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| Titel |
Quality control of CarboEurope flux data – Part 1: Coupling footprint analyses with flux data quality assessment to evaluate sites in forest ecosystems |
| VerfasserIn |
M. Göckede, T. Foken, M. Aubinet, M. Aurela, J. Banza, C. Bernhofer, J. M. Bonnefond, Y. Brunet, A. Carrara, R. Clement, E. Dellwik, J. Elbers, W. Eugster, J. Fuhrer, A. Granier, T. Grünwald, B. Heinesch, I. A. Janssens, A. Knohl, R. Koeble, T. Laurila, B. Longdoz, G. Manca, M. Marek, T. Markkanen, J. Mateus, G. Matteucci, M. Mauder, M. Migliavacca, S. Minerbi, J. Moncrieff, L. Montagnani, E. Moors, J.-M. Ourcival, D. Papale, J. Pereira, K. Pilegaard, G. Pita, S. Rambal, C. Rebmann, A. Rodrigues, E. Rotenberg, M. J. Sanz, P. Sedlak, G. Seufert, L. Siebicke, J. F. Soussana, R. Valentini, T. Vesala, H. Verbeeck, D. Yakir |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 5, no. 2 ; Nr. 5, no. 2 (2008-03-26), S.433-450 |
| Datensatznummer |
250002376
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| Publikation (Nr.) |
 copernicus.org/bg-5-433-2008.pdf |
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| Zusammenfassung |
| We applied a site evaluation approach combining Lagrangian Stochastic
footprint modeling with a quality assessment approach for eddy-covariance
data to 25 forested sites of the CarboEurope-IP network. The analysis
addresses the spatial representativeness of the flux measurements,
instrumental effects on data quality, spatial patterns in the data quality,
and the performance of the coordinate rotation method. Our findings
demonstrate that application of a footprint filter could strengthen the
CarboEurope-IP flux database, since only one third of the sites is situated
in truly homogeneous terrain. Almost half of the sites experience a
significant reduction in eddy-covariance data quality under certain
conditions, though these effects are mostly constricted to a small portion
of the dataset. Reductions in data quality of the sensible heat flux are
mostly induced by characteristics of the surrounding terrain, while the
latent heat flux is subject to instrumentation-related problems. The
Planar-Fit coordinate rotation proved to be a reliable tool for the majority
of the sites using only a single set of rotation angles. Overall, we found a
high average data quality for the CarboEurope-IP network, with good
representativeness of the measurement data for the specified target land
cover types. |
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