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In this study, sonic anemometry measurements at 16 vertical levels of the ATTO tower were used to evaluate the temporal variation of the multiresolution (co)spectra of the wind speed and temperature components. This methodology made it possible to visualize, over a large vertical extent, which scales of turbulent movement contribute most to turbulent kinetic energy and turbulent transport of a quantity over the Amazon rainforest. In this respect, it was also possible to identify the turbulent scales most effective in the entrainment process in the early morning. The multiresolution analysis also highlighted the need to determine the scale of the spectral gap in order to obtain more robust estimates of turbulent fluxes, even for the daytime period. [ABSTRACT FROM AUTHOR]

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Understanding the water and carbon exchange in the soil-atmosphere system and the mechanisms that control these exchanges are fundamental to have a real and adequate representation of the physical processes involved. Under stable night conditions, carbon transfer processes such as respiration and water transfer processes such as dew deposition are more difficult to study by the eddy covariance method. Thus, the aim of this study is to investigate the mechanisms that control the exchange of water and carbon dioxide near a thermal power plant and the ocean, through the gradients of concentration of these quantities at different levels in the atmosphere. Data from the experimental site located in Linhares - ES - Brazil (19 ° 31'53 "S, 39 ° 48'03" W), 4 km from the coast and about 250 m from Linhares Geração SA thermeletric, were used.2 and H2O are measured by the AP200-Campbell system, which consists of vertically arranged chambers that pull gas flow at the following levels 1, 2, 5, 9, 15 and 20 m. In this study, a total of 67 nights (from 9 pm to 5 am), from 2017, were selected. The wind direction was from the north so that there was no interference from the thermal plant's feathers in the data analysis. [ABSTRACT FROM AUTHOR]

Multiresolution spectra of both horizontal and vertical wind components observed at a 140-m micrometeorological tower are analysed. The tower is located at the township of Linhares, ES, Brazil, at 4 km from the coast and nest to a thermal power plant. At nighttime, the spectral maximum is located at the largest temporal scales analyzed, being therefore related to nonturbulent low-frequency processes. During the day, spectral maxima of the horizontal wind components show little variation above 20 m. For the vertical component, on the other hand, the temporal scale of such maxima increases steadily with height. [ABSTRACT FROM AUTHOR]

Large Eddy Simulation (LES) have been employed to investigate turbulent flows. In atmospheric turbulence, this methodology is widely used and sometimes is complementary to field experiments, leading a more detailed about turbulent flow. In this work a LES model was utilized to describe the influence exerted by a hot plume, emitted for a thermal power-plant in the atmospheric flow in the planetary boundary-layer. [ABSTRACT FROM AUTHOR]

Copyright of Revista Ciência e Natura is the property of Revista Ciencia e Natura and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Anuario do Instituto de Geociencias is the property of Universidade Federal do Rio de Janeiro, Instituto de Geociencias and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Ciência e Natura is the property of Revista Ciencia e Natura and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Ciência e Natura is the property of Revista Ciencia e Natura and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Ciência e Natura is the property of Revista Ciencia e Natura and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)