Explore the oxygen isotope composition of Earth's atmosphere in this 26-minute conference talk from the Mineralogical Society of America's Short Course on Triple Oxygen Isotope Geochemistry. Delve into the topic's brief history, key equations, rate coefficients, and exchange reactions. Examine delta 17 values, nitrate and sulfate studies, and the motivation behind this research. Learn about governing atmospheric equations, initial number density results, and the Vulcan model. Gain insights from the presented findings and conclusions, followed by a Q&A session. This presentation by Marah Brinjikji and James R. Lyons offers a comprehensive overview of atmospheric oxygen isotope composition for geochemistry enthusiasts and researchers.