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<p>Studies on Convective Boundary Layer Height (CBLH) variability within the Amazon region are scarce. An alternative to obtaining CBLH values is to use reanalysis data, such as ERA5. This study used in situ temperature, humidity, and CO<sub>2</sub> vertical profiles collected from 2010 to 2018 by small aircraft carried out within the scope of the CARBAM project (Long-Term Study of the Amazon Carbon Balance) in Amazonia. The flights were performed at 5 different locations in the Amazon (named SAN, ALF, RBA, TEF, and TAB), with significant variations in land use and land cover. Also, they represent different regional atmospheric processes associated. From the profiles, it was possible to estimate the CBLH values and compare/validate them with data provided by the ERA5. The results showed that ERA5 underestimates CBLH values by 5–12% for four sites (SAN, RBA, TEF, and TAB). At the fifth site (ALF), there was an overestimate of 18%, which can be attributed to the high levels of deforestation in that region. Despite the small differences in CBLH values estimated from ERA5 and experimental profiles, the correlations between them indicated a reasonable performance of ERA5 across several locations and periods investigated within the Amazon biome. These results highlight the reliability of ERA5 for obtaining spatial and temporal CBLH values in the Amazon.</p>

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Assessing the effectiveness of convective boundary layer height estimation using flight data and ERA5 profiles in the Amazon biome

  • 期刊论文

  • 发表日期：

    2025年1月31日

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  • Rayonil Gomes Carneiro,
  • Maísa Mello Ribeiro,
  • Luciana V. Gatti,
  • Carla Maria Alves de Souza,
  • Cléo Quaresma Dias-Júnior,
  • Graciela Tejada,
  • Lucas Gatti Domingues,
  • Zuzanna Rykowska,
  • Cleber Assis dos Santos,
  • Gilberto Fisch

摘要

Studies on Convective Boundary Layer Height (CBLH) variability within the Amazon region are scarce. An alternative to obtaining CBLH values is to use reanalysis data, such as ERA5. This study used in situ temperature, humidity, and CO2 vertical profiles collected from 2010 to 2018 by small aircraft carried out within the scope of the CARBAM project (Long-Term Study of the Amazon Carbon Balance) in Amazonia. The flights were performed at 5 different locations in the Amazon (named SAN, ALF, RBA, TEF, and TAB), with significant variations in land use and land cover. Also, they represent different regional atmospheric processes associated. From the profiles, it was possible to estimate the CBLH values and compare/validate them with data provided by the ERA5. The results showed that ERA5 underestimates CBLH values by 5–12% for four sites (SAN, RBA, TEF, and TAB). At the fifth site (ALF), there was an overestimate of 18%, which can be attributed to the high levels of deforestation in that region. Despite the small differences in CBLH values estimated from ERA5 and experimental profiles, the correlations between them indicated a reasonable performance of ERA5 across several locations and periods investigated within the Amazon biome. These results highlight the reliability of ERA5 for obtaining spatial and temporal CBLH values in the Amazon.