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Hoffmann, H., Zhao, G., Asseng, S. A. U. -,, Bindi, M., Cammarano, D., Constantin, J., et al. (2016). Analysing data aggregation effects on large-scale yield simulations.. Berlin (Germany).
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Hoffmann, H., Gang, Z., Van Bussel, L. G. J., Enders, A., Specka, X., Sosa, C., et al. (2014). Sensitivity of crop models to spatial aggregation of soil and climate data..
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Haas, E., R. Kiese, Klatt, S., Hoffmann, H., Zhao, G., Ewert, F., et al. (2016). Responses of soil nitrous oxide emissions and nitrate leaching on climate, soil and management input data aggregation: a biogeochemistry model ensemble study.. Berlin (Germany).
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Haas, E., Klatt, S., Kiese, R., Santa Barbara Ruiz, I., & Kraus, D. (2014). Parameter-induced uncertainty quantification of a regional N2O and NO3 inventory using the biogeochemical model LandscapeDNDC. FACCE MACSUR Mid-term Scientific Conference, 3(S) Sassari, Italy.
Abstract: In this study we quantify regional parameter-induced model uncertainty on nitrous oxide (N2O) emissions and nitrate (NO3) leaching from arable soils of Saxony (Germany) using the biogeochemical model LandscapeDNDC. For this we calculate a regional inventory using a joint parameter distribution for key parameters describing microbial C and N turnover processes as obtained by a Bayesian calibration study. We representatively sampled 400 different parameter vectors from the discrete joint parameter distribution comprising approximately 400,000 parameter combinations and used these to calculate 400 individual realizations of the regional inventory. The spatial domain (represented by 4042 polygons) is set up with spatially explicit soil and climate information and a region-typical 3-year crop rotation consisting of winter wheat, rape- seed, and winter barley. Average N2O emission from arable soils in the state of Saxony across all 400 realizations was 1.43 ± 1.25 [kg N / ha] with a median value of 1.05 [kg N / ha]. Using the default IPCC emission factor approach (Tier 1) for direct emissions reveal a higher average N2O emission of 1.51 [kg N / ha] due to fertilizer use. In the regional uncertainty quantification the 20% likelihood range for N2O emissions is 0.79 – 1.37 [kg N / ha] (50% likelihood: 0.46 – 2.05 [kg N / ha]; 90% likelihood: 0.11 – 4.03 [kg N / ha]). Respective quantities were calculated for nitrate leaching.
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Haas, E., Klatt, S., Kiese, R., Butterbach-Bahl, K., Kraft, P., & Breuer, L. (2016). Simulation of the the landscape scale nitrogen cycling and redistribution with the coupled hydrology biogeochemistry model CMF-LandscapeDNDC.. Berlin (Germany).
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