Potencial de formação e impacto do ozônio troposférico nas áreas dos manguezais da região metropolitana do Rio de Janeiro

Abstract

The present work addresses the formation of tropospheric ozone, which arises especially from the interrelationships with photochemical reactions involving emissions of NOx, NO2 and volatile organic compounds (VOCs). In particular, several biomes or phytophysiognomies can be characterized by VOCs emissions and the potential for ozone formation. The investigation focused on the analysis of the VOCs pattern and on the advective processes between the RMRJ atmospheric basins and how each phytophysionomy can contribute to the concentration of these compounds in the atmosphere. The the Atlantic Forest and mangrove were chosen for the study, both types of vegetation covers inserted in the metropolitan region of Rio de Janeiro (RMRJ). The methodology applied to this study involved the estimation of the BCOV concentration by means of field experimental collected data, the measurement of the effect of ozone over vegetation and the use of computational models. The experimental results in a forested environment allowed to discriminate VOCs emission patterns. This rationale was used in the analysis of the mangrove with respect to VOC emission and ozone impact, which allowed comparing with the results of computational modeling, in such a way to make it possible to suggest necessary adjustments for the use of regulatory models. In addition, the study contributed to the understanding of the effects of tropospheric ozone, which causes increased mortality on mangrove seedlings.