Transient excess-radon profiles in Pacific bottom water

Journal Article · Fri Feb 01 04:00:00 EDT 1974 · Earth and Planetary Science Letters

DOI:https://doi.org/10.1016/0012-821X(74)90164-2· OSTI ID:4339453

Chung, Yu-Chia

Five near-bottom excess-radon profiles have been measured at the Geosecs- I station in the northeast Pacific, at varying intervals over a period of two and a half years. These profiles vary considerably in both structure and radon concentration, indicating transient characteristics of the bottom water in the deep Pacific. Only two of the five profiles are of the quasi-exponential type (Y. Chung and H. Craig); the stationary vertical eddy diffusivities calculated from these two profiles are 129 cm²/sec in November 1971, and 22 cm²/sec obtained five months later. A single bottomradon profile was measured in the western-boundary-current region of the South Pacific at the Geosecs-III station. This profile is also of the quasi-exponential type, with a vertical diffusivity of 32 cm²/sec. Although the radon concentrations of the three quasiexponential profiles and the calculated diffusivities are quite different, the integrated excess-radon inventory in the water column, and the calculated flux of radon across the sediment--water interface, vary by only a factor of two in the two areas studied.

• Research Organization: Univ. of California, San Diego, La Jolla
• Sponsoring Organization: USDOE
• NSA Number: NSA-29-026846
• OSTI ID: 4339453
• Journal Information: Earth and Planetary Science Letters, Journal Name: Earth and Planetary Science Letters Journal Issue: 3 Vol. 21; ISSN 0012-821X
• Publisher: Elsevier
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

*PACIFIC OCEAN-- RADIONUCLIDE MIGRATION
*RADON 222-- RADIATION MONITORING
*RADON 226-- RADIATION MONITORING
*SEAWATER-- RADIONUCLIDE MIGRATION
DIFFUSION
LEVELS
N44330* --Environmental & Earth Sciences--Radioactivity Monitoring & Transport--Water
TIME DEPENDENCE