Abollino, O.

Giacomino, A.

Giordano, A.

Inaudi, P.

Malandrino, M.

English

Institutional Research Information System University of Turin

  Characterization and temporal evolution of the inorganic component of PM10 collected near to Ny-Ålesund (Norwegian Arctic)  E. Conca1, O. Abollino2, A. Giacomino2, P. Inaudi2, A. Giordano1, S. Becagli3, R. Traversi3 and M. Malandrino1  1Department of Chemistry, University of Turin, Turin, 10125, Italy 2Department of Drug Science and Technology, University of Turin, Turin, 10125, Italy 3Department of Chemistry “Ugo Schiff”, University of Florence, Sesto Fiorentino, 50019, Italy Keywords:   Norwegian Arctic, Ny-Ålesund, PM10, elemental composition, chemometric treatments. Presenting author email: eleonora.conca@unito.it  The chemical composition of atmospheric particulate matter (PM) has a strong variability, as it is heavily influenced by environmental conditions (season, weather and geographical area) and human activities. Conversely, PM composition is able to strongly influence the climate changes, by altering cloud formation and the radiative balance of the atmosphere. This is particularly true for the polar regions, as they play a key role in regulating the global climate systems, by means of complex feedback mechanisms. For this reason, the identification of local and global sources and the under-standing of transport mechanisms and deposition processes of polar PM has a great importance (Conca, 2019). This study investigated the inorganic composition of PM10 samples collected in a polar environment (Ny-Ålesund, Norwegian Arctic) in spring and summer 2010-2016. The purposes were the identification of the PM sources and the understanding of the short- and long-range transport processes taking place in the area, their possible future evolution and their effects on the radiative balance of the atmosphere. The calculation of crustal and marine enrichment factors allowed a first subdivision of analytes according to their primary source (crustal, marine or anthropogenic). Principal Component Analysis, Hierarchical Cluster Analysis and Factor Analysis allowed the identification of specific sources and the study of the seasonal variability of samples. The results evidence a remarkable seasonal trend for most of the investigated elements. This was particularly evident for 2012 samples, as shown in Figure 1. For both geogenic and anthropogenic elements, concentrations are generally higher in March and April. In this period the ground is almost entirely covered by snow and ice, suggesting that long-range transport processes might be taking place. On the other hand, the concentration of elements typically deriving from the marine aerosol (i.e. K, Mg, Na) present a peak in late spring and summer, together with Co, Ni and V, typical anthropogenic analytes related to ship emissions (Becagli, 2017). By comparing data obtained for Ny-Ålesund with data registered by other researchers on PM10 collected in industrial, urban, and rural areas all over the world, it emerges that the concentrations obtained in this study are, for most of the analytes, the lowest; this is true not only for anthropogenic elements but also for geogenic ones, as the snow and ice covering the ground for most of the year prevent the local soil dust resuspension. As expected, the concentrations registered for PM10 collected in Terra Nova Bay (Antarctica) are generally similar to the ones obtained in this study.      Figure 1. Score plot for 2012 samples.  This research was supported by the National “Dirigibile Italia” and “ARCTICA” Research Programs (PRIN07 and PRIN09). We are grateful to the Italian participants to the 2010-2016 expeditions for carrying out the samplings.  Conca, E., Abollino, O., Giacomino, A., Buoso, S., Traversi R., Becagli, S., Grotti, M. and Malandrino, M. (2019) Atmospheric Environment, 203, 153-165. Becagli, S., Anello, F., Bommarito, C., Cassola, F., Calzolai, G., Di Iorio, T., Di Sarra, A., Gómez-Amo, J.L., Lucarelli, F., Marconi, M., Meloni, D., Monteleone, F., Nava, S., Pace, G., Severi, M., Sferlazzo, D.M., Traversi, R., and Udisti, R. (2017) Atmospheric Chemistry and Physics, 17, 2067-2084. Summer   Spring 

Characterization and temporal evolution of the inorganic component of PM10 collected near to Ny-Ålesund (Norwegian Arctic)

https://iris.unito.it/bitstream/2318/1885390/1/2020_EAC_Conca_Poster.pdf

Characterization and temporal evolution of the inorganic component of PM10 collected near to Ny-Ålesund (Norwegian Arctic)

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