O problema que mobilizou este trabalho passa pelo entendimento do que são Redes: o que pode uma rede? Como podem fazer funcionar a Vida? O que criam? Quais outras versões podem reinventar/diferenciar as noções habituais? O que implica produzir conhecimentos, sensações e afetos em rede? Como tais pesquisas e pensamentos em rede se abrem à experimentação de um futuro e uma humanidade por vir?

Greenhouse gas reduction and energy saving are becoming two important issues in both industrialized and developing countries, and policymakers are developing means to reduce total domestic energy use. We evaluate and compare the direct and the indirect energy use both in the People’s Republic of China (China) and the United States of America (US) by looking at a series of hybrid energy input–output tables (1997, 2002, and 2007). We also apply SDA (structural decomposition analysis), to identify the factors causing energy intensity (energy use per unit of gross domestic product) to differ between the two countries, which lead to potential energy-saving options. Our results show that, besides the differences in direct energy use, huge differences also exist in indirect energy use between the two countries. Differences in indirect energy use are mainly due to differences in technology. Technological change and industrial-structure change are key factors to explain the inequality of energy intensity, while there is a significant trend towards the convergence of sectoral energy efficiency between the two countries.

Fiz deste exercício textual, um jogo. Tudo porque fui instigado por Elaine Schmidlin (2013) a escrever sobre/com os postais remetidos pela pesquisadora para mim através do correio convencional. Cartões que habitam, entrelaçados à escrita, sua tese de doutorado. Eles foram tecidos por artistas visuais, que compuseram paisagens questionadoras dos modos de ensinar sobre/com arte. Este texto transitou entre tornar-se um parecer à referida tese (visto que fui membro titular da banca de avaliação) e um ensaio para ser apresentado no 19° Congresso de Leitura do Brasil (COLE). Considerei ser um feliz encontro este entre o parecer sobre/com a tese de Elaine e o texto a ser pensado para o referido evento. Um ensaio entre estes vastos mundos que me foram ofertados. Segui para esta composição escrita a sugestão de Milton José de Almeida (2009): “partir do caos aparente da imagem [do postal], encarar o mistério dos intervalos” (p. 36) entre os cortes, recortes, composições, montagens de um texto que está – neste presente momento em que você o está lendo – em edição.

Uma pesquisa etnográfica no sertão cearense, o conceito de mimese corpórea em produção teatral e um filme documentário sobre rastejadores de cangaceiros na caatinga do Ceará, Brasil, são pontos de partida, neste texto, para uma discussão sobre a natureza do processo de “leitura de sinais” no mundo. As reflexões apresentadas sugerem que tais processos sejam entendidos menos como interpretação ou decodificação, e mais como um saber mover-se, no qual o compartilhamento existencial – em especial, a ingestão de substâncias – é elemento fundamental. Os materiais analisados apontam, ainda, para o fato de que a direcionalidade implicada em tal saber mover-se é recorrentemente entendida como dimensão visceral. As vísceras, desse modo, transformam-se em locus privilegiado da experiência e ação no mundo, sendo superfície de contato e equipamento transformador ao mesmo tempo. Tal perspectiva traz novas e instigantes oportunidades à teoria social.

Processos globais como a perda de habitat, superexploração de recursos naturais, invasão biológica e mudanças climáticas estão conduzindo muitas espécies à extinção. Nesse cenário de alto risco de extinção, qual deve ser o critério para determinar prioridades de conservação? O que, onde e como proteger a biodiversidade? A resposta não é simples. Entre os efeitos esperados das mudanças climáticas, pode-se incluir o deslocamento das espécies para um espaço climático mais favorável, até mesmo fora de uma unidade de conservação. No entanto, eleger prioridades para a conservação da biodiversidade implica ir além das espécies, fazendo-se necessário a inclusão da história evolutiva e da manutenção dos processos nas comunidades. Aqui, apresentamos um panorama sobre os efeitos das mudanças climáticas sobre biodiversidade e como incluí-los em estudos de priorização espacial para a conservação. Ressaltamos a importância da conservação de anfíbios da Mata Atlântica, grupo mais ameaçado de extinção entre os vertebrados e, finalmente, apresentamos e discutimos estratégias de conservação consideram mais que a riqueza de espécies, incluindo também informações sobre a diversidade filogenética e funcional.

