Estudo das camadas limites planetárias marinha e continental na região do Centro de Lançamento de Alcântara / Study the planetary boundaries layers marine and continental in region of the Alcântara Space Launching Center

AUTOR(ES)
DATA DE PUBLICAÇÃO

2002

RESUMO

The Planetary Boundary Layer (CLP) over the ocean and continent is investigated at the north part of the Maranhão State coastline. With this purpose, the structure these CLPs is examined using observational data and numerical studies. Simultaenous radiossonde data were collacted and used in this study. The tri-dimensional mesoecale model (RAMS) is applied to compare the two boundary layers and for the study the sea breeze circulation at the Alcantara Space Launching Center (CLA). Larger amplitude of daily air temperature and relative humidity are observed at the CLA. The predominant wind above the CLA is from northeast and in the ocean is northeast-southeast. Vertical profiles of marine and continental atmosphere are similar. The continental convective boundary layer responds faster to the daily cycle of the solar radiation. The major growth of the convective layer over the continent occurs at 15:00 local hour and at 18:00 local hour over the ocean. The contrast in roughness and surface heating between the continent and the ocean develops local circulation cells along the coastline. The analysis of the North-South wind component shows that the wind over the CLA is intensificed due to the sea breeze.

ASSUNTO(S)

simulation região tropical camada limite planetária meteorology tropical regions simulação meteorologia sea breeze planetary boundary layer atmospheric sounding sondagem atmosférica brisa marítima

ACESSO AO ARTIGO

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