[A-HW22] 流域生態系における物質輸送と循環：源流から沿岸まで

[AHW22-P04] Impact of COVID-19 on air pollutants influx into forest ecosystems in Japan

*伊藤 優子¹、岡本 透¹、高瀬 恵次²、堀澤 栄³ (1.国立研究開発法人　森林総合研究所、2.石川県立大学、3.高知工科大学)

Atmospheric pollution is one of the most important environmental issues both of the industrialized developed and developing countries. The lockdown of cities and the reduction of economic activity as a countermeasure to the spread of COVID-19 led to a rapid improvement in air pollution in many countries. Clarifying the impact of the changes in atmospheric conditions brought about by the COVID-19 pandemic on the local and global environment is important as data for reconstructing the relationship between developing of human activities and global environmental conservation in the future.

We have been monitoring element cycles in several forest watersheds to determine the effects of human activities in the Tokyo metropolitan area and transboundary air pollutants on forest ecosystems. Therefore, we aimed to clarify the effects of decline human activity due to COVID-19 on forest ecosystems using the long-term monitoring data obtained in Ibaraki, Ishikawa, and Nagano prefectures.