Host: The Association of Japanese Geographers
Name : Annual Meeting of the Association of Japanese Geographers, Spring 2025
Date : March 19, 2025 - March 21, 2025
In recent years, extreme weather events such as heat waves, forest fires, floods and droughts have been frequently reported around the world as a result of global warming. Reports by the IPCC and the Ministry of the Environment have clearly identified greenhouse gas emissions as the cause. However, since these studies are mainly conducted on a global scale, it is difficult to reflect the changes in the regions close to where people live.
In this study group, we have clarified the climatological characteristics of regions in Japan by using not only the AMeDAS data of the Japan Meteorological Agency but also meteorological observations to study the process of temperature increase associated with global warming. The classification of pressure patterns over the past 50 years has also revealed that the frequency of occurrence of summer pressure patterns has changed in recent years, with the south-south high-low and full-surface anticyclone types increasing, and these two types together accounting for nearly 80% of the total. This may be related to the recent increase in the frequency of extreme high temperatures in summer. The southern high and the northern low and the all-over high pressure type can be regarded as two types of atmospheric pressure pattern in which the area around Nobi Plain becomes hotter, but since each type shows a different tendency in wind flow, the characteristics of higher temperature in the city are expected to show different trends.
The purpose of this study is to clarify the characteristics of high temperature in summer by investigating the actual conditions of temperature distribution in each of the two types of atmospheric pressure pattern, namely the low south high and low north low, and the all-over high.
