Incluindo Funcionalidades no Modelo BRAMS para Simular o Transporte de Cinzas Vulcânicas: Descrição e Análise de Sensibilidade Aplicada ao Evento Eruptivo do Puyehue em 2011

Pavani, Cláudio A. B.; Freitas, Saulo R.; Lima, W.; Coelho, Simone Marilene Sievert da Costa; Rosário, Nilton E.; Moreira, Demerval Soares; Yoshida, Marcos Cezar

doi:10.1590/0102-778631231420150035

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…Cloud and drizzle number concentrations are computed from cloud condensation nuclei (CCN) and giant CCN (GCCN) concentrations, respectively. A lookup table (LUT) is used to obtain the CCN concentration that is activated as a function of aerosol size, concentration, and composition via hygroscopicity parameter (Petters and Kreidenweis, 2007), as well as updraft velocities, pressure, and temperature. On the other hand, GCCN activation does not depend on the environmental conditions, being completely used in the drizzle nucleation process.…”

Section: Two-moment Parameterization From Rams/csumentioning

confidence: 99%

“…Aerosol activation also uses a LUT of activated fraction determined by temperature, vertical velocity, aerosol number concentration, and hygroscopicity parameter determined by the model. The LUT was built following Köhler activation theory within a parcel model from Feingold and Heymsfield (1992) with additional changes by Eidhammer et al (2009) to use the hygroscopicity parameter (Petters and Kreidenweis, 2007). This approach is similar to the one used by RAMS Figure 1.…”

Section: Thompson Cloud Microphysicsmentioning

confidence: 99%

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The Brazilian developments on the Regional Atmospheric Modeling System (BRAMS 5.2): an integrated environmental model tuned for tropical areas

et al. 2017

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Abstract. We present a new version of the Brazilian developments on the Regional Atmospheric Modeling System (BRAMS), in which different previous versions for weather, chemistry, and carbon cycle were unified in a single integrated modeling system software. This new version also has a new set of state-of-the-art physical parameterizations and greater computational parallel and memory usage efficiency. The description of the main model features includes several examples illustrating the quality of the transport scheme for scalars, radiative fluxes on surface, and model simulation of rainfall systems over South America at different spatial resolutions using a scale aware convective parameterization. Additionally, the simulation of the diurnal cycle of the convection and carbon dioxide concentration over the Amazon Basin, as well as carbon dioxide fluxes from biogenic processes over a large portion of South America, are shown. Atmospheric chemistry examples show the model performance in simulating near-surface carbon monoxide and ozone in the Amazon Basin and the megacity of Rio de Janeiro. For tracer transport and dispersion, the model capabilities to simulate the volcanic ash 3-D redistribution associated with the eruption of a Chilean volcano are demonstrated. The gain of computational efficiency is described in some detail. BRAMS has been applied for research and operational forecasting mainly in South America. Model results from the operational weather forecast of BRAMS on 5 km grid spacing in the Center for Weather Forecasting and Climate Studies, INPE/Brazil, since 2013 are used to quantify the model skill of near-surface variables and rainfall. The scores show the reliability of BRAMS for the tropical and subtropical areas of South America. Requirements for keeping this modeling system competitive regarding both its functionalities and skills are discussed. Finally, we highlight the relevant contribution of this work to building a South American community of model developers.

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Section: Two-moment Parameterization From Rams/csumentioning

confidence: 99%

Section: Thompson Cloud Microphysicsmentioning

confidence: 99%

The Brazilian developments on the Regional Atmospheric Modeling System (BRAMS 5.2): an integrated environmental model tuned for tropical areas

et al. 2017

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“…During the event, GOES-12 was operating as GOES-East. Figure 8 GOES-12 images together with a chemical transport model [Coupled Aerosol and Tracer Transport Model within the Brazilian Developments on the Regional Atmospheric Modeling System (CATT-BRAMS); Freitas et al 2017] were used to monitor in real time the volcanic ash traces and predict possible risk areas (Costa et al 2012;Pavani et al 2016). The Argentinean Naval Hydrographic Service (SHN) in collaboration with the Argentinean National Meteorological Service also explored the GOES imagery coupled with an ash dispersion model to monitor this event (Collini et al 2015).…”

