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 20 of 27 for “"Process-based models"”.
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Data-adaptive reduction of process-based models
Process-based models of environmental systems typically are very complex structures. This complexity arises from the attempt to describe the manifold natural processes and intricate biological interactions of environmental systems in mathematical terms. Because of their high number of state …
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Statistical and process-based models for understanding species distributions in changing environments
… species (biotic factors), migratory or dispersal processes (site accessibility) as well as the continuing effects of past events, e.g. disturbances (site legacy). Existing approaches to predict species distributions either (i) correlate observed species occurrences with environmental variables …
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Integrating Machine Learning Into Process-Based Modeling to Predict Ammonia Losses From Stored Liquid Dairy Manure
… losses is necessary to inform decision-making processes to improve manure management, and design ammonia mitigation strategies. In 2003, the National Research Council recommended using process-based models to estimate emissions of pollutants, such as ammonia, from animal feeding operations. …
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Adaptation strategies to climate change in the Tropics: analysis of two multifactorial systems (high-altitude Andean ecosystems and Plasmodium falciparum malaria infections)
… I propose a multi-model ensemble of malaria process-based models to offer useful information that could effectively guide decision-makers in risk assessment, malaria control investments and choice of interventions. I work on the integration of short-, medium- and long-term climate predictions …
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Semi-empirical sea-level modelling
Semi-empirical sea-level models (SEMs) exploit physically motivated empirical relationships between global sea level and certain drivers, in the following global mean temperature. This model class evolved as a supplement to process-based models (Rahmstorf (2007)) which were unable to fully …
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Regenerative agriculture and soil carbon storage in the Upper Corn Belt
… management affects SOC storage, erosion processes, and microbial community structure. Factors such as topography, time since adoption of regenerative practices, climate, and soil texture significantly influenced SOC stocks and microbial community structure. Slope and historical erosion …
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Examining uncertainty in environmental DNA analyses in freshwater lotic systems
… This work highlights the need for development of process-based models when using eDNA application to infer species abundances.
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Determination of fertility rating (FR) in the 3-PG model for loblolly pine (Pinus taeda L.) plantations in the southeastern United States
… index and aboveground productivity. Geocentric models used physical and chemical properties of the A-horizon. Soil geocentric models were constructed using two modeling approaches. In the first approach, ordinary least squares methods of multiple regression were used to derive soil fertility …
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Compartmental Process-based Model for Estimating Ammonia Emission from Stored Scraped Liquid Dairy Manure
The biogeochemical processes responsible for production and emission of ammonia from stored liquid dairy manure are governed by environmental factors (e.g. manure temperature, moisture) and manure characteristics (e.g. total ammoniacal nitrogen concentration, pH). These environmental factors and …
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Social organisation, ecology and conservation of loris tardigradus tardigradus (lorisformes; primates)
… may have had two breeding seasons in that year based on time of oestrous and births, and changes in ranging patterns. Lorises have a complex social organisation. The spatial system is unimale-unifemale, and the social system, gregarious or dispersed depending on degree of spatial overlap. The …
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Modelling of Biomass Production Potential of Poplar in Short Rotation Plantations on Agricultural Lands of Saxony, Germany
… for energetic use and several empirical and process-based models were developed to predict the potential production of biomass. The current work was concentrated on modelling site productivity (potential of biomass production) of specific poplar clones planted on arable Saxon land under …
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Managing Demand Uncertainty for Perishable Products Through Omnichannel Grocery
… options are analyzed through Markov Decision Process-based models in terms of changes to expected profits, outdating events, product freshness, as well as in-store and online product availabil-</p> <p>ities. A rich selection of independent variables are reviewed throughout when applicable, …
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Modelling climate change impacts on the productivity of short rotation coppice
… have far reaching consequences on crop growth. Process-based models can help quantify these interactions and predict future productivity. Here we use ForestGrowth-SRC, a process-based model originally designed for high-forest species and parameterised for a coppice system. Climate change …
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EVALUATING THE POTENTIAL OF TEMPERATE INLAND MINERAL SOIL WETLANDS AS NATURAL CLIMATE SOLUTIONS
… (3) the sensitivity of wetland carbon turnover processes to ongoing anthropogenic climate change. Comprehensive evaluations of the NCS capacity of wetlands requires (1) suitable CO₂-equivalent (e.q.) metrics to facilitate direct comparison between CO₂ sequestration and CH₄ emission; (2) …
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Photosynthesis and transpiration in a dry-land Pinus radiata forest
… gas exchange measurements with biophysical process-based models of photosynthesis, radiation transfer, and soil water balance. Responses of photosynthesis to leaf intercellular CO₂ concentration in two-year old P. radiata seedlings were measured at a range of temperatures and leaf nitrogen …
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From ecology to the assessment of multiple ecosystem services; a case study of estuarine bivalves
… mechanism (i.e. the links between ecological processes, functions, and ES) to derive insights into the associations between multiple ES provided by marine bivalves and the implications for management. In data-scarce marine environments, conventional spatial methods for assessing ES …
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Investigating the Impact of Climate and Extreme Weather on Greenhouse Gas Emissions from Irish Soils: An Evaluation of the ECOSSE Model
… assessment. Among modelling approaches, process-based modelling allows for the highest specificity of input data. Process-based models split soil carbon into pools with different decay rates influenced by environmental (biotic and abiotic) factors and management. The Estimation of Carbon …
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Fluvial bedrock abrasion by bedload : process and form
… level, the boundary condition for hill slope processes, transmits tectonic and climatic signals throughout the landscape and transports sediments to sedimentary basins. Bedrock river networks are also responsible for the texture and relief of an unglaciated landscape, and in flexural …
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Remote sensing-based assessment of Gross Primary Production (GPP) in agricultural ecosystems
… with eddy covariance (EC) methodology, process-based modeling of carbon gain, and satellite remotely-sensed vegetation indices (VIs). The data is brought together synthetically for major crops found in agricultural landscapes of Gwangwon Province, South Korea, e.g., rice, soybean, maize, …
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Application of the hector-brick reduced complexity earth system model for probabilistic climate projection
… uncertainties. Reduced complexity climate models can be useful tools for quantifying uncertainty, given their flexibility, computational efficiency, and the ability to link these models with large-ensemble frameworks. Here, we develop and use the Hector-BRICK reduced complexity climate …
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