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Multi-scale approach to estimating aboveground biomass in the Brazilian Amazon using Landsat and LiDAR data.

Forest degradation from either natural or anthropogenic drivers involves processes that change the capacity of the ecosystem to provide services. In Brazil, estimates of carbon emissions do not currently take into account emissions from forest degradation caused by fire or by selective logging. Here...
  • por Portal Padrão
  • publicado
  • 09/10/2019
  • 1:31 PM

Effects of climate and land‐use change scenarios on fire probability during the 21st century in the Brazilian Amazon.

The joint and relative effects of future land-use and climate change on fire occurrence in the Amazon, as well its seasonal variation, are still poorly understood, despite its recognized importance. Using the maximum entropy method (MaxEnt), we combined regional land-use projections and climatic dat...
  • por Portal Padrão
  • publicado
  • 09/10/2019
  • 1:29 PM

Amazon forest response to CO2 fertilization dependent on plant phosphorus acquisition.

Global terrestrial models currently predict that the Amazon rainforest will continue to act as a carbon sink in the future, primarily owing to the rising atmospheric carbon dioxide (CO 2 ) concentration. Soil phosphorus impoverishment in parts of the Amazon basin largely controls its functioning, bu...
  • por Portal Padrão
  • publicado
  • 09/10/2019
  • 1:27 PM

Combining LiDAR and hyperspectral data for aboveground biomass modeling in the Brazilian Amazon using different regression algorithms

Accurate estimates of aboveground biomass (AGB) in tropical forests are critical for supporting strategies of ecosystem functioning conservation and climate change mitigation. However, such estimates at regional and local scales are still highly uncertain. Airborne Light Detection And Ranging (LiDAR...
  • por Portal Padrão
  • publicado
  • 27/08/2019
  • 1:46 PM

Expanding the soy moratorium to Brazil’s Cerrado

The Cerrado biome in Brazil is a tropical savanna and an important global biodiversity hot spot. Today, only a fraction of its original area remains undisturbed, and this habitat is at risk of conversion to agriculture, especially to soybeans. Here, we present the first quantitative analysis of expa...
  • por Portal Padrão
  • publicado
  • 27/08/2019
  • 1:45 PM

Hydraulic traits explain differential responses of Amazonianforests to the 2015 El Niño-induced drought

Reducing uncertainties in the response of tropical forests to global change requires understanding how intra- and interannual climatic variability selects for different species, community functional composition and ecosystem functioning, so that the response to climatic events of differing frequency...
  • por Portal Padrão
  • publicado
  • 27/08/2019
  • 1:44 PM

Results from LBA and a vision for future amazonian research

This chapter summarizes selected results from the Large-Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) and briefly describes a vision for future Amazonian research. The need for research on people and environment interactions is emphasized in the context of regional and global change. LBA d...
  • por Portal Padrão
  • publicado
  • 26/08/2019
  • 4:09 PM

Evaluation of an ensemble of regional climate model simulations over South America driven by the ERA-Interim reanalysis: model performance and uncertainties

The capability of a set of 7 coordinated regional climate model simulations performed in the framework of the CLARIS-LPB Project in reproducing the mean climate conditions over the South American continent has been evaluated. The model simulations were forced by the ERA-Interim reanalysis dataset fo...
  • por Portal Padrão
  • publicado
  • 22/08/2019
  • 4:25 PM

Phenology and seasonal ecosystem productivity in an Amazonian floodplain forest.

Several studies have explored the linkages between phenology and ecosystem productivity across the Amazon basin. However, few studies have focused on flooded forests, which correspond to c.a. 14% of the basin. In this study, we assessed the seasonality of ecosystem productivity (gross primary produc...
  • por Portal Padrão
  • publicado
  • 10/07/2019
  • 10:57 AM

On the triggering mechanisms of upward lightning.

Upward lightning studies took place in Rapid City, South Dakota, USA and S. Paulo, Brazil during the summer thunderstorm seasons from 2011 to 2016. One of the main objectives of these campaigns was to evaluate and characterize the triggering of upward positive leaders from tall objects due to preced...
  • por Portal Padrão
  • publicado
  • 04/07/2019
  • 10:59 AM

Why ‘blended finance’ could help transitions to sustainable landscapes: Lessons from the Unlocking Forest Finance project.

There is a momentum towards finding financing solutions for halting deforestation at the landscape level for the benefit of climate, biodiversity and delivery of ecosystem services. The Unlocking Forest Finance (UFF) project has, between 2013 and 2018, worked on the development of innovative financi...
  • por Portal Padrão
  • publicado
  • 25/06/2019
  • 2:14 PM

Quantifying the aerosol effect on droplet size distribution at cloud top.

This work uses the number concentration-effective diameter phase-space to test cloud sensitivity to variations in the aerosol population characteristics, such as the aerosol size distribution, number concentration and hygroscopicity. It is based on the information from the top of a cloud simulated b...
  • por Portal Padrão
  • publicado
  • 25/06/2019
  • 1:53 PM