Relevant bibliographies by topics / Greenhouse gas measurement

Academic literature on the topic 'Greenhouse gas measurement'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Greenhouse gas measurement"

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Gillenwater, Michael, and Tinus Pulles. "Welcome to Greenhouse Gas Measurement & Management." Greenhouse Gas Measurement and Management 1, no. 1 (February 2011): 3. http://dx.doi.org/10.3763/ghgmm.2010.ed01.

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Gunst, Andrew. "Carbon pollution (greenhouse gas) measurement and reporting." APPEA Journal 50, no. 1 (2010): 649. http://dx.doi.org/10.1071/aj09042.

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Carbon reporting and emissions trading in Australia—both of which, in 2007, seemed unlikely—came into effect with the implementation of mandatory data reporting from July 2008 (Australia) and January 2010 (USA); the onus lies with emitting corporations to determine whether they must report. At the time of writing it is also likely that Australia and the USA will join Europe in placing a price on carbon by 2013. The background to the Australian regulations will be explored in this paper, along with comparisons made to regulations in other jurisdictions, including the new reporting scheme in the USA. To date, much of the public discussion in these countries has centred on the financial aspects of a carbon tax or emissions trading scheme; however, significant challenges exist in identifying and quantifying the emissions that the financial community seeks to trade, and business community understanding of the details of greenhouse emissions is not strong. Case studies from the Australian oil and gas and related industries will be used to explain counter-intuitive aspects of greenhouse gas emissions and their regulation, and to illustrate challenges in emissions measurement and reporting.
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Gunst, Andrew. "Carbon pollution (greenhouse gas) measurement and reporting." Asia-Pacific Journal of Chemical Engineering 5, no. 4 (July 2010): 646–56. http://dx.doi.org/10.1002/apj.498.

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Palmer, Paul I., Simon O'Doherty, Grant Allen, Keith Bower, Hartmut Bösch, Martyn P. Chipperfield, Sarah Connors, et al. "A measurement-based verification framework for UK greenhouse gas emissions: an overview of the Greenhouse gAs Uk and Global Emissions (GAUGE) project." Atmospheric Chemistry and Physics 18, no. 16 (August 17, 2018): 11753–77. http://dx.doi.org/10.5194/acp-18-11753-2018.

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Abstract. We describe the motivation, design, and execution of the Greenhouse gAs Uk and Global Emissions (GAUGE) project. The overarching scientific objective of GAUGE was to use atmospheric data to estimate the magnitude, distribution, and uncertainty of the UK greenhouse gas (GHG, defined here as CO2, CH4, and N2O) budget, 2013–2015. To address this objective, we established a multi-year and interlinked measurement and data analysis programme, building on an established tall-tower GHG measurement network. The calibrated measurement network comprises ground-based, airborne, ship-borne, balloon-borne, and space-borne GHG sensors. Our choice of measurement technologies and measurement locations reflects the heterogeneity of UK GHG sources, which range from small point sources such as landfills to large, diffuse sources such as agriculture. Atmospheric mole fraction data collected at the tall towers and on the ships provide information on sub-continental fluxes, representing the backbone to the GAUGE network. Additional spatial and temporal details of GHG fluxes over East Anglia were inferred from data collected by a regional network. Data collected during aircraft flights were used to study the transport of GHGs on local and regional scales. We purposely integrated new sensor and platform technologies into the GAUGE network, allowing us to lay the foundations of a strengthened UK capability to verify national GHG emissions beyond the project lifetime. For example, current satellites provide sparse and seasonally uneven sampling over the UK mainly because of its geographical size and cloud cover. This situation will improve with new and future satellite instruments, e.g. measurements of CH4 from the TROPOspheric Monitoring Instrument (TROPOMI) aboard Sentinel-5P. We use global, nested, and regional atmospheric transport models and inverse methods to infer geographically resolved CO2 and CH4 fluxes. This multi-model approach allows us to study model spread in a posteriori flux estimates. These models are used to determine the relative importance of different measurements to infer the UK GHG budget. Attributing observed GHG variations to specific sources is a major challenge. Within a UK-wide spatial context we used two approaches: (1) Δ14CO2 and other relevant isotopologues (e.g. δ13CCH4) from collected air samples to quantify the contribution from fossil fuel combustion and other sources, and (2) geographical separation of individual sources, e.g. agriculture, using a high-density measurement network. Neither of these represents a definitive approach, but they will provide invaluable information about GHG source attribution when they are adopted as part of a more comprehensive, long-term national GHG measurement programme. We also conducted a number of case studies, including an instrumented landfill experiment that provided a test bed for new technologies and flux estimation methods. We anticipate that results from the GAUGE project will help inform other countries on how to use atmospheric data to quantify their nationally determined contributions to the Paris Agreement.
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Cai, Mengyang, Huiqin Mao, Cuihong Chen, Xvpeng Wei, and Tianqi Shi. "Measuring Greenhouse Gas Emissions from Point Sources with Mobile Systems." Atmosphere 13, no. 8 (August 6, 2022): 1249. http://dx.doi.org/10.3390/atmos13081249.

