Dataset associated with "Enhancements in ammonia and methane from agricultural sources in the northeastern Colorado Front Range using observations from a small research aircraft"

Pollack, Ilana; McCabe, Megan; Caulton, Dana; Fischer, Emily V.

Dataset associated with "Enhancements in ammonia and methane from agricultural sources in the northeastern Colorado Front Range using observations from a small research aircraft"

dc.contributor.author	Pollack, Ilana
dc.contributor.author	McCabe, Megan
dc.contributor.author	Caulton, Dana
dc.contributor.author	Fischer, Emily V.
dc.coverage.spatial	The northeastern Colorado Front Range. Specifically, the geographical area bound between 40.0 °N and 41.0 °N latitude and 103.0 °W and 105.25 °W longitude.	en_US
dc.coverage.temporal	2019-11-09-2019-11-15	en_US
dc.date.accessioned	2021-10-28T20:42:34Z
dc.date.available	2021-10-28T20:42:34Z
dc.date.issued	2021
dc.description	Data collected in flight aboard the University of Wyoming King Air research aircraft. The data are from three 2-4 hour flights that occurred on November 9, November 13, and November 15 in 2019. The dataset includes timeseries of trace gases (specifically ammonia, methane, ethane, carbon monoxide, and carbon dioxide) and meteorological and position variables routinely recorded by the aircraft. The flights were conducted in the northeastern Colorado Front Range. A goal of the flights was to sample emissions from agricultural facilities in the area and separate them from other sources in the region, such oil and natural gas production.	en_US
dc.description	Department of Atmospheric Science
dc.description.abstract	Quantifying ammonia (NH3) to methane (CH4) enhancement ratios from agricultural sources is important for understanding air pollution and nitrogen deposition. The northeastern Colorado Front Range is home to concentrated animal feeding operations (CAFOs) that produce large emissions of NH3 and CH4. Isolating enhancements of NH3 and CH4 in this region due to agriculture is complicated because CAFOs are often located within regions of oil and natural gas (O&NG) extraction that are a major source of CH4 and other alkanes. Here, we utilize a small research aircraft to collect in-situ 1-Hz measurements of gas-phase NH3, CH4, and ethane (C2H6) downwind of feedlots during three flights conducted in November 2019. Enhancements in NH3 and CH4 are distinguishable up to 10 km downwind of CAFOs with the most concentrated portions of the plumes typically below 0.25 km AGL. We demonstrate that NH3 and C2H6 can be jointly used to separate near-source enhancements in CH4 from agriculture and O&NG. Molar enhancement ratios of NH3 to CH4 are quantified for individual CAFOs in this region, and they range from 0.8 - 2.7 ppbv ppbv-1. A multivariate regression model can be used to attribute the relative contribution of O&NG versus agriculture during the brief study period.	en_US
dc.description.sponsorship	This research was funded by the National Science Foundation, award #2020127.	en_US
dc.format.medium	CSV
dc.format.medium	PDF
dc.identifier.uri	https://hdl.handle.net/10217/234028
dc.identifier.uri	http://dx.doi.org/10.25675/10217/234028
dc.language	English	en_US
dc.language.iso	eng	en_US
dc.publisher	Colorado State University. Libraries	en_US
dc.relation.ispartof	Research Data
dc.relation.isreferencedby	Pollack, I. B., McCabe, M. E., Caulton, D. R., & Fischer, E. V. Enhancements in Ammonia and Methane from Agricultural Sources in the Northeastern Colorado Front Range Using Observations from a Small Research Aircraft. Environ. Sci. Technol. 2022, 56, 4, 2236–2247. https://doi.org/10.1021/acs.est.1c07382
dc.subject	ammonia	en_US
dc.subject	methane	en_US
dc.subject	enhancement ratios	en_US
dc.subject	agricultural emissions	en_US
dc.subject	concentrated animal feeding operations	en_US
dc.subject	oil and natural gas	en_US
dc.subject	northeastern Colorado Front Range	en_US
dc.subject	multivariate regression	en_US
dc.title	Dataset associated with "Enhancements in ammonia and methane from agricultural sources in the northeastern Colorado Front Range using observations from a small research aircraft"	en_US
dc.type	Dataset	en_US