Radionuclides as a tracer of material transport in the Pan-Japan Sea area
Masayoshi
Yamamoto, Dr., Professor |
 |
Japan is located to the central latitudes of Far East Asia. Therefore, the prevailing westerlies excel and natural and anthropogenic materials such as sulfur, nitrogen and yellow sand are transported to the Japan and Northern Pacific through the Sea of Japan from the Asian Continent being in wind. Long term (1991-2002) and spatial observation (2000-2002) of atmospheric deposition of 210Pb and 7Be have shown that the deposition level on the Sea of Japan side is much higher than those on the Pacific side, and their deposition pattern has seasonal variation with clear peak in winter season.
In this study, we use radionucludes such as 210Pb, 7Be, 40K, 137Cs,
U and Th as tracers for material
transport in the Pan-Japan Sea
area. Research goals are deep
understanding of characteristics
and dynamics
for much higher depositions on
the Japan Sea side, and transport
of natural and anthropogenic
materials from the Asian Continent
to Japan.
