Seasonal variation of ²²⁸Ra/²²⁶Ra ratio in surface water from the East China Sea and the Tsushima Strait

A total of 21 surface water samples were collected on the east side of the East China Sea (ECS) (3 sites) and at the Tsushima Strait (1 site), and ²²⁶Ra and ²²⁸Ra activities were measured using low-background γ-spectrometry. The ²²⁸Ra/²²⁶Ra ratios among the samples exhibited notable seasonal variati...

Full description

Saved in:
Bibliographic Details
Published in:Journal of oceanography 2010-06, Vol.66 (3), p.425-428
Main Authors: Inoue, Mutsuo, Nakano, Yusuke, Kiyomoto, Yoko, Kofuji, Hisaki, Hamajima, Yasunori, Yamamoto, Masayoshi
Format: Article
Language:English
Subjects:
Aqueous chemistry
continental shelf water
Continental shelves
Earth and Environmental Science
Earth Sciences
Freshwater & Marine Ecology
mixing ratio
Oceanography
Radium isotope
Radium isotopes
Radium radioisotopes
Ratios
Salinity
seasonal variation
Seasonal variations
Seasons
Short Contribution
Spectrometry
Spectrum analysis
Straits
Surface water
Water analysis
Water circulation
Water sampling
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A total of 21 surface water samples were collected on the east side of the East China Sea (ECS) (3 sites) and at the Tsushima Strait (1 site), and ²²⁶Ra and ²²⁸Ra activities were measured using low-background γ-spectrometry. The ²²⁸Ra/²²⁶Ra ratios among the samples exhibited notable seasonal variation (²²⁸Ra/²²⁶Ra = 0.2-2.6) accompanying changes of salinity (31.7-34.7). Seasonal water circulation within the ECS is hypothesized to cause the change by altering the mixing ratio of ²²⁸Ra-rich continental shelf water and ²²⁸Ra-poor Kuroshio water.
ISSN:0916-8370
1573-868X
DOI:10.1007/s10872-010-0036-6