Variabilité et fréquence des cycles de gel‐dégel dans la région de Québec, 1977–2006

Freeze‐thaw cycles are most common at the beginning or near the end of the winter season. These cycles have various effects on the ecosystems of Eastern Canada, affecting both biotic and abiotic components of temperate cold environments. Using air temperature minima and maxima from four meteorological stations close to Québec City, we determined the frequency of daily freeze‐thaw cycles for the last 30 years. The results show no significant increase in the number of freeze‐thaw cycles despite a small increase in air temperature. Polynomial curves describing the relationship between mean air temperatures and the number of freeze‐thaw cycles were calculated. Based on these equations and anticipating a climate change scenario, we projected future freeze‐thaw cycles. Assuming a 5 °C increase in mean air temperatures by 2100, we estimated that the number of days with a freeze‐thaw cycle could increase by approximately 20 days per winter. The increase in the number of such cycles will be concentrated during the coldest months of the winter (January and February).     

La frontière asymétrique : Franco‐Ontariens et Anglo‐Québécois dans la région de la capitale nationale

The francophone and anglophone minorities of Gatineau‐Ottawa appear to benefit from a privileged location. Living very close to their respective majorities, they simply have to cross the border in order to access resources to live in their own language and share their culture. However, a qualitative analysis of the discourse by Anglo‐Quebeckers and Franco‐Ontarians about their everyday life in the Nation's Capital Region shows that the border has more complex and often contradictory effects. In this article, we focus our attention on four particular manifestations of the border: (1) the border is transparent so that one can cross the Ottawa River without hindrance in certain contexts yet rather opaque in others; (2) one may transcend minority status through the strategic use of the border; (3) it creates a multi‐topic imaginary geography in which the border itself often becomes mobile; and (4) finally, the border can act as a mirror when the cross‐cultural intermixing it allows causes the Anglo‐Quebeckers and Franco‐Ontarians to question their identities, a questioning which would not be as intense in the absence of the border. The comparison of these two minorities makes it possible to highlight the asymmetrical nature of the effects of the border on their everyday life, identities, and sense of belonging.     

La représentation de l’espace public par la photographie : Une étude de cas dans la région de Montréal (Québec,Canada)

Beyond the material forms that constitute public space, it is subject to representations or images that shape the types of use, forms of appropriation, and general perception that people have of it. Following a centre‐periphery gradient that allows us to compare three zones of the Montreal region (pericentral, periurban, and the northern ring), we analyzed photographs available within cyberspace (from different municipalities and boroughs, local newspapers, and social media) to draw out representations of public space. What can photographs available online tell us about how space is perceived? We have established a typology of images of public space (idyllic nature, urban scene, festive space, empty space, family portrait) that are representative of the overall corpus studied. We have compared these results with a correspondence analysis to clarify the structure of interaction between the variables. The analysis demonstrates that the representations are more differentiated between neighbourhoods than between regions, and that while newspapers and municipalities represent more themes of sociability and family life, social media shows more empty spaces, whether they be monumental spaces, or spaces of daily life.