Wetlands cover approximately 6% of the Earth’s surface. They are frequently found at the interface between terrestrial and aquatic ecosystems and are strongly dependent on the water cycle. For this reason, wetlands are extremely vulnerable to the effects of climate change. Mangroves and floodplain ecosystems are some of the most important environments for the Amazonian population, as a source of proteins and income, and are thus the types of wetlands chosen for this review. Some of the main consequences that can be predicted from climate change for wetlands are modifications in hydrological regimes, which can cause intense droughts or inundations. A possible reduction in rainfall can cause a decrease of the areas of mangroves and floodplains, with a consequent decline in their species numbers. Conversely, an increase in rainfall would probably cause the substitution of plant species, which would not be able to survive under new conditions for a long period. An elevation in water temperature on the floodplains would cause an increase in frequency and duration of hypoxic or anoxic episodes, which might further lead to a reduction in growth rates or the reproductive success of many species. In mangroves, an increase in water temperature would influence the sea level, causing losses of these environments through coastal erosion processes. Therefore, climate change will likely cause the loss of, or reduction in, Amazonian wetlands and will challenge the adaptability of species, composition and distribution, which will probably have consequences for the human population that depend on them.

Background
New sources of hydroclimate information based on forecast models and observational data have the potential to greatly improve the management of water resources in semi-arid regions prone to drought. Better management of climate-related risks and opportunities requires both new methods to develop forecasts of drought indicators and river flow, as well as better strategies to incorporate these forecasts into drought, river or reservoir management systems. In each case the existing institutional and policy context is key, making a collaborative approach involving stakeholders essential.

Methods
This paper describes work done at the IRI over the past decade to develop statistical hydrologic forecast and water allocation models for the semi arid regions of NE Brazil (the “Nordeste”) and central northern Chile based on seasonal climate forecasts.

Results
In both locations, downscaled precipitation forecasts based on lagged SST predictors or GCM precipitation forecasts exhibit quite high skill. Spring-summer melt flow in Chile is shown to be highly predictable based on estimates of previous winter precipitation, and moderately predictable up to 6 months in advance using climate forecasts. Retrospective streamflow forecasts here are quite effective in predicting reductions in water rights during dry years. For the multi-use Oros reservoir in NE Brazil, streamflow forecasts have the most potential to optimize water allocations during multi-year low-flow periods, while the potential is higher for smaller reservoirs, relative to demand.

Conclusions
This work demonstrates the potential value of seasonal climate forecasting as an integral part of drought early warning and for water allocation decision support systems in semi-arid regions. As human demands for water rise over time this potential is certain to rise in the future.

Os modelos globais do quarto relatório do Intergovernmental Panel on Climate Change (IPCC-AR4) são avaliados para o Nordeste Setentrional do Brasil (NEB) quanto à representação da variabilidade interanual e interdecadal da precipitação para o período de 1901 a 1999 e são analisadas as projeções do cenário A1B. Essa avaliação é realizada
utilizando-se os dados do Climatic Research Unit (CRU) e a reanálise 20th Century Reanalysis V2 do National Oceanic and Atmospheric Administration (NOAA). É aplicada a transformada em ondeletas à série de dados para detectar e analisar os padrões de variabilidades existentes no século XX. Os resultados sugerem que os modelos CSIRO_MK3_0_RUN2, GISS_MODEL_E_R_RUN8 e UKMO_HADCM3_RUN1 reproduziram de maneira satisfatória a variabilidade plurianual. Os modelos divergem quanto o futuro da precipitação no NEB, alguns indicam impactos positivos na média anual de até 12% e outros impactos negativos de até 42%.

By politicizing the last bastion of “untouched nature,” climate change makes blame ubiquitous and therefore infinitely malleable. Onto this moral blank slate, critical anthropologists and political ecologists inscribe industrial/Northern blame rather than universal/pan-human blame. This article queries what our analytical stance ought to be when our field partners—those who seem to best exemplify the inequity of climate change—disagree with this reading of climate change. The Republic of the Marshall Islands contributes minimally to global climate change yet faces nationwide uninhabitability at its hands. Despite awareness of their tiny carbon footprint, grassroots Marshall Islanders (if not their government) have strongly favored a response of guilt and atonement rather than outrage and protest. I argue that various delegitimizing explanations of this perception—ignorance, denial, performance, false consciousness—are ethnographically untenable or unsatisfying. Instead, Marshallese self-blame should be understood as the local appropriation of global warming discourse in terms of a preexisting narrative of seductive modernity and cultural decline. Such an analysis allows us to appreciate how indigenous climate change self-blame, while undoubtedly problematic in many of its implications, may also carry empowering, postcolonial, counterhegemonic potentialities that should not be discounted by those searching for radical counternarratives of climate change.

