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Thanks to its insolubility, mineral dust is considered a stable proxy in polar ice cores. With this study we show that below an ice-depth of 1000 m, the Talos Dome ice core (Ross Sea sector of East Antarctica) presents evident and progressive signs of post-depositional processes affecting the mineral dust records. We applied a suite of established and cutting edge techniques to investigate the properties of dust present in the Talos Dome ice core, ranging from concentration and grain-size to elemental-composition and Fe-mineralogy. Results show that through acidic/oxidative weathering, the conditions of deep ice at Talos Dome promote the dissolution of specific minerals and the englacial formation of others, deeply affecting dust primitive features. The expulsion of acidic atmospheric species from ice-grains and their concentration in localized environments is likely the main process responsible for englacial reactions and is related with ice re-crystallization. Deep ice can be seen as a "geochemical reactor" capable of fostering complex reactions which involve both soluble and insoluble impurities. Fe-bearing minerals can efficiently be used to explore such transformations.

In this work we present the isotopic, chemical and dust stratigraphies of two snow pits sampled in 2013/14at GV7 (coastal East Antarctica: 70°41′ S - 158°51′ E, 1950 m a.s.l.). A large number of chemical species are measured aiming to study their potentiality as environmental changes markers. Seasonal cluster backward trajectories analysis was performed and compared with chemical marker stratigraphies. Sea spray aerosol is delivered to the sampling site together with snow precipitation especially in autumn-winter by air masses arising from Western Pacific Ocean sector. Dust show maximum concentration in spring when the air masses arising from Ross Sea sector mobilize mineral dust from ice-free areas of the Transantarctic mountains. The clear seasonal pattern of sulfur oxidized compounds allows the dating of the snow-pit and the calculation of the mean accumulation rate, which is 242±71mm w.e. for the period 2008–2013. Methanesulfonic acid and NO3− do not show any concentration decreasing trend as depth increases, also considering a 12m firn core record. Therefore these two compounds are not affected by post-depositional processes at this site and can be considered reliable markers for past environmental changes reconstruction. The rBC snow-pit record shows the highest values in summer 2012 likely related to large biomass burning even occurred in Australia in this summer. The undisturbed accumulation rate for this site is demonstrated by the agreement between the chemical stratigraphies and the annual accumulation rate of the two snow-pits analysed in Italian and Korean laboratories.

L’analisi parallela delle opere di quattro scrittrici della migrazione consente di individuare, nella singolarità delle scritture, una circolarità di discorso sui temi del viaggio e dello spaesamento, del racconto e della lingua.. Il saggio mette in evidenza come lo «statuto relazionale dell’identità» viva in rapporto a quello dell’alterità e si configuri come un’identità multipla che si realizza in uno spazio mobile. Il lungo viaggio di Gabriella Ghermandi, Cristina Ali Farah, Igiaba Scego e Ornela Vorpsi illustra, con diversi esiti, la trasformazione del tema dell’esilio in quello della perenne erranza. Dalla loro esperienza della migrazione, dalla loro condizione nomade, emergono narrazioni inedite che gettano uno sguardo straniato sul mondo. Tra Italia ed Etiopia, tra Italia, Somalia e Albania e altre stazioni di transito si muovono personaggi da un mondo all’altro ciascuno mosso da dolorose motivazioni. E attraverso le loro peregrinazioni si disegnano tante mappe ibride in cui la lingua assume il ruolo di dimora vitale. Essa, attingendo dalla pratica dell’ascolto e dell’incontro, consegna i depositi della memoria insieme ai rilevamenti del presente. A comparative analysis of the works of four migrant writers enables us to identify, within individual writings, a circularity of discourse on the topics of journey, displacement, nar-ration and language. The essay highlights how the ‘relational status of identity’ exists in relation-ship to otherness and is defined as a multiple identity shaped in a mobile space. The long journey of Gabriella Ghermandi, Cristina Ali Farah, Igiaba Scego and Ornela Vorpsi illustrates, with differ-ent outcomes, how the topic of exile is transformed into ceaseless erring. From their experience with migration, from their nomadic condition, unknown narrations emerge casting an estranged glance on reality. Between Italy and Ethiopia, Italy, Somalia and Albania, and other transit sta-tions, characters move from one world to the next, all animated by painful motivations. Through their wandering, they trace a number of hybrid maps in which language becomes a vital home. Such home, drawing from the practice of listening and from encounters, delivers its memory deposits together with mappings of the presen

Il saggio indaga le modalità con cui Bufalino indirizza e controlla a distanza il processo di lettura delle proprie opere, Congegnando un intrigante gioco di specchi, di rifrazioni e di mise en abyme, l’autore inserisce all’interno della narrazione episodi e apologhi allegorici, che compendiano in sé l’intero senso del racconto e mettono in scene figure di lettori. L’attenzione del lettore, messa in allerta dalle spie disseminate a bella posta nel testo, è convogliata spesso su una traiettoria per certi versi ‘obbligata’: muovendo dagli indizi predisposti con avvedutezza dal narratore l’interpretazione si concentra giocoforza su certi nodi significativi, mettendo da parte gli altri, eventuali spunti percorribili. The essay investigates the ways in which Bufalino directs and remotely controls the process of reading his own works. By assigning an intriguing game of mirrors, refractions and mise en abyme, the author inserts allegorical episodes and apologues into the narration, that summarize in themselves the whole sense of the story and bring together figures of readers. The attention of the reader, put on alert by the spies disseminated in the text, is often conveyed on a trajectory in some ways 'obliged': moving from the clues predisposed with shrewdness by the narrator the interpretation is concentrated on certain significant nodes, setting aside the others, any possible hints.