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The traditional least squares method for the retrieval of CO2 emissions from CO2 emission sources is affected by the nonlinear characteristics of the Gaussian plume model, which leads to the optimal estimation of CO2 emissions easily falling into local minima. In this study, ACA–IPFM (ant colony algorithm and interior point penalty function) is proposed to remedy the shortcomings of the traditional least squares method, which makes full use of the global search property of the ant colony algorithm and the local exact search capability of the interior point penalty function to make the optimal estimation of CO2 emissions closer to the global optimum. We evaluate the errors of several parameters that are most likely to affect the accuracy of the CO2 emission retrieval and analyze these errors jointly. These parameters include wind speed measurement error, wind direction measurement error, CO2 concentration measurement error, and the number of CO2 concentration measurements. When the wind speed error is less than 20%, the inverse error of CO2 concentration emission is less than 1% and the uncertainty is less than 3%, when the wind direction error is less than 55 degrees, the inverse error is less than 1% and the uncertainty is less than 3%, when the CO2 concentration measurement error is less than 10%, the inverse error is less than 1% and the uncertainty is less than 3.3%, and when the measurement quantity is higher than 60, the inverse error is less than 1% and the uncertainty is less than 3%. In addition, we simulate the concentration observations on different paths under the same conditions, and invert the CO2 emissions based on these simulated values. Through the retrieval results, we evaluate the errors caused by different paths of measurements, and have demonstrated that different paths are affected by different emission sources to different degrees, resulting in different inversion accuracies for different paths under the same conditions in the end, which can provide some reference for the actual measurement route planning of the mobile system. Combined with the characteristics of the agility of the mobile system, ACA–IPFM can extend the monitoring of CO2 emissions to a wider area.
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Berhanu, Tesfaye Ayalneh, Ece Satar, Rudiger Schanda, Peter Nyfeler, Hanspeter Moret, Dominik Brunner, Brian Oney, and Markus Leuenberger. "Measurements of greenhouse gases at Beromünster tall-tower station in Switzerland." Atmospheric Measurement Techniques 9, no. 6 (June 17, 2016): 2603–14. http://dx.doi.org/10.5194/amt-9-2603-2016.

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Abstract. In order to constrain the regional flux of greenhouse gases, an automated measurement system was built on an old radio tower at Beromünster, Switzerland. The measurement system has been running since November 2012 as part of the Swiss greenhouse gases monitoring network (CarboCount-CH), which is composed of four measurement sites across the country. The Beromünster tall tower has five sampling lines with inlets at 12.5, 44.6, 71.5, 131.6, and 212.5 m above ground level, and it is equipped with a Picarro cavity ring-down spectrometer (CRDS) analyzer (G-2401), which continuously measures CO, CO2, CH4, and H2O. Sensors for detection of wind speed and direction, air temperature, barometric pressure, and humidity have also been installed at each height level. We have observed a non-negligible temperature effect in the calibration measurements, which was found to be dependent on the type of cylinder (steel or aluminum) as well as trace gas species (strongest for CO). From a target gas of known mixing ratio that has been measured once a day, we have calculated a long-term reproducibility of 2.79 ppb, 0.05 ppm, and 0.29 ppb for CO, CO2, and CH4, respectively, over 19 months of measurements. The values obtained for CO2 and CH4 are compliant with the WMO recommendations, while the value calculated for CO is higher than the recommendation. Since the installation of an air-conditioning system recently at the measurement cabin, we have acquired better temperature stability of the measurement system, but no significant improvement was observed in the measurement precision inferred from the target gas measurements. Therefore, it seems that the observed higher variation in CO measurements is associated with the instrumental noise, compatible with the precision provided by the manufacturer.
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McGinn, S. M. "Measuring greenhouse gas emissions from point sources in agriculture." Canadian Journal of Soil Science 86, no. 3 (May 1, 2006): 355–71. http://dx.doi.org/10.4141/s05-099.

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Carbon dioxide, methane and nitrous oxide emissions from agricultural sources have a significant role in the overall enhancement of the global greenhouse gas (GHG) effect. In research, measurements of GHG emissions are made to improve upon emission factors used in national inventories, identify and promote mitigation practices, and drive policy on GHG emissions in agriculture. These measurements are fundamental to the process of better management of GHG emissions. There is a variety of measurement techniques used in GHG research depending on the measurement environment and available resources. Techniques that use chambers or micrometeorological measurements are commonly employed for calculating emissions of GHG from point sources in agriculture, such as livestock and manure-holding facilities. This review examines these techniques, their limitations, and discusses methods to quantify their accuracy and precision. Emerging techniques like the use of dispersion models provide opportunities to directly determine emissions from whole farms. A few micrometeorological techniques (integrated horizontal flux and mass difference) are ideal for point sources such as manure storage facilities. For smaller sources, chambers are still recommended. In designing GHG emission studies, employing more than one technique when measuring GHG emissions is recommended, as often differences can exist due to technique. Ideally, a controlled release of the target gas, and its recovery, should also be conducted to evaluate techniques prior to their application. Although many techniques are often sensitive enough to quantify mitigation practices, i.e., the relative change in emissions, it is more difficult to determine “ true”emission factors as required for inventory work. It follows that the precision and accuracy of the techniques must accompany their application when estimating GHG emissions. Key words: Greenhouse gas, techniques, chambers, methane, agriculture, cattle
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Karion, A., C. Sweeney, S. Wolter, T. Newberger, H. Chen, A. Andrews, J. Kofler, D. Neff, and P. Tans. "Long-term greenhouse gas measurements from aircraft." Atmospheric Measurement Techniques 6, no. 3 (March 1, 2013): 511–26. http://dx.doi.org/10.5194/amt-6-511-2013.

