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Bipolar cloud-to-ground lightning flash observations
Bipolar lightning is usually defined as a lightning flash where the current waveform exhibits a polarity reversal. There are very few reported cases of cloud-to-ground (CG) bipolar flashes using only one channel in the literature. Reports on this type of bipolar flashes are not common due to the fac...- por Portal Padrão
- publicado
- 22/08/2013
- 4:20 PM
What drives the seasonality of photosynthesis across the Amazon basin? a cross-site analysis of eddy flux tower measurements from the Brasil flux network
We investigated the seasonal patterns of Amazonian forest photosynthetic activity, and the effects thereon of variations in climate and land-use, by integrating data from a network of ground-based eddy flux towers in Brazil established as part of the 'Large-Scale Biosphere Atmosphere Experiment in A...- por Portal Padrão
- publicado
- 22/08/2013
- 3:22 PM
Lightning enhancement in the Amazon region due to urban activity
Urbanization has an increasing contribution to anthropogenic cl imate forcing. The impact arises mainly from the Urban Heat Island (UHI) effect and aerosol anthropogenic emissions. An important but not completely understood consequence of this forcing is its effect on local lightning activity. Chang...- por Portal Padrão
- publicado
- 22/08/2013
- 2:34 PM
Thunderstorm incidence in Southeastern Brazil estimated from different data sources
This paper describes a comparative analysis of the thunderstorm incidence in Southeastern Brazil obtained from thunderstorm days observed at two different epochs (from 1910 to 1951 and from 1971 to 1984) and from lightning data provided by the Brazilian lightning location system RINDAT (from 1999 to...- por Portal Padrão
- publicado
- 22/08/2013
- 2:33 PM
Eutrophication reverses whole-lake carbon budgets
Lakes play a large role in global atmospheric and landscape carbon (C) processes, but their role may change as they become polluted with nutrients. Geographic regions rich in surface waters are also prone to agricultural and urban development and so may become increasingly eutrophic as the populatio...- por Portal Padrão
- publicado
- 22/08/2013
- 2:31 PM
Balanço de radiação no Pantanal Sul Mato-grossense durante a estação seca
Este trabalho apresenta a análise das componentes do balanço de radiação à superfície sobre o Pantanal Sul Mato-grossense, a partir de medidas experimentais coletadas durante a estação seca, em setembro de 1999. Neste período, as componentes do balanço de radiação mostraram um ciclo diur...- por Portal Padrão
- publicado
- 22/08/2013
- 2:25 PM
Observed and projected changes in rainfall extremes in the metropolitan area of São Paulo
Changes in rainfall extremes and flooding are becoming more frequent in many countries, particularly in large cities where people and assets are concentrated. In the Metropolitan Area of the city of São Paulo (MASP) region, heavy or extreme precipitation events have important effects on society. Fl...- por Portal Padrão
- publicado
- 22/08/2013
- 2:23 PM
Recent extremes of drought and flooding in Amazonia: vulnerabilities and human adaptation
The present study focuses on the impacts of extreme drought and flooding situations in Amazonia, using level/discharge data from some rivers in the Amazon region as indicators of impacts. The last 10 years have featured various once in a century droughts and floods in the Amazon basin, which have af...- por Portal Padrão
- publicado
- 22/08/2013
- 2:16 PM
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