Atmospheric Tomography: A Bayesian inversion technique for determining the rate and location of fugitive emissions  


Authors / CoAuthors

Humphries, R. | Jenkins, C. | Leuning, R. | Zegelin, S. | Griffith, D. | Caldow, C. | Berko, H. | Feitz, A.J.

Abstract

A Bayesian inversion technique to determine the location and strength of trace gas emissions from a point source in open air is presented. It was tested using atmospheric measurements of nitrous oxide (N2O) and carbon dioxide (CO2) released at known rates from a source located within an array of eight evenly spaced sampling points on a 20 m radius circle. The analysis requires knowledge of concentration enhancement downwind of the source and the normalized, three-dimensional distribution (shape) of concentration in the dispersion plume. The influence of varying background concentrations of ~1% for N2O and ~10% for CO2 was removed by subtracting upwind concentrations from those downwind of the source to yield only concentration enhancements. Continuous measurements of turbulent wind and temperature statistics were used to model the dispersion plume. The analysis localized the source to within 0.8 m of the true position and the emission rates were determined to better than 3% accuracy. This technique will be useful in assurance monitoring for geological storage of CO2 and for applications requiring knowledge of the location and rate of fugitive emissions.

Product Type

nonGeographicDataset

eCat Id

72702

Contact for the resource

  Custodian

ED  

  Owner

Commonwealth of Australia (Geoscience Australia)  

  Custodian

Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia

Digital Object Identifier

http://dx.doi.org/10.1021/es202807s

Keywords

  • External PublicationScientific Journal Paper
( Theme )
  • carbon dioxide
( Theme )
  • geological storage of CO2
( Theme )
  • geological sequestration
( Theme )
  • greenhouse gas emissions
( Theme )
  • model
  • AU-ACT
Australian and New Zealand Standard Research Classification (ANZSRC)
  • Earth Sciences
  • Published_External

Publication Date

2011-01-01T00:00:00

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Australian Government Security ClassificationSystem    

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Creative Commons Attribution 4.0 International Licence    

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Use - license

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unknown

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geoscientificInformation

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Extents

[-35.5, -35.0, 149.0, 149.5]

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