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Evidence for Nearly Complete Decoupling of Very Stable Nocturnal Boundary Layer Overland
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 777192
Author(s) Xia, Y.; Conen, F.; Haszpra, L.; Ferenczi, Z.; Zahorowski, W.
Author(s) at UniBasel Conen, Franz
Xia, Yu
Year 2011
Title Evidence for Nearly Complete Decoupling of Very Stable Nocturnal Boundary Layer Overland
Journal Boundary-Layer Meteorology
Volume 138
Number 1
Pages / Article-Number 163-170
Abstract Concentrations of 222Rn at 0.1 m and 6.5 m height above ground level and 222Rn flux density were measured during nights characterized by strong cooling, light winds and clear sky conditions in the Carpathian Basin in Hungary. A very stable boundary layer (vSBL) formed on 14 nights between 15 August and 3 September 2009. On 12 nights, an estimated 72% (s.d. 20%) of 222Rn emitted from the surface since sunset was retained within the lowest 6.5 m above the ground until sunrise the following morning. On two nights an intermittent increase in wind speed at 9.4 m height was followed by a rise in temperature at 2.0 m height, indicating a larger atmospheric motion that resulted in 222Rn at 0.1 m around sunrise being the same as around the preceding sunset. It does not seem to be rare in a large continental basin for a vSBL to be nearly completely decoupled from the atmosphere above for the entire period from sunset to sunrise.
Publisher Springer
ISSN/ISBN 0006-8314 ; 1573-1472
edoc-URL http://edoc.unibas.ch/45945/
Full Text on edoc No
Digital Object Identifier DOI 10.1007/s10546-010-9548-2
ISI-Number WOS:000286101100008
Document type (ISI) Article
 
   

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