210Pb deposition in the far East Asia: Controlling factors of its spatial and temporal variations
Resource
International Topical Conference on 210Po and 210Pb, Seville, Spain, 26-28 October, (2009)
Journal
Journal of Environmental Radioactivity
Journal Volume
102
Journal Issue
5
Pages
514-519
Date Issued
2011
Author(s)
Abstract
In order to better understand the behavior of (210)Pb deposition in Far East Asia, comprehensive data of monthly (210)Pb deposition, which includes several time-series and spatial distribution data at 14 stations in Japan and 2 stations in Taiwan, were analyzed. Pb-210 deposition at most of the sites exhibited a typical seasonal change with higher values in winter and lower values in summer; especially, the greatest (210)Pb deposition in the world occurred in winter at sites beside the Japan Sea. The deposition behavior of (210)Pb in Far East Asia differed between winter and summer. The meteorological phenomenon peculiar to winter of the Japan Sea side, i.e., formation of the Japan Sea convergence zone, might cause the high (210)Pb concentration in rainwater, as may heavy snowfall. The (210)Pb concentration in rainwater showed long-term variability, although this differed between winter and summer. This long-term variability may be related to climatological factors such as El Niño.
SDGs
Type
journal article