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Title: Radon 222 and tropospheric vertical transport

Abstract

Radon 222 is an inert gas whose loss is due only to radioactive decay with a half life of 3.83 days (5.51-day ''exponential'' lifetime). It is a very useful tracer of continental air because only ground level continental sources are significant. Thus it is similar in several ways to many air pollutants (e.g., NO/sub x/) (NO+NO/sub 2/), SO/sub 2/, and certain hydrocarbons. Previously published measured /sup 222/Rn profiles are analyzed here by averaging for the summer, winter, and spring-fall seasons. The analysis shows that in summer, about 55% of the /sup 222/Rn is transported above the planetary boundary layer, considerably more than during the other seasons. Similarly, in summer, about 20% rises to over 5.5 km (500 mbar). The average profiles have been used to derive vertical eddy diffusion coefficients with maximum values of 5-7 x 10/sup 5/ cm/sup 2/ s/sup -1/ in the midtroposphere and 8 x 10/sup 3/ to 5 x 10/sup 4/ cm/sup 2/ s/sup -1/ near the surface.

Authors:
; ;
Publication Date:
Research Org.:
Aeronomy Laboratory, National Oceanic and Atmospheric Administration, Boulder, Colorado
OSTI Identifier:
6134546
Resource Type:
Journal Article
Journal Name:
J. Geophys. Res.; (United States)
Additional Journal Information:
Journal Volume: 89:D5
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; RADON 222; DIFFUSION; TROPOSPHERE; RADIONUCLIDE MIGRATION; SEASONAL VARIATIONS; TRACE AMOUNTS; TURBULENCE; ALPHA DECAY RADIOISOTOPES; DAYS LIVING RADIOISOTOPES; EARTH ATMOSPHERE; ENVIRONMENTAL TRANSPORT; EVEN-EVEN NUCLEI; HEAVY NUCLEI; ISOTOPES; MASS TRANSFER; NUCLEI; RADIOISOTOPES; RADON ISOTOPES; VARIATIONS; 500300* - Environment, Atmospheric- Radioactive Materials Monitoring & Transport- (-1989)

Citation Formats

Liu, S C, McAfee, J R, and Cicerone, R J. Radon 222 and tropospheric vertical transport. United States: N. p., 1984. Web. doi:10.1029/JD089iD05p07291.
Liu, S C, McAfee, J R, & Cicerone, R J. Radon 222 and tropospheric vertical transport. United States. doi:10.1029/JD089iD05p07291.
Liu, S C, McAfee, J R, and Cicerone, R J. Mon . "Radon 222 and tropospheric vertical transport". United States. doi:10.1029/JD089iD05p07291.
@article{osti_6134546,
title = {Radon 222 and tropospheric vertical transport},
author = {Liu, S C and McAfee, J R and Cicerone, R J},
abstractNote = {Radon 222 is an inert gas whose loss is due only to radioactive decay with a half life of 3.83 days (5.51-day ''exponential'' lifetime). It is a very useful tracer of continental air because only ground level continental sources are significant. Thus it is similar in several ways to many air pollutants (e.g., NO/sub x/) (NO+NO/sub 2/), SO/sub 2/, and certain hydrocarbons. Previously published measured /sup 222/Rn profiles are analyzed here by averaging for the summer, winter, and spring-fall seasons. The analysis shows that in summer, about 55% of the /sup 222/Rn is transported above the planetary boundary layer, considerably more than during the other seasons. Similarly, in summer, about 20% rises to over 5.5 km (500 mbar). The average profiles have been used to derive vertical eddy diffusion coefficients with maximum values of 5-7 x 10/sup 5/ cm/sup 2/ s/sup -1/ in the midtroposphere and 8 x 10/sup 3/ to 5 x 10/sup 4/ cm/sup 2/ s/sup -1/ near the surface.},
doi = {10.1029/JD089iD05p07291},
journal = {J. Geophys. Res.; (United States)},
number = ,
volume = 89:D5,
place = {United States},
year = {1984},
month = {8}
}