This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1007/s10546-014-9920-8 in citations.
Detection of Entrainment Influences on Surface-Layer Measurements and Extension of Monin–Obukhov Similarity Theory
Detection of Entrainment Influences on Surface-Layer Measurements and Extension of Monin–Obukhov Similarity Theory
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...
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Personal Name(s): | van de Boer, A. (Corresponding Author) |
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Moene, A. F. / Graf, A. / Schüttemeyer, D. / Simmer, C. | |
Contributing Institute: |
Agrosphäre; IBG-3 |
Published in: | Boundary layer meteorology, 152 (2014) 1, S. 19 - 44 |
Imprint: |
Dordrecht [u.a.]
Springer Science + Business Media B.V
2014
|
DOI: |
10.1007/s10546-014-9920-8 |
Document Type: |
Journal Article |
Research Program: |
Links between local scale and catchment scale measurements and modelling of gas exchange processes over land surfaces Terrestrial Systems: From Observation to Prediction Modelling and Monitoring Terrestrial Systems: Methods and Technologies |
Publikationsportal JuSER |
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. |