Characterising Brazilian biomass burning emissions using WRF-Chem with MOSAIC sectional aerosol.
The South American Biomass Burning Analysis (SAMBBA) field campaign took detailed in situ flight measurements of aerosol during the 2012 dry season to characterise biomass burning aerosol and improve understanding of its impacts on weather and climate. Developments have been made to the Weather Rese...
por Portal Padrão
publicado
20/08/2015
2:10 PM
Day-to-day differences in the characterization of lightning observed by multiple high-speed cameras.
This study aims to analyze how the visible parameters of cloud-to-ground discharges such as the flash multiplicity and duration, the interstroke interval, the continuing current duration and the number of ground contacts per flash vary between observations conducted on different days. Several author...
por Portal Padrão
publicado
20/08/2015
2:07 PM
Experiences with a socio-environmental modeling course.
In a social-environmental modeling course, students need to learn complementary skills that include the conceptualisation of a model, different modeling paradigms, computer programming, and the process of rigorously converting ideas and data into a computational program using a given toolkit. Such t...
por Portal Padrão
publicado
20/08/2015
2:04 PM
Impact of climate changes on potential sugarcane yield in Pernambuco, northeastern region of Brazil.
Sugarcane is a typical culture of hot and humid climate and therefore is well adapted to the climate in many regions of Brazil. However, there may be yield reductions in the Northeastern region of Brazil due to possible future reductions in rainfall levels. The aim of this study was to simulate, usi...
por Portal Padrão
publicado
20/06/2015
2:28 PM
Improving graph-based image segmentation using non-linear color similarity metrics.
We present a new segmentation method called Weighted Felzenszwalb and Hutten-locher method (WFH), an improved version of the well-known graph-based segmentation method, Felzenszwalb and Huttenlocher method (FH). Our method uses a non-linear discrimination function based on Polynomial Mahalanobis Dis...
por Portal Padrão
publicado
20/06/2015
2:22 PM
Nitrogen management challenges in major watersheds of South America.
Urbanization and land use changes alter the nitrogen (N) cycle, with critical consequences for continental freshwater resources, coastal zones, and human health. Sewage and poor watershed management lead to impoverishment of inland water resources and degradation of coastal zones. Here we review the...
por Portal Padrão
publicado
20/06/2015
2:18 PM
Thunderstorm climatology of Brazil: ENSO and Tropical Atlantic connections.
In this report monthly thunderstorm days (TD) in 14 large cities of Brazil from 1951 to 2010 are compared with data obtained in the first part of the 20th century in the same cities and correlated with sea surface temperature (SST) of the equatorial Pacific Ocean and Tropical Atlantic Ocean. On aver...
por Portal Padrão
publicado
20/05/2015
3:37 PM
Strategies for changing the intellectual climate.
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por Portal Padrão
publicado
20/05/2015
2:42 PM
Transition to sustainability: are participatory multi-scale scenarios a useful tool?
Environmental scenarios were largely exploratory in the past decades. Normative approaches gradually became more popular and more widely applied over the last decade, due to the rising popularity of the strongly normative concept of sustainability. Here we present a normative scenario approach conce...
por Portal Padrão
publicado
20/04/2015
2:01 PM
Spectral behavior of Eucalyptus globulus (Labill.) leaves attacked by Mycosphaerella spp. in regions of visible and infrared near the electromagnetic spectrum.
The study aims to analyze the spectral behavior of leaves of Eucalyptus globulus attacked in four different severity levels by Mycosphaerella spp. in different positions in the canopy of the tree in the four seasons, considering two regions of the electromagnetic spectrum: visible and near infrared....
por Portal Padrão
publicado
20/03/2015
2:47 PM
Greenness indices from digital cameras predict the timing and seasonal dynamics of canopy-scale photosynthesis.
The proliferation of digital cameras co-located with eddy covariance instrumentation provides new opportunities to better understand the relationship between canopy phenology and the seasonality of canopy photosynthesis. In this paper we analyze the abilities and limitations of canopy color metrics ...
por Portal Padrão
publicado
20/01/2015
4:05 PM
Solar energy resource assessment in Chile: satellite estimation and ground station measurements.
The progress from the last four years in solar energy resource assessment for Chile is reported, including measurements from a ground station network spanning from two to three years of data, and satellite estimations from the recently developed Chile-SR model including two full years of data. The m...
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