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Comparison of one- and two-filter detectors for atmospheric 222Rn measurements under various meteorological conditions
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 416416
Author(s) Xia, Y.; Sartorius, H.; Schlosser, C.; Stoehlker, U.; Conen, F.; Zahorowski, W.
Author(s) at UniBasel Conen, Franz
Year 2010
Title Comparison of one- and two-filter detectors for atmospheric 222Rn measurements under various meteorological conditions
Journal Atmospheric measurement techniques
Volume 3
Number 3
Pages / Article-Number 723-731
Abstract

Parallel monitoring of 222Rn and its short-lived
progeny (218Po and 214Pb) were carried out from Novem-
ber 2007 to April 2008 close to the top of the Schauinsland
mountain,  partly covered with forest,  in South-West Ger-
many. Samples were aspired from the same location at 2.5 m
above ground level.  We measured 222Rn with a dual flow
loop, two-filter detector and its short-lived progeny with a
one-filter detector.   A reference sector for events, facing a
steep valley and dominated by pasture, was used to minimize
differences between 222Rn and progeny-derived 222Rn activ-
ity concentrations.  In the two major wind sectors covered
by forest to a distance between 60 m and 80 m towards the
station progeny-derived 222Rn activity concentration was on
average equal to 87% (without precipitation) and 74% (with
precipitation) of 222Rn activity concentration.   The obser-
vations show that most of the time both detector types fol-
low the same pattern. Still, there is no single disequilibrium
factor  that  could  be  used  to  exactly  transform  short-lived
progeny to 222Rn activity concentration under all meteoro-
logical conditions.

Publisher Copernicus
URL http://www.atmos-meas-tech.net/3/723/2010/amt-3-723-2010.html
edoc-URL http://edoc.unibas.ch/dok/A5840581
Full Text on edoc Available
Digital Object Identifier DOI 10.5194/amt-3-723-2010
ISI-Number WOS:000279391000015
Document type (ISI) Article
 
   

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