Evaluation of open- and closed-path sampling systems for the determination of emission rates of NH3 and CH4 with inverse dispersion modeling

The gas emission rates of ammonia (NH3) and methane (CH4) from an artificial source covering a surface area of 254 m2 were determined by inverse dispersion modeling (IDM) from point-sampling and line-integrated concentration measurements with closed- and open-path analyzers. Eight controlled release...

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Bibliographic Details
Published in:Atmospheric measurement techniques 2023-03, Vol.16 (5), p.1295-1309
Main Authors: Lemes, Yolanda Maria, Häni, Christoph, Kamp, Jesper Nørlem, Feilberg, Anders
Format: Article
Language:English
Subjects:
Accuracy
Ammonia
Analyzers
Climatic conditions
Controlled release
Dispersion
Distance
Emissions
Experiments
Measurement
Methane
Modelling
Physical properties
Recovery
Sampling
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Summary:The gas emission rates of ammonia (NH3) and methane (CH4) from an artificial source covering a surface area of 254 m2 were determined by inverse dispersion modeling (IDM) from point-sampling and line-integrated concentration measurements with closed- and open-path analyzers. Eight controlled release experiments were conducted with different release rates ranging from 3.8±0.21 to 17.4±0.4 mg s-1 and from 30.7±1.4 to 142.8±2.9 mg s-1 for NH3 and CH4, respectively. The distance between the source and concentration measurement positions ranged from 15 to 60 m. Our study consisted of more than 200 fluxes averaged over intervals of 10 or 15 min. The different releases cover a range of different climate conditions: cold (
ISSN:1867-1381
1867-8548
DOI:10.5194/amt-16-1295-2023