Дисертації з теми "Greenhouse gas measurement"
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Aguilar, Gallardo Orlando Alexis. "Measurement and control of greenhouse gas emissions from beef cattle feedlots." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/15167.
Повний текст джерелаDepartment of Biological and Agricultural Engineering
Ronaldo Maghirang
Emission of greenhouse gases (GHGs), including nitrous oxide (N2O), methane (CH4), and carbon dioxide (CO2), from open beef cattle feedlots is becoming an environmental concern; however, scientific information on emissions and abatement measures for feedlots is limited. This research was conducted to quantify GHG emissions from feedlots and evaluate abatement measures for mitigating emissions. Specific objectives were to: (1) measure N2O emissions from the pens in a commercial cattle feedlot; (2) evaluate the effectiveness of surface amendments in mitigating GHG emissions from feedlot manure; (3) evaluate the effects of water application on GHG emissions from feedlot manure; and (4) compare the photo-acoustic infrared multi-gas analyzer (PIMA) and gas chromatograph (GC) in measuring concentrations of N2O and CO2 emitted from feedlot manure. Field measurements on a commercial beef cattle feedlot using static flux chambers combined with GC indicated that N2O emission fluxes varied significantly with pen surface condition. The moist/muddy surface had the largest median emission flux; the dry and compacted, dry and loose, and flooded surfaces had significantly lower median emission fluxes. Pen surface amendments (i.e., organic residues, biochar, and activated carbon) were applied on feedlot manure samples in glass containers and evaluated for their effectiveness in mitigating GHG emissions. Emission fluxes were measured with the PIMA. For dry manure, all amendments showed significant reduction in N2O and CO2 emission fluxes compared with the control (i.e., no amendment). For moist manure, biochar significantly reduced GHG emissions at days 10 and 15 after application; the other amendments had limited effects on GHG emissions. The effect of water application on GHG emissions from feedlot manure was evaluated. Manure samples (with and without water application) were placed in glass containers and analyzed for GHG emission using a PIMA. For the dry manure, GHG emissions were negligible. Application of water on the manure samples resulted in short-term peaks of GHG emissions a few minutes after water application. Comparison of the GC and PIMA showed that they were significantly correlated but differed in measured concentrations of N2O and CO2. The PIMA showed generally lower N2O concentrations and higher CO2 concentrations than the GC.
Gagnon, Samuel. "Measurement of permafrost greenhouse gas emissions through a new automated system of closed chambers." Master's thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/26293.
Повний текст джерелаLe réchauffement de l’Arctique a le potentiel d’affecter le climat global par le dégel du pergélisol engendrant des émissions accrues de gaz à effet de serre (GES). Ces émissions sont cependant difficiles à quantifier puisque les méthodes conventionnellement utilisées sont généralement onéreuses et souvent très laborieuses. À l’aide d’un nouveau système automatisé de chambres fermées développé pour cette étude, ce projet visait à mesurer les émissions de GES provenant du pergélisol dans une tourbière située à Salluit, au Nunavik. Les émissions ont été quantifiées sous différentes conditions environnementales afin de simuler le réchauffement climatique et déterminer les effets des variations spatiales sur les émissions de GES. Les résultats démontrent que le nouveau système produit des résultats comparables à ceux obtenus avec un système commercial existant. La température était le principal facteur affectant la variabilité de la ER et les plus grandes émissions de GES provenaient du site saturé en eau. Mots-clés: Pergélisol, Arctique, Changements climatiques, Toundra, Tourbière polygonale, Respiration de l’écosystème, Chambre fermée, Gaz à effet de serre, Décomposition, Réchauffement expérimental.
Warming in the Arctic has the potential to affect the global climate through permafrost thaw leading to increased greenhouse gas (GHG) emissions. However, these emissions are difficult to quantify because the methods conventionally used are often prohibitively expensive and time-consuming. With a new automated system of closed chambers developed for this study, this project aimed to measure permafrost GHG emissions in a polygonal peatland located near Salluit, Nunavik. The emissions were quantified under different environmental conditions in order to simulate climate warming and to determine the effect of spatial variability on GHG emissions. Results show that the new system yields results comparable to those obtained with an existing commercial system. Temperature was the principal factor influencing ecosystem respiration variability and the largest GHG emissions were measured on the water-saturated plot. Keywords: Permafrost, Arctic, Climate change, Tundra, Polygonal peatland, Ecosystem respiration, Closed chamber, Greenhouse gas, Decomposition, Experimental warming.
