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Title: MEASURING FARM GAS EMISSIONS WITH THE BLS TECHNIQUE

Author
item FLESCH, T - UNIVERSITY OF ALBERTA
item WILSON, J - UNIVERSITYOF ALBERTA
item Harper, Lowry

Submitted to: American Society of Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/4/2004
Publication Date: 10/31/2004
Citation: Flesch, T.K., Wilson, J.D., Harper, L.A. 2004. Measuring farm gas emissions with the BLS technique [abstract]. American Society of Agronomy Meetings. Paper No. 6032. CDROM.

Interpretive Summary:

Technical Abstract: Accurate and appropriate determination of trace-gas emissions from animal feeding operations is necessary to estimate emissions inventories. This presentation demonstrates an inverse-dispersion technique to measure farm gas emissions. This technique combines a measurement of downwind concentration with a dispersion model calculation, so that one can infer a whole-farm emission rate. A backward Lagrangian stochastic dispersion model is used for this calculation, requiring as input the average wind velocity and direction, the surface roughness, and atmospheric stability. Advantages of the technique are measurement simplicity and the ability to make remote observations. However, care must be taken to avoid situations where the assumption of an idealized wind field and simplified source configuration will cause significant error. We use the technique to calculate ammonia emissions from a swine nursery farm.