Abstract
The aim of this work was to determine the predominant winds speeds and directions in the Tangará da Serra region, locate in Southwest of Mato Grosso State, Brazil. So that, it was used meteorological time series from 2003 to 2008, collected through an Universal Anemometer, installed 10 meters above the ground surface in the Automatic Weather Station by the INMET - Meteorology National Institute at the Mato Grosso State University - UNEMAT (14º39' S, 57º25' W and 321,5 m). The predominant winds directions were characterized by the frequency analysis of daily observations from each month of the year. The months that showed higher speeds were: May, June, July, August and September. March showed the lower average and the lower maximum speeds. In all months, the diurnal winds were higher than the nocturnal ones, the strongest winds had occurred during the warmer hours of the day, i.e. from 13:00 to 17:00 h (local time). The monthly maximum gusts had varied from 15.1 m s-1 in June to 30.7 m s-1 in August. In most months of the year there is a predominance of winds from the Northeast (NE), except August and September period, when the winds predominant directions is from the South (S).
Highlights
The wind is one of the most important meteorological elements and it has many applications in several research areas, this is still shortly studied, especially in the Mato Grosso State, Brazil. Among those several applications of the wind direction and speed, it is highlighted here its important contribute in the smoke and soot scattering from the sugar-cane straw burning, specially in regions that has some sugar cane factories that has this practice of burning in this culture aiming to facilitate the harvest
Studies of winds directions contribute on many activities: winds-break installations, aiming to protect plants from the direct winds action; assistance on industrial installations in urban areas, in way that its not affect the residential areas; contribute to the thermal comfort subject in the architecture and building constructions studies that aim better ventilated constructions, according to the doors and windows positions, faced or not the predominant winds directions; the winds are important in the subjects connected to the water economy, because its influence on the evapotranspiration and water heat and steam transference (Galvani et al, 1999)
There is a predominance of winds from the Northeast and North in mostly of year, excepted by the April with predominance Southeast, May with predominance Southeast and South, August and September period, in which the winds predominant direction is from South (S), and the average speeds are higher
Summary
The wind is one of the most important meteorological elements and it has many applications in several research areas, this is still shortly studied, especially in the Mato Grosso State, Brazil. Among those several applications of the wind direction and speed, it is highlighted here its important contribute in the smoke and soot scattering from the sugar-cane straw burning, specially in regions that has some sugar cane factories that has this practice of burning in this culture aiming to facilitate the harvest. The winds-breaks location, useful in the combined agriculture, depends mainly on the winds predominant directions knowledge and it is a factor that often causes disturbers or harmful impact on the agroecosystem
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