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Evidence for Nearly Complete Decoupling of Very Stable Nocturnal Boundary Layer Overland

Xia, Y. and Conen, F. and Haszpra, L. and Ferenczi, Z. and Zahorowski, W.. (2011) Evidence for Nearly Complete Decoupling of Very Stable Nocturnal Boundary Layer Overland. Boundary-Layer Meteorology, 138 (1). pp. 163-170.

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Official URL: http://edoc.unibas.ch/45945/

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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.
Faculties and Departments:05 Faculty of Science
05 Faculty of Science > Departement Umweltwissenschaften > Geowissenschaften > Umweltgeowissenschaften (Alewell)
UniBasel Contributors:Conen, Franz and Xia, Yu
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Springer
ISSN:0006-8314
e-ISSN:1573-1472
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:16 Jan 2018 10:08
Deposited On:16 Jan 2018 10:08

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