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Abstract. In March 2009 the NOAA/ESRL/GMD Carbon Cycle and Greenhouse Gases Group collaborated with the US Coast Guard (USCG) to establish the Alaska Coast Guard (ACG) sampling site, a unique addition to NOAA's atmospheric monitoring network. This collaboration takes advantage of USCG bi-weekly Arctic Domain Awareness (ADA) flights, conducted with Hercules C-130 aircraft from March to November each year. Flights typically last 8 h and cover a large area, traveling from Kodiak up to Barrow, Alaska, with altitude profiles near the coast and in the interior. NOAA instrumentation on each flight includes a flask sampling system, a continuous cavity ring-down spectroscopy (CRDS) carbon dioxide (CO2)/methane (CH4)/carbon monoxide (CO)/water vapor (H2O) analyzer, a continuous ozone analyzer, and an ambient temperature and humidity sensor. Air samples collected in flight are analyzed at NOAA/ESRL for the major greenhouse gases and a variety of halocarbons and hydrocarbons that influence climate, stratospheric ozone, and air quality. We describe the overall system for making accurate greenhouse gas measurements using a CRDS analyzer on an aircraft with minimal operator interaction and present an assessment of analyzer performance over a three-year period. Overall analytical uncertainty of CRDS measurements in 2011 is estimated to be 0.15 ppm, 1.4 ppb, and 5 ppb for CO2, CH4, and CO, respectively, considering short-term precision, calibration uncertainties, and water vapor correction uncertainty. The stability of the CRDS analyzer over a seven-month deployment period is better than 0.15 ppm, 2 ppb, and 4 ppb for CO2, CH4, and CO, respectively, based on differences of on-board reference tank measurements from a laboratory calibration performed prior to deployment. This stability is not affected by variation in pressure or temperature during flight. We conclude that the uncertainty reported for our measurements would not be significantly affected if the measurements were made without in-flight calibrations, provided ground calibrations and testing were performed regularly. Comparisons between in situ CRDS measurements and flask measurements are consistent with expected measurement uncertainties for CH4 and CO, but differences are larger than expected for CO2. Biases and standard deviations of comparisons with flask samples suggest that atmospheric variability, flask-to-flask variability, and possible flask sampling biases may be driving the observed flask versus in situ CO2 differences rather than the CRDS measurements.
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Kumar, Amit, Tao Yang, and M. P. Sharma. "Greenhouse gas measurement from Chinese freshwater bodies: A review." Journal of Cleaner Production 233 (October 2019): 368–78. http://dx.doi.org/10.1016/j.jclepro.2019.06.052.

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Harper, L. A., O. T. Denmead, and T. K. Flesch. "Micrometeorological techniques for measurement of enteric greenhouse gas emissions." Animal Feed Science and Technology 166-167 (June 2011): 227–39. http://dx.doi.org/10.1016/j.anifeedsci.2011.04.013.

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Dissertations / Theses on the topic "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.

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Doctor of Philosophy
Department 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.
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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.

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Tableau d'honneur de la Faculté des études supérieures et postdorales, 2015-2016
Le 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.
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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.

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While most micrometeorological measurement techniques are only suitable for windy conditions, the Nocturnal Boundary Layer Technique can be used to measure trace gas flux during calm, clear nights as the nighttime stability enables gas emitted at the ground to accumulate. The difference between two measurements over the whole depth of this layer is believed to integrate emissions from a large area representative of, in this study, an agricultural farm. A tethersonde and infrared gas analyzer attached to a blimp carrying a bag sampling system monitored atmospheric variables for each ascent during two summer field campaigns. A mini-SODAR was installed in the field to obtain the wind flowfield. Strong accumulation was observed under low level jets suggesting that this feature acts as a good lid for trace gases. An average background vertical motion different from zero seemed to have more influence on gas propagation than did intermittent turbulence. On at least one night, a density current created by the nearby St-Lawrence River was observed to influence measurements.
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Wolf, Katharine. "A PORTABLE SENSOR FOR MEASURING GAS EMISSIONS FROM DAIRY COMPOST BEDDED PACK BARNS." UKnowledge, 2017. http://uknowledge.uky.edu/bae_etds/51.

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The objective of this study was to develop a gas measurement chamber for the comparison of emissions from different dairy manure storage facilities. Compost bedded pack (CBP) barns are a loose housing system in which cows rest on an intensely managed compost pack. Sawdust is the primary material added to the system, along with manure and urine inputs from the cows, and the pack is stirred one to two times daily. Maintaining a high level of aerobic microbial activity in the pack is critical for cow health. Previous dairy emissions work has not included compost bedded pack barns; it was expected that the largely aerobic system would have a different emissions profile than other manure storage systems. A measurement chamber was developed to determine emission fluxes from the compost bedded pack barn surface. Infrared and electrochemical sensors measuring ammonia, methane, and carbon dioxide obtain headspace gas concentrations, temperature, and humidity each second. The relatively lower cost of each chamber, as compared to photoacoustic and gas chromatography systems, will allow a greater number to be deployed to more accurately represent the spatial variation within the system.
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Zengeni, 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.

