Soil moisture variation along a toposequence in the northeast Brazilian caatinga.
Soil moisture variations and soil water potentials are crucial to understand the plant behavior under water stress conditions. Such kind of data are also valuable for modeling efforts in hydrology, ecophysiology, soil-plantatmosphere interactions and earth system models. Here we present soil moistur...
por Portal Padrão
publicado
24/02/2019
2:12 PM
Exposure assessment of rainfall to interannual variability usingthe wavelet transform.
It is generally accepted that El NiñoSouthern Oscillation (ENSO) is the main modulator of rainfall variability over Northern South America in the interannual scale. Assuming that, an index is proposed to quantify this expected interannual variability in time series of rainfall. The result is the ex...
por Portal Padrão
publicado
24/02/2019
2:11 PM
Response of the river discharge in the Tocantins River Basin, Brazil, to environmental changes and the associated effects on the energy potential.
Climate change is expected to impact the hydrological regime worldwide, and land use and land cover change may alter the effects of the former in some cases. Secondary growth in deforested and abandoned areas is one of the main consequences of land use and cover changes in Amazonia. Among land uses,...
por Portal Padrão
publicado
24/02/2019
11:24 AM
Probabilistic flood forecasting in the Doce Basin in Brazil: effects of the basin scale and orientation and the spatial distribution of rainfall.
We critically examined the performance of probabilistic streamflow forecasting inthe prediction of flood events in 19 subbasins of the Doce River in Brazil using theEta (4 members, 5 km spatial resolution) and European Centre for Medium-RangeWeather Forecasts (ECMWF; 51 members, 32 km resolution) we...
por Portal Padrão
publicado
24/02/2019
11:23 AM
Using a hydrologic model to assess the performance of regional climate models in a semi-arid Watershed in Brazil.
This study assessed the impact of climate change on the hydrological regime of the Paraguaçu river basin, northeastern Brazil. Hydrological impact simulations were conducted using the Soil and Water Assessment Tool (SWAT) for 20202040. Precipitation and surface air temperature projections from two ...
por Portal Padrão
publicado
24/02/2019
11:15 AM
Neotectonics and tree mortality in a forest ecosystem of the Negro basin: geomorphic evidence of contemporary seismicity in the intracratonic Brazilian Amazonia.
Neotectonic activity was increasingly recorded over the Amazonian lowlands, even during historical times of a few tens of centuries. However, detailed analyses linking structures and styles of deformation are still few considering the large dimension of the region. Such events in a relatively recent...
por Portal Padrão
publicado
24/02/2019
11:14 AM
Performance of laser-based electronic devices for structural analysis of Amazonian terra-firme forests.
We are obliged to several persons that enabled our research stay at ZF2. We thank Bruno Takeshi, Ana Paula Rocha, and Luciano Castilho for providing logistic support as well as all volunteer researchers who helped during the fieldwork and setup of the experiment. We thank Alacimar Guedes by the qual...
por Portal Padrão
publicado
24/02/2019
11:12 AM
Electrochemical determination of sunscreens agents in cosmetic using square wave voltammetry.
Sunscreen agents and in particular UV filters are compounds added in different cosmetic formulations, that has the function of preventing damage caused by sun exposition. Therefore, this paper proposes the development of a simple, fast and reliable electroanalytical method utilizing square wave volt...
por Portal Padrão
publicado
24/02/2019
11:11 AM
Can intensification of cattle ranching reduce deforestation in the Amazon? insights from an agent-based social-ecological model.
Deforestation in the Amazon with its vast consequences for the ecosystem and climate is largely related to subsequent land use for cattle ranching. In addition to conservation policies, proposals to reduce deforestation include measures to intensify cattle ranching. However, the effects of land-use ...
por Portal Padrão
publicado
24/02/2019
11:09 AM
Simulation of the holocene climate over South America and impacts on the vegetation.
We provide a comprehensive analysis of the Holocene climate and vegetation changes over South America through numerical simulations. Holocene climate for several periods (8 ka, 6 ka, 4 ka, 2 ka, and present) were simulated by an atmospheric general circulation model, forced with orbital parameters, ...
por Portal Padrão
publicado
24/02/2019
11:08 AM
Changes in secondary vegetation dynamics in a context of decreasing deforestation rates in Pará Brazilian Amazon.
Tropical secondary vegetation is of particular interest as carbon sinks, potential lands for agriculture and livestock expansion, biodiversity conservation and ecosystem services. Until mid-2000s estimates of secondary vegetation in the Brazilian Amazon indicated a progressive increase of this cover...
por Portal Padrão
publicado
24/02/2019
11:06 AM
Agricultural expansion in the Brazilian Cerrado: increased soil and nutrient losses and decreased agricultural productivity.
While food and nutrition security are issues that national and international organizations are tackling, one of the central problems often overlooked is the essential role of soils in providing nutritious food. Soils are the base for food production and food security. However, the majority of soils ...
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