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Characterization of Atmospheric Boundary Layer in Amazon Forest and Pasture: ABRACOS/RBLE Studies

This study explores the atmospheric boundary layer (ABL) characteristics over forest and pasture regions in the Amazon, comparing measurements from ABRACOS/RBLE during the dry season (1999) and the wet season (1999). Utilizing data from notable sites such as Faz. N. S. Aparecida and Rebio Jaru, we analyze entrainment processes, the development of the convective boundary layer (CBL), and the residual layer in varying conditions. Our findings contribute to understanding the diurnal cycle and how rainfall influences ABL dynamics, revealing crucial interactions within this vital ecosystem.

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Characterization of Atmospheric Boundary Layer in Amazon Forest and Pasture: ABRACOS/RBLE Studies

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  1. The atmospheric boundary layer characteristics over forest and pasture in the AmazonGilberto Fisch (CTA)

  2. entrainment CBL zone residual layer NBL sunrise noon sunset

  3. Observations - ABRACOS/RBLE 1999(dry season)- LBA/TRMM 1999(wet season)

  4. Brazil

  5. Pasture site: Faz. N. S. Aparecida - Ouro Preto D´Oeste

  6. Forest site: Rebio Jaru

  7. Boundary layer measurements

  8. Surface Instruments

  9. Rainfall distribution

  10. Development of the CBL Fisch et al. (2004)

  11. Time evolution of the CBL over forest and pasture during RBLE/ABRACOS Richardson number criteria, Oliveira e Fisch (2000)

  12. Development of the NBL heights (m) Santos and Fisch (2004)

  13. Erosion of the NBL

  14. D R Y W E T

  15. LBA/RACCI 2002

  16. Sept 2002

  17. Oct 2002

  18. precipitation ABRACOS

  19. Diurnal cycle

  20. Time seris of aerosols – abracos From Artaxo (2004)

  21. Sensible Heat Fluxes P H A S E I P H A S E II

  22. Typical Characteristics- height,  , q

  23. Convective Event – ABRACOS

  24. Rainfall influence Oct 19, 2002 BLACK- 14 UTC, BLUE – 17 UTC and RED-21 UTC

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