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Ussler et al. 1994
Ussler, W., Chanton, J.P., Kelley, C.A. and Martens, C.S. (1994). Radon 222 tracing of soil and forest canopy trace gas exchange in an open canopy boreal forest. Journal of Geophysical Research 99: doi: 10.1029/93JD02713. issn: 0148-0227.

A set of continuous, high-resolution atmospheric radon (222Rn) concentration time series and radon soil flux measurements were acquired during the summer of 1990 at a micrometeorological tower site 13 km northwest of Schefferville, Quebec, Canada. The tower was located in a dry upland, open-canopy lichen-spruce woodland. For the period July 23 to August 1, 1990, the mean radon soil flux was 41.1¿4.8 Bq m-2 h-1. Radon surface flux from the two end-member forest floor cover types (lichen mat and bare soil) were 38.8¿5.1 and 61.8¿15.6 Bq m-2 h-1, respectively. Average total forest canopy resistances computed using a simple ''flux box'' model for radon exchange between the forest canopy and the overlying atmosphere range from 0.47¿0.24 s cm-1 to 2.65¿1.61 s cm-1 for daytime hours (0900--1700 LT) and from 3.44¿0.91 s cm-1 to 10.55¿7.16 s cm-1 for nighttime hours (2000--0600) for the period July 23 to August 6, 1990. Continuous radon profiling of canopy atmospheres is a suitable approach for determining rates of biosphere/atmosphere trace gas exchange for remote field sites where daily equipment maintenance is not possible.

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Abstract

Keywords
Atmospheric Composition and Structure, Biosphere-atmosphere interactions, Atmospheric Composition and Structure, Troposphere—composition and chemistry, Meteorology and Atmospheric Dynamics, Turbulence, Meteorology and Atmospheric Dynamics, Instruments and techniques
Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
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