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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
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...- por Portal Padrão
- publicado
- 20/08/2015
- 3:33 PM
The effects of river inflow and retention time on the spatial heterogeneity of chlorophyll and water–air CO2 fluxes in a tropical hydropower reservoir.
Abundant research has been devoted to understanding the complexity of the biogeochemical and physical processes that are responsible for greenhouse gas (GHG) emissions from hydropower reservoirs. These systems may have spatially complex and heterogeneous GHG emissions due to flooded biomass, river i...- por Portal Padrão
- publicado
- 20/08/2015
- 3:28 PM
Extreme flood events in the Bolivian Amazon Wetlands.
Study region: The Amazonian wetlands of Bolivia, known as the Llanos de Moxos, are believed to play a crucial role in regulating the upper Madeira hydrological cycle, the most important southern tributary of the Amazon River. Because the area is vast and sparsely populated, the hydrological function...- por Portal Padrão
- publicado
- 20/08/2015
- 3:26 PM
Redes Sociais