1
ponencia
Publicado 2024
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Presenta información sobre el uso de datos climáticos enfocados en la investigación científica en el SENAMHI, y expone aplicaciones científicas de dichos datos.
2
ponencia
Publicado 2023
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Describe la experiencia de la reunión estratégica centrada en las tendencias y avances en el Sistema de Cómputos de Alto Rendimiento (HPC) y su comprensión en el manejo de los sistemas HPC y su aplicación directa en los procesos meteorológicos. Asimismo, explica las capacitaciones técnicas y científicas realizadas en Buenos Aires donde se abordó el avance significativo para SENAMHI en el manejo de Sistemas de Cómputo de Alto Rendimiento (HPC) aplicados a la meteorología, consolidando su infraestructura tecnológica mediante discusiones técnicas. Esta reunión permitió, la interacción directa con expertos de SMN-A y la exploración de sus instalaciones de HPC proporcionado una visión práctica que complementa los conocimientos teóricos. Esto abre nuevas posibilidades para la aplicación de modelos avanzados en las operaciones diarias de SENAMHI, especialmente en la mejora ...
3
artículo
Publicado 2025
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Due to its complex topography, the Lake Titicaca region, located in the southern tropical Andes, presents great challenges for atmospheric modeling. This study aims to improve the representation of precipitation and air surface temperature using the Weather Research and Forecasting (WRF) model at high spatial resolution (2 km), during the austral summer of 2020. We conducted 11 experiments with different configurations of topography, land use, physical parameterizations, and lake surface temperature (LST). Each experiment was evaluated considering in-situ data from the Peruvian-Bolivian region and gridded precipitation products. For precipitation, the best configuration, with an average bias close to zero mm, includes using the GMTED2010 topography (not smoothed) and the land use data of Eva et al. (2004), along with the Purdue Lin microphysics and the Grell 3D cumulus scheme. For air te...
4
artículo
We evaluate the benefits of the use of a regional coupled model over its stand-alone atmospheric component when forced by reanalysis data in the simulation of the South American climate. We find that the coupling allows for a better simulation of important features of the atmospheric circulation and surface temperature. The simulated 2 meters air temperature is improved over most of the continent, the sea level pressure over the South Pacific Anticyclone area is better represented in the coupled simulation and the location of the ITCZ is improved during the austral winter. The precipitation, especially over the Andes, benefits less from the coupling, although a more realistic humidity transport leads to a reduction of the precipitation biases over extensive regions. The austral summer precipitation bias is reduced in areas such as eastern Colombia, northern Bolivia, eastern Brazil and ce...
5
artículo
Publicado 2024
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South America’s hydroclimate sustains vibrant communities and natural ecosystems of extraordinary biodiversity including the Andes Cordillera, and the Orinoco, La Plata, and Amazon basins. Global warming and land-use change are endangering ecosystem health, exacerbating hydrometeorological extremes, and threatening water and food security for millions of people on the continent (Castellanos et al. 2022). Reductions in rainfall and streamflow have been observed in southern Amazonia, the Cerrado region, northeast Brazil, and Chile (Muñoz et al. 2020; Garreaud et al. 2020; Espinoza et al. 2019; Fu et al. 2013). The increased aridity has affected agricultural yield, water supply for reservoirs, hydropower generation and impacted tens of millions of people in the large metropolitan areas of Sao Paulo, Rio de Janeiro, and Santiago de Chile (Nobre et al. 2016). Andean glaciers, an important ...
