scholarly journals Quantifying fossil fuel methane emissions using observations of atmospheric ethane and an uncertain emission ratio

2021 ◽  
Author(s):  
Alice E. Ramsden ◽  
Anita L. Ganesan ◽  
Luke M. Western ◽  
Matthew Rigby ◽  
Alistair J. Manning ◽  
...  
Keyword(s):  
Fossil Fuel ◽  
Synthetic Data ◽  
Variable Parameter ◽  
Methane Emissions ◽  
Inverse Model ◽  
Uncertainty Interval ◽  
Ratio Distribution ◽  
Emission Ratio ◽  
The Uk ◽  
The Impact

Abstract. We present a method for estimating fossil fuel methane emissions using observations of methane and ethane, accounting for uncertainty in their emission ratio. The ethane:methane emission ratio is incorporated as a variable parameter in a Bayesian model, with its own prior distribution and uncertainty. We find that using an emission ratio distribution mitigates bias from using a fixed, potentially incorrect emission ratio and that uncertainty in this ratio is propagated into posterior estimates of emissions. A synthetic data test is used to show the impact of assuming an incorrect ethane:methane emission ratio and demonstrate how our variable parameter model can better quantify overall uncertainty. We also use this method to estimate UK methane emissions from high-frequency observations of methane and ethane from the UK Deriving Emissions linked to Climate Change (DECC) network. Using the joint methane-ethane inverse model, we estimate annual mean UK methane emissions of approximately 0.27 (95 % uncertainty interval 0.26–0.29) Tg per year from fossil fuel sources and 2.06 (1.99–2.15) Tg per year from non-fossil fuel sources, during the period 2015–2019. Uncertainties in UK fossil fuel emissions estimates are reduced on average by 15 %, and up to 35 %, when incorporating ethane into the inverse model, in comparison to results from the methane-only inversion.

Quantifying methane emissions from fossil fuel sources using a Bayesian inverse model and observations of ethane with an uncertain emissions ratio

2021 ◽  
Author(s):  
Alice Ramsden ◽  
Anita Ganesan ◽  
Luke Western ◽  
Alistair Manning ◽  
Matthew Rigby ◽  
...  
Keyword(s):  
Fossil Fuel ◽  
Transport Model ◽  
Atmospheric Transport ◽  
Synthetic Data ◽  
Methane Emissions ◽  
Inverse Model ◽  
Anthropogenic Sources ◽  
Atmospheric Methane ◽  
Livestock Farming ◽  
Emission Ratio

<p>Methane is an important greenhouse gas with a range of anthropogenic sources, including livestock farming and fossil fuel production. It is important that methane emissions can be correctly attributed to their source, to aid climate change policy and emissions mitigation efforts. For source attribution, many ‘top-down’ models of atmospheric methane use spatial maps of sources from emissions inventory data coupled with an atmospheric transport model. However, this can cause difficulties if sources are co-located or if there is uncertainty in the sources’ spatial distributions.</p><p>To help with this issue and reduce overall uncertainty in estimates of methane emissions, recent methods have used observations of a secondary trace gas and its correlation with methane to infer methane emissions from a target sector. Most previous work has assumed a fixed emissions ratio between the two gases, which often does not reflect the true range of possible emission ratios. In this work, measurements of atmospheric ethane and its emissions ratio relative to methane are used to infer emissions of methane from fossil fuel sources. Instead of assuming a fixed emission ratio, our method allows for uncertainty in the emission ratio to be statistically propagated through the inverse model and incorporated into the sectoral estimates of methane emissions. We further demonstrate the inaccuracies that can result in an assessment of fossil fuel methane emissions if this uncertainty is not considered.</p><p>We present this novel method for modelling sectoral methane emissions with examples from a synthetic data experiment and give results from a case study of UK methane emissions. Methane and ethane observations from a tall tower network across the UK were used with this model to produce monthly estimates of UK fossil fuel methane emissions with improved uncertainty characterisation.</p>

scholarly journals Impacts of the Fossil Fuel Divestment Movement: Effects on Finance, Policy and Public Discourse

2018 ◽  
Vol 10 (7) ◽  
pp. 2529 ◽  
Author(s):  
Noam Bergman
Keyword(s):  
Climate Change ◽  
Public Discourse ◽  
Fossil Fuel ◽  
Grey Literature ◽  
Fiduciary Duty ◽  
Student Groups ◽  
Finance Industry ◽  
Fossil Fuel Industry ◽  
The Uk ◽  
The Impact

