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AMT | Articles | Volume 12, issue 4
Atmos. Meas. Tech., 12, 2085–2095, 2019
https://doi.org/10.5194/amt-12-2085-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Meas. Tech., 12, 2085–2095, 2019
https://doi.org/10.5194/amt-12-2085-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 04 Apr 2019

Research article | 04 Apr 2019

Using the tracer flux ratio method with flight measurements to estimate dairy farm CH4 emissions in central California

Conner Daube et al.
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Cited articles  
Arndt, C., Leytem, A. B., Hristov, A., Zavala-Araiza, D., Cativiela, J. P., Conley, S., Daube, C., Faloona, I., and Herndon, S. C.: Case Study: Short-Term Methane Emissions from Two Dairy Farms in California Estimated by Different Measurement Techniques and USEPA Inventory Methodology, J. Dairy Sci., 101, 11461–11479, https://doi.org/10.3168/jds.2017-13881, 2018. 
CARB (California Air Resources Board): Short-Lived Climate Pollutant Reduction Strategy, March, California Air Resource Board, Sacramento, CA, available at: https://www.arb.ca.gov/cc/shortlived/meetings/03142017/final_slcp_report.pdf (last access: 1 October 2018), 2017. 
Conley, S. A., Faloona, I. C., Lenschow, D. H., Karion, A., and Sweeney, C.: A Low-Cost System for Measuring Horizontal Winds from Single-Engine Aircraft, J. Atmos. Ocean. Technol., 31, 1312–1320, https://doi.org/10.1175/JTECH-D-13-00143.1, 2014. 
Conley, S., Faloona, I., Mehrotra, S., Suard, M., Lenschow, D. H., Sweeney, C., Herndon, S., Schwietzke, S., Pétron, G., Pifer, J., Kort, E. A., and Schnell, R.: Application of Gauss's theorem to quantify localized surface emissions from airborne measurements of wind and trace gases, Atmos. Meas. Tech., 10, 3345–3358, https://doi.org/10.5194/amt-10-3345-2017, 2017. 
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This study describes aircraft measurements of methane from dairy farms in central California. A small deliberate release of a tracer gas is done on the ground and measured from the air and the ratio of methane to tracer used to quantify emissions. Farm-scale methane emissions are determined as well as the fraction of those emissions coming from animal activity versus liquid manure management. These findings were within the uncertainty of two established methods.
This study describes aircraft measurements of methane from dairy farms in central California. A...
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