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Provedor de dados:  36
País:  Brazil
Título:  Erosion of the nocturnal boundary layer in the central Amazon during the dry season
Autores:  CARNEIRO,Rayonil Gomes
BORGES,Camilla Kassar
Data:  2020-03-01
Ano:  2020
Palavras-chave:  Planetary boundary layer
Turbulent kinetic energy
Heat flux
NBL erosion
Resumo:  ABSTRACT In this study, the erosion of the nocturnal boundary layer (NBL) was analyzed in the central Amazon during the dry season of 2014, using data from the GoAmazon 2014/5 Project and high-resolution model outputs (PArallelized Les Model - PALM). The dataset consisted of in situ (radiosonde) and remote sensing instruments measurements (Ceilometer, Lidar, Wind Profiler, microwave radiometer, and SODAR). The results showed that the NBL erosion occurred, on average, two hours after sunrise (06:00 local time), and the sensible heat flux provided more than 50% of the sensible heating necessary for the erosion process to occur. After the erosion, the convective phase developed quickly (175.2 m h-1). The measurements of the remote sensors showed that the Ceilometer, in general, presented satisfactory results in relation to the radiosondes for measuring the height of the planetary boundary layer. The PALM simulations represented well the NBL erosion, with a small underestimation (≈ 20 m) at the beginning of this phase. In the final phase of NBL erosion and in the initial stage of the development of the convective boundary layer (CBL), the model presented satisfactory results, with heights of CBL ranging from 800 m to 1,650 m, respectively.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Instituto Nacional de Pesquisas da Amazônia
Relação:  10.1590/1809-4392201804453
Formato:  text/html
Fonte:  Acta Amazonica v.50 n.1 2020
Direitos:  info:eu-repo/semantics/openAccess

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