RE: Outdoor Rn measurements (background)

["Joe Alvarez" <jalvarez@auxier.com>]

Radon levels outdoors are generally higher in fall and early winter and 
lowest in spring.  The reason is the degree turbulent transfer.  Some 
regions have little annual variation.  Higher values are seen in winter 
when strong inversions occur, in spite of the lower release from frozen 
soil.  There are numerous references for these effects and the many 
measurements that have been performed.  Two are United Nations scientific 
Committee of the effects of Atomic radiation, Sources and Effects of 
Ionizing radiation, Report to the General Assembly with Annexes, United 
Nations, New Yourk (1977) and Environmental Radon by C. Richard Cothern and 
James E. Smith, Jr., Plenum Press, New York (1987).

Indoor radon follows the same pattern but because of closed house 
conditions.  In some climates closed house conditions occur in summer.

Joe Alvarez
Auxier & Associates
10317 Technology Dr., Suite 1
Knoxville, TN 37932
Tel: 423-675-3669
FAX: 423-675-3677

-----Original Message-----
From:	Brian Rees [SMTP:brees@lanl.gov]
Sent:	Wednesday, April 08, 1998 1:40 PM
To:	Multiple recipients of list
Subject:	Outdoor Rn measurements (background)

We see Rn levels go up in Dec/Jan each year, and have accepted this as 
fact,
 but does anyone have available data that supports this?  I have found some 
daily, and hourly data, but was hoping to find the data already summarized.

Thanks in advance

Brian Rees
brees@lanl.gov
505-667-9980