This book includes peer-reviewed articles from INCREASE 2023, Indonesia. It highlights research in the field of Radioscience, Equatorial Atmospheric Science and Environment organized by the Research Center for Climate and Atmosphere (PRIMA) of the National Research and Innovation Agency (BRIN). The symposium aims to provide a scientific platform for students, teachers, and researchers to discuss ideas and current issues in the areas of atmosphere and ocean observation, and prediction, climate change, urban climate, and sustainable development, atmospheric chemistry and air quality, atmosphere-ocean interaction and climate variability, atmosphere and space interaction, paleoclimatology, cloud physics and its application, and atmospheric dynamics and hydrometeorology.