Document Type

Article

Publication Title

Geophysical Research Letters

Publication Date

4-16-2005

Issue Number

8

Publication Number

L08401

Volume Number

32

Abstract/ Summary

We performed surface and borehole ground penetrating radar (GPR) tests, together with moisture probe measurements and direct gas sampling to detect areas of biogenic gas accumulation in a northern peatland. The main findings are: (1) shadow zones (signal scattering) observed in surface GPR correlate with areas of elevated CH4 and CO2 concentration; (2) high velocities in zero offset profiles and lower water content inferred from moisture probes correlate with surface GPR shadow zones; (3) zero offset profiles depict depth variable gas accumulation from 0-10% by volume; (4) strong reflectors may represent confining layers restricting upward gas migration. Our results have implications for defining the spatial distribution, volume and movement of biogenic gas in peatlands at multiple scales.

Citation/Publisher Attribution

Comas, X, Slater, L, and Reeve, A, 2005, Spatial Variability in Biogenic Gas Accumulations in Peat Soils Is Revealed By Ground Penetrating Radar (GPR): Geophysical Research Letters, v. 32, L08401. To view the published open abstract, go to http://dx.doi.org and enter the DOI.

Publisher Statement

© Copyright 2005 American Geophysical Union

DOI

10.1029/2004GL022297

Version

publisher's version of the published document

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