Case studies of easterly wave disturbances over northeast Brazil using the Eta model
This research aims to analyze two easterly wave disturbance events that reached the east coast of Northeast Brazil (NEB) on 15 May 2005 and 20 June 2006. The performance of the regional Eta Model was evaluated through four sets of experiments using different horizontal resolutions (10 and 40 km) and...
por Portal Padrão
publicado
22/08/2011
2:18 PM
The droughts of 1996-1997 and 2004-2005 in Amazonia: hydrological response in the river main-stem
Severe hydrological droughts in the Amazon have generally been associated with strong El Niño events. More than 100 years of stage record at Manaus harbour confirms that minimum water levels generally coincide with intense warming in the tropical Pacific sea waters. During 2005, however, the Amazon...
por Portal Padrão
publicado
22/08/2011
2:17 PM
Using fuzzy cognitive maps to describe current system dynamics and develop land cover scenarios: a case study in the Brazilian Amazon
In this study we developed a methodology to identify and quantify the relationships among determinants of land cover change using a regional case study in the Brazilian Amazon. The method is based on the application of fuzzy cognitive maps (FCMs), a semi-quantitative tool that provides a structured ...
por Portal Padrão
publicado
22/08/2011
2:15 PM
Verificação das previsões de tempo para precipitação usando ensemble regional para o estado do Ceará em 2009
Este artigo apresenta um estudo de verificação das previsões de chuva de um sistema de previsão do tempo por ensemble regional. O conjunto é composto por seis membros, dos quais quatro utilizam o modelo RAMS 6.0 e dois usam o WRF 3.1, inicializados com dados dos modelos globais do CPTEC ou GFS ...
por Portal Padrão
publicado
22/08/2011
2:13 PM
Evaluation of soil moisture from satellite observations over South America
A study was performed to evaluate the surface soil moisture derived from Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E) sensor observations over South America. Other soil moisture and rainfall datasets were also used for the analysis. The information for the soil data...
por Portal Padrão
publicado
22/08/2011
2:12 PM
Caracterização morfológica de partículas na atmosfera de São José dos Campos SP, utilizando microscopia eletrônica de varredura (MEV)
O estudo trata da caracterização morfológica do aerossol Black Carbon (BC) coletado durante os meses de março a novembro de 2008 num ponto de monitoramento em São José dos Campos-SP. O aerossol BC é um particulado inerte na atmosfera, porém, devido à sua porosidade e natureza adsortiva, atu...
por Portal Padrão
publicado
22/08/2011
2:10 PM
Fisheries and trade of seahorses in Brazil: historical perspective, current trends, and future directions.
Seahorses (Hippocampus spp.) are globally threatened by overexploitation and habitat destruction; they are also regarded as susceptible to heavy exploitation due to some of their life-history traits. From an economic perspective, they are fishes with high monetary value and marketability. Seahorses ...
por Portal Padrão
publicado
22/08/2011
2:09 PM
Os raios e o Programa Espacial Brasileiro
Os raios podem interferir e até comprometer temporariamente o sucesso de qualquer programa espacial. Acidentes com raios no setor aeroespacial, atualmente, são raros, em função das precauções tomadas nos centros de lançamento....
por Portal Padrão
publicado
22/08/2011
2:07 PM
O setor elétrico e as mudanças climáticas
Com as alterações do clima, tempestades e ventanias serão cada vez mais frequentes, o que tornará mais vulneráveis as linhas de transmissão aéreas de energia distribuídas pelo Brasil....
por Portal Padrão
publicado
22/08/2011
2:05 PM
Tropical South America east of the Andes.
The year 2010 began with an El Niño event well stablished in the Pacific Ocean. A rapid transition took place and La Niña was present by July. The La Niña event in 2010 one of the strongest on record. The El Niño-to-La Niña transition was similar to the event occurring in 1998, another very war...
por Portal Padrão
publicado
22/08/2011
2:02 PM
The drought of Amazonia in 2010.
After the drought of 2005, drought struck the Amazon region again in 2010. Drier-than-normal conditions were observed in northwestern, central, and eastern Amazonia during austral summer and the rest of Amazonia until the end of the year. Below-normal rainfall and warm temperatures affected the wate...
por Portal Padrão
publicado
22/08/2011
2:00 PM
Amazon deforestation in Brazil: effects, drivers and challenges.
The concept of global ecosystem services has become a powerful paradigm for understanding the link between ecosystem processes and related human activities, which is expressed by the economic and ecological quantification of the services in regards to sustainable development. The role of tropical fo...
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