Journal
ATMOSPHERIC MEASUREMENT TECHNIQUES
Volume 14, Issue 11, Pages 7147-7152Publisher
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/amt-14-7147-2021
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Funding
- Canada Foundation for Innovation [32860]
- Natural Sciences and Engineering Research Council of Canada [2018-05717]
- Agriculture and Agri-Food Canada (Agricultural Greenhouse Gas Program 2) [AGGP2-004]
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Two micrometeorological flux footprint models were used to calculate gas emission rate, both underestimating the actual release rate by approximately 30%, with large variability in accuracy but no statistical differences observed overall.
A field study was undertaken to investigate the accuracy of two micrometeorological flux footprint models for calculating the gas emission rate from a synthetic 10 x 10 m surface area source, based on the vertical flux of gas measured at fetches of 15 to 50 m downwind of the source. Calculations were made with an easy-to-use tool based on the Kormann-Meixner analytical model and with a more sophisticated Lagrangian stochastic dispersion model. A total of 59 testable 10 min observation periods were measured over 9 d. On average, both models underestimated the actual release rate by approximately 30 %, mostly due to large underestimates at the larger fetches. The accuracy of the model calculations had large period-to-period variability, and no statistical differences were observed between the two models in terms of overall accuracy.
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