Estudo de íons maiores no extrato aquoso de particulado atmosférico em São José dos Campos.
A geração de energia através da queima de combustíveis, acelerada pela forte urbanização do último século promoveu a alteração significativa da composição química da atmosfera global e, em particular dos centros urbanos. Para compreender os processos de emissão, transformação e conta...
por Portal Padrão
publicado
21/08/2015
1:19 PM
Identifying areas susceptible to desertification in the Brazilian northeast.
Approximately 57 % of the Brazilian northeast region is recognized as semi-arid land and has been undergoing intense land use processes in the last decades, which have resulted in severe degradation of its natural assets. Therefore, the objective of this study is to identify the areas that are susce...
por Portal Padrão
publicado
20/08/2015
4:15 PM
Natural and anthropogenic influence on soil erosion in a rural watershed in the Brazilian southeastern region.
Human activities have been driven land cover, provoking acceleration of the erosive process and alteration on the soil characteristics. To explore the effects of human disturbance, we investigated the influences of natural and anthropogenic features on soil quality and soil erosion indicators (EI) w...
por Portal Padrão
publicado
20/08/2015
4:01 PM
Impacts of future climatic and land cover changes on the hydrological regime of the Madeira River basin.
Brazilian strategic interest in the Madeira River basin, one of the most important of the southern Amazon tributaries, includes the development of hydropower to satisfy the countrys growing energy needs and new waterways to boost regional trade and economic development. Because of evidences that cli...
por Portal Padrão
publicado
20/08/2015
3:59 PM
Vulnerability of soil and its associated organic matter to degradation in a subtropical region: a study from São Paulo state, Brazil.
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por Portal Padrão
publicado
20/08/2015
3:57 PM
Building a hybrid land cover map with crowdsourcing and geographically weighted regression.
Land cover is of fundamental importance to many environmental applications and serves as critical baseline information for many large scale models e.g. in developing future scenarios of land use and climate change. Although there is an ongoing movement towards the development of higher resolution gl...
por Portal Padrão
publicado
20/08/2015
3:55 PM
High-speed video and electric field observation of a negative upward leader connecting a downward positive leader in a positive cloud-to-ground flash.
It has been discussed in past papers if a positive leader propagates in a stepped fashion or not. Some studies state that, in some positive cloud-to-ground flashes, the electric field pulses observed just before the connection of the positive leader to ground could be a manifestation of the stepping...
por Portal Padrão
publicado
20/08/2015
3:50 PM
Analysis of Extreme Precipitation Events Using a Novel Data Mining Approach.
An innovative data mining approach is presented and applied to investigate the climatic causes of extreme climatic events. Our approach comprises two main steps of knowledge extraction, applied successively in order to reduce the complexity of the original data set. The goal is to identify a much sm...
por Portal Padrão
publicado
20/08/2015
3:49 PM
On the ability of large-scale hydrological models to simulate land use and land cover change impacts in Amazonian basins.
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por Portal Padrão
publicado
20/08/2015
3:43 PM
Evolution and challenges of dynamic global vegetation models for some aspects of plant physiology and elevated atmospheric CO2.
Dynamic global vegetation models (DGVMs) simulate surface processes such as the transfer of energy, water, CO2, and momentum between the terrestrial surface and the atmosphere, biogeochemical cycles, carbon assimilation by vegetation, phenology, and land use change in scenarios of varying atmospheri...
por Portal Padrão
publicado
20/08/2015
3:40 PM
Complex socio-ecological dynamics driven by extreme events in the Amazon.
Several years with extreme floods or droughts in the past decade have caused human suffering in remote communities of the Brazilian Amazon. Despite documented local knowledge and practices for coping with the high seasonal variability characteristic of the regions hydrology (e.g., 10 m change in riv...
por Portal Padrão
publicado
20/08/2015
3:34 PM
Hand terrain descriptor for mapping regional scale eco-hydrological units of amazon terra firme.
The HAND (Height Above the Nearest Drainage), a quantitative topographic descriptor, is used to classify terrain in a manner that is related to local soil water conditions, providing hydrological meaning to the SRTM DEM. In this paper, we compare performance of using the HAND grid instead of the SRT...
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