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Medidas da concentracao do ciclo diario de CO 2 foram realizadas sobre a superficie do lago da Usina Hidreletrica de Balbina/AM. As medidas foram realizadas com analisador de gas por infravermelho da marca Licor, modelo 7500A. Os dados de concentracao de CO 2 foram analisados e comparados com dados meteorologicos de umidade relativa e precipitacaode uma boia instalada com uma estacao HOBO U-30, localizada no mesmo lago. Este estudo revela um aumento da concentracao de CO 2 no periodo noturno. ABSTRACT Measures the concentration of the daily cycle of CO2 were carried out on the surface of the lake of the Balbina Hydroelectric Plant/AM. The measurements were performed with infrared gas analyzer brand Licor, model 7500A. The CO2 concentration data were analyzed and compared with meteorological data from a buoy fitted with a HOBO U-30 station, located in the same lake. This study reveals an increase in the concentration of CO2 at night.

MEDIÇÕES IN SITU DA CONCENTRAÇÃO DE CO2 EM UM RESERVATÓRIO TROPICAL USANDO LI-7500A E UMA BOIA METEOROLÓGICA