Eddy covariance mapping and quantification of surface CO2 leakage fluxes
We present eddy covariance measurements of net CO{sub 2} flux (F{sub c}) made during a controlled release of CO{sub 2} (0.3 t d{sup -1} from 9 July to 7 August 2008) from a horizontal well {approx}100 m in length and {approx}2.5 m in depth located in an agricultural field in Bozeman, MT. We isolated fluxes arising from the release (F{sub cr}) by subtracting fluxes corresponding to a model for net ecosystem exchange from F{sub c}. A least-squares inversion of 611 F{sub cr} and corresponding modeled footprint functions recovered the location, length, and magnitude of the surface CO{sub 2} flux leakage signal, although high wavenumber details of the signal were poorly resolved. The estimated total surface CO{sub 2} leakage rate (0.32 t d{sup ?1}) was within 7% of the release rate.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- Earth Sciences Division
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 973694
- Report Number(s):
- LBNL-2633E; GPRLAJ; TRN: US201006%%1066
- Journal Information:
- Geophysical Research Letters, Vol. 36; Related Information: Journal Publication Date: 2009; ISSN 0094-8276
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dynamics of CO2 fluxes and concentrations during a shallow subsurface CO2 release
Time-windows-based filtering method for near-surface detection of leakage from geologic carbon sequestration sites