Mathieu, Nathalie. "A study of atmospheric properties and their impact on the use of the nocturnal boundary layer budget technique for trace gas measurement /." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82291.
Повний текст джерелаWolf, Katharine. "A PORTABLE SENSOR FOR MEASURING GAS EMISSIONS FROM DAIRY COMPOST BEDDED PACK BARNS." UKnowledge, 2017. http://uknowledge.uky.edu/bae_etds/51.
Повний текст джерелаZengeni, Rebecca. "Assessing soil carbon and carbon dioxide effluxes under different vegetation cover conditions in the Eastern Cape Province, South Africa." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1018676.
Повний текст джерелаFilges, Annette [Verfasser], Wolfgang [Gutachter] Weigand, and Christoph [Gutachter] Gerbig. "The IAGOS-Core Greenhouse Gas package : a CO2, CH4, CO and H2O measurement system for deployment on board commercial airliners / Annette Filges ; Gutachter: Wolfgang Weigand, Christoph Gerbig." Jena : Friedrich-Schiller-Universität Jena, 2020. http://d-nb.info/1225298393/34.
Повний текст джерелаHoffmann, Mathias [Verfasser], Michael [Akademischer Betreuer] Sommer, Jürgen [Akademischer Betreuer] Augustin, and Georg [Gutachter] Wohlfahrt. "Improving measurement and modelling approaches of the closed chamber method to better assess dynamics and drivers of carbon based greenhouse gas emissions / Mathias Hoffmann ; Gutachter: Georg Wohlfahrt ; Michael Sommer, Jürgen Augustin." Potsdam : Universität Potsdam, 2019. http://d-nb.info/1218404264/34.
Повний текст джерелаVardag, Sanam Noreen [Verfasser], and Ingeborg [Akademischer Betreuer] Levin. "Greenhouse gas measurements with the Fourier Transform Infrared analyser – Our tool to study greenhouse gas fluxes / Sanam Noreen Vardag ; Betreuer: Ingeborg Levin." Heidelberg : Universitätsbibliothek Heidelberg, 2016. http://d-nb.info/118061478X/34.
Повний текст джерелаCowan, Nicholas Jon. "Spatial variability of nitrous oxide flux measurements at the plot, field and farm scale." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/10442.
Повний текст джерелаMüller, Denise [Verfasser], Hildegard [Akademischer Betreuer] Westphal, and Justus [Akademischer Betreuer] Notholt. "Water-atmosphere greenhouse gas exchange measurements using FTIR spectrometry / Denise Müller. Betreuer: Hildegard Westphal. Gutachter: Hildegard Westphal ; Justus Notholt." Bremen : Staats- und Universitätsbibliothek Bremen, 2015. http://d-nb.info/1078720320/34.
Повний текст джерелаGisi, Michael [Verfasser], and J. [Akademischer Betreuer] Orphal. "Setup of precise camera based solar tracker systems and greenhouse gas measurements using a modified portable spectrometer / Michael Gisi. Betreuer: J. Orphal." Karlsruhe : KIT-Bibliothek, 2012. http://d-nb.info/1029141916/34.
Повний текст джерелаPawa, Diptesh. "Greehouse Gas Simulations in Munich : Investigation of Wind Averaging Techniques for analysis of column measurements (XCO2) using CFD." Thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150111.
Повний текст джерелаThieme, Christoph-Josef [Verfasser], Eckart [Akademischer Betreuer] Priesack, Eckart [Gutachter] Priesack, and Urs [Gutachter] Schmidhalter. "Measurements and modelling of energy and greenhouse gas fluxes from complex cropland ecosystems / Christoph-Josef Thieme ; Gutachter: Eckart Priesack, Urs Schmidhalter ; Betreuer: Eckart Priesack." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1185069674/34.
Повний текст джерелаCanning, Anna [Verfasser], Arne [Akademischer Betreuer] Körtzinger, and Bernhard [Gutachter] Wehrli. "Greenhouse gas observations across the Land-Ocean Aquatic Continuum: Multi-sensor applications for CO2, CH4 and O2 measurements / Anna Canning ; Gutachter: Bernhard Wehrli ; Betreuer: Arne Körtzinger." Kiel : Universitätsbibliothek Kiel, 2020. http://d-nb.info/1211649261/34.
