LUISA D ANTOLA DE MELLO

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    Resumo IPEN-doc 31092
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    Resumo IPEN-doc 30950
    Evaluation of the impacts of stratospheric aerosols on São Paulo after the 2019-2020 wildfires in Australia (Black Summer)
    2024 - LOPES, PEROLA P.Q.; MELLO, LUISA D.; SOUZA, GIOVANNI; LOPES, FABIO J.S.; MOREIRA, GREGORI de A.; LANDULFO, EDUARDO
    In August 2019, a series of wildfires erupted in Australia, later termed "Black Summer," rapidly spreading across various states and consuming a total area of approximately 103,000 square kilometers. This study employed the MSP-Lidar I, an advanced remote sensing system, to analyze aerosol disturbances in the stratosphere above São Paulo, with a focus on altitudes ranging from 15-30 km during January 2020. Through lidar measurements at three different wavelengths, we successfully identified and analyzed the vertical dispersion of aerosol plumes. By utilizing atmospheric modeling, HYSPLIT, the study traced the path of these plumes across the Pacific Ocean to São Paulo. The analysis revealed three distinct plumes at specific altitudes, all originating from the regions affected by the Australian wildfires. This research underscores the effectiveness of the MSP-Lidar I in tracking complex atmospheric phenomena and significantly enhances our understanding of the long-term dynamics of aerosol dispersion. These findings are crucial for air quality and global climate change studies, as they underscore the far-reaching transcontinental impacts of large-scale wildfires. The study highlights the urgent need for international collaboration in monitoring and mitigating the effects of such fires on global atmospheric conditions.
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    Resumo IPEN-doc 30946
    Algorithmic analysis of tropopause height variability in São Paulo utilizing radiosonde data
    2024 - MELLO, LUISA D.; LOPES, PEROLA P.Q.; LOPES, FABIO J.S.; MOREIRA, GREGORI de A.; LANDULFO, EDUARDO
    The tropopause, a fundamental boundary between the troposphere and stratosphere, serves as a crucial indicator of atmospheric stability, influencing the distribution of key trace gases. This paper offers a comprehensive decade-long analysis (2013-2023) of tropopause height variations over São Paulo, examining two distinct definitions: the Cold Point Tropopause (CPT) and the Lapse Rate Tropopause (LRT). Utilizing Radiosonde data to capture vertical profiles of temperature and pressure, our algorithm calculates both CPT and LRT, illustrating their evolution over time. This analysis enables the exploration of seasonal, interannual, and long-term trends, providing valuable insights into the region's atmospheric stability and potential correlations between tropopause variations and significant meteorological events. The results underscore the algorithm's efficiency in extracting tropopause heights from radiosonde data, elucidating the strengths and limitations of both CPT and LRT definitions. Additionally, the findings shed light on the region's climate patterns, offering a foundation for future atmospheric sciences and climate research.