David Risk
YOU?
Author Swipe
View article: Most landfill methane emissions Escape detection in EPA21 surface emission monitoring surveys
Most landfill methane emissions Escape detection in EPA21 surface emission monitoring surveys Open
We measured emissions from ten landfills using mobile surveys and Surface Emission Monitoring (SEM) to determine what fraction of emissions can be identified by SEM surveys. SEM is commonly used for regulatory compliance and leak detection…
View article: Optimizing Methane Emission Source Localization in Oil and Gas Facilities Using Lagrangian Stochastic Models and Gradient-Based Detection Tools
Optimizing Methane Emission Source Localization in Oil and Gas Facilities Using Lagrangian Stochastic Models and Gradient-Based Detection Tools Open
Oil and gas facilities are responsible for approximately 35 % of global emissions of methane (CH4), a potent greenhouse gas, posing significant environmental and regulatory challenges. While Continuous Emission Monitoring Systems (CEMS) ar…
View article: A controlled release experiment for investigating methane measurement performance at landfills
A controlled release experiment for investigating methane measurement performance at landfills Open
We assessed the performance of various methane measurement solutions in landfill applications. A measurement solution is defined as a system or market offering that quantifies and/or localizes emissions. Our study involved full-scale multi…
View article: Active Face Emissions: An Opportunity for Reducing Methane Emissions in Global Waste Management
Active Face Emissions: An Opportunity for Reducing Methane Emissions in Global Waste Management Open
This study used mobile surveys of ten Canadian landfills to assess how methane emissions varied across different landfill sources and operational conditions. The studied landfills included two closed landfills, four open landfills equipped…
View article: Most Landfill Methane Emissions Escape Detection in EPA21 Surface Emission Monitoring Surveys
Most Landfill Methane Emissions Escape Detection in EPA21 Surface Emission Monitoring Surveys Open
We measured emissions from ten landfills using mobile surveys and Surface Emission Monitoring (SEM) to determine what fraction of emissions that be identified by SEM surveys. Using mobile methane measurements and a back-trajectory attribut…
View article: Sociodemographic and Population Exposure to Upstream Oil and Gas Operations in Canada
Sociodemographic and Population Exposure to Upstream Oil and Gas Operations in Canada Open
Canada, as one of the largest oil and gas producer in the world, is responsible for large emissions of methane, a powerful greenhouse gas. At low levels, methane is not a direct threat to human health; however, human health is affected by …
View article: Mitigating Methane Emissions: A Comprehensive Measurement Study of Canadian Landfills
Mitigating Methane Emissions: A Comprehensive Measurement Study of Canadian Landfills Open
Canada’s waste sector contributes 23% toward national methane emission totals. Recently Canada committed to a 50% reduction in waste sector methane emissions by 2030 from 2020 levels, as part of its Global Methane Pledge action plan.…
View article: Aerial Assessment of Methane Emissions from Canadian Landfills
Aerial Assessment of Methane Emissions from Canadian Landfills Open
Canada is committed to reducing methane emissions by 50% below 2020 levels by 2030 in alignment with the Global Methane Pledge. The waste sector accounts for 23% of Canada’s methane emissions, and accurate estimations of current emis…
View article: Methane emission rate estimates of offshore oil platforms in Newfoundland and Labrador, Canada
Methane emission rate estimates of offshore oil platforms in Newfoundland and Labrador, Canada Open
Methane (CH4) measurements are needed to better understand emissions from oil and gas activities. While many CH4 measurement studies have been done in Canada, they have not yet examined the reported emission intensities of offshore product…
View article: Characterization of atmospheric methane release in the outer Mackenzie River delta from biogenic and thermogenic sources
Characterization of atmospheric methane release in the outer Mackenzie River delta from biogenic and thermogenic sources Open
The Mackenzie River delta is the second largest Arctic river delta in the world. Thin and destabilizing permafrost coupled with vast natural gas reserves at depth, high organic-content soils, and a high proportion of wetlands create a uniq…
View article: Sea–air methane flux estimates derived from marine surface observations and instantaneous atmospheric measurements in the northern Labrador Sea and Baffin Bay
Sea–air methane flux estimates derived from marine surface observations and instantaneous atmospheric measurements in the northern Labrador Sea and Baffin Bay Open
Vast amounts of methane (CH4) stored in submarine sediments are susceptible to release in a warming Arctic, further exacerbating climate change in a positive feedback. It is therefore critical to monitor CH4 over pan-regional scales to det…
View article: Methane emission rate estimate using airborne measurement at offshore oil platforms in Newfoundland and Labrador, Canada
Methane emission rate estimate using airborne measurement at offshore oil platforms in Newfoundland and Labrador, Canada Open
Methane (CH 4 ) measurements are needed to better understand emissions from oil and gas sources. While many CH 4 measurement studies have been done in Canada, they have not yet targeted offshore production from which low emission intensiti…
View article: Underestimation of reported methane emissions, and air pollutant loadings, from upstream oil and gas activities in Canada
Underestimation of reported methane emissions, and air pollutant loadings, from upstream oil and gas activities in Canada Open
Canada was an early adopter of methane regulation in the oil and gas sector, and recently announced a more ambitious goal to reduce 75% of methane emissions by 2030. New stricter methane regulations should also help reduce loading of air p…
View article: Science Communication: Deeper engagement with industry and government stakeholders through documentary film, art, and graphical newsletters
Science Communication: Deeper engagement with industry and government stakeholders through documentary film, art, and graphical newsletters Open
<p>Canada&#8217;s academic science funding system requires substantial collaboration and partnership with stakeholders in government and industry. Meaningful and robust science, whether it is applied or fundamental, often depends…
View article: A comparison of methane source localization methods in landfills across Canada using truck-based measurement, Lagrangian stochastic back trajectory modeling, and Landsat thermal images
A comparison of methane source localization methods in landfills across Canada using truck-based measurement, Lagrangian stochastic back trajectory modeling, and Landsat thermal images Open
Canada is a signatory to the Global Methane Pledge and is aiming to achieve a 75% cut in methane from 2030 levels from oil and gas production through regulatory updates and a 50% cut in waste sector emissions using new regulations. Despite…
View article: Comment on egusphere-2022-549
Comment on egusphere-2022-549 Open
Abstract. The Mackenzie River Delta is the second largest Arctic river delta in the world. Thin and destabilizing permafrost coupled with vast natural gas reserves at depth, high organic content soils, and a high proportion of wetlands cre…
View article: Characterization of atmospheric methane release in the outer Mackenzie River delta from biogenic and thermogenic sources. Point samples data used in Figure 1 and Figure 4.
