Analysis of the trace gases (NO NO2 O3) concentration ando f the NO2 photolysis in the amazon region at the dry season / Análise da concentração de gases traço (NO NO2 O3) e da fotólise de NO2 na região amazônica na época seca

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

With the objective of understanding the relationship between NO2 photolysis and solar global radiation in the Amazon region, and studying the concentration of the gases NO, NO2 and O3, the data collected from July 02 to 28th, 2001, as part of the campaign from the experiment LBA/CLAIRE-2001 (Large Scale Biosphere- Atmosphere / Cooperative LBA Airborne Regional Experiment - 2001) were analyzed. The photolytic reactions have a critical role controlling the abundance of many atmospherical pollutants, decomposing trace gases (that affect the terrestrial radiation balance) and contributing for their removal from the atmosphere. A significant increase of the NO concentration in the beginning of the morning was observed, whereas the NO2 concentration proved to be higher at night. The O3 concentration increases with the sunrise, with its peak at approximately 14h. The curve of NO2 photolysis (J(NO2)) showed similarity to the Rg curve, with the influence of cloudiness. When the NO2 photolysis begins, an inversion of the magnitude of the NO and NO2 with O3 concentration occurs. The NO2 concentration of varied greatly when analyzing the differences between the clear, partially cloudy and cloudy days.

ASSUNTO(S)

radiação solar dióxido de nitrogênio gases traço meteorologia photolysis amazon fotólise amazônia trace gases nitrogen dioxide

ACESSO AO ARTIGO

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