UNEPs International Methane Emissions Observatory (IMEO): Bringing together policy-relevant methane emissions data

The International Methane Emissions Observatory (IMEO) was launched in 2021 at the G20 summit by the United Nations Environment Program (UNEP). UNEP’s IMEO exists to provide open, reliable, public, policy-relevant data to facilitate actions to reduce methane emissions. UNEP, through IMEO, aims to fill gaps in knowledge and refine global understanding of the location and magnitude of methane emissions across different anthropogenic sectors

Street-level methane emissions of Bucharest, Romania and the dominance of urban wastewater

Atmospheric methane (CH4) continues to increase, but there are multiple anthropogenic source categories that can be targeted for cost-effective emissions reduction. Cities emit CH4 to the atmosphere from a mixture of anthropogenic CH4 sources, which include, but are not limited to, fugitive emissions from natural gas distribution systems, wastewater treatment facilities, waste-and rainwater networks, and landfills. Therefore, to target mitigation measures, it is important to locate and quantify local urban emissions to prioritize mitigation opportunities in large cities. Using mobile measurement techniques, we located street-level CH4 leak indications, measured flux rates, and determined potential source origins (using carbon and hydrogen stable isotopic composition along with ethane: CH4 ratios) of CH4 in Bucharest, Romania. We found 969 confirmed CH4 leak indication locations, where the maximum mole fraction elevation (above background) was 38.3 ppm (mean = 0.9 ppm ± 0.1 ppm s.e.; n = 2482). Individual leak indicator fluxes, derived using a previously established empirical relation, ranged up to around 15 metric tons CH4 yr-1 (mean = 0.8 metric tons yr-1 ± 0.05, s.e.; n = 969). The total estimated city emission rate is 1832 tons CH4 yr-1 (min = 1577 t yr-1 and max = 2113 t yr-1). More than half (58%–63%) of the CH4 elevations were attributed to biogenic wastewater, mostly from venting storm grates and manholes connecting to sewer pipelines. Hydrogen isotopic composition of CH4 and ethane:methane ratios were the most useful tracers of CH4 sources, due to similarities in carbon isotope ratios between wastewater gas and natural gas. The annual city-wide CH4 emission estimate of Bucharest exceeded emissions of Hamburg, Germany by 76% and Paris, France by 90%

Ground-Based Mobile Measurements to Track Urban Methane Emissions from Natural Gas in 12 Cities across Eight Countries

To mitigate methane emission from urban natural gas distribution systems, it is crucial to understand local leak rates and occurrence rates. To explore urban methane emissions in cities outside the U.S., where significant emissions were found previously, mobile measurements were performed in 12 cities across eight countries. The surveyed cities range from medium size, like Groningen, NL, to large size, like Toronto, CA, and London, UK. Furthermore, this survey spanned across European regions from Barcelona, ES, to Bucharest, RO. The joint analysis of all data allows us to focus on general emission behavior for cities with different infrastructure and environmental conditions. We find that all cities have a spectrum of small, medium, and large methane sources in their domain. The emission rates found follow a heavy-tailed distribution, and the top 10% of emitters account for 60-80% of total emissions, which implies that strategic repair planning could help reduce emissions quickly. Furthermore, we compare our findings with inventory estimates for urban natural gas-related methane emissions from this sector in Europe. While cities with larger reported emissions were found to generally also have larger observed emissions, we find clear discrepancies between observation-based and inventory-based emission estimates for our 12 cities

High potential for CH4 emission mitigation from oil infrastructure in one of EU's major production regions

Ambitious methane (CH4) emission mitigation represents one of the most effective opportunities to slow the rate of global warming over the next decades. The oil and gas (O&G) sector is a significant source of methane emissions, with technically feasible and cost-effective emission mitigation options. Romania, a key O&G producer within the EU, with the second highest reported annual CH4 emissions from the energy sector in the year 2020 (Greenhouse Gas Inventory Data - Comparison by Category, 2022), can play an important role towards the EU's emission reduction targets. In this study, we quantify CH4 emissions from onshore oil production sites in Romania at source and facility level using a combination of ground- and drone-based measurement techniques. Measured emissions were characterized by heavily skewed distributions, with 10% of the sites accounting for more than 70% of total emissions. Integrating the results from all site-level quantifications with different approaches, we derive a central estimate of 5.4 kg h-1 per site of CH4 (3.6 %-8.4 %, 95% confidence interval) for oil production sites. This estimate represents the third highest when compared to measurementbased estimates of similar facilities from other production regions. Based on our results, we estimate a total of 120 kt CH4 yr-1 (range: 79-180 kt yr-1) from oil production sites in our studied areas in Romania. This is approximately 2.5 times higher than the reported emissions from the entire Romanian oil production sector for 2020. Based on the source-level characterization, up to three-quarters of the detected emissions from oil production sites are related to operational venting. Our results suggest that O&G production infrastructure in Romania holds a massive mitigation potential, specifically by implementing measures to capture the gas and minimize operational venting and leaks

The Administrative Unification of the Completed Romania. The Stages of the Administrative Integration of Transylvania, 1918-1925

This article presents the administrative evolution of Transylvania from the moment of its unification with Romania on December 1, 1918 until the integration of this province into the unitary administration of the Romanian state, confirmed by the administrative unification law from the 4th of June, 1925. The administrative integration of Transylvania was progressive. In the beginning, the existing administrative structures were maintained and they functioned for a while, based on the Hungarian legislation from 1886. Gradually, at the same time with the organization of the Controlling Council (“Consiliul Dirigent”) from Sibiu which temporarily led Transylvania until the 20th of April, 1920, decisions that brought the organization of the province close to the structures approved by the Romanian state administration were adopted. The administrative law from 1925 unitarily organized the entire national territory into counties, subdivisions, rural and urban communes and villages.</p

The mixed legacy of the European Neighbourhood policy: The Moroccan exception

Since the creation of the European Neighbourhood Policy, the EU has aimed to create a ring of stability outside its borders, in its eastern and southern neighbourhoods. In this challenging landscape, going from east to south, one of the few European successes in terms of neighbourhood policy has been Morocco, country which became a privileged partner of the EU. The paper assesses Morocco's successful cooperation with the EU, which cannot be separated from the developments regarding Western Sahara. The paper argues, by using a neo-realist approach, that the EU-Moroccan success story can be explained through the lens of history and the mutual search for security enhancement. Even though the Moroccan case study presents specific characteristics, a security centred approach could benefit the EU in relation to other neighbour countries