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ORganiC Aerosol Chemical characterization and Source Apportionment (ORCA)
Call year: 2018
Status: active
IADC_id: 107
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Project description:
Atmospheric aerosol has serious negative impacts on human health and large, but still uncertain, effects on climate. The climate of the Arctic is changing faster than almost elsewhere. Overall, our understanding of climate-relevant aerosol sources, formation processes and size distributions in the remote Arctic region remains incomplete, in part due to the scarcity of long term observations and appropriate methodologies for data interpretation.rnAtmospheric particles have a wide variety of sources, and this is reflected in their highly varying chemical composition. Observations made around the world show that organic material often represent a major fraction of the fine aerosol mass (10-90% of PM1). This Organic Aerosol (OA) is demonstrated to have a very important role also in the formation of new particles (nucleation) and in their evolution to Cloud Condensation Nuclei (CCN), further affecting aerosol climate-relevant properties.rnThe present activity aims to characterize physical and chemical features of the atmospheric organic aerosols sampled at Ny-Ålesund and to assess their main sources and their impact on the direct and indirect radiative effect. The activity would be complementary with the already deployed characterization of inorganic and elemental composition of atmospheric aerosol carried out by the University of Florence (UNIF) in the last years.
National/International Cooperation:
Collaboration between the Institute of Atmospheric Science and Climate, ISAC, of the National Research Council of Italy (CNR) and the Florence University, already operative at “Dirigibile Italia” station. Moreover this collaboration will place into the broader network of international and interdisciplinary collaborations already existing at Ny-Ålesund research site.
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