ALMEIDA, E. E.; ALMEIDA, Edglay Enéas de.
Resumo:
In this study, an attempt is made to investigate some aspects of the vertical
structure of the atmosphere over the southern tropical Atlantic Ocean. For this
purpose radiossonde data (temperature of air, geo-potential height, direction and
velocity of the wind ), reanalyzed fields of the NCEP and pictures of the Meteosat-
5 Satellite in the infra-red channel provided by the CPTEC/INPE. Were used the
radiossonde data had been collected on board of the NOc Antares during the
period starting from March 13 to April 2 of 1997. The potential temperature
profiles show a conditionally unstable atmosphere, which is associated with the
presence of trade winds close to the surface. The behavior of 9 and 0e are linked
to the intensity and direction of the wind in the first 300m above of the surface.The
temperature inversion seen in the profiles of equivalente potencial temperature in
the lower levels is related to the intensity of the Subtropical Atlantic High. The
values observed in the direction and intensity of the winds seen in the
radiossonde are in coherence with the reanalyzed fields of the NCEP. The fields
of vorticity, divergence and vertical movements through the analyses, explain the
amount of existing cloudiness in the area under study.