Host: The Association of Japanese Geographers
Name : Annual Meeting of the Association of Japanese Geographers, Spring 2024
Date : March 19, 2024 - March 21, 2024
Fog is a state in which many minute water droplets float in the atmosphere near the ground, and the horizontal visibility is less than 1 km. When dense fog occurs, visibility deteriorates and affects daily life. In addition to temperature and humidity, the formation of fog is also closely related to topography. Fog that occurs from autumn to winter is generally called ``radiant fog,'' and is common in inland areas with basin topography where temperature differences tend to be large. In particular, the Tsuyama Basin in Okayama Prefecture is famous for the occurrence of large-scale fog (Joko et al., 2002). Since meteorological observations were conducted from the late 1990s to 2000, there have been no notable reports of fog occurring in the Tsuyama Basin other than Shigeta (2019). Joko et(2002) reported that fog occurs from the south side of the Tsuyama Basin. However, previous studies in the Tsuyama Basin have not conducted long-term observations, and there are still many unknowns about the mechanism of occurrence.
Therefore, in this study, we verified the relationship between radiation fog dynamics and water vapor content in the Tsuyama Basin using long-term, multi-point meteorological observation data reported in Shigeta (2019).
