The key physical parameters governing frictional dissipation in a precipitating atmosphere
Precipitation generates small-scale turbulent air flows-the energy of which ultimately dissipates to heat. The power of this process has previously been estimated to be around 2-4Wm-2 in the tropics: a value comparable in magnitude to the dynamic power of global atmospheric circulation. Here it is s...
por Portal Padrão
publicado
22/08/2013
2:11 PM
The chemistry CATT BRAMS model (CCATT BRAMS 4.5): a regional atmospheric model system for integrated air quality and weather forecasting and research
The Coupled Chemistry Aerosol-Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System (CCATTBRAMS, version 4.5) is an online regional chemical transport model designed for local and regional studies of atmospheric 5 chemistry from surface to the lower stratos...
por Portal Padrão
publicado
22/08/2013
2:09 PM
The contributions of regional knowledge networks researching environmental changes in Latin America and Africa: a synthesis of what they can do and why they can be policy relevant
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por Portal Padrão
publicado
22/08/2013
2:08 PM
Climategate: the role of the social sciences
As has been widely documented, lavishly funded media campaigns by political and financial elites and corporations with vested interests against climate policy are a central instigator of the climate backlash and a threat to democratic processes. However, it would behoove the environmental coalition,...
por Portal Padrão
publicado
22/08/2013
2:06 PM
Anatomy of dissent: a cultural analysis of climate skepticism
Based on findings from ethnographic analysis of U.S. climate scientists, this article identifies largely unrecognized sociocultural dimensions underpinning differences in scientists' perceptions of anthropogenic climate change. It argues that culturally laden tensions among scientists have influence...
por Portal Padrão
publicado
22/08/2013
2:04 PM
Integração de imagens NOAA/AVHRR: Rede de cooperação para monitoramento nacional da safra de soja
An early assessment of national crop development conditions while the plants are still in the fields is highly needed to calculate correctly projections for decision-making and policies related to government planning andfood security. The aim of this study was to evaluate the suitability of NOAA /AV...
por Portal Padrão
publicado
22/08/2013
1:58 PM
Inhalable particulate matter characterization in a medium-sized urban region in Brazil (São José dos Campos Town) – Part I: morphology
In this study, the concentration and morphological characteristics of inhalable particulate material (PM10) were evaluated and associated with climatic conditions. The mean annual concentration was 11.0 µg m−3, varying between 0,647 µg m−3 and 36.8 µg m−3. Wind speed has a higher influence ...
por Portal Padrão
publicado
22/08/2013
1:57 PM
Biodiesel de Pinhão Manso (Jatropha curcas L.) em países emergentes: alternativa para o desenvolvimento regional
O pinhão manso (Jatropha curcas L.) tem encontrado obstáculos que dificultam seu sucesso como matéria-prima alternativa ao abastecimento da indústria do biodiesel. Estas barreiras puderam ser observadas por meio de um estudo de caso envolvendo o Brasil e a Índia, países com crescimento econôm...
por Portal Padrão
publicado
22/08/2013
1:53 PM
Variability of air-sea CO2 fluxes and dissolved inorganic carbon distribution in the Atlantic Basin: a coupled model analysis
The biogeochemical dynamics of carbon in the ocean is a subject of fundamental interest to environmental studies. In this context, we have implemented a ten year run of the Brazilian Earth System Coupled Ocean-Atmosphere Model (BESM-OA2.3) integrated with TOPAZ biogeochemical model for the Atlantic ...
por Portal Padrão
publicado
22/08/2013
1:53 PM
Experiments using new initial soil moisture conditions and soil map in the Eta model over La Plata Basin
An effort towards a more accurate representation of soil moisture and its impact on the modeling of weather systems is presented. Sensitivity tests of precipitation to soil type and soil moisture changes are carried out using the atmospheric Eta model for the numerical simulation of the development ...
por Portal Padrão
publicado
22/08/2013
1:52 PM
Updated analyses of temperature and precipitation extreme indices since the beginning of the twentieth century: the HadEX2 dataset
In this study, we present the collation and analysis of the gridded land-based dataset of indices of temperature and precipitation extremes: HadEX2. Indices were calculated based on station data using a consistent approach recommended by the World Meteorological Organization (WMO) Expert Team on Cli...
por Portal Padrão
publicado
22/08/2013
1:51 PM
Calibration and validation of the Integrated Biosphere Simulator (IBIS) for Brazilian Semi-Arid Region
The reliability of predictions from climate and weather models is linked to an adequate representation of the land surface processes. To evaluate performance and to improve predictions, land surface models are calibrated against observed data. Despite an extensive literature describing methods of la...
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