Worldwide stable carbon and nitrogen isotopes of Big Mac (R) patties: an example of a truly “glocal” food.
The Big Mac (R), McDonald's (R) signature burger, is a global food served in over 100 countries. We measured carbon (delta(13)C) and nitrogen (delta(15)N) stable isotope ratios of Big Macs (R) from twenty-six countries. The delta(13)C values varied from -25.4%. to -11.1%, representing cattle-rearing...
por Portal Padrão
publicado
22/08/2011
1:50 PM
The drought of 2010 in the context of historical droughts in the Amazon region.
The year 2010 featured a widespread drought in the Amazon rain forest, which was more severe than the "once-in-a-century" drought of 2005. Water levels of major Amazon tributaries fell drastically to unprecedented low values, and isolated the floodplain population whose transportation depends upon o...
por Portal Padrão
publicado
22/08/2011
1:48 PM
A Geographical approach to self-organizing maps algorithm applied to image segmentation.
Image segmentation is one of the most challenging steps in image processing. Its results are used by many other tasks regarding information extraction from images. In remote sensing, segmentation generates regions according to found targets in a satellite image, like roofs, streets, trees, vegetatio...
por Portal Padrão
publicado
22/08/2011
1:47 PM
Concurrent climate impacts of tropical South America land-cover change.
The climatic effects of concurrent land-cover changes in Amazonia and Northeast Brazil (NEB) were evaluated by simulations using the Center for Weather Forecasting and Climate Studies Atmospheric General Circulation Model (CPTEC-AGCM). Three experiments were performed: Amazon savannization, NEB dese...
por Portal Padrão
publicado
22/08/2011
1:45 PM
Satellite-based estimates of groundwater storage variations in large drainage basins with extensive floodplains.
This study presents monthly estimates of groundwater anomalies in a large river basin dominated by extensive floodplains, the Negro River Basin, based on the synergistic analysis using multisatellite observations and hydrological models. For the period 2003-2004, changes in water stored in the aquif...
por Portal Padrão
publicado
22/08/2011
1:43 PM
Impact of global warming on the geobotanic zones: an experiment with a statistical-dynamical climate model.
In this study, a zonally-averaged statistical climate model (SDM) is used to investigate the impact of global warming on the distribution of the geobotanic zones over the globe. The model includes a parameterization of the biogeophysical feedback mechanism that links the state of surface to the atmo...
por Portal Padrão
publicado
22/08/2011
1:42 PM
Forecast of solar energy resource by using neural network methods.
This work aims at discussing the artificial neural networks (ANN) and some applications in renewable energy assessment. First, the paper describes the statistical relevance of this tool in different areas of knowledge and the main ANN concepts and configurations. Finally, the paper presents and disc...
por Portal Padrão
publicado
22/08/2011
1:40 PM
Modelling and numerical simulation of the velocity field in the Parque Estadual do Cantão (TO), Brazil.
The Parque Estadual do Cantão is located at Tocantins (TO), north of Brazil, in a delta formed by the rivers Javaés, Coco and Araguaia. It is a wetland where the seasonal changes drive the biogeochemistry cycles. The knowledge of the water flux dynamics is very important for the understanding of t...
por Portal Padrão
publicado
22/08/2011
1:38 PM
Evaluation of mesoscale convective systems in South America using multiple satellite products and an object-based approach.
In this study, an object-based verification method was used to reveal the existence of systematic errors in three satellite precipitation products: Tropical Rainfall Measurement Mission (TRMM), Climate Prediction Center Morphing Technique (CMORPH), and Precipitation Estimation from Remotely Sensed I...
por Portal Padrão
publicado
22/08/2011
1:36 PM
Os números (surpreendentes) de mortes por raios no Brasil.
Em termos de estações do ano, a maior parte das mortes ocorreu no verão. Na verdade, 77% das mortes se deram no verão e na primavera, períodos do ano em que se registrou cerca de 80% dos raios no Brasil. O 5 de março de 2003 foi a data em que se registrou o maior número de fatalidades nos úl...
por Portal Padrão
publicado
22/08/2011
1:35 PM
Ornithophagy in rhinella icterica (SPIX, 1824).
Reportamos um evento de ornitofagia por Rhinella icterica sobre Certiaxis cinnamomeus ocorrido em 2010, na região central do Estado do Rio Grande do Sul (29°41S, 53°48W), Brasil. ABSTRACT: In this work we report an observation of an ornitophagy event on Certhiaxis cinnamomeus by Rhinella icterica...
por Portal Padrão
publicado
22/08/2011
1:33 PM
Fuzzy logic and geostatistical techniques for spatialization of soil texture in region with rough terrains.
From the geotechnical standpoint, it is interesting to analyse the soil texture in regions with rough terrain due to its relation with the infiltration and runoff processes and, consequently, the effect on erosion processes. The purpose of this paper is to present a methodology that provides the soi...
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