Variability and trends of downward surface global solar radiation over the Iberian Peninsula based on ERA-40 reanalysis

A climate study of the incidence of downward surface global solar radiation (SSRD) in the Iberian Peninsula (IP) based primarily on ERA-40 reanalysis is presented. NCEP/NCAR reanalysis and ground-based records from several Portuguese and Spanish stations have been also considered. The results showthat reanalysis can capture a similar inter-annual variability as compared to ground-based observations, especially on a monthly basis, even though annual ERA-40 (NCEP/NCAR) values tend to underestimate (overestimate) the observations with a mean relative difference of around 20Wm–2 (40Wm–2). On the other hand, ground-based measurements in Portuguese stations during the period 1964–1989 show a tendency to decrease until the mid-1970s followed by an increase up to the end of the study period, in line with the dimming/brightening phenomenon reported in the literature. Nevertheless, there are different temporal behaviours as a greater increase since the 1970s is observed in the south and less industrialized regions. Similarly, the ERA-40 reanalysis shows a noticeable decrease until the early 1970s followed by a slight increase up to the end of the 1990s, suggesting a dimming/brightening transition around the early 1970s, earlier in the south and centre and later in the north of the IP. Although there are slight differences in the magnitude of the trends as well as the turning year of the dimming/brightening periods, the decadal changes of ERA-40 fairly agree with the ground-based observations in Portugal and Spain, in contrast to most of the literature for other regions of the world, and is used in the climatology of the SSRD in the study area. NCEP/NCAR reanalysis does not capture the decadal variations of SSRD in the IP. The results show that part of the decadal variability of the global radiation in the IP is related to changes in cloud cover (represented in ERA-40).

Trandisciplinarity and Design: Comparative Review and Synthesis for the Design Process

Transdisciplinarity gained importance in the 1970s, with the initial signs of weakness of both multi- and interdisciplinary approaches. This weakness was felt due to the increased complexity in the social and technological landscapes. Generally, discussion over the transdisciplinary topic is centred in social and health sciences. Therefore, the major challenge in this research is to adapt design research to the emerging transdisciplinary discussion. Based on a comparative and critical review of several engineering and design models for the design process, we advocate the importance of collaboration and conceptualisation for these disciplines. Therefore, a transdisciplinary and conceptual cooperation between engineering and industrial design disciplines is considered as decisive to create breakthroughs. Furthermore, a synthesis is proposed, in order to foster the cooperation between engineering and industrial design.

"Os Conflitos ambientais em Portugal (1974-2015): uma breve retrospectiva"

In this chapter, the authors made a survey of the research undertaken by social scientists and their reflections on environmental conflicts in Portugal. In these, a critical discourse has emerged concerning, on the one hand, the weak public environmental awareness, and, on the other, the progressive obliteration of environmental movements and their institutionalization throughout the creation of different environmental groups and the incorporation of the “environment” in legislation and in political discourse. In a brief retrospective, we review several conflicts taking into account different relevant factors: level of mobilization, media attention received, organization, impact, and ideological reference they have had in Portugal since the seventies. We have particularly highlighted the movement against nuclear energy and the construction of dams, the pollution caused by intensive breeding, the expansion of eucalyptus plantations, the conflicts against “wild” forms of mining, the business of toxic waste, the expansion of the economy of the concrete, the installation of landfills, and the defense of the natural heritage. This survey has considered three periods: the 1970s, marked by the emergence and performance of ecological movements of different ideological extraction; the second half of the 1980s, marked by the institutionalization of the environment and the imposition of a new legal framework with impact on environmental policies resulting from the integration into the European Economic Community; and finally, a third period, from the 1990s to present, marked by increasing environmental media coverage, with a particular emphasis on environmental conflicts in a context of an increasing liberalization of economic activities and the expansion of extraction and of the concrete economy. This is also the period where the environment emerges in disputes over the uses of the territory as economic and asset value. Most of these conflicts arise from the activities of local agents or national environmental groups that quickly gain strong local roots and sometimes even have some success. However, their impact on the national and Community legislation seems to be less relevant.

Revisiting compressed air energy storage.

