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Upscaling of biochemical fluxes

The objective of this study is to upscale biogeochemical fluxes from point to catchment scale, focusing on Net Ecosystem Exchange of CO2 (NEE). We want to derive a reliable carbon balance at this scale, taking into account different land use types.

The Community Land Model (CLM) is used as land surface model. It is a sophisticated modeling approach for investigating and predicting large-scale ecosystem responses to environmental change. To account for the interaction of hydrological and biogeochemical processes, CLM represents the environment as a coupled system, including the cycling of energy, water, carbon and nitrogen. So far, CLM was primarily used on continental and global scales. Data assimilation methods (e.g. the Ensemble Kalman Filter) will be used to provide more accurate model predictions, considering model and measurement uncertainty. Carbon dioxide flux measurements from six Eddy Covariance towers (including one mobile station) and remote sensing information (LAI, photosynthetic activity) will be considered as conditioning information in the data assimilation procedure. At first, CLM-CN (4.0) will be applied and evaluated for single Eddy Covariance towers within the Rur-catchment (North Rhine-Westphalia, Germany), situated on grassland, forest and agricultural test sites of the TERENO network. Later, upscaling will be conducted to evaluate how far CLM-CN is capable to accurately determine biogeochemical fluxes for the entire Rur-catchment.

Detailed information can by found here...

Projectlead

© Forschungszentrum Jülich GmbH

IBG-3 Agrosphere

Prof. Dr. Harrie-Jan Hendricks-Franssen

Forschungszentrum Jülich GmbH
in the Helmholtz Association
Institute of Bio- and Geosciences
IBG-3 Agrosphere
Wilhelm-Johnen-Straße
52428 Jülich


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