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Albany thicket is prevalent in the Eastern Cape Province of South Africa. Its spread has diminished through overgrazing and heavy browsing by animals, land clearance and urban expansion. The result is highly degraded land characterized by invasion of alien species. There is a wealth of documented evidence on the high carbon sequestration ability of thicket biome, but not much has been done to assess its effect on carbon dioxide emissions from the soil. Given that the concentration of atmospheric greenhouse gases has been constantly rising since the industrial era, it is imperative to assess the influence of thicket biome as a source or sink of these gases. There is evidence of shifts in the climate in southern Africa as reflected by changes in rainfall patterns, increased temperatures, recurrent droughts and fires. As such, the historical rainfall variability in an Albany thicket region and its interaction with the temporal land use / cover changes was studied. This served to give some background information about the study area for more detailed study on C and carbon dioxide effluxes in thicket vegetation under different levels of degradation. This study thus aimed to determine the influence of thicket vegetation at various levels of degradation on soil carbon and carbon dioxide fluxes. The impact of plant photosynthetic pathway on soil C residence time and gas effluxes were analysed to elucidate on the land-use and cover patterns occurring in the area. All this was done to shed some light on the role of soil and thicket vegetation on carbon dioxide emissions and C storage in the spectrum of a shifting climate. The main area of research was Amakhala reserve in an Albany thicket in Eastern Cape Province; and it concentrated on three land cover types namely intact thicket, degraded thicket and grassland. The objectives mentioned above were achieved by assessing historical rainfall variability from 1970 to 2010 through trend and time series analysis at nine rainfall stations located at Amakhala reserve, Grahamstown, Bathurst, Port Alfred, Uitenhage and Port Elizabeth. The land use changes that have occurred in the Albany thicket region covering Amakhala reserve, Grahamstown, Bathurst and Port Alfred were also assessed for 1989, 1999 and 2009 through satellite image analysis with Idrisi Andes GIS software; then their interaction with rainfall variability were determined. To elucidate on the vegetation species composition and land use / cover changes that have occurred in the study area, plant biomass as well carbon (C) and nitrogen (N) isotope measurements were done. Plant biomass was assessed for the dominant species through use of pre-existing allometric equations that required data on plant basal diameter, canopy area, stem numbers and height. The plant carbon was then estimated through use of a conversion factor of 0.48 on above-ground biomass, while soil organic C was determined through the modified Walkely - Black method. Carbon and N isotope ratios were determined from the foliar material of three replicate samples of dominant plant species then analyzed through mass spectrometry. Soil carbon dioxide effluxes were then monitored in each of the intact thicket (IT), degraded thicket (DT) and grassland (G) over a 10 month period; by measuring the net carbon dioxide exchange rate (NCER) through the dynamic chamber method. An automated carbon dioxide exchange analyzer, coupled to a soil temperature probe and photosynthetic active radiation (PAR) sensor was used; with NCER measurements taken every 20-30 days. Soil temperature, moisture, penetration resistance and PAR readings were taken during each assay and later used to interpret the NCER. Results showed that long term variability in annual rainfall had a declining trend at Grahamstown (r = -0.59), Uitenhage and Bathurst stations (r = -0.32 at both stations), but was not significant at Amakhala, Port Alfred and Port Elizabeth stations. Most reductions in rainfall occurred in the 1980s and 1990s with the autumn, winter and summer rainfalls, the daily rainfall index and the daily rainfall subclasses of 10 mm and above showing a similar trend. The land use change detection gave a significant increase in proportion of degraded and transformed (moderately degraded) land between 1989 and 2009 with most of the increases occurring from 1989 to 1999, while farmland area decreased by 1.8 percent over the years. Thus the Albany region had over 30 percent of its land occupied by transformed vegetation, with heavy browsing and uncontrolled grazing being attributed to the destruction of pristine vegetation. Land-use change to game ranching and goat pastoralism was attributed to the reduction in farmland. Rainfall variability – land use change linkages were most significant in 1999 that recorded the least rainfall and had the lowest mean, maximum and sum of the NDVI. Grahamstown had the most significant rainfall-NDVI trends as it had the lowest NDVIs in 1999 when rainfall was lowest, the highest NDVI in 1989 when rainfall was highest and moderate NDVIs in 2009 when rainfall was moderate. Vegetation at the IT was characterized by a dense thicket with diverse growth forms of canopy trees, woody shrubs, succulent shrubs and ephemerals which mostly had the C3 type of pathway. This was in contrast with the IT soil isotopy that showed more positive C isotope ratios, indicating a switch between C3 and CAM photosynthesis in original vegetation. Most of the canopy trees had disappeared in the DT to be replaced by herbs, shrubs and grasses. As such, there was a huge difference in isotope ratios between DT plants and soils with the plants having mostly C3 metabolism while the soil showed a predominance of CAM plants in previous vegetation, indicating significant changes in land cover. The G site mostly comprised the grasses Themeda triandra and Panicum maximum and a few herbs. It maintained a dominance of C4 metabolism in both plants and soils showing very little change in species composition over the years. Because of the higher species diversity at IT, its soil organic C was quite high reaching levels of 3.4 percent (i.e. 3.4 t C / ha) in the top 10 cm then decreasing with depth (p < 0.001); but was moderate at DT (1.1-1.3 percent) and very low at G ( 0.5 percent C) (p < 0.001). In the same manner above-ground biomass was highest at IT i.e. 330 000 kg/ha; but was only 22 000 kg/ha in DT and as low as 6 700 kg/ha in G vegetation. High biomass at IT was mostly attributed to the succulent shrub Portulacaria afra and the canopy trees Euclea undulate, Rhus longispina and Schotia afra. This above-ground biomass translated to biomass C amounts of 158 000 kg/ha at IT, 10 600 kg/ha at DT and 3 200 kg/ha at G. Thus the IT had the highest while G the least and DT moderate plant and soil C sequestration ability. In all, the conversion of IT to DT led to a net loss of 147 000 Kg of biomass C / ha and 12 000kg less organic C / ha of land. Soil carbon dioxide effluxes were however variable between seasons as they were affected by differences in soil properties and seasonal weather patterns. High soil moisture levels (up to 16 percent gravimetric moisture) resulted in reduced soil penetration resistance (1 to 4 Kg/cm2) which raised effluxes at G and DT sites (up to 1.2 μmols m-2 sec-1) in winter, while low moisture (2 percent) resulted in hard dry soil (14 Kgm-2 penetration resistance) with suppressed CO2 effluxes in spring (0.2 μmols m-2 sec-1) especially in DT and G soils. Rising temperature generally caused accelerated gas emissions but only when moisture was not limiting (as was the case in IT). Thus the high summer temperatures (up to 40oC) gave lower effluxes especially in DT and G (< 1 μm-2sec-1) due to limited moisture supply (< 10 percent); while the Autumn period that had very high temperature (up to 48 oC) and good moisture (up to 16 percent) saw accelerated soil CO2 emissions (averaging 2 μmols m-2 sec-1) from all cover types. The high biomass and litter fall at IT served as ready substrate for soil respiration as long as moisture was not limiting and temperatures were favourable, while reduced cover at DT resulted in poor moisture conservation and creation of hard dry soils in spring and summer with reduced respiration. It was concluded that the DT had high CO2 effluxes in winter and reduced emissions in summer; while the opposite was true for the IT. All the cover types had minimal CO2 effluxes in spring and accelerated emissions in autumn. The grassland on the other hand was a fairly moderate source or sink of CO2 in most seasons compared with the other two covers. It was observed that an environment of good moisture and low-moderate temperatures (such as that in the winter) minimises effluxes while maintaining good plant productivity. It was concluded that thicket vegetation is a good sink of carbon that should be preserved in its natural condition to optimize its carbon sequestration potential. All three land covers served as sources or sinks of CO2 depending on soil and seasonal conditions. Thus high moisture and low penetration resistance generally increased effluxes of thicket ecosystems. The effect of increasing temperature on effluxes was only significant when moisture was not limiting. Conditions of good moisture and low-moderate temperatures gave reasonable amounts of effluxes while maintaining good plant productivity. Though the dry soil conditions significantly reduced effluxes in all land covers; they were not desirable since they decreased plant productivity and ultimately its C sequestration potential. Moreover, prolonged dry conditions only serve to exacerbate recovery of thicket plants as they increase mortality of canopy species in degraded and transformed areas in comparison with intact thicket.
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Filges, 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.

