Recently, there has been an increased interest in O3 and So2 due to the ill-defined impacts of O3 and So2 radiative forcing and climate change. One criticism of much of the literature on these parameters is that the parameters have never been determined in UV by using Brewer#121 software. This study aims to explore O3 and So2 in tropical regions, resulting in an improved understanding of O3 and So2 climatology (248 words).