Characterization of atmospheric methane release in the outer Mackenzie River delta from biogenic and thermogenic sources. Point samples data used in Figure 1 and Figure 4. Open
A .pdf file containing geolocated atmospheric CH4 and CO2 mixing ratios for the Mackenzie-Beaufort Delta region of the Northwest Territories, Canada. All CH4 and CO2 values are in parts per million by volume (ppmv). Discrete point samples …
View article: Characterization of atmospheric methane release in the outer Mackenzie River delta from biogenic and thermogenic sources. Data used in Table 1.
Characterization of atmospheric methane release in the outer Mackenzie River delta from biogenic and thermogenic sources. Data used in Table 1. Open
A .pdf file containing geolocated atmospheric CH4 and CO2 mixing ratios for the Mackenzie-Beaufort Delta region of the Northwest Territories, Canada. CH4 and CO2 values are in parts per million by volume (ppmv). All sample air was drawn fr…
View article: Characterization of atmospheric methane release in the outer Mackenzie River delta from biogenic and thermogenic sources. Point samples data used in Figure 1 and Figure 4.
Characterization of atmospheric methane release in the outer Mackenzie River delta from biogenic and thermogenic sources. Point samples data used in Figure 1 and Figure 4. Open
A .pdf file containing geolocated atmospheric CH4 and CO2 mixing ratios for the Mackenzie-Beaufort Delta region of the Northwest Territories, Canada. All CH4 and CO2 values are in parts per million by volume (ppmv). Discrete point samples …
View article: Comment on egusphere-2022-549
Comment on egusphere-2022-549 Open
Abstract. The Mackenzie River Delta is the second largest Arctic river delta in the world. Thin and destabilizing permafrost coupled with vast natural gas reserves at depth, high organic content soils, and a high proportion of wetlands cre…
View article: Comment on egusphere-2022-549
Comment on egusphere-2022-549 Open
Abstract. The Mackenzie River Delta is the second largest Arctic river delta in the world. Thin and destabilizing permafrost coupled with vast natural gas reserves at depth, high organic content soils, and a high proportion of wetlands cre…
View article: Characterization of atmospheric methane release in the outer Mackenzie River Delta from biogenic and thermogenic sources
Characterization of atmospheric methane release in the outer Mackenzie River Delta from biogenic and thermogenic sources Open
The Mackenzie River Delta is the second largest Arctic river delta in the world. Thin and destabilizing permafrost coupled with vast natural gas reserves at depth, high organic content soils, and a high proportion of wetlands create a uniq…
View article: Supplementary material to "Characterization of atmospheric methane release in the outer Mackenzie River Delta from biogenic and thermogenic sources"
Supplementary material to "Characterization of atmospheric methane release in the outer Mackenzie River Delta from biogenic and thermogenic sources" Open
Characterization of atmospheric methane release in the outer Mackenzie River Delta from biogenic and thermogenic sources -Supplemental Material.5 Table S1: Site locations and CH4 source isotopic signatures.Site Latitude Longitude Source δ …
View article: Methane flux estimates from continuous atmospheric measurements and surface-water observations in the northern Labrador Sea and Baffin Bay
Methane flux estimates from continuous atmospheric measurements and surface-water observations in the northern Labrador Sea and Baffin Bay Open
Vast amounts of methane (CH4) stored in permafrost and submarine sediments are susceptible to release in a warming Arctic, further exacerbating climate change in a positive feedback. It is therefore critical to monitor CH4 over pan-regiona…
View article: Methane inventories, but not regulatory submissions, show major variations in methane intensity for Canadian oil and gas producers
Methane inventories, but not regulatory submissions, show major variations in methane intensity for Canadian oil and gas producers Open
In carbon-intensive industries like oil and gas production, ESG (Environmental, Social, Governance) reports provide investors with information about carbon intensity performance and there is link between environmental and financial perform…
View article: Methane emissions from upstream oil and gas production in Canada are underestimated
Methane emissions from upstream oil and gas production in Canada are underestimated Open
<div>Methane emissions were measured at ~7000 sites across major oil and gas producing regions in Canada to examine regional emission trends, and to derive an inventory estimate for Canada&#8217;s upstream oil and gas sector. Emi…