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Hoffmann, 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.

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Vardag, 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.

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Cowan, 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.

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Nitrous oxide (N2O) is a potent greenhouse gas (GHG) which is released naturally into the atmosphere as a by-product of the microbial processes of nitrification and denitrification. Agricultural activities are believed to account for up to 80% of anthropogenic N2O emissions at a global scale; however, these estimates are prone to large uncertainties due to the large temporal and spatial variability associated with flux measurements. This thesis contains five studies which aimed to improve the ability to measure and predict N2O emissions from agricultural activities. A closed loop dynamic chamber was developed using a quantum cascade laser (QCL). This method provided high precision chamber measurements of N2O flux from soils with a detection limit below 4 μg N2O-N m-2 h-1. Using the dynamic chamber method allowed for a detailed investigation of uncertainties in individual measurements including contributions from regression fitting, temperature and pressure. The lack of negative fluxes measured that were outwith the detection limits of the methodology (0.3% of all measurements) highlighted that the uptake of N2O reported in some previous literature is likely to have been the result of detection limits of measurement methods applied. Spatial variability of N2O flux was investigated at the plot, field and farm scale. Fluxes were measured from a grassland field plot before and after a tillage event. These measurements highlighted the large spatially variability present in N2O fluxes from agricultural soils. Fluxes varied by up to three orders of magnitude over distances less than 5 metres after the tillage event. A field scale experiment carried out on grazed grassland investigated relationships between soil properties and N2O flux. This study found that N2O emissions correlated strongly with available nitrogen content in the soil and that animal waste was likely responsible for the spatial variability of N2O flux observed at the field scale. A farm scale inventory of N2O emissions was carried out investigating several large point sources of N2O and emissions from the wider field coverage. The inventory estimates that nitrogen fertiliser application is the single largest N2O source from the livestock farm accounting for 49% of annual emissions.
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Müller, 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.

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Books on the topic "Greenhouse gas measurement"

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Loreti, Christopher P. An overview of greenhouse gas emissions verification issues. Arlington, VA: Pew Center on Global Climate Change, 2001.

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Agri-Food, Canada Agriculture and. Possible domestic policies to manage greenhouse gas emissions. Ottawa: Agriculture and Agri-Food Canada, 2000.

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Kankyōshō, Japan. Heisei 20-nendo onshitsu kōka gasu haishutsuryō shōrai mitōshi kentō gyōmu hōkokusho. [Tokyo]: Kabushiki Kaisha Sūri Keikaku, 2009.

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Ciborowski, Peter. Minnesota greenhouse gas inventory, 1990. [St. Paul: Air Quality Division, Minnesota Pollution Control Agency, 1995.

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Morningstar, Karen T. Carbon offsets: Examining their role in greenhouse gas reduction. New York: Nova Science Publishers, 2010.

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Kim, Brian Y. Guidebook on preparing airport greenhouse gas emissions inventories. Washington, D.C: Transportation Research Board, 2009.

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Environment, Alberta Alberta. Alberta greenhouse gas reporting program for 2003: Analysis. [Edmonton]: Alberta Environment, 2005.

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Madelene, Ostwald, ed. Carbon inventory methods: Handbook for greenhouse gas inventory, carbon mitigation and roundwood production projects. [Dordrecht?]: Springer, 2008.

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Montana. Dept. of Environmental Quality. Montana greenhouse gas emissions inventory: Estimate for 1990 : phase I report. Helena, Mont: Montana Dept. of Environmental Quality, 1997.

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Carbon offsets: Examining their role in greenhouse gas reduction. Hauppauge, N.Y: Nova Science Publishers, 2009.

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Book chapters on the topic "Greenhouse gas measurement"

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Zaman, M., K. Kleineidam, L. Bakken, J. Berendt, C. Bracken, K. Butterbach-Bahl, Z. Cai, et al. "Micrometeorological Methods for Greenhouse Gas Measurement." In Measuring Emission of Agricultural Greenhouse Gases and Developing Mitigation Options using Nuclear and Related Techniques, 141–50. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-55396-8_4.

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AbstractMicrometeorological techniques are useful if greenhouse gas (GHG) emissions from larger areas (i.e. entire fields) should be integrated. The theory and the various techniques such as flux-gradient, aerodynamic, and Bowen ratio as well as Eddy correlation methods are described and discussed. Alternative methods also used are Eddy correlation, mass balance techniques, and tracer-based methods. The analytical techniques with current state-of-the-art approaches as well as the calculation procedures are presented.
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Sánchez, Antoni, Adriana Artola, Xavier Font, Teresa Gea, Raquel Barrena, David Gabriel, Miguel Ángel Sánchez-Monedero, Asunción Roig, María Luz Cayuela, and Claudio Mondini. "Greenhouse Gas from Organic Waste Composting: Emissions and Measurement." In Environmental Chemistry for a Sustainable World, 33–70. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-11906-9_2.

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Zaman, M., K. Kleineidam, L. Bakken, J. Berendt, C. Bracken, K. Butterbach-Bahl, Z. Cai, et al. "Methodology for Measuring Greenhouse Gas Emissions from Agricultural Soils Using Non-isotopic Techniques." In Measuring Emission of Agricultural Greenhouse Gases and Developing Mitigation Options using Nuclear and Related Techniques, 11–108. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-55396-8_2.

