dc.identifier.uri |
http://dx.doi.org/10.15488/851 |
|
dc.identifier.uri |
http://www.repo.uni-hannover.de/handle/123456789/875 |
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dc.contributor.author |
Stawiarski, Christina
|
|
dc.contributor.author |
Träumner, Katja
|
|
dc.contributor.author |
Kottmeier, Christoph
|
|
dc.contributor.author |
Knigge, Christoph
|
|
dc.contributor.author |
Raasch, Siegfried
|
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dc.date.accessioned |
2016-12-16T09:16:39Z |
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dc.date.available |
2016-12-16T09:16:39Z |
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dc.date.issued |
2015 |
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dc.identifier.citation |
Stawiarski, C.; Träumner, K.; Kottmeier, C.; Knigge, C.; Raasch, S.: Assessment of Surface-Layer Coherent Structure Detection in Dual-Doppler Lidar Data Based on Virtual Measurements. In: Boundary-Layer Meteorology 156 (2015), Nr. 3, S. 371-393. DOI: https://doi.org/10.1007/s10546-015-0039-3 |
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dc.description.abstract |
Dual-Doppler lidar has become a useful tool to investigate the wind-field structure in two-dimensional planes. However, lidar pulse width and scan duration entail significant and complex averaging in the resulting retrieved wind-field components. The effects of these processes on the wind-field structure remain difficult to investigate with in situ measurements. Based on high resolution large-eddy simulation (LES) data for the surface layer, we performed virtual dual-Doppler lidar measurements and two-dimensional data retrievals. Applying common techniques (integral length scale computation, wavelet analysis, two-dimensional clustering of low-speed streaks) to detect and quantify the length scales of the occurring coherent structures in both the LES and the virtual lidar wind fields, we found that, (i) dual-Doppler lidar measurements overestimate the correlation length due to inherent averaging processes, (ii) the wavelet analysis of lidar data produces reliable results, provided the length scales exceed a lower threshold as a function of the lidar resolution, and (iii) the low-speed streak clusters are too small to be detected directly by the dual-Doppler lidar. Furthermore, we developed and tested a method to correct the integral scale overestimation that, in addition to the dual-Doppler lidar, only requires high-resolution wind-speed variance measurements, e.g. at a tower or energy balance station. |
eng |
dc.description.sponsorship |
DFG/RA 617/19-2 |
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dc.language.iso |
eng |
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dc.publisher |
Berlin : Kluwer Academic Publishers |
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dc.relation.ispartofseries |
Boundary-Layer Meteorology 156 (2015), Nr. 3 |
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dc.rights |
CC BY 4.0 Unported |
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dc.rights.uri |
https://creativecommons.org/licenses/by/4.0/ |
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dc.subject |
Coherent structures |
eng |
dc.subject |
Dual Doppler |
eng |
dc.subject |
Large-eddy simulation |
eng |
dc.subject |
Lidar |
eng |
dc.subject |
Doppler effect |
eng |
dc.subject |
Large eddy simulation |
eng |
dc.subject |
Wavelet analysis |
eng |
dc.subject |
Wind |
eng |
dc.subject |
Coherent structure |
eng |
dc.subject |
Correlation lengths |
eng |
dc.subject |
Dual-Doppler-lidar |
eng |
dc.subject |
In-situ measurement |
eng |
dc.subject |
Reliable results |
eng |
dc.subject |
Two dimensional plane |
eng |
dc.subject |
Virtual measurements |
eng |
dc.subject |
Optical radar |
eng |
dc.subject |
boundary layer |
eng |
dc.subject |
Doppler lidar |
eng |
dc.subject |
surface layer |
eng |
dc.subject |
wind velocity |
eng |
dc.subject.ddc |
530 | Physik
|
ger |
dc.title |
Assessment of Surface-Layer Coherent Structure Detection in Dual-Doppler Lidar Data Based on Virtual Measurements |
eng |
dc.type |
Article |
|
dc.type |
Text |
|
dc.relation.issn |
00068314 |
|
dc.relation.doi |
https://doi.org/10.1007/s10546-015-0039-3 |
|
dc.bibliographicCitation.issue |
3 |
|
dc.bibliographicCitation.volume |
156 |
|
dc.bibliographicCitation.firstPage |
371 |
|
dc.bibliographicCitation.lastPage |
393 |
|
dc.description.version |
publishedVersion |
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tib.accessRights |
frei zug�nglich |
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