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Multiscale analysis and simulations of an extreme rainfall event in Northeast Brazil with the MPAS model

Extreme rainfall events are becoming increasingly frequent in Northeast Brazil (NEB). The state of Alagoas, located on the eastern coast of the region, is one of the most affected areas in recent years, with records of high-magnitude events over the past four years. These events cause significant so...
  • por Portal Padrão
  • publicado
  • 23/05/2025
  • 4:19 PM

Use of Radar and Lightning Data Assimilation in Short-term Forecast over Brazil.

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  • por Portal Padrão
  • publicado
  • 23/05/2025
  • 4:16 PM

Advances in Data Assimilation at CPTEC/INPE

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  • por Portal Padrão
  • publicado
  • 20/05/2025
  • 5:07 PM

Easterly wave disturbances on tropical south Atlantic and their impact over northeast Brazil.

This study presents a 21-year climatology (19982018) of Easterly Wave Disturbances (EWDs) over the Tropical South Atlantic (TSA). The identification of these systems was performed subjectively using infrared satellite images and fields of relative vorticity and streamlines at 1000, 850, 700, 500, an...
  • por Portal Padrão
  • publicado
  • 20/05/2025
  • 4:26 PM

Are flash droughts intensifying in Brazil?.

Flash droughts are a type of drought that develops abruptly in response to rainfall deficits and high evapotranspiration that depletes soil water quickly. The speed and intensity can strongly impact both natural vegetation and crops, and the lack of predictability poses a major challenge to early wa...
  • por Portal Padrão
  • publicado
  • 20/05/2025
  • 3:49 PM

Spatio-temporal assessment of extreme precipitation events in southeastern Brazil.

This study investigates the spatial and temporal variability of extreme precipitation in southeast Brazil (S & atilde;o Paulo, Minas Gerais, Rio de Janeiro, and Esp & iacute;rito Santo) between 1981 and 2020, using the generalized extreme value (GEV) distribution. The region, which plays a vital rol...
  • por Portal Padrão
  • publicado
  • 20/05/2025
  • 3:47 PM

Shuffling the deck: A gamified multicriteria approach to prioritize agroecological restoration areas in Northeastern Pará, Brazilian Amazon.

Decision support tools such as Multicriteria Decision Analysis (MCDA) can be employed in the context of the Theory of Change (ToC) to support stakeholders' concerns and guide agroecological transitions in the tropics. Given the so often limitation of financial resources, identifying priority areas f...
  • por Portal Padrão
  • publicado
  • 20/05/2025
  • 3:44 PM

The caatinga dry tropical forest: A highly efficient carbon sink in South America.

Seasonally Dry Tropical Forests (SDTFs) may act as considerable carbon sinks, regulating the atmospheric and terrestrial carbon storage and fluxes with implications for local, regional and global climates. In the Caatinga, an endemic Brazilian SDTF, the research on the magnitude of the CO2 sink is s...
  • por Portal Padrão
  • publicado
  • 20/05/2025
  • 3:42 PM

Unprecedented flooding in Porto Alegre Metropolitan Region (Southern Brazil) in May 2024: Causes, risks, and impacts.

On May 2, 2024, Porto Alegre in Rio Grande do Sul, Brazil, experienced a historic flood surpassing the catastrophic 1941 event. The flood's peak water level of 535 cm was 59 cm higher than in 1941, driven by extreme precipitation anomalies and land use changes in the Regional Metropolitan Area of Po...
  • por Portal Padrão
  • publicado
  • 20/05/2025
  • 3:39 PM

Synoptic patterns of extreme precipitation events in Northeast Brazil.

Northeast Brazil (NEB) is one of the driest regions in the country, with some areas, such as the sertão, receiving less than 400 mm/year. Despite this aridity, NEB is influenced by various synoptic-scale systems that contribute to intense rainfall events throughout the year. This study aimed to ide...
  • por Portal Padrão
  • publicado
  • 20/05/2025
  • 3:34 PM

A physical parameterization for cloudy-sky downward longwave radiation: Validation for tropical and subtropical regions in Brazil.

Downward longwave radiation is a crucial component of the surface radiation balance and is essential for a better understanding of the greenhouse effect. It is strongly influenced by atmospheric temperature, water vapor content, and cloudiness. This study proposes a new model to estimate downward l...
  • por Portal Padrão
  • publicado
  • 20/05/2025
  • 3:33 PM

Degradation and deforestation increase the sensitivity of the amazon forest to climate extremes.

About 40% of the Brazilian Amazon has been deforested or suffered changes in forest structure through degradation (selective logging, fires, and fragmentation). The impact of forest degradation on the forests sensitivity to climate extremes has not been fully explored because of a lack of data and t...
  • por Portal Padrão
  • publicado
  • 20/05/2025
  • 3:31 PM