The weather consultancy Tempo OK reported that the month of February ended with below-average solar irradiance levels in the Southeast and Northeast regions of Brazil, impacting photovoltaic energy generation in several states.
According to the company, recurring cold fronts, areas of instability, and the formation of a cyclone off the coast of Southeast Brazil kept the sky overcast for much of the month, reducing the solar radiation available for power plants and distributed generation systems.
Eight states recorded a significant drop in irradiance, with Minas Gerais standing out. São Paulo, Bahia, and Pernambuco also showed a relevant reduction, with an average anomaly of -0,45 kWh/m²/day at various monitored points.
In early February, the formation of a cyclone off the coast of the Southeast Region intensified cloud cover and caused rainfall in Rio de Janeiro, Espírito Santo, and eastern Minas Gerais. According to Jorge Rosas, a meteorologist at Tempo OK, even with higher rainfall volumes in these areas, the clouds moved inland due to high temperatures and available atmospheric moisture.
Between the 6th and 11th, a moisture corridor reinforced the transport of water vapor between the Southeast and North regions, maintaining unstable weather. A similar situation was observed between the 25th and 28th, with a new moisture corridor prolonging conditions favorable to cloud formation and precipitation.
In the Northeast, the presence of an Upper-Level Cyclonic Vortex (VCAN) over the continent for much of the month contributed to the frequent formation of clouds and the maintenance of overcast skies.
According to the consultancy, the meteorological variability observed in February highlights direct impacts on the electricity sector, especially in states with a high concentration of solar power plants. For March, the expectation is for a gradual transition to the dry season, with continuous monitoring of weather conditions to support energy planning.
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