Spatial and temporal dynamics of the urban heat island effect in a small Brazilian city

This study examined the spatial and temporal patterns of the canopy layer urban heat islands (UHI_UCL) in a small city in southeastern Brazil using the local climate zone (LCZ) system. We analysed the influence of weather conditions, LCZs characteristics, and local surface relief on the UHI_UCL magnitudes. Mobile traverses were used to measure air temperatures during representative nights of wet and dry seasons. Daily maximum magnitudes were observed in compact classes (LCZs 3 and 7) under ideal weather conditions (dry, clear skies, and calm) and higher anthropogenic heat release (weekdays). Seasonal effects on LCZ thermal differences were negligible. The peripheral landscapes were warmer than the city centre in both seasons. Among the warmer areas in the city, magnitudes in compact LCZs 3 and 7 were consistently higher than in LCZ 6. In general, representative sites of the main ‘built’ LCZs in the study area exhibit similar inter-zone temperature patterns to those reported for cities of different sizes from tropical and midlatitude regions. Thermal contrasts of ΔT_{LCZ 3 − D} in the study area reveal significant evidence that small cities can have as strong heat islands as bigger cities. These findings highlight the importance of the LCZ system to identify the main controlling factors driving such thermal differences and the need to extend the application of this approach in other South American cities to yield systematic data of UHI_UCL for urban planning given the coming challenges of climate change over the region.     

SHADOWS OF PLANNING: ON LANDSCAPE/PLANNING HISTORY AND INHERITED LANDSCAPE AMBIGUITIES AT THE URBAN FRINGE

The history of vernacular landscapes at the urban fringe is poorly studied, limiting our understanding of the contemporary character of the fringe and our knowledge of the urbanization process. This article argues the necessity of a combined analysis of the legacies of planning and the footprints of former landscape ideals in order to understand the conditions for spatial planning at the urban fringe. After first introducing the methodological use of landscape/planning history, the article focuses on the Swedish discourse on landscape change and landscape planning concerning the urban fringe in the 1930s. Particular focus is placed on the discourse on agricultural landscapes at the urban fringe. The third section of the article presents an examination of the footprints of the ‘landscape convention’ (i.e. an agreement on the meaning of landscape in relation to law and justice) resulting from the landscape discourse of the 1930s. The article argues that the legacy of the 1930s explains some of the difficulties arising when planners of today aim to utilize the farm landscape as a resource for recreation at the urban fringe. The shadow of the landscape discourse of the 1930s also creates difficulties in dealing with peri‐urban landscapes in Swedish planning and Swedish law. With the ongoing discourse on how to implement the European Landscape Convention, such knowledge is particularly useful.     

Uses of Gypsum in Spanish architectural heritage: Typologies and some unique construction techniques

ABSTRACT

In Spain, gypsum and its many typologies play an important role as a construction material in Spanish architectural heritage. Its historical use is mainly a direct consequence of the abundance of gypsum deposits and a constructive tradition which began in ancient times. In addition to being a sign of constructive identity, gypsum is a clear example of the strong link between traditional architecture and the natural resources of the territory. The aim of this article is after to identify gypsum deposits and gypsum architectural heritage found in different parts of Spain and to explain the different gypsum typologies—other than powdered gypsum—used. Finally, the most unique construction techniques are described, differentiating between structural elements, partitions, and enclosures, as well as architectural elements and surface finishes.     

Tweet Justice: The Canadian Court’s Use of Social Media

ABSTRACT

Like other political institutions in Canada, the judiciary has entered the digital age. Indeed, Canadian courts have been using Twitter for almost a decade. Despite this, there has been very little systematic examination of how Canadian courts use Twitter and the nature of the content they produce. While digital technologies create new challenges for all political actors, this is especially so for the courts, which exist in a very “traditional and conservative environment”. In this research note, we develop a framework for analyzing court-produced content on social media. This framework draws from concepts from digital politics and legal studies. We then apply this framework by conducting a content analysis of tweets from active court Twitter feeds in Canada.     

RAPID REGIONAL ENLARGEMENT IN SWEDEN: A PHENOMENON MISSING AN EXPLANATION

According to Swedish register data, regional size and the extent of commuting have both increased rapidly in recent decades. From the perspective of policy-making authorities, this would indicate good prospects for regional development, as small regions could be integrated into larger ones resulting in increased economic growth. However, there are few concrete manifestations of such regional enlargement, and alternative datasets give other impressions of the effects of commuting. Here we argue that this apparent growth might stem from several problems inherent in a register-based way of measuring changes in commuting patterns. Thus, regional enlargement and the extent of commuting may be exaggerated when measured conventionally, and the high hopes of using such enlargement to lever regional development might be misplaced. More generally, this study considers the problems arising as census or other enquiry and interview based data are replaced by register data.