Estudo da camada limite noturna na interface Rio-Floresta
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2012-03-29Autor
http://lattes.cnpq.br/3925768576575087
SILVA, Raphael Pablo Tapajós
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The present study highlights the importance of studying the atmospheric boundary layer
(ABL) in the Amazon, specifically the Nocturnal Boundary Layer (NBL), emphasizing
the importance of the behavior of ABL in River-Forest interface. The characterization
by means of surveys conducted with tethered balloon on the east side of the Rio
Tapajós, showed no significant variations from night to night. However, when rainy, the
values of temperature decrease potential from 0.5 to 1.5 ° C increase in the specific
humidity from 0.5 to 1.5 g / kg. The height of the NBL, estimated from the Potential
Temperature (criterion 1) and Virtual Temperature Potential (criterion 2) profiles, have
values very similar, ranging from 50 meters in the evening until around 200 meters
early in the morning. The condition of static and dynamic stability was exhibited
similarly stable with a layer around 150 meters overnight. From the data of the weather
station was possible to verify the change in climate for the study area, showing that
there are differences in rainfall totals compared with the values for the around region. It
was also observed that 30% of 281 days of 2011 have analyzed the river breeze with
more than two hours and days in 50% of the channeling of the wind from north to south
due to the topography of the region. Soundings taken at specific times, which occurred
river breeze, showed differences between the characteristics of atmospheric levels
where data are for the breeze of the river and forest, emphasizing the complexity of
studying the physics of the atmosphere in interface forest-river.
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