Authors:
K. Yasuike Hokuriku University Faculty of Pharmaceutical Sciences Kanagawa-machi, Kanazawa-City 920-1181 Japan

Search for other papers by K. Yasuike in
Current site
Google Scholar
PubMed
Close
,
Y. Yamada Hokuriku University Faculty of Pharmaceutical Sciences Kanagawa-machi, Kanazawa-City 920-1181 Japan

Search for other papers by Y. Yamada in
Current site
Google Scholar
PubMed
Close
, and
K. Komura Kanazawa University Low Level Radioactivity Laboratory Tatsunokuchi-machi, Nomi-City 923-1224 Japan

Search for other papers by K. Komura in
Current site
Google Scholar
PubMed
Close
Restricted access

Abstract  

The long-term variation of 14C concentrations in atmospheric CO2 samples collected every 10 days was measured in the Ohkuwa area of Kanazawa, Ishikawa prefecture, Japan (36.3°N, 136.4°E), from April 1991 to December 2000. The 14C concentration decreased gradually by about 5‰ each year from 1991 to 2000, with a pronounced seasonal cycle which began to increase from spring and reached the maximum in late July or early August, followed by a decrease to the minimum from December to February. The appearance of large seasonal cycles and the extreme decrease of 14C concentration in winter seemed to be caused mainly by the air containing a large amount of 14C-free fossil fuel CO2 transported across the Sea of Japan from the Asian continent, not by the influence of local fossil fuel consumption.

  • Collapse
  • Expand

To see the editorial board, please visit the website of Springer Nature.

Manuscript Submission: HERE

For subscription options, please visit the website of Springer Nature.

Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)