The use of renewable energies as a response to the EU targets defined for 2030 Climate Change and Energy has been increasing. Also non-dispatchable and intermittent renewable energies like wind and solar cannot generally match supply and demand, which can also cause some problems in the grid. So, the increased interest in energy storage has evolved and there is nowadays an urgent need for larger energy storage capacity. Compressed Air Energy Storage (CAES) is a proven technology for storing large quantities of electrical energy in the form of high-pressure air for later use when electricity is needed. It exists since the 1970’s and is one of the few energy storage technologies suitable for long duration (tens of hours) and utility scale (hundreds to thousands of MW) applications. It is also one of the most cost-effective solutions for large to small scale storage applications. Compressed Air Energy Storage can be integrated and bring advantages to different levels of the electric system, from the Generation level, to the Transmission and Distribution levels, so in this paper a revisit of CAES is done in order to better understand what and how it can be used for our modern needs of energy storage.

Inventário e análise sociológica das políticas públicas de turismo em Angola

As políticas públicas na área do turismo tornaram-se uma prioridade dos governos dos países desenvolvidos e menos desenvolvidos a partir da década de 1970, quando os organismos estatais ligados ao sector do turismo deram início à definição de amplas agendas nacionais para o desenvolvimento da indústria do turismo para períodos de longo prazo, com descrições claras sobre a posição que o turismo ocupa no âmbito do desenvolvimento da economia nacional; sobre as metas que se pretendem alcançar e a forma como elas serão atingidas. O enorme crescimento do turismo, o envolvimento dos governos e os impactos negativos do turismo que foram registados nos países em desenvolvimento ajudou a trazer ao debate académico a análise sobre as políticas públicas do turismo no final dos anos 80 e início de 90 do séc. passado. Neste estudo inventariou-se o quadro legislativo das políticas públicas do turismo em Angola e fez-se o enquadramento sociológico da Política Nacional e do Plano Diretor do turismo em Angola; identificaram-se os atores que intervêm na execução das políticas públicas do turismo em Angola e o seu sentido social, assim como os fatores centrais propiciadores do desenvolvimento social e económico em contexto local (Huíla). Isto permitiu determinar o perfil e tipologias resultantes da contribuição do quadro de Políticas Públicas de turismo para o nível de promoção do desenvolvimento social local em Angola, ajudando-nos a tentar perceber até que ponto as políticas públicas do turismo em Angola se constituem como fator de desenvolvimento social local. Partindo do perfil e tipologias resultantes da contribuição do quadro de Políticas Públicas de turismo e com base nos resultados obtidos através da análise de conteúdo das entrevistas, construiu-se uma proposta de modelo de políticas públicas de turismo propiciadoras do desenvolvimento local sustentável em Angola baseada numa lógica de ação coletiva, capaz de salvaguardar a sustentabilidade económica, política, social e territorial; ABSTRACT: Public policies in tourism became a priority of developed country governments and less developed countries from the 1970s, when the state bodies linked to the tourism sector began the definition of a broad national agenda for the development of the tourism industry for long-term periods, with clear descriptions of the position that tourism occupies in the national economic development; on the goals they want to achieve and how they will be achieved. The tremendous growth of tourism, the involvement of governments and the negative impacts of tourism were registered in developing countries and helped to bring the academic debate analysis on public tourism policies, in the late 80s and early 90s of the past century. In the legislative framework, we inventoried public tourism policies in Angola that later became the sociological framework of the National Policy and Plan for tourism in Angola; we identified the actors involved in the execution of public tourism policies in Angola and its social meaning, as well as the central factors conductive to social and economic development in the local context (Huila). This allowed to determine the profile and types resulting from the tourism Public Policy framework contribution to the level of promotion of local social development in Angola, helping us in this way to try to understand to what extent public tourism policies in Angola work as a local social development factor. From the profile and types resulting from the tourism Public Policy framework contribution and based on the results obtained from the interviews, we constructed a proposed model of public policies which encourage a more sustainable local development kind of tourism in Angola, based on a logic of collective action, able to safeguard the economic, political, social and territorial capitals.