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Carbon dynamic and emissions in Brazilian hydropower reservoirs.
As well documented by the scientific literature and strongly stated by the Intergovernmental Panel on Climate Change (IPCC), changes in the atmosphere composition, due to increasing emissions of greenhouse gases (GHG), may result in drastic environmental consequences, both in a regional and in a glo...- por Portal Padrão
- publicado
- 23/08/2011
- 4:13 PM
Climate change in the Amazon basin: tipping points, changes in extremes and impacts on natural and human systems.
The Amazon River system is the single, largest source of freshwater on Earth and its flow regime is subject to interannual and long-term climate variability, which translate into large variations in downstream discharge (Richey et al., 1989; Marengo and Nobre, 2001; Marengo 2004, 2005, 2006, 2007; M...- por Portal Padrão
- publicado
- 23/08/2011
- 4:08 PM
Entities and relations for agent-based modelling of complex spatial systems.
This work presents a contribution towards generalising the representation of geospatial entities and their relations for simulating complex spatial systems using the agentbased approach. We analyse the literature, and argue that each of the four types of relation is necessary. These relations can be...- por Portal Padrão
- publicado
- 23/08/2011
- 4:05 PM
Consequences of climate change for ecosystems and ecosystem services in the Tropical Andes.
The tropical Andes1 harbor extraordinary biological and cultural diversity, contained in a mosaic of ecosystems (Josse et al. 2009). The regions complex topography, coupled with elevational and latitudinal gradients, results in varied physical conditions that create unique habitats and barriers for ...- por Portal Padrão
- publicado
- 23/08/2011
- 4:02 PM
Free and open source GIS: will there ever be a Geo-Linux?
This paper examines the constraints that limit the large-scale adoption of open source GIS. Although the open source GIS community has already achieved relevant results, their products have a small market share. There is equivalent to Linux and Apache in the open source GIS scene. We try to explain ...- por Portal Padrão
- publicado
- 27/08/2010
- 3:22 PM
Ecosystem carbon fluxes and amazonian forest metabolism
Long-term measurements of ecosystem-atmosphere exchanges of carbon, water, and energy, via eddy flux towers, give insight into three key questions about Amazonian forest function. First, what is the carbon balance of Amazon forests? Some towers give accurate site-specific carbon balances, as validat...- por Portal Padrão
- publicado
- 26/08/2009
- 4:52 PM
Efeito estufa
O efeito estufa e um fenômeno natural que faz com que a temperatura da Terra seja maior do que seria na ausência de atmosfera, permitindo assim que ocorra a vida da forma como a conhecemos. Se não houvesse 0 efeito estufa, a temperatura media da Terra seria -18°C, ao invés dos 15°C que temos h...- por Portal Padrão
- publicado
- 26/08/2009
- 4:51 PM
Redes Sociais