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EBookClubs

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Book Synthesis of Policy Relevant Findings from the CalNex 2010 Field Study

Download or read book Synthesis of Policy Relevant Findings from the CalNex 2010 Field Study written by David D. Parrish and published by . This book was released on 2014 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Parameterization and Uncertainty Analysis in Modeling

Download or read book Parameterization and Uncertainty Analysis in Modeling written by Gangsheng Wang and published by . This book was released on 2010 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Modelling Greenhouse Gas Emissions in Cattle

Download or read book Modelling Greenhouse Gas Emissions in Cattle written by Aklilu W. Alemu and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical modeling in animal agriculture can be applied at various levels including at the tissue, organ, animal, farm, regional and global levels. The purposes of this research were i) to evaluate models used to estimate volatile fatty acid (VFA) and methane (CH4) production and assess their impact on regional enteric CH4 inventory, and ii) to develop a process-based, whole-farm model to estimate net farm GHG emissions. In the first study, four VFA stoichiometric models were evaluated for their prediction accuracy of rumen VFA and enteric CH4 production. Comparison of measured and model predicted values demonstrated that predictive capacity of the VFA models varied with respect to the type of VFA in rumen fluid which impacted estimated enteric CH4 production. Moving to a larger scale assessment, we examined the enteric CH4 inventory from Manitoba beef cattle (from 1990 to 2008) using two mechanistic rumen models that incorporate VFA stoichiometric models: COWPOLL and MOLLY, and two empirical models: Intergovernmental Panel on Climate Change (IPCC) Tier 2 and a nonlinear equation (Ellis). The estimated absolute enteric CH4 production varied among models (7 to 63%) indicating that estimates of GHG inventory depend on model selection. This is an important consideration if the values are to be used for management and/or policy-related decisions. Development of models at the individual farm component level (animal, soil, crop) does not accurately reflect net GHG emissions generated from the whole production system. We developed a process-based, whole-farm model (Integrated Components Model, ICM), using the existing farm component models COWPOLL, manure-DNDC and some aspects of IPCC to integrate farm components and their associated GHG emissions. Estimates of total farm GHG emissions and their relative contribution using the ICM were comparable to estimates using two other whole-farm models (Integrated Farm System Model and Holos model). Variation was observed among models both in estimating whole-farm GHG emissions and the relative contribution of the different sources in the production system. Overall, whole-farm models are required to explore management options that will mitigate GHG emissions and promote best management practices. However, for full assessment of the production system, other benefits of the system (e.g., carbon sequestration, ecosystem services), which are not part of current whole-farm models, must be considered.

Book Fifth Annual 2008 California Climate Change Conference

Download or read book Fifth Annual 2008 California Climate Change Conference written by and published by . This book was released on 2008 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Modeling Greenhouse Gas Emissions and Net Return Implications for Cow calf Producers in the Ozark Highlands

Download or read book Modeling Greenhouse Gas Emissions and Net Return Implications for Cow calf Producers in the Ozark Highlands written by Stephen Aaron Smith and published by . This book was released on 2013 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cow-calf producers in the Ozark Highlands region are under continuous pressure to improve economic efficiency. Additionally, estimating greenhouse gas (GHG) emissions from cow-calf and forage production processes may become increasingly important as policy makers seek to mitigate or reduce agriculture's role in climate change. As such, this analysis had three objectives. Objective 1: Provide a model that could be used by cow-calf producers, extension agents, and researchers to evaluate GHG and net return (NR) repercussions when modifying site characteristics, production methods, and inputs. Objective 2: Develop a user guide such that the methodology for estimating cow-calf GHG emissions and NR can be adapted to other regions and livestock / cropping enterprises based on different site characteristics, production methods, and inputs. Objective 3: Using the tool, estimate the profit-maximizing hay and pasture forage species composition, cow stocking rate, and seasonal calving distribution for three sizes of operations under four fertilization strategies. A spreadsheet-based model was developed at the University of Arkansas as part of this dissertation and an M.Sc thesis. It lends itself for extension to the Ozark Highlands eco-region by helping producers analyze changes in GHG emissions and NR that result when production methods, inputs, and site characteristics are changed. Benchmark farm operations and default parameters were provided to represent three sizes of farm operations ( Small, Medium, and Large). The reference manual, developed as part of this analysis, outlines the scientific principles and methodology utilized to estimate GHG emissions and NR. In addition to the producer and extension use, the tool allows researchers to estimate profit-maximizing inputs or production methods for specific farm parameters and scenarios. Using the profit-maximizing function of the model the optimal forage species composition, calving distribution, and stocking rate were estimated for three operation sizes (Small, Medium, and Large) and four fertilization strategies (Lime, Low, Medium, and High). For the scenarios modeled, results revealed that a January-February calving season provided the greatest NR and that matching forage species composition with calving distribution was an important factor in determining operation profitability. Additionally, result from the optimization of calving season, forage species composition, and stocking rate suggested that GHG emissions from cow-calf production can be reduced.

