Concentracao de Monoxido de Carbono (CO) No AR COMO Parametro de Pureza (Carbon Monoxide (CO) Concentration in the Air as a Purity Parameter)

摘要

Carbon monoxide (CO) is a natural component of the atmosphere and is part of important chemical cycles, especially as ozone references. Processes of combustion can add CO to the atmosphere, and in this case can represent a precursor of ozone. To determine quantitatively how far large industrial centers affect the atmosphere of natural ecosystems, the Ozone Laboratory of INPE recently installed an ultra-sensitive CO sensor capable of detecting several parts per billion CO. Initial measurements were achieved in Sao Jose dos Campos, Cachoeira Paulista, Via Dutra, Belem (PA), and Horto Florestal de Campos do Jordao. The major concentrations were observed in Sao Jose dos Campos where the concentrations were greater than from Horto Florestal by a factor of 3 to 6 times. The concentration measurements on the surface were greatest in the morning, decreasing through dilution in the mixing layer about 2 hours before the middle of the day.