Aim
We used ecological niche modelling to test different models explaining the lineage age–area relationship. We hypothesized that lineage age should influence the proportion of potential range unfilled by phyllostomid bat species. We made explicit predictions about possible relationships between the proportion of unfilled potential range and lineage age. Our goal was to analyse empirical data and fit the model that best describes our data.

Location
South America.

Methods
We modelled the ecological niche of 49 phyllostomid bat species using Maxent and Support Vector Machine (SVM). We calculated the proportion of unfilled potential range as the amount of area outside the current distribution divided by the current distribution (realized range size). Using a dated phylogeny, we regressed the proportion of unfilled potential range on lineage age. To compare our predictions we also regressed realized range size on lineage age.

Results
Unfilled potential range was weakly associated with lineage age. This relationship was an inverse function of lineage age, explaining between 0 and 17% of the proportion of unfilled potential range. Furthermore, the relationship between realized range size and lineage age exhibited a logarithmic function, with lineage age explaining between 13 and 20% of the variation in realized range size.

Main conclusions
Different regression models indicated that old phyllostomid species have smaller unfilled ranges than young species. That is, old species have filled most of the areas that are suitable for them. Furthermore, old species have larger realized ranges than young species. We thus refuted both the lineage age–area and taxon cycle models and lent support to the stasis post-expansion model. This suggests that bat species can reach most of their potential range rapidly after cladogenesis and such occupation remains more or less constant through time.

A homogeneous monthly data set of sea surface temperature (SST) and pseudo wind stress based on in situ observations is used to investigate the climatic trends over the tropical Atlantic during the last five decades (1964–2012). After a decrease of SST by about 1 °C during 1964–1975, most apparent in the northern tropical region, the entire tropical basin warmed up. That warming was the most substantial (>1 °C) in the eastern tropical ocean and in the longitudinal band of the intertropical convergence zone. Surprisingly, the trade wind system also strengthened over the peirod 1964–2012. Complementary information extracted from other observational data sources confirms the simultaneity of SST warming and the strengthening of the surface winds. Examining data sets of surface heat flux during the last few decades for the same region, we find that the SST warming was not a consequence of atmospheric heat flux forcing. Conversely, we suggest that long-term SST warming drives changes in atmosphere parameters at the sea surface, most notably an increase in latent heat flux, and that an acceleration of the hydrological cycle induces a strengthening of the trade winds and an acceleration of the Hadley circulation. These trends are also accompanied by rising sea levels and upper ocean heat content over similar multi-decadal time scales in the tropical Atlantic. Though more work is needed to fully understand these long term trends, especially what happens from the mid-1970’s, it is likely that changes in ocean circulation involving some combination of the Atlantic meridional overtuning circulation and the subtropical cells are required to explain the observations.

Knowledge of the seasonal variability of river discharge and the concentration of nutrients in the estuary waters of large rivers flowing into the tropical Atlantic contributes to a better understanding of the biogeochemical processes that occur in adjacent coastal and ocean systems. The monthly averaged variations of the physical and biogeochemical contributions of the Orinoco, Amazon, São Francisco, Paraíba do Sul (South America), Volta, Niger and Congo (Africa) Rivers are estimated from models or observations. The results indicate that these rivers deliver approximately 0.1 Pg C year−1 in its dissolved organic (DOC 0.046 Pg C year−1) and inorganic (DIC 0.053 Pg C year−1) forms combined. These values represent 27.3% of the global DOC and 13.2% of the global DIC delivered by rivers into the world’s oceans. Estimations of the air-sea CO2 fluxes indicate a slightly higher atmospheric liberation for the African systems compared with the South American estuaries (+10.6 ± 7 mmol m−2 day−1 and +5.4 ± 8 mmol m−2 day−1, respectively). During the high river discharge periods, the fluxes remained positive in all of the analyzed systems (average +12 ± 8 mmol m−2 day−1), except at the mouth of the Orinoco River, which continued to act as a sink for CO2. During the periods of low river discharges, the mean CO2 efflux decreased to +5.2 ± 9 mmol m−2 day−1. The updated and detailed review presented here contributes to the accurate quantification of CO2 input into the atmosphere and to ongoing studies on the oceanic modeling of biogeochemical cycles in the tropical Atlantic.