Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"DNDC"”.
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Impact of spatial and temporal distribution of ammonia emissions from chemical fertilizer usage on predictions of air quality in the Midwest United States
… biogeochemical Denitrification Decomposition (DNDC) model. In ISS, NH3 emissions from chemical fertilizer usage are gridded at 4 km x 4 km and 12 km x 12 km resolutions, using detailed crop maps and crop specific nitrogen loading data. Daily variations in NH3 emissions, characterized by DNDC …
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Nitrous oxide emissions under different corn field managements in the United States
… the process-based Denitrification Decomposition (DNDC) model, which is used to predict trace gas emissions from agriculture based on field and climate conditions. The DNDC model was evaluated for predicting N2O emissions from corn cropping systems in the United States by comparing published field …
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Biosphere-atmosphere exchange of ammonia from a fertilized corn canopy in Central Illinois
… closure with DeNitrification DeComposition (DNDC) model predictions of NH3 flux. A new method to address practical issues of evaluating closure was developed to account for flux footprints extending outside the measurement site and differences in measurement and model temporal resolution. …
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Global development, acoustic and emissive consequences of hydropower
… a newly developed process based model (FAQ-DNDC v1.0) was used to simulate ‘net’ CO2 emissions from a newly flooded tropical reservoir and compared to the measured results. The final study (Chapter 3) examined the influence of hydropower systems on the underwater acoustic properties of river …
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Characterization of reactive and non reactive trace gas fluxes in and above soil
… fluxes obtained from a standard model (Forest-DNDC) parameterized with soil parameters as well as daily temperature and precipitation substantially overestimated the actual field N2O fluxes and also did not describe their actual temporal and spatial variabilities. Temporal variability was …
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Comparisons of N2O and CH4 fluxes as affected by land use systems and climate in small catchments in Korea
… to have a mitigating effect on N2O emissions. DNDC (Denitrification and Decomposition) modeling results matched best with the measurement results when the maximum daily soil temperature and half of the daily precipitation was assumed to occur as dominating climate conditions underneath the …
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Global soil respiration: interaction with macroscale environmental variables and response to climate change
The response of global soil respiration (Rs) to climate change determines how long the land can continue acting as a carbon sink in the future. This dissertation research identifies how temporal and spatial variation in environmental factors affects global scale Rs modeling and predictions of …