Based on 26-years (1982-2007) data set, a diagnostic study on the vertical structure
of air temperature, dew point temperature and relative humidity observed over
Belém-PA, during the months of November, is presented in this work. The analysis
were conducted for two contrasting composites considering the precipitation regime:
the rainy years and of dry years, which were established objectively using percentiles
method. Overall, the composites demonstrated that the temperature and moisture
profiles are abnormally warmer (colder) and wetter (drier) in association with the
rainfall above (below) of normal in the Belém region. The results showed that the
main difference in profiles studied, comparing wet and dry years, occurs in the
atmospheric layer between the tropospheric medium and high levels (between the
700 hPa and 400 hPa patterns pressure levels). In this layer, the difference between
air temperature, dew point and moisture is significantly higher associated with
enhanced convection and precipitation.
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