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Rosmeri Porfírio Da Rocha  - - - 
Top co-authors See all
Filippo Giorgi

85 shared publications

International Centre for Theoretical Physics (ICTP), Trieste, Italy

Diego Oliveira De Souza

77 shared publications

LabSelen-NanoBio - Universidade de Federal de Santa Maria, Santa Maria, Brazil

Erika Coppola

36 shared publications

International Centre for Theoretical Physics (International Center for Theoretical Physics (ICTP)), Trieste, Italy

Tércio Ambrizzi

34 shared publications

Department of Atmospheric Sciences Institute of Astronomy, Geophysics and Atmospheric Sciences, University of São Paulo, São Paulo, Brazil

Rita Y. Ynoue

21 shared publications

Universidade de São Paulo, Brasil

39
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Publication Record
Distribution of Articles published per year 
(2004 - 2018)
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21
 
Publications See all
Article 0 Reads 0 Citations Key Features and Adverse Weather of the Named Subtropical Cyclones over the Southwestern South Atlantic Ocean Michelle Simões Reboita, Rosmeri Porfírio Da Rocha, Débora M... Published: 27 December 2018
Atmosphere, doi: 10.3390/atmos10010006
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This work documents the main features of six subtropical cyclones occurred between the years 2010 and 2016 over the southwestern South Atlantic Ocean, near the Brazilian coast, which received names (with the exception of one) from the Brazilian Navy Hydrographic Center. The fine-resolution ERA5 reanalysis and rainfall estimates from the Tropical Rainfall Measuring Mission (TRMM) were used to describe the synoptic environment and the adverse weather conditions during the six events. The support of a small-amplitude trough at mid-levels or a cut-off low, weak vertical wind shear, and moisture flux convergence are the main features contributing to the subtropical cyclogenesis at the surface. On the other hand, sea surface temperature (SST) presents a secondary contribution since the cyclones develop over the ocean with a wide range of SST values (from 22.5 °C to 28.6 °C in the initial phase of cyclones). The six subtropical cyclones are less deep in the atmosphere column than the tropical ones and, unlike the extratropical cyclones, they have little or no westward tilt with an increase in height. The studied subtropical cyclones produced adverse weather conditions such as (a) strong winds (reaching 17 m·s−1 at 10 m high) for a long period occurring east/southeastward of the cyclone center, and (b) high amounts of rainfall along the southeastern coast of Brazil, where the accumulated rainfall varied between 170 to 350 mm, being in most cases higher than the monthly climatology. Over the continent, the Brazilian states of Rio de Janeiro and Espírito Santo were the most affected by the intense rainfall associated with the cyclones.
Article 2 Reads 0 Citations Severe Weather Events over Southeastern Brazil during the 2016 Dry Season Amanda Rehbein, Lívia Márcia Mosso Dutra, Tercio Ambrizzi, R... Published: 10 June 2018
Advances in Meteorology, doi: 10.1155/2018/4878503
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Southeastern Brazil is the most populated and economically developed region of this country. Its climate consists of two distinct seasons: the dry season, extending from April to September, the precipitation is significantly reduced in comparison to that of the wet season, which extends from October to March. However, during nine days of the 2016 dry season, successive convective systems were associated with atypical precipitation events, tornadoes and at least one microburst over the southern part of this region. These events led to flooding, damages to buildings, shortages of electricity and water in several places, many injuries, and two documented deaths. The present study investigates the synoptic and dynamical features related to these anomalous events. The convective systems were embedded in an unstable environment with intense low-level jet flow and strong wind shear and were supported by a sequence of extratropical cyclones occurring over the Southwest Atlantic Ocean. These features were intensified by the Madden–Julian oscillation (MJO) in its phase 8 and by intense negative values of the Pacific South America (PSA) 2 mode.
Article 0 Reads 1 Citation Previsão Climática Sazonal para o Brasil Obtida Através de Modelos Climáticos Globais e Regional Michelle Simões Reboita, Cássia Gabriele Dias, Lívia Márcia ... Published: 01 June 2018
Revista Brasileira de Meteorologia, doi: 10.1590/0102-7786332001
