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DUTOS TROPOSFÉRICOS E A ESTRUTURA DA CAMADA LIMITE PLANETÁRIA NA REGIÃO DE PETROLINA

2016; UNIVERSIDADE FEDERAL DE SANTA MARIA; Volume: 38; Linguagem: Inglês

10.5902/2179460x20243

ISSN

2179-460X

Autores

Leandro Sousa, Magaly de Fátima Correia, Maria Regina da Silva Aragão, Roberta Everllyn Pereira Ribeiro,

Tópico(s)

Radio Wave Propagation Studies

Resumo

The planetary boundary layer (PBL) structure is investigated focusing on days with low-tropospheric ducts occurrence in the Petrolina-PE region, in the period from 1 to 29 April 2014. Ducts identification and the estimative of the PBL top/height and its dynamic and thermodynamic characterization is based on 12 UTC upper-air soundings launched at the altitude station of Petrolina. Surface ducts are associated with high instability and wind speed intensification in the surface layer. Ducts at the PBL top (elevated ducts) are associated with a decrease in the moisture content of the air and a wind speed maximum, above the PBL, in the low-troposphere.

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