Mr. Carlos A. Garcia Diaz Profile

Carlos A. Garcia Diaz

at Delaware State University

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Proceedings Article | 12 April 2021 Presentation + Paper

Quantifying methane emissions in Delaware from field-based mid-IR sensors and satellite observations

C. A. Garcia Diaz, Zakaria Juracka, Al Alexis, Mohammad Khan

Proceedings Volume 11733, 117330M (2021) https://doi.org/10.1117/12.2587901

KEYWORDS: Methane, Sensors, Satellites, Mid-IR, Agriculture, Absorption, Earth observing sensors, Climate change

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It is estimated that about 60 percent of total global methane emissions are thought to be from anthropogenic sources and about 40 percent from natural sources. Anthropogenic sources encompass a wide range of human activities, including food and energy production and waste disposal. Livestock (through fermentation processes in their digestive system that generates methane and manure management), rice cultivation, landfills, and sewage account for 55-57 percent of global anthropogenic emissions. This paper investigates methane emissions from agricultural land-use and livestock (e.g., poultry and cattle) farming practices in Delaware. Laser-based point sensing can provide a higher spatial and temporal resolution that can complement satellite observations to identify individual sources and broader geographical areas. A detailed understanding of their sources and sinks is necessary to model emissions profile accurately. This paper shows field measurements of methane using mid-IR laser-based sensors and validation with satellite data. We conducted our field deployment locally in the Delaware, Kent, and Sussex county regions focusing on high methane emitting areas. We used the TROPOspheric Monitoring Instrument (TROPOMI) methane satellite data to get a unified emissions map of methane production in Delaware by comparing our ground-based measurements with the satellite data. Furthermore, we examined the satellite data for long-term methane emissions trends to quantify 2020 average methane emissions.

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