban environments. From the Absorption and Scattering Angstrom Exponents provided information on the fossil fuel vs. wood burning presence as well as on particle-size dependence, respectively. An optical source apportionment was performed through the revised MWAA Model combined with the Aethalometer Model. In addition, absorption and scattering measurements were combined to retrieve aerosol typing (e.g. Saharan dust, local soil dust resuspension, wood burning, fossil fuel emissions).
10:30am - 10:45amTH1-3: 2
Primary and secondary brown carbon, fossil fuel and biomass burning Heating Rate from a urban to a rural site in the Po Valley
Luca Ferrero1, Martin Rigler2, Asta Gregorič2,3, Matic Ivančič2, Sergio Cogliati1, Niccolò Losi1, Andrea Doldi1, Sofia Cerri1, Luca D'Angelo4, Julia David4, Alexander Vogel4
1GEMMA Center, University of Milano-Bicocca, 20126, Milano, Italy; 2Aerosol d.o.o., Kamniška 39A, SI-1000 Ljubljana, Slovenia.; 3Center for Atmospheric Research, University of Nova Gorica, SI-5270 Ajdovščina, Slovenia; 4Institute for Atmospheric and Environmental Sciences, Goethe-University Frankfurt, Frankfurt am Main, Germany
The abstract reports experimental measurements of atrmospheric heating rate induced by light absorbing aerosol. These measurements were collected in the Po Valley at a urban (Milano) and rural site (Schivenoglia) during 2023. Measurements were collected at 1 min time resulution in any sky condition. Source and species apportionment of light absorbing aerosol allowed to determine the contribution of fossil fuel, biomass burning, black carbon and brown carbon on the heating rate. Moreover, brown carbon was apportioned between primary and secondary origin highlighting the climatic effect of both contribution in the atmosphere.
10:45am - 11:00amTH1-3: 3
High-resolution measurements of mineral dust light absorption
Tommaso Isolabella1,2, Clarissa Baldo3, Marco Brunoldi1,2, Mathieu Cazaunau3, Claudia Di Biagio4, Paola Formenti4, Federico Mazzei1,2, Edouard Pangui3, Paolo Prati1,2, Franco Parodi2, Bénédicte Picquet-Varrault3, Virginia Vernocchi2, Dario Massabò1,2
1Department of Physics, University of Genoa, Genoa, 16146, Italy; 2Division of Genoa, National Institute of Nuclear Physics (INFN), Genoa, 16146, Italy; 3Univ Paris Est Creteil and Université Paris Cité, CNRS, LISA, F-94010 Créteil, France; 4Université Paris Cité and Univ Paris Est Creteil, CNRS, LISA, F-75013 Paris, France
This study uses BLAnCA, an innovative, high-resolution laboratory instrument, to measure spectral absorption across the UV-NIR range of mineral dust samples from several arid areas around the world. The measurements reveal distinct optical properties tied to mineral composition.
11:00am - 11:15amTH1-3: 4
Characterizing the absorption and heating rate of BC and Mineral dust across urban and remote Mediterranean sites
Sangita Gautam1, Marco Pandolfi2, Noemi Perez2, Andres Alastuey2, Matic Ivančič3, Asta Gregorič3, Irena Ježek3, Martin Rigler3, Luka Drinovec1, Jesus Yus Diez1, Griša Močnik1
1Center for Atmospheric Science, University of Nova Gorica, Ajdovščina, Slovenia; 2Institute of Environmental Diagnostics and Water Research, IDAEA-CSIC, Barcelona, Spain; 3Aerosol d.o.o., Ljubljana, Slovenia
This study was conducted at three distinct locations in Spain, representing different atmospheric environments: an urban site in Barcelona (77 m a.s.l.), a regional background site in Montseny (720 m a.s.l.), and a continental site in Montsec (1600 m a.s.l.). The primary objective of this research is to characterize the absorption properties and heating rates of black carbon (BC) and mineral dust (MD), with respect to their size distribution.
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