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Title: Evidence for nearly complete decoupling of very stable nocturnal boundary layer overland
Authors: Xia, Y
Conen, F
Haszpra, L
Ferenczi, Z
Zahorowski, W
Keywords: Decoupling
Boundary layers
Radon 222
Flux density
Issue Date: 1-Jan-2011
Publisher: Springer
Citation: Xia, Y., Conen, F., Haszpra, L., Ferenczi, Z., Zahorowski, W. (2011). Evidence for nearly complete decoupling of very stable nocturnal boundary layer overland. Meteorology 138(1); 163-170. doi:10.1007/s10546-010-9548-2
Abstract: Concentrations of (222)Rn at 0.1 m and 6.5 m height above ground level and (222)Rn 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 (222)Rn 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 (222)Rn 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. © 2011, Springer.
Gov't Doc #: 3667
ISSN: 0006-8314
Appears in Collections:Journal Articles

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