Results 31 to 40 of about 45,582 (306)

Comparison of Sub-Ppm Instrument Response Suggests Higher Detection Limits Could Be Used to Quantify Methane Emissions from Oil and Gas Infrastructure

Sensors
Quantifying and controlling fugitive methane emissions from oil and gas facilities remains essential for addressing climate goals, but the costs associated with monitoring millions of production sites remain prohibitively expensive.
Stuart N. Riddick, Mercy Mbua, Ryan Brouwer, Ethan W. Emerson, Abhinav Anand, Elijah Kiplimo, Seunfunmi Ojomu, Jui-Hsiang Lo, Daniel J. Zimmerle   +8 more
doaj   +1 more source

Comparison of spectrally resolved outgoing longwave radiation between 1970 and 2003: The ν4 band of methane [PDF]

, 2005
Measurements of spectrally resolved outgoing longwave radiation recorded in 1970, 1997 and 2003 are compared to determine the change in radiative forcing over that period.
Griggs, JA, Harries, JE
core   +1 more source

Addressing Low-Cost Methane Sensor Calibration Shortcomings with Machine Learning

Atmosphere
Quantifying methane emissions is essential for meeting near-term climate goals and is typically carried out using methane concentrations measured downwind of the source.
Elijah Kiplimo, Stuart N. Riddick, Mercy Mbua, Aashish Upreti, Abhinav Anand, Daniel J. Zimmerle   +5 more
doaj   +1 more source

Avoiding methane emission rate underestimates when using the divergence method

Environmental Research Letters, 2023
Methane is a powerful greenhouse gas, and a primary target for mitigating climate change in the short-term future due to its relatively short atmospheric lifetime and greater ability to trap heat in Earth’s atmosphere compared to carbon dioxide. Top-down
Clayton Roberts, Rutger IJzermans, David Randell, Matthew Jones, Philip Jonathan, Kaisey Mandel, Bill Hirst, Oliver Shorttle   +7 more
doaj   +1 more source

Predicting enteric methane emission in lactating Holsteins based on reference methane data collected by the GreenFeed system

Animal, 2022
Methane emission is not included in the current breeding goals for dairy cattle mainly due to the expense and difficulty in obtaining sufficient data to generate accurate estimates of the relevant traits.
R. Liu, D. Hailemariam, T. Yang, F. Miglior, F. Schenkel, Z. Wang, P. Stothard, S. Zhang, G. Plastow   +8 more
doaj   +1 more source

Comparative Performance of Gaussian Plume and Backward Lagrangian Stochastic Models for Near-Field Methane Emission Estimation Using a Single Controlled Release Experiment

Atmosphere
Methane (CH4) is a major component of natural gas and a potent greenhouse gas. Increasing atmospheric methane concentrations are attributed to emissive anthropogenic activities by an average of 13 ppb per yr since 2020 and are linked to a changing global
Aashish Upreti, Kira B. Shonkwiler, Stuart N. Riddick, Daniel J. Zimmerle   +3 more
doaj   +1 more source

Livestock methane emissions in the United States [PDF]

Proceedings of the National Academy of Sciences, 2014
The recent study by Miller et al. (1) provides a comprehensive, quantitative analysis of anthropogenic methane sources in the United States using atmospheric methane observations, spatial datasets, and a high-resolution atmospheric transport model.
Hristov, Alexander N, Johnson, Kristen A, Kebreab, Ermias   +2 more
openaire   +4 more sources

High spatial and temporal resolution simulations of methane column loadings due to routine emissions and emission events in oil and gas regions [PDF]

, 2023
Total column loadings of methane measured by satellites are increasingly used to estimate methane emission rates, using inversion calculations. Forward calculations of methane column loadings, based on detailed emission inventories at fine spatial ...
Qining, Chen, Shannon, Stokes, Ling, Huang, Felipe, Cardoso-Saldaña, David, Allen   +4 more
core   +1 more source

Design, Build, and Initial Testing of a Portable Methane Measurement Platform

Sensors
The quantification of methane concentrations in air is essential for the quantification of methane emissions, which in turn is necessary to determine absolute emissions and the efficacy of emission mitigation strategies.
Stuart N. Riddick, John C. Riddick, Elijah Kiplimo, Bryan Rainwater, Mercy Mbua, Fancy Cheptonui, Kate Laughery, Ezra Levin, Daniel J. Zimmerle   +8 more
doaj   +1 more source

Greenhouse gases emission from livestock production system of India: An actual consumption approach

Indian Journal of Animal Sciences, 2016
The present study was undertaken to quantify methane emission from livestock production system in India. The computational results showed that the total methane emission from the livestock production system at 2012 population base was 12.28 million ...
A K DIXIT, P S BIRTHAL
doaj   +1 more source