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AbstractSeveral approaches exist for measuring greenhouse gases (GHGs), mainly CO2, N2O, and CH4, from soil surfaces. The principle methods that are used to measure GHG from agricultural sites are chamber-based techniques. Both open and closed chamber techniques are in use; however, the majority of field applications use closed chambers. The advantages and disadvantages of different chamber techniques and the principal steps of operation are described. An important part of determining the quality of the flux measurements is the storage and the transportation of the gas samples from the field to the laboratory where the analyses are carried out. Traditionally, analyses of GHGs are carried out via gas chromatographs (GCs). In recent years, optical analysers are becoming increasingly available; these are user-friendly machines and they provide a cost-effective alternative to GCs. Another technique which is still under development, but provides a potentially superior method, is Raman spectroscopy. Not only the GHGs, but also N2, can potentially be analysed if the precision of these techniques is increased in future development. An important part of this chapter deals with the analyses of the gas concentrations, the calculation of fluxes, and the required safety measures. Since non-upland agricultural lands (i.e. flooded paddy soils) are steadily increasing, a section is devoted to the specificities of GHG measurements in these ecosystems. Specialised techniques are also required for GHG measurements in aquatic systems (i.e. rivers), which are often affected by the transfer of nutrients from agricultural fields and therefore are an important indirect source of emission of GHGs. A simple, robust, and more precise methodof ammonia (NH3) emission measurement is also described.
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Larzillière, Michel, Denis Roy, Philippe Chrétien, Tommy Ringuette, and Louis Varfalvy. "Development and Use of an Experimental near Infrared Open Path Diode Laser Prototype for Continuous Measurement of CO2 and CH4 Fluxes from Boreal Hydro Reservoirs and Lakes." In Greenhouse Gas Emissions — Fluxes and Processes, 61–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/978-3-540-26643-3_4.

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Tang, Xiaojun, Yujun Li, Linjian Zhu, and Junhua Liu. "Complex Greenhouse Gas Measurement On-Line and in Situ Using FTIR Spectrometer." In Computer Science for Environmental Engineering and EcoInformatics, 214–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22694-6_30.

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Wiener, Jonathan B. "Solving the Precautionary Paradox: Policy Approaches to Improve Measurement of Greenhouse Gas Sources and Sinks." In Non-CO2 Greenhouse Gases: Why and How to Control?, 527–31. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0982-6_62.

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Kundu, Amitabh, and Lopamudra Ray Saraswati. "Impact of Greenhouse Gas Emissions and Climate Change on Human Development: Perspectives on Measurement." In Climate Change Modeling, Mitigation, and Adaptation, 160–75. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784412718.ch07.

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Ntinyari, Winnie, and Joseph P. Gweyi-Onyango. "Greenhouse Gases Emissions in Agricultural Systems and Climate Change Effects in Sub- Saharan Africa." In African Handbook of Climate Change Adaptation, 1081–105. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_43.

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AbstractClimate change has been viewed to result from anthropogenic human activities that have significantly altered the Nitrogen (N) cycle and carbon cycles, increasing the risks of global warming and pollution. A key cause of global warming is the increase in greenhouse gas emissions including methane, nitrous oxide, and carbon among others. The context of this chapter is based on a comprehensive desktop review on published scientific papers on climate change, greenhouse emissions, agricultural fertilizer use, modeling and projections of greenhouse gases emissions. Interestingly, sub-Saharan Africa (SSA) has the least emissions of the greenhouses gases accounting for only 7% of the total world’s emissions, implying that there is overall very little contribution yet it has the highest regional burden concerning climate change impacts. However, the values could be extremely higher than this due to lack of proper estimation and measurement tools in the region and therefore, caution needs to be taken early enough to avoid taking the trend currently experienced in developed nations. In SSA, agricultural production is the leading sector in emissions of N compound to the atmosphere followed by energy and transportation. The greatest challenge lies in the management of the two systems to ensure sufficiency in food production using more bioenergy hence less pollution. Integrating livestock and cropping systems is one strategy that can reduce methane emissions. Additionally, developing fertilizer use policy to improve management of fertilizer and organic manure have been potentially considered as effective in reducing the effects of agriculture activities on climate change and hence the main focus of the current chapter.
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Hadler, Markus, Beate Klösch, Stephan Schwarzinger, Markus Schweighart, Rebecca Wardana, and David Neil Bird. "Introduction." In Surveying Climate-Relevant Behavior, 1–13. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-85796-7_1.

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AbstractThis introduction offers an overview of our research approach, discusses the connection between sociology and climate research, and presents our two research aims. In substantive terms, we address the question of which behaviors are of climate relevance, who is engaging in these behaviors, in which contexts do these behaviors occur, and which individual perceptions and values are related to them. In terms of research methods, we focus on the measurement of climate-relevant behaviors using population surveys. Our goal in this regard is to develop an instrument that allows a valid estimate of an individual’s greenhouse gas (GHG) emissions with as few questions as possible.
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Biesinger, Andreas, Ruben Pesch, Mariela Cotrado, and Dirk Pietruschka. "Increased Efficiency Through Intelligent Networking of Producers and Consumers in Commercial Areas Using the Example of Robert Bosch GmbH." In iCity. Transformative Research for the Livable, Intelligent, and Sustainable City, 105–43. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92096-8_9.

