Quality control of CarboEurope flux data - Part I: Footprint analyses to evaluate sites in forest ecosystems
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Open access
Datum
2007-11-09Typ
- Working Paper
ETH Bibliographie
yes
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Abstract
We applied a site evaluation approach combining Lagrangian Stochastic footprint modelling 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. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000006696Publikationsstatus
publishedZeitschrift / Serie
Biogeosciences DiscussionsBand
Seiten / Artikelnummer
Verlag
CopernicusOrganisationseinheit
03648 - Buchmann, Nina / Buchmann, Nina
Zugehörige Publikationen und Daten
Is previous version of: https://doi.org/10.3929/ethz-b-000014033
ETH Bibliographie
yes
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