2023年秋の大会

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VII. 保健物理と環境科学 » 保健物理と環境科学

[2J09-20] 環境放射能

2023年9月7日(木) 14:45 〜 17:55 J会場 (ES総合館2F ES025)

座長:砂川 武義(福井工大)

15:45 〜 16:00

[2J13] 数値シミュレーションに基づく北半球の210Pb沈着量分布

*蔡 宇1、山澤 弘実2、飯本 武志1 (1. 東京大学、2. 名古屋大学)

キーワード:大気輸送モデル、Pb-210、Rn-222、自然放射線

To enhance understanding of 210Pb deposition distribution characteristics, this study investigated the distribution characteristics of 210Pb deposition in the Northern Hemisphere in 2015. Using the WRF and HIRAT models with a 144 km * 144 km lattice size. Our findings reveal a strong correlation between the distribution of 210Pb and latitudinal variations, as well as atmospheric circulation patterns. Moreover, we noticed a distinct seasonal variation in the residence time of 210Pb in the continental atmosphere, with longer durations during winter and shorter during summer. Notably, we identified a significant source of high deposition in the Sea of Japan region, which is a matter of great concern. Our analysis indicates that this deposition predominantly originates from the continental area upwind.