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AbstractEnergy-efficient heating and cooling systems as well as intelligent systems for energy distribution are urgently required in order to be able to meet the ambitious goals of the European Union to reduce greenhouse gas emissions. The present article is intended to show that intelligent system extensions for the area of heating, cooling and electricity production for the industrial sector can lead to significant increase in efficiency. For this purpose, a simulation study for the expansion of a combined heat and power (CHP) plant with 2 MW thermal output using a 1.4 MW absorption chiller has been carried out. This shows that a heat-controlled CHP unit can significantly increase its running time. A system model was created for the initial situation and validated with existing measurement data. In the second step, this model was expanded to include the ACM module. The simulation was able to prove that in the event of a system expansion, the run time of the CHP unit can be increased by 35%. In addition to then increase of energy efficiency in the supply system, the analysis also focuses on the efficiency of the energy distribution via thermal networks in an industrial environment. The presented paper therefore also highlights the optimization potentials in the operation of thermal supply networks for industrial applications. For this purpose, a mathematical model has been developed which in addition to the components of the thermal network itself also comprises the producers and consumers. The specific construction of thermal networks for the supply of industrial properties requires adapted solutions for the simulation of such systems. Therefore, amongst other things, in the paper, solutions are shown for the modelling of direct flow local heating networks as well as for the operation of a cascade-controlled pump group.
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Conference papers on the topic "Greenhouse gas measurement"

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Zak, Bernard, Brett Bader, Ray Bambha, Hope Michelsen, Mark Boslough, and Andrew R. Jacobson. "Reduction of uncertainties in remote measurement of greenhouse gas fluxes." In 2010 IEEE Aerospace Conference. IEEE, 2010. http://dx.doi.org/10.1109/aero.2010.5447028.

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Beirne, Stephen, Breda M. Kiernan, Cormac Fay, Colum Foley, Brian Corcoran, Alan F. Smeaton, and Dermot Diamond. "Autonomous greenhouse gas measurement system for analysis of gas migration on landfill sites." In 2010 IEEE Sensors Applications Symposium (SAS). IEEE, 2010. http://dx.doi.org/10.1109/sas.2010.5439422.

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Chaoyuan Wang, Baoming Li, Zhengxiang Shi, Wei Cao, Dongmei Luan, and Guoqiang Zhang. "Measurement of Greenhouse gas Emission from Naturally Ventilated Dairy Cattle Buildings." In 2012 IX International Livestock Environment Symposium (ILES IX). St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2012. http://dx.doi.org/10.13031/2013.41626.

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Melo, S., D. Barclay, K. Strong, S. Mabury, N. Stock, and M. Toohey. "First laboratory measurement of the infrared absorption cross section of a new atmospheric greenhouse gas." In Fourier Transform Spectroscopy. Washington, D.C.: OSA, 2003. http://dx.doi.org/10.1364/fts.2003.fmd12.

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Joy Agnew, Pam Loran, Subrata Karmakar, and Claude Lague. "Greenhouse Gas and Odour Emissions from Land Application of Manure: A Review of Measurement Methods." In ASABE/CSBE North Central Intersectional Meeting. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2006. http://dx.doi.org/10.13031/2013.22379.

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Sealy, Ian Michael, and Johana Dunlop. "Greenhouse Gas Emissions Measurement and Reporting in an Oilfield Services Company: Current Practice and Industry Challenges." In SPE International Conference on Health, Safety and Environment in Oil and Gas Exploration and Production. Society of Petroleum Engineers, 2010. http://dx.doi.org/10.2118/126227-ms.

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Schäfer, Klaus, Carsten Jahn, Michael Wiwiorra, Anja Schleichardt, Stefan Emeis, Armin Raabe, Jürgen Böttcher, et al. "Application of open-path spectroscopic measurement techniques (FTIR) for the up-scaling of greenhouse gas emissions from soils." In SPIE Europe Remote Sensing, edited by Richard H. Picard, Klaus Schäfer, Adolfo Comeron, and Michiel van Weele. SPIE, 2009. http://dx.doi.org/10.1117/12.830434.

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CHENG, Dongxiang, Fanghua ZHAO, and Jing CHEN. "A Review of the Research on the Measurement Methods of Greenhouse Gas Emission Reduction for LNG Automotive Applications." In International Conference on Biological Engineering and Pharmacy 2016 (BEP 2016). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/bep-16.2017.51.

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Cheng, Jui-Hsiang. "Development of Greenhouse Gases Measurement Standards to Achieve High Metrological Qualities for Evaluation of Pollutant Efficiency." In NCSL International Workshop & Symposium. NCSL International, 2014. http://dx.doi.org/10.51843/wsproceedings.2014.010.

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The control of greenhouse gases (GHGs) emission is one of the most critical environmental challenges facing all countries worldwide. CO2, the most representative greenhouse gas, is the primary GHG emitted through human activities, and the regulation of its emission has been an international issue. However, certain non-CO2 GHGs possess global warming potentials (GWPs) as high as tens to even ten thousands times that of CO2. For example, fluorinated greenhouse gases (F-GHGs), including CF4, C2F6, C3F8, C4F8, CHF3, CH2F2, SF6, NF3 and so on, have been widely used as etching process or chamber cleaning gases in semiconductor-related industries. Due to their high GWPs, F-GHGs are the most potent and longest lasting type of anthropogenic GHGs. Therefore, it has been an international goal to reduce the emissions of F-GHGs as well as other GHGs into the atmosphere. To evaluate the effectiveness of an F-GHG abatement system, measurement standards are needed for accurate and reliable quantification of the F-GHG emissions. CMS/ITRI is developing primary reference gas mixtures (PRMs) for high GWP GHGs, such as CF4, SF6 and NF3, to achieve the highest metrological qualities in gas concentration measurement. The production of gas mixtures follows ISO 6142: 2001, and the quality system is in compliance with ISO Guide 34: 2009. These PRMs can be used as primary standards to calibrate analyzers, and can act as the source of metrological traceability when performing instrument certification or validation. They can also be applied to check the accuracy of commercial infrared spectra installed in Fourier transform infrared (FTIR) spectrometers for quantification to evaluate the destruction or removal efficiency (DRE) of F-GHG abatement equipment in electronics manufacturing.
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Kazemifar, Farzan, and Dimitrios C. Kyritsis. "Near-Critical CO2 Flow Measurement and Visualization." In ASME 2013 7th International Conference on Energy Sustainability collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/es2013-18201.

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Near-critical CO2 flow has been studied because of its potential application in carbon dioxide capture and sequestration, which is one of the proposed solutions for reducing greenhouse gas emission. Near the critical point the thermophysical properties of the fluid undergo abrupt changes that affect the flow structure and characteristics. Pressure drop across a stainless steel tube, 2 ft long with 0.084 in ID, at different inlet conditions and mass flow rates have been measured. The effects of variations of inlet conditions have been studied. The results show extreme sensitivity of pressure drop to inlet conditions especially inlet temperature in the vicinity of the critical point. Also, shadowgraphs have been acquired to study the flow structure qualitatively.
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Reports on the topic "Greenhouse gas measurement"

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Prasad, Kuldeep, Anthony Bova, James R. Whetstone, and Elena Novakovskaia. Greenhouse Gas Emissions and Dispersion : 1. Optimum Placement of Gas Inlets on a Building Rooftop for the Measurement of Greenhouse Gas Concentration. National Institute of Standards and Technology, April 2013. http://dx.doi.org/10.6028/nist.sp.1158.

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Akhavian, Reza. Automated Measurement of Heavy Equipment Greenhouse Gas Emission: The case of Road/Bridge Construction and Maintenance. Mineta Transportation Institute, December 2019. http://dx.doi.org/10.31979/mti.2019.1852.

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Liu, Zhen, Cosmin Safta, Khachik Sargsyan, Habib N. Najm, Bart Gustaaf van Bloemen Waanders, Brian W. LaFranchi, Mark D. Ivey, Paul E. Schrader, Hope A. Michelsen, and Ray P. Bambha. Greenhouse Gas Source Attribution: Measurements Modeling and Uncertainty Quantification. Office of Scientific and Technical Information (OSTI), September 2014. http://dx.doi.org/10.2172/1322290.

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Semerjian, Hratch G., and James R. Whetstone. Urban Greenhouse Gas Measurements: Urban Testbed Systems and International Cooperation Workshop Summary Report. National Institute of Standards and Technology, April 2021. http://dx.doi.org/10.6028/nist.tn.2145.

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Ray, Jaideep, Jina Lee, Sophia Lefantzi, Vineet Yadav, Anna M. Michalak, Bart Gustaaf van Bloemen Waanders, and Sean Andrew McKenna. Kalman-filtered compressive sensing for high resolution estimation of anthropogenic greenhouse gas emissions from sparse measurements. Office of Scientific and Technical Information (OSTI), September 2013. http://dx.doi.org/10.2172/1096253.

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Prasad, Kuldeep, Rodney A. Bryant, Kevin Li, Elizabeth F. Moore, Aaron Johnson, and James R. Whetstone. Greenhouse Gas Emissions and Dispersion : 2. Comparison of FDS Predictions with Gas Velocity Measurements in the Exhaust Duct of a Stationary Source. National Institute of Standards and Technology, April 2013. http://dx.doi.org/10.6028/nist.sp.1159.

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Castellano, Mike J., Abraham G. Shaviv, Raphael Linker, and Matt Liebman. Improving nitrogen availability indicators by emphasizing correlations between gross nitrogen mineralization and the quality and quantity of labile soil organic matter fractions. United States Department of Agriculture, January 2012. http://dx.doi.org/10.32747/2012.7597926.bard.

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A major goal in Israeli and U.S. agroecosystems is to maximize nitrogen availability to crops while minimizing nitrogen losses to air and water resources. This goal has presented a significant challenge to global agronomists and scientists because crops require large inputs of nitrogen (N) fertilizer to maximize yield, but N fertilizers are easily lost to surrounding ecosystems where they contribute to water pollution and greenhouse gas concentrations. Determination of the optimum N fertilizer input is complex because the amount of N produced from soil organic matter varies with time, space and management. Indicators of soil N availability may help to guide requirements for N fertilizer inputs and are increasingly viewed as indicators of soil health To address these challenges and improve N availability indicators, project 4550 “Improving nitrogen availability indicators by emphasizing correlations between gross nitrogen mineralization and the quality and quantity of labile organic matter fractions” addressed the following objectives: Link the quantity and quality of labile soil organic matter fractions to indicators of soil fertility and environmental quality including: i) laboratory potential net N mineralization ii) in situ gross N mineralization iii) in situ N accumulation on ion exchange resins iv) crop uptake of N from mineralized soil organic matter sources (non-fertilizer N), and v) soil nitrate pool size. Evaluate and compare the potential for hot water extractable organic matter (HWEOM) and particulate organic matter quantity and quality to characterize soil N dynamics in biophysically variable Israeli and U.S. agroecosystems that are managed with different N fertility sources. Ultimately, we sought to determine if nitrogen availability indicators are the same for i) gross vs. potential net N mineralization processes, ii) diverse agroecosystems (Israel vs. US) and, iii) management strategies (organic vs. inorganic N fertility sources). Nitrogen availability indicators significantly differed for gross vs. potential N mineralization processes. These results highlight that different mechanisms control each process. Although most research on N availability indicators focuses on potential net N mineralization, new research highlights that gross N mineralization may better reflect plant N availability. Results from this project identify the use of ion exchange resin (IERs) beads as a potential technical advance to improve N mineralization assays and predictors of N availability. The IERs mimic the rhizosphere by protecting mineralized N from loss and immobilization. As a result, the IERs may save time and money by providing a measurement of N mineralization that is more similar to the costly and time consuming measurement of gross N mineralization. In further search of more accurate and cost-effective predictors of N dynamics, Excitation- Emission Matrix (EEM) spectroscopy analysis of HWEOM solution has the potential to provide reliable indicators for changes in HWEOM over time. These results demonstrated that conventional methods of labile soil organic matter quantity (HWEOM) coupled with new analyses (EEM) may be used to obtain more detailed information about N dynamics. Across Israeli and US soils with organic and inorganic based N fertility sources, multiple linear regression models were developed to predict gross and potential N mineralization. The use of N availability indicators is increasing as they are incorporated into soil health assessments and agroecosystem models that guide N inputs. Results from this project suggest that some soil variables can universally predict these important ecosystem process across diverse soils, climate and agronomic management. BARD Report - Project4550 Page 2 of 249
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