The fossil fuel divestment movement campaigns for removing investments from fossil fuel companies as a strategy to combat climate change. It is a bottom-up movement, largely based in university student groups, although it has rapidly spread to other institutions. Divestment has been criticised for its naiveté and hard-line stance and dismissed as having little impact on fossil fuel finance. I analyse the impact of divestment through reviewing academic and grey literature, complemented by interviews with activists and financial actors, using a theoretical framework that draws on social movement theory. While the direct impacts of divestment are small, the indirect impacts, in terms of public discourse shift, are significant. Divestment has put questions of finance and climate change on the agenda and played a part in changing discourse around the legitimacy, reputation and viability of the fossil fuel industry. This cultural impact contributed to changes in the finance industry through new demands by shareholders and investors and to changes in political discourse, such as rethinking the notion of ‘fiduciary duty.’ Finally, divestment had significant impact on its participants in terms of empowerment and played a part in the revitalisation of the environmental movement in the UK and elsewhere.

ICT development, governance quality and the environmental performance: avoidable thresholds from the lower and lower-middle-income countries

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mouna Amari ◽  
Khaireddine Mouakhar ◽  
Anis Jarboui
Keyword(s):  
Energy Consumption ◽  
Environmental Sustainability ◽  
Fossil Fuel ◽  
Methane Emissions ◽  
Middle Income ◽  
Content Type ◽  
Basic Services ◽  
The Impact ◽  
Fossil Fuel Energy ◽  
Fossil Fuel Energy Consumption

PurposeThis paper aims to study the relationship between information and communication technology (ICT) readiness, use, and intensity and environmental sustainability factors in the lower and middle lower-income countries from 2012 to 2018.Design/methodology/approachICT readiness, use and intensity are measured with the impact of ICT on access to basic services, phone penetration and Internet penetration, while CO2 emissions per capita, fossil fuel energy consumption and methane emissions are used as indicators for air pollution. To achieve this goal, a two-step generalized method of moments (GMM) estimation was performed which thresholds are computed contingent on the validity of tested hypotheses.FindingsThe results demonstrate that increasing ICT readiness, use and intensity in lower and lower-middle-income countries enhance environmental sustainability by decreasing CO2 emissions and energy consumption.Research limitations/implicationsOne of the limitations of this study is that the conclusions and policy recommendations do not take into account the specificities of each country. Indeed there are some differences in the growth pattern of ICT in the lower and middle-lower-income countries. Taken together, the authors conclude that increasing ICT has a positive net effect on CO2 and methane emissions per capita, while increasing the impact of ICT access in basic services has a net negative effect on CO2 fossil fuel energy consumption and methane emissions.Practical implicationsThe world needs immediate emissions reduction to avoid the long-term danger of climate change. Second, government authorities should give additional efforts in the more pollutant sector such as transport and industry to monitor their energy consumption.Originality/valueTo explore this issue further, the negative net effects suggest that ICT needs to be further developed beyond the determined thresholds, to attain the required negative net effect on fossil fuel energy consumption.

Supplementary material to "Quantifying fossil fuel methane emissions using observations of atmospheric ethane and an uncertain emission ratio"

2021 ◽  
Author(s):  
Alice E. Ramsden ◽  
Anita L. Ganesan ◽  
Luke M. Western ◽  
Matthew Rigby ◽  
Alistair J. Manning ◽  
...  
Keyword(s):  
Fossil Fuel ◽  
Methane Emissions ◽  
Emission Ratio ◽  
Supplementary Material

The Film World’s Cooperative Store: Institutions and Films of the 1930s and 1940s

2018 ◽  
Author(s):  
C. Claire Thomson
Keyword(s):  
World War Ii ◽  
Meat Products ◽  
Public Information ◽  
Early History ◽  
World War ◽  
International Context ◽  
German Occupation ◽  
History Of ◽  
The Uk ◽  
The Impact

This chapter traces the early history of state-sponsored informational filmmaking in Denmark, emphasising its organisation as a ‘cooperative’ of organisations and government agencies. After an account of the establishment and early development of the agency Dansk Kulturfilm in the 1930s, the chapter considers two of its earliest productions, both process films documenting the manufacture of bricks and meat products. The broader context of documentary in Denmark is fleshed out with an account of the production and reception of Poul Henningsen’s seminal film Danmark (1935), and the international context is accounted for with an overview of the development of state-supported filmmaking in the UK, Italy and Germany. Developments in the funding and output of Dansk Kulturfilm up to World War II are outlined, followed by an account of the impact of the German Occupation of Denmark on domestic informational film. The establishment of the Danish Government Film Committee or Ministeriernes Filmudvalg kick-started aprofessionalisation of state-sponsored filmmaking, and two wartime public information films are briefly analysed as examples of its early output. The chapter concludes with an account of the relations between the Danish Resistance and an emerging generation of documentarists.

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