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. This work used micrometeorological measurements of temperature and wind in order to characterize the turbulence due to wind in a terra firme forest in central Amazonia as part of the ATTO-CLAIRE / IOP-1 (2012) ( Amazon Tall Tower Observatory – Cooperative LBA Airborne Regional Experiment / Intensive Observation Period – 2012 / LBA – Large Scale Biosphere-Atmosphere Experiment in the Amazon ). This research was conducted at the Uatuma ATTO Sustainable Development Reserve in the State of Amazonas, Brazil, from February to September, 2012, and used data from February 26 to September 07, 2012, dates that partially encompass the wet and dry seasons, respectively. The ATTO site has 5 towers: one that is 320m, and four that are 80 m in height, and this research was conducted on an 80 m triangular tower. A total of ten 3D and 2D ultrasonic anemometers were installed on the tower, and the importance of these instruments used for flux measurements is also evident when taking into account the fact that the dissemination and diffusion of seeds and chemical composts in the forest happens through the action of turbulent fluxes. In order to understand the wind profile, the inflection point of the wind velocity, and coherent structures (ECs) and local turbulence, box-plot diagrams, quadrant analyses, wavelet potential spectrum, and energy potential analyses were conducted. The turbulence characterized at the ATTO had a roll or ramp structure during the study period, which represents favorable conditions for the maintenance of the forest during the wet and dry seasons in the Central Amazon. Keywords : inflection point, ramp, wavelet, turbulence. RESUMO. Este trabalho faz uso de medidas micrometeorologicas de temperatura e vento, com finalidade de caracterizar a turbulencia aerotransportada em uma floresta de terra firme na Amazonia Central, realizadas no experimento ATTO-CLAIRE / IOP-1 (2012) ( Amazon Tall Tower Observatory – Cooperative LBA Airborne Regional Experiment / Intensive Observation Period – 2012 / LBA – Large Scale Biosphere-Atmosphere Experiment in Amazonia ), no sitio do ATTO, na Reserva de Desenvolvimento Sustentavel do Uatuma – AM (Brasil) nos meses de fevereiro a setembro de 2012, com dados analisados a partir do dia 26 de fevereiro de 2012 ate o dia 7 de setembro de 2012, entre as estacoes umida e seca na Amazonia Central, no complexo de torres altas composta de 5 (cinco) torres; uma de 320 m e 4 (quatro) de 80 m. Este trabalho foi realizado na torre triangular (80 m). Foram instalados 10 (dez) anemometros ultrassonicos de 3D e 2D. Equipamentos necessarios em metodo de fluxos, visto que, a disseminacao e difusao de sementes e compostos quimicos da floresta, faz-se tambem por fluxos turbulentos. Para compreensao do perfil de vento, ponto de inflexao do perfil da velocidade do vento, estruturas coerentes e a turbulencia local, para tal desenvolveu-se a partir dos dados processados, diagrama de caixa ( box-plot ), analise de quadrantes, espectro de potencia em ondeletas, espectro de energia. A turbulencia caracterizada no ATTO, foi de estruturas do tipo “rolo” ou rampa, para o periodo estudado, condicoes favoraveis para manutencao da floresta em periodo umido-seco na Amazonia Central. Palavras-chave : ponto de inflexao, rampa, ondeleta, turbulencia.

revista brasileira de geofísica

A BRIEF OBSERVATION OF THE FORMATION OF COHERENT STRUCTURES AND TURBULENCE OVER A RAIN FOREST AREA IN CENTRAL AMAZÔNIA: THE ATTO-CLAIRE/IOP – 1/2012 EXPERIMENT