Book Methods for estimating greenhouse gas emissions from food systems

Download or read book Methods for estimating greenhouse gas emissions from food systems written by Karl, K., Tubiello, F. N. and published by Food & Agriculture Org.. This book was released on 2021-09-16 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper is the first in a series of ongoing and planned efforts to build on current knowledge and develop methodologies for estimating new components of food systems emissions, with a view to disseminate the information in FAOSTAT. It provides a methodology for estimating the GHG emissions associated with historic and current domestic food transport, in an effort to inform countries of the environmental impact of their food distribution systems. Our efforts respond to the call of the upcoming Food Systems Summit to characterize the role of food and agriculture to accelerate achievement of the Sustainable Development Goals. In particular, they align well with Goal 12 to ensure “sustainable consumption and production patterns’’, specifically Target 12.2, “achieve the sustainable management and efficient use of natural resources” and Indicator 12.2.1, which monitors the “material footprint, material footprint per capita, and material footprint per GDP” of different products.

Book Development of Methodologies for Calculating Greenhouse Gas Emissions from Electricity Generation for the California Climate Action Registry

Download or read book Development of Methodologies for Calculating Greenhouse Gas Emissions from Electricity Generation for the California Climate Action Registry written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The California Climate Action Registry, which will begin operation in Fall 2002, is a voluntary registry for California businesses and organizations to record annual greenhouse gas emissions. Reporting of emissions in the Registry by a participant involves documentation of both ''direct'' emissions from sources that are under the entity's control and ''indirect'' emissions controlled by others. Electricity generated by an off-site power source is considered to be an indirect emission and must be included in the entity's report. Published electricity emissions factors for the State of California vary considerably due to differences in whether utility-owned out-of-state generation, non-utility generation, and electricity imports from other states are included. This paper describes the development of three methods for estimating electricity emissions factors for calculating the combined net carbon dioxide emissions from all generating facilities that provide electricity to Californians. We fi nd that use of a statewide average electricity emissions factor could drastically under- or over-estimate an entity's emissions due to the differences in generating resources among the utility service areas and seasonal variations. In addition, differentiating between marginal and average emissions is essential to accurately estimate the carbon dioxide savings from reducing electricity use. Results of this work will be taken into consideration by the Registry when finalizing its guidance for use of electricity emissions factors in calculating an entity's greenhouse gas emissions.

Book Methods for estimating greenhouse gas emissions from food systems

Download or read book Methods for estimating greenhouse gas emissions from food systems written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2023-05-11 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper is part of a series detailing new methodologies for estimating key components of agrifood systems emissions, with a view to disseminate the information in FAOSTAT. It describes methods for estimating greenhouse gas (GHG) emissions from the agrifood system, and in particular fluorinated gases (F-gases) from refrigeration systems in the food system cold chain, from food processing to food transport, retailing and household consumption processes. Based on the proposed methodology, we build a new database of GHG from F-gases used in the agrifood system, by country and with global coverage, for the period 1990–2021.

Book Greenhouse Gas Mitigation Strategies for California Dairies

Download or read book Greenhouse Gas Mitigation Strategies for California Dairies written by California Environmental Associates and published by . This book was released on 2015 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Methods for estimating greenhouse gas emissions from food systems

Download or read book Methods for estimating greenhouse gas emissions from food systems written by Tubiello, F.N., Flammini, A., Karl, K., Obli-Laryea, G., Qiu, S.Y., Heiðarsdóttir, H., Pan, X., Conchedda, G. and published by Food & Agriculture Org.. This book was released on 2021-11-04 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper is part of a series detailing new methodologies for estimating key components of agri-food systems emissions, with a view to disseminate the information in FAOSTAT. It describes methods for estimating greenhouse gas (GHG) emissions from fossil fuel-based energy use in agri-food systems processes outside agricultural land, i.e. those associated with pre- and post-production activities – in an effort to inform countries of the environmental impacts of agri-food systems and the possible options to reduce them.

Book Journal of the Air Waste Management Association

Download or read book Journal of the Air Waste Management Association written by and published by . This book was released on 2008 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: