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1367. Equal abundance of summertime natural and wintertime anthropogenic Arctic organic aerosolsVaios Moschos, Katja Dzepina, Deepika Bhattu, Houssni Lamkaddam, Roberto Casotto, Kaspar R. Daellenbach, Francesco Canonaco, Pragati Rai, Wenche Aas, Silvia Becagli, Giulia Calzolai, Konstantinos Eleftheriadis, Claire E. Moffett, Jürgen Schnelle-Kreis, Mirko Severi, Sangeeta Sharma, Henrik Skov, Mika Vestenius, Wendy Zhang, Hannele Hakola, Heidi Hellén, Lin Huang, Jean-Luc Jaffrezo, Andreas Massling, Jakob K. Nøjgaard, Tuuka Petäjä, Olga Popovicheva, Rebecca J. Sheesley, Rita Traversi, Karl Espen Yttri, Julia Schmale, André S. H. Prévôt, Urs Baltensperger, Imad El Haddad, 2022, original scientific article Abstract: Aerosols play an important yet uncertain role in modulating the radiation balance of the sensitive Arctic atmosphere. Organic aerosol is one of the most abundant, yet least understood, fractions of the Arctic aerosol mass. Here we use data from eight observatories that represent the entire Arctic to reveal the annual cycles in anthropogenic and biogenic sources of organic aerosol. We show that during winter, the organic aerosol in the Arctic is dominated by anthropogenic emissions, mainly from Eurasia, which consist of both direct combustion emissions and long-range transported, aged pollution. In summer, the decreasing anthropogenic pollution is replaced by natural emissions. These include marine secondary, biogenic secondary and primary biological emissions, which have the potential to be important to Arctic climate by modifying the cloud condensation nuclei properties and acting as ice-nucleating particles. Their source strength or atmospheric processing is sensitive to nutrient availability, solar radiation, temperature and snow cover. Our results provide a comprehensive understanding of the current pan-Arctic organic aerosol, which can be used to support modelling efforts that aim to quantify the climate impacts of emissions in this sensitive region.
Keywords: Arctic, Organic aerosols, Emission sources, Climate change
Published in RUNG: 01.03.2022; Views: 1598; Downloads: 0
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1369. Literary foremothers : women writers in dialogue with tradition of their ownKatja Mihurko, 2021, reviewed university, higher education or higher vocational education textbook Abstract: The textbook introduces works by Sappho, Christine de Pizan, Aphra Behn, Maria Edgeworth, Jane Austen, Charlotte Brontë, George Eliot, George Sand, Caroline Norton, Elizabeth Barrett Browning, Emily Dickinson, Laura Marholm, Amalie Skram, Virginia Woolf and Amy Lowell. Some of these authors are presented as the role-models, the others as writers looking for their own female tradition and finding it in the writings of their literary foremothers. These responses - in form of poems, extracts from essays and novels - are included in the textbook and enriched with comments, interpretations and tasks for students. In the introduction, the question of female literary tradition is discussed by presenting various theoretical answers from distinguished feminist scholars.
Published in RUNG: 01.03.2022; Views: 1715; Downloads: 95
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