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| Home > Publications database > Detection of Entrainment Influences on Surface-Layer Measurements and Extension of Monin–Obukhov Similarity Theory |
| Home > Publications database > Detection of Entrainment Influences on Surface-Layer Measurements and Extension of Monin–Obukhov Similarity Theory |
| Journal Article | FZJ-2014-05372 |
; ; ; ;
2014
Springer Science + Business Media B.V
Dordrecht [u.a.]
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Please use a persistent id in citations: doi:10.1007/s10546-014-9920-8
Abstract: We present a method to detect influences of boundary-layer processes on surfacelayermeasurements, using statistics and spectra of surface-layer variables only.We validatedour detection method with boundary-layer measurements. Furthermore, we confirm thatMonin–Obukhov similarity functions fit well to temperature-variance data obtained at twodifferent homogeneous surfaces. However, we found that humidity variance measurementsdeviate from the universal functions above one of the two studied surfaces for days on whichentrained air reached the surface layer. These results confirm that Monin–Obukhov similaritytheory should be used with care in the analysis of surface-layer data. Finally, we proposethe use of an extra term in flux-variance relations that depends on the entrainment ratiofor humidity and on the boundary-layer height. If boundary-layer measurements are notavailable, we show how the entrainment ratio for humidity can be approximated from theskewness of the humidity distribution.
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz
; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
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