Reliability evaluation of wind regime estimates provided by the brams model for alagoas state (Brazilian northeastern region): influence of nesting and horizontal resolution grids.
Observational data obtained at two wind towers located at the Alagoas State (Northeast of Brazil - NEB) were used to evaluate the influence of horizontal grid setup on the reliability of wind estimates provided by the numerical weather prediction model BRAMS. Statistical analysis were performed to e...
por Portal Padrão
publicado
20/08/2014
4:09 PM
Thunderstorm climatology of Brazil: ENSO and Tropical Atlantic connections.
In this report monthly thunderstorm days (TD) in 14 large cities of Brazil from 1951 to 2010 are compared with data obtained in the first part of the 20th century in the same cities and correlated with sea surface temperature (SST) of the equatorial Pacific Ocean and Tropical Atlantic Ocean. On aver...
por Portal Padrão
publicado
20/08/2014
4:07 PM
The surface radiation budget over South America in a set of regional climate models from the CLARIS-LPB project.
The performance of seven regional climate models in simulating the radiation and heat fluxes at the surface over South America (SA) is evaluated. Sources of uncertainty and errors are identified. All simulations have been performed in the context of the CLARIS-LPB Project for the period 1990-2008 an...
por Portal Padrão
publicado
20/08/2014
4:02 PM
River inflow and retention time affecting spatial heterogeneity of chlorophyll and water-air CO2 fluxes in a tropical hydropower reservoir.
Much research has been devoted to understanding the complexity of biogeochemical and physical processes responsible for the greenhouse gas (GHG) emissions from hydropower reservoirs. Spatial complexity and heterogeneity of GHG emission may be observed in these systems because it is dependent on floo...
por Portal Padrão
publicado
20/08/2014
4:00 PM
Uncertainties in greenhouse gases inventories – expanding our perspective.
Strategies for mitigating global climate change require accurate estimates of the emissions of greenhouse gases (GHGs). A strong consensus in the global scientific community states that efforts to control climate change require stabilization of the atmospheric concentration of GHGs (as per a recent ...
por Portal Padrão
publicado
20/08/2014
3:57 PM
Rainfall and climate variability: long-term trends in the metropolitan area of São Paulo in the 20th century.
We investigated spatial-temporal variability and long-term trends of rainfall over the Metropolitan Area of São Paulo (MASP). Due to a lack of continuous and consistent rainfall observations in the MASP, a database for the spatial analysis was created from a composite of 94 stations, with daily rai...
por Portal Padrão
publicado
20/08/2014
3:52 PM
Downscaling statistical model techniques for climate change analysis applied to the Amazon Region
The Amazon is an area covered predominantly by dense tropical rainforest with relatively small inclusions of several other types of vegetation. In the last decades, scientific research has suggested a strong link between the health of the Amazon and the integrity of the global climate: tropical fore...
por Portal Padrão
publicado
20/08/2014
3:49 PM
A linked vulnerability and resilience framework for adaptation pathways in remote disadvantaged communities.
We develop a systems framework for exploring adaptation pathways to climate change among people in remote and marginalized regions. The framework builds on two common and seemingly paradoxical narratives about people in remote regions. The first is recognition that people in remote regions demonstra...
por Portal Padrão
publicado
20/08/2014
3:46 PM
Why does air passage over forest yield more rain? examining the coupling between rainfall, pressure, and atmospheric moisture content.
The influence of forest loss on rainfall remains poorly understood. Addressing this challenge, Spracklen et al. recently presented a pantropical study of rainfall and land cover that showed that satellite-derived rainfall measures were positively correlated withthe degree to whichmodel-derived air t...
por Portal Padrão
publicado
20/08/2014
3:43 PM
Cluster analysis applied to the spatial and temporal variability of monthly rainfall in Alagoas state, Northeast of Brazil.
Rainfall over the northeast part of Brazil is highly influenced by several weather systems such as trade winds, the Intertropical Convergence Zone, Easterly Wave Disturbances, Bolivia High and Atlantic Sub-tropical Anticyclone. The objectives of this work were to identify, using cluster analysis, sp...
por Portal Padrão
publicado
20/08/2014
3:39 PM
Influence of Antarctic ice sheet lowering on the Southern Hemisphere climate: modeling experiments mimicking the mid-Miocene.
A coupled global atmosphere-ocean model is used to study the influence of the Antarctica ice sheet in a configuration that mimics that of the early Miocene on the atmospheric and oceanic circulations. Based on different climate simulations of the present day (CTR) and conducted with distinct Antarct...
por Portal Padrão
publicado
20/08/2014
3:32 PM
Sustaining ecosystem services: overcoming the dilemma posed by local actions and planetary boundaries.
Resolving challenges related to the sustainability of natural capital and ecosystem services is an urgent issue. No roadmap on reaching sustainability exists; and the kind of sustainable land use required in a world that acknowledges both multiple environmental boundaries and local human well-being ...
Redes Sociais