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Resumo Este estudo avalia a destreza de dois modelos climáticos globais (CPTEC e CFSv2) e de um modelo climático regional (RegCM4) em prever o clima sazonal em diferentes regiões do Brasil. O RegCM4 foi dirigido tanto com as saídas do sistema CFSv2 quanto do modelo do CPTEC. Também foram utilizadas duas versões do RegCM: a 4.3 e a 4.5. O RegCM4.3 foi dirigido por seis membros do CFSv2, enquanto o RegCM4.5 foi dirigido por um membro do modelo global do CPTEC. Todas as previsões iniciaram cerca de dois meses antes do trimestre a ser previsto e ao todo foram realizadas 94 simulações com o modelo regional. De forma geral, o RegCM4 adiciona valor às previsões dos modelos climáticos globais, principalmente, quando é aninhado às saídas do modelo do CPTEC. Quando o RegCM4.5 é dirigido por esse modelo global e é utilizada a parametrização de convecção cumulus de Emanuel há uma boa performance do modelo regional na previsão da precipitação e temperatura do ar em quase todo o Brasil.
Article 2 Reads 5 Citations Land Use Change over the Amazon Forest and Its Impact on the Local Climate Marta Llopart, Michelle Simões Reboita, Erika Coppola, Filip... Published: 03 February 2018
Water, doi: 10.3390/w10020149
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Simple Summary Abstract One of the most important anthropogenic influences on climate is land use change (LUC). In particular, the Amazon (AMZ) basin is a highly vulnerable area to climate change due to substantial modifications of the hydroclimatology of the region expected as a result of LUC. However, both the magnitude of these changes and the physical process underlying this scenario are still uncertain. This work aims to analyze the simulated Amazon deforestation and its impacts on local mean climate. We used the Common Land Model (CLM) version 4.5 coupled with the Regional Climate Model (RegCM4) over the Coordinated Regional Climate Downscaling Experiment (CORDEX) South America domain. We performed one simulation with the RegCM4 default land cover map (CTRL) and one simulation under a scenario of deforestation (LUC), i.e., replacing broadleaf evergreen trees with C3 grass over the Amazon basin. Both simulations were driven by ERA Interim reanalysis from 1979 to 2009. The climate change signal due to AMZ deforestation was evaluated by comparing the climatology of CTRL with LUC. Concerning the temperature, the deforested areas are about 2 °C warmer compared to the CTRL experiment, which contributes to decrease the surface pressure. Higher air temperature is associated with a decrease of the latent heat flux and an increase of the sensible heat flux over the deforested areas. AMZ deforestation induces a dipole pattern response in the precipitation over the region: a reduction over the west (about 7.9%) and an increase over the east (about 8.3%). Analyzing the water balance in the atmospheric column over the AMZ basin, the results show that under the deforestation scenario the land surface processes play an important role and drive the precipitation in the western AMZ; on the other hand, on the east side, the large scale circulation drives the precipitation change signal. Dipole patterns over scenarios of deforestation in the Amazon was also found by other authors, but the precipitation decrease on the west side was never fully explained. Using budget equations, this work highlights the physical processes that control the climate in the Amazon basin under a deforestation scenario.
Article 0 Reads 0 Citations A influência da topografia da região sul de Minas Gerais nas variáveis atmosféricas simuladas com o RegCM4 Debora Martins Oliveira, Michelle Simões Reboita, Rosmeri Po... Published: 01 January 2018
Revista Brasileira de Geografia Física, doi: 10.26848/rbgf.v10.6.p758-772
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A região sul do estado de Minas Gerais (RSMG) possui topografia acidentada tendo como destaque a Serra da Mantiqueira. Devido a essa característica peculiar, em geral, os modelos climáticos com resoluções horizontais grosseiras não conseguem representar adequadamente o clima da região. A fim de identificar o impacto da topografia da RSMG na temperatura do ar, precipitação e circulação atmosférica, foram realizados dois experimentos numéricos, em alta resolução (12 km), com o Regional Climate Model – version 4 (RegCM4): um denominado de controle (CTRL) e outro em que a topografia foi removida (STOPO). O período das simulações foi de novembro de 2008 a fevereiro de 2009. A temperatura do ar simulada no experimento CTRL foi validada através de comparação com a Climate Forecast System Reanalysis (CFSR), enquanto que a