Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 388561
Title Applying volumetric weather radar data for rainfall runoff modeling: the importance of error correction
Author(s) Hazenberg, P.; Leijnse, H.; Uijlenhoet, R.; Delobbe, L.; Weerts, A.H.; Reggiani, P.
Event EGU General Assembly 2009, Vienna, 2009-04-19/2009-04-24
Department(s) Hydrology and Quantitative Water Management
Publication type Abstract in scientific journal or proceedings
Publication year 2009
Abstract The inter-annual variability of Net Ecosystem Exchange of CO2 (NEE) was studied using a 13-year ecord of eddycovariance data from the Loobos forest flux site (Pinus Sylvestris) in The Netherlands. The data were processed and quality-controlled following well-established protocols. In addition, an angle-of-attack correction was performed to account for contributions from wind directions outside the calibration range of the sonic anemometer as well as a correction of the effect of surface heat exchange of the open-path gas analyzer on the CO2 flux. Annual NEE varied by more than a factor of two between individual years. Attempts were made to relate the observed NEE to several meteorological conditions, hydrological conditions, ecosystem response characteristics, and nitrogen and ozone deposition, with and without consideration of time lags. Overall, none of these factors or factor combinations consistently explained the year-to-year variations. In some cases differences between individual years could be explained by considering sub-seasonal variations, such as differences in ecosystem respiration caused by excessive drought followed by excessive precipitation in one year but not in the other or temporary reduction of carbon uptake due to storm damage. The question arises whether or not the inter-annual variability exceeds uncertainty because of uncertainty in the eddy covariance measurements and its corrections and uncertainty in ecosystem characteristics. For the Loobos site some major uncertainties will also be highlighted and compared with the interannual variability. Implications for modeling approaches will be discussed.
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