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Göckede, Mathias ; Markkanen, Tiina ; Hasager, Charlotte B. ; Foken, Thomas:
Update of footprint-based approach for the characterisation of complex measurement sites.
In: Boundary-Layer Meteorology.
Bd. 118
(2006)
Heft 3
.
- S. 635-655.
ISSN 1573-1472
DOI: https://doi.org/10.1007/s10546-005-6435-3
Abstract
Horizontal heterogeneity can significantly affect the flux data quality at monitoring sites with a complex terrain structure. In heterogeneous conditions, the adoption of the eddy-covariance technique is contraindicated by the lack of horizontal homogeneity and presence of advective conditions. In addition, uncertainty concerning the sources or sinks influencing a measurement compromises the data interpretation. The consideration of the spatial context of a measurement, defined by a footprint analysis, can therefore provide an important tool for data quality assessment. This study presents an update of an existing footprint-based quality evaluation concept for flux measurement sites in complex terrain. The most significant modifications in the present version are the use of a forward Lagrangian stochastic trajectory model for the determination of the spatial context of the measurements, and the determination of effective roughness lengths with a flux aggregation model in a pre-processing step. Detailed terrain data gathered by remote sensing methods is included. This approach determines spatial structures in the quality of flux data for varying meteorological conditions. These results help to identify terrain influences affecting the quality of flux data, such as dominating obstacles in the fetch, or slopes biasing the wind field, so that the most suitable footprint regions for the collection of high-quality data sets can be identified. Additionally, the approach can be used to evaluate the performance of a coordinate rotation procedure, and to check to what extent the measured fluxes are representative for a target land use type.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | BAYCEER29794 |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Ehemalige Professoren > Professur Mikrometeorologie - Univ.-Prof. Dr. Thomas Foken Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER Fakultäten Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Ehemalige Professoren Forschungseinrichtungen Forschungseinrichtungen > Forschungszentren |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik |
| Eingestellt am: | 11 Sep 2015 06:33 |
| Letzte Änderung: | 26 Apr 2022 13:21 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/19154 |