precipitação com as estimativas do Tropical Rainfall Measuring Mission (TRMM). Ambas as variáveis simuladas também foram comparadas com dados medidos em estações meteorológicas convencionais do Instituto Nacional de Meteorologia (INMET). Entre os resultados têm-se que a ausência da topografia conduz a maiores temperaturas médias mensais e acumulados de precipitação, bem como a desconfiguração da circulação de brisa de vale e montanha sobre a RSMG. Palavras-chave: Sul de Minas Gerais. Topografia. Modelo Climático. A B S T R A C TThe Southern Region of the Minas Gerais State (RSMG) has rugged topography, such as the Serra da Mantiqueira. Due to this peculiar feature, in general, climate models with coarse horizontal resolutions may not represent adequately the climate of this region. To identify impacts of RSMG topography on air temperature, precipitation and atmospheric circulation, two high resolution (12 km) numerical experiments were performed using the Regional Climate Model - version 4 (RegCM4): a control simulation (CTRL) and a second one with removed topography (STOPO). The simulation period was from November 2008 to February 2009. Simulated air temperature fields from CTRL were validated against Climate Forecast System Reanalysis (CFSR), and rainfall against Tropical Rainfall Measuring Mission (TRMM) ground estimates. Simulated variables were also compared with data from conventional meteorological stations of the National Institute of Meteorology (INMET). Among the results we highlight that average monthly temperatures and precipitation increase, and the circulations of valley and mountain breeze are obliterated with suppressed topography.Keywords: Southern Minas Gerais. Topography. Climate Model.
Article 1 Read 0 Citations A influência da topografia da região sul de Minas Gerais nas variáveis atmosféricas simuladas com o RegCM4 Debora Martins Oliveira, Michelle Simões Reboita, Rosmeri Po... Published: 01 January 2018
Revista Brasileira de Geografia Física, doi: 10.26848/rbgf.v11.3.p758-772
DOI See at publisher website ABS Show/hide abstract
A região sul do estado de Minas Gerais (RSMG) possui topografia acidentada tendo como destaque a Serra da Mantiqueira. Devido a essa característica peculiar, em geral, os modelos climáticos com resoluções horizontais grosseiras não conseguem representar adequadamente o clima da região. A fim de identificar o impacto da topografia da RSMG na temperatura do ar, precipitação e circulação atmosférica, foram realizados dois experimentos numéricos, em alta resolução (12 km), com o Regional Climate Model – version 4 (RegCM4): um denominado de controle (CTRL) e outro em que a topografia foi removida (STOPO). O período das simulações foi de novembro de 2008 a fevereiro de 2009. A temperatura do ar simulada no experimento CTRL foi validada através de comparação com a Climate Forecast System Reanalysis (CFSR), enquanto que a precipitação com as estimativas do Tropical Rainfall Measuring Mission (TRMM). Ambas as variáveis simuladas também foram comparadas com dados medidos em estações meteorológicas convencionais do Instituto Nacional de Meteorologia (INMET). Entre os resultados têm-se que a ausência da topografia conduz a maiores temperaturas médias mensais e acumulados de precipitação, bem como a desconfiguração da circulação de brisa de vale e montanha sobre a RSMG. Palavras-chave: Sul de Minas Gerais. Topografia. Modelo Climático. A B S T R A C TThe Southern Region of the Minas Gerais State (RSMG) has rugged topography, such as the Serra da Mantiqueira. Due to this peculiar feature, in general, climate models with coarse horizontal resolutions may not represent adequately the climate of this region. To identify impacts of RSMG topography on air temperature, precipitation and atmospheric circulation, two high resolution (12 km) numerical experiments were performed using the Regional Climate Model - version 4 (RegCM4): a control simulation (CTRL) and a second one with removed topography (STOPO). The simulation period was from November 2008 to February 2009. Simulated air temperature fields from CTRL were validated against Climate Forecast System Reanalysis (CFSR), and rainfall against Tropical Rainfall Measuring Mission (TRMM) ground estimates. Simulated variables were also compared with data from conventional meteorological stations of the National Institute of Meteorology (INMET). Among the results we highlight that average monthly temperatures and precipitation increase, and the circulations of valley and mountain breeze are obliterated with suppressed topography.Keywords: Southern Minas Gerais. Topography. Climate Model.
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