Section: Case Studies Cptec-inpe Has High Demandmentioning

confidence: 99%

A Successful Practical Experience with Dedicated Geostationary Operational Environmental Satellites GOES-10 and -12 Supporting Brazil

Costa

Negri

Ferreira

et al. 2018

Bulletin of the American Meteorological Society

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This paper summarizes the successful use of Geostationary Operational Environmental Satellite-10 (GOES-10) and -12 (GOES-12), mainly beyond their retirement as operational satellites in the United States, in support of meteorological activities in South America (SA). These satellites were maneuvered by the National Oceanic and Atmospheric Administration (NOAA) to approximately 60°W, enabling other countries in Central and South America to benefit from their ongoing measurements. The extended usefulness of GOES-10 and -12 was only possible as a result of a new image geolocalization system developed by NOAA for correcting image distortions and evaluated in collaboration with the Brazilian National Institute for Space Research. The extension allowed GOES-10 and -12 to monitor SA for an additional 7 years proving the efficiency of this navigation capability implemented for the first time in the GOES series well beyond the expected satellites’ lifetime. Such successful capability is incorporated in the new-generation GOES-R series. This practical and technological experience shows the importance of communication between scientists from the United States and SA for advancing Earth’s monitoring system through the development of novel software and derived products. For SA in particular, GOES-10 and -12 were employed operationally to monitor dry spells, relevant for agriculture and forest fire management and to nowcast severe weather for flash flood warnings. Additionally, GOES-12 detected the first registered tropical hurricane over the Brazilian coast. This paper describes some of the technical and operational challenges faced in extending the GOES-10 and -12 missions to provide coverage over South America and emphasizes the usefulness of their ongoing measurements benefiting Brazilian environmental monitoring.

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Bulk cloud microphysical properties as seen from numerical simulation and remote sensing products: case study of a hailstorm event over the La Plata Basin

Vara-Vela,

Machado Crespo,

Vendrasco

et al. 2024

J. South. Hemisph. Earth Syst. Sci.

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Hailstorms develop over the La Plata Basin, in south-eastern South America, more often during later winter and early austral spring, between September and October. These systems have significant socioeconomic impacts over the region. Thus, a better understanding of how atmospheric drivers modulate the formation of hailstorms is important to improve the forecast of such phenomena. In this study, we selected a hailstorm event observed over the eastern La Plata Basin during 14–15 July 2016 to evaluate the performance of the Brazilian developments on the Regional Atmospheric Modelling System (BRAMS) model. The ability of the model in simulating cloud microphysical properties was evaluated by comparing simulations driven by different global forcings against in situ and remote sensing observations. The model results showed good skill in capturing the basic characteristics of the thunderstorm, particularly in terms of the spatial distribution of hydrometeors. The simulated spatial distribution of hail covers locations where hail fall was reported. The BRAMS simulations suggest that, despite relatively low values of the convective available potential energy (CAPE) (700–1000 J kg−1), environments with strong 0–8-km bulk shear (60–70 kt, ~30.9–36.0 m s–1) can promote the formation of ice clouds and hail fall over the eastern La Plata Basin. To be more conclusive, however, further research is needed to understand how different combinations of CAPE and shear affect hail formation over the region.

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Incluindo Funcionalidades no Modelo BRAMS para Simular o Transporte de Cinzas Vulcânicas: Descrição e Análise de Sensibilidade Aplicada ao Evento Eruptivo do Puyehue em 2011

Cited by 3 publications

References 12 publications

The Brazilian developments on the Regional Atmospheric Modeling System (BRAMS 5.2): an integrated environmental model tuned for tropical areas

The Brazilian developments on the Regional Atmospheric Modeling System (BRAMS 5.2): an integrated environmental model tuned for tropical areas

A Successful Practical Experience with Dedicated Geostationary Operational Environmental Satellites GOES-10 and -12 Supporting Brazil

Bulk cloud microphysical properties as seen from numerical simulation and remote sensing products: case study of a hailstorm event over the La Plata Basin

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