Seasonal variation for Be isotopes in the atmosphere at Tokyo and Hachijo-Island
Creators
- 1. Nihon Univ., Graduate School of Integrated Basic Sciences, Tokyo (Japan)
- 2. Nihon Univ., College of Humanities and Science, Tokyo (Japan)
- 3. Tokyo Univ., School of Engineering, Tokyo (Japan)
Description
The concentration of cosmogenic nuclides 7Be (T1/2=53.3d) and 10Be (T1/2=1.5x106y) in the atmosphere at Tokyo and Hachijo-Island were investigated during the period of 2002 to 2003. Seasonal variations of 7Be and 10Be at Tokyo and Hachijo-Island were similar to each other. The high concentration peaks were observed in April to June and October to November. The low concentrations were observed in July to August. The isotopic ratio of 10Be/7Be had a peak in April to June. Using Al concentration in the aerosols, the enrichment of 10Be concentration by re-suspended soil contamination was estimated. When a box model calculation was applied to the seasonal variation of corrected 10Be/7Be, the mean residence time in troposphere and stratosphere were 35 days and 2 years, respectively. (author)
Additional details
Publishing Information
- Journal Title
- Journal of Nuclear and Radiochemical Sciences
- Journal Volume
- 7
- Journal Issue
- suppl
- Journal Page Range
- p. 57
- ISSN
- 1345-4749
Conference
- Title
- 2006 annual meeting of the Japan Society of Nuclear and Radiochemical Sciences (JNRS); 50. symposium on radiochemistry
- Dates
- 24-27 Oct 2006
- Place
- Mito, Ibaraki (Japan); Tokai, Ibaraki (Japan)
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 38057553
- Subject category
- S54: ENVIRONMENTAL SCIENCES;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ABUNDANCE; AEROSOL MONITORING; BERYLLIUM 10; BERYLLIUM 7; BOX MODELS; EARTH ATMOSPHERE; ISOTOPE RATIO; JAPAN; PARTICLE RESUSPENSION; RADIOACTIVE AEROSOLS; SEASONAL VARIATIONS; SURFACE AIR
- Descriptors DEC
- AEROSOLS; AIR; AIR POLLUTION MONITORING; ALKALINE EARTH ISOTOPES; ASIA; BERYLLIUM ISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; COLLOIDS; DAYS LIVING RADIOISOTOPES; DEVELOPED COUNTRIES; DIMENSIONLESS NUMBERS; DISPERSIONS; ELECTRON CAPTURE RADIOISOTOPES; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; FLUIDS; GASES; ISOTOPES; LIGHT NUCLEI; MATHEMATICAL MODELS; MONITORING; NUCLEI; RADIOISOTOPES; SOLS; VARIATIONS; YEARS LIVING RADIOISOTOPES
Optional Information
- Notes
- 1 fig.