Повний текст джерелаMeurer, Katharina H. E. [Verfasser], Hermann F. [Akademischer Betreuer] [Gutachter] Jungkunst, and C. Florian [Gutachter] Stange. "Measurements and modeling of land-use specific greenhouse gas emissions from soils in Southern Amazonia / Katharina H. E. Meurer. Betreuer: Hermann F. Jungkunst. Gutachter: Hermann F. Jungkunst ; C. Florian Stange." Koblenz, 2016. http://d-nb.info/1112554025/34.
Повний текст джерелаLin, Yin-Chun, and 林盈均. "Measurement of Energy Efficiency and the Effect of Policy Instruments for Greenhouse Gas Reduction." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/94119273480733785554.
Повний текст джерела國立清華大學
經濟學系
93
For the purpose that energy use makes lots of pollution and does change the climate, promoting energy efficiency becomes a very important strategy to reduce the greenhouse gas. Energy productivity, the most often method we use to measure energy efficiency, will change depend on real GDP could not be an appropriate measurement. Otherwise, like stochastic frontier and DEA method, energy productivity could only measure the overall efficiency but could not measure the efficiency of individual energy use. In the thesis, we set up the energy efficiency indicator both on production and cost side, and called “loss of energy use by unit.” This indicator not only could measure the efficiency of individual energy use but also could apply in firm’s comparison. In addition, loss of energy use by unit could measure all kinds of study level no matter micro or macro level. Besides, we take emission standard and carbon tax into account and discussed how these policy effect energy efficiency. Furthermore, this thesis uses OLS, 2SLS, and stochastic production frontier function (STF) to do the empirical study. We found that energy productivity estimated by STF method was closer to actual situation of energy use. Keywords: energy efficiency, emission standard, carbon tax, stochastic production frontier function
wu, yu hua, and 吳宇樺. "Performance measurement of greenhouse gas volume in financial business units- Applied data envelopment analysis." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/6xh62q.
Повний текст джерела國立臺北科技大學
能源與冷凍空調工程系
106
The assessment of a companys business performance is often the most important factor in business operations. It is hoped that the largest output will be achieved with minimal input, and the direction in which efforts to improve corporate performance should be understood.The units participating in the performance appraisal can make adjustments to the redistribution of resources to achieve the purpose of improving the competitiveness of enterprises. As global climate changes and energy supply and demand tighten, energy conservation and green energy are almost an important issue. If you consider greenhouse gas emissions when assessing performance, achieve an increase in the efficiency of business operations, and save energy and reduce carbon, and fulfill corporate social responsibility. In recent years, statistical software R has been the hot spot for reanalysing the application of various statistical problems. In this study, DEA (Data Envelopment Analysis) data envelopment analysis method was used as the method of efficiency evaluation. The greenhouse gas emissions were used as inputs, and the total working iv hours, area and average outside air temperature of the business units were output. Analyze the scale efficiency of a decision-making unit with pure technical efficiency, and find out the direction in which each unit needs improvement. This study found that in the analysis of the relative efficiency of 30 business units, 3 are relatively efficient, and 27 are relatively inefficient. In the inefficient business unit, the pure technology of 6 business units is measured by the BBC model. Efficiency = 1, two of the 27 business units that indicated overall inefficiency were caused by economies of scale.
Maina, Peter Njuguna. "Recognition, measurement and reporting for cap and trade schemes in the agricultural sector." Thesis, 2016. http://hdl.handle.net/10500/21522.
Повний текст джерелаColleges of Economic and Management Sciences
D. Phil. (Accounting Science)
Wood, Jeffrey. "Mitigating Gas Emissions from Liquid Manure Storage Systems: Management Practices, Measurements and Modeling." Thesis, 2013. http://hdl.handle.net/10214/6575.
Повний текст джерелаOntario Graduate Scholarship
Hanis, Krista L. "Eddy covariance measurements of methane flux in a subarctic fen with emphasis on spring-melt period." 2010. http://hdl.handle.net/1993/4133.
Повний текст джерелаRisk, Neil. "Comparison of Simultaneous Soil Profile N2O Concentration and Surface N2O Flux Measurements Overwinter and at Spring Thaw in an Agricultural Soil." Thesis, 2012. http://hdl.handle.net/10214/3685.
Повний текст джерела