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Investigating variability of biogenic gas dynamics in peat soils using high temporal frequency hydrogeophysical methods [electronic resource] /

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Keywords
  • Gas Dynamics.
  • Wetland Ecology.
  • Soil Permeability.
  • Estuarine Sediments.
  • Ground Penetrating Radar.
  • Hydrogeology.
  • Geophysics.

Abstract

Peat soils are known to be a significant source of atmospheric greenhouse gasses. However, the releases of methane and carbon dioxide gasses from peat soils are currently not well understood, particularly since the timing of the releases are poorly constrained. Furthermore, most research work performed on peatlands has been focused on temperate to sub-arctic peatlands, while recent works have suggested that gas production rates from low-latitude peat soils are higher than those from colder climates. The purpose of the work proposed here is to introduce an autonomous Ground Penetrating Radar (GPR) method for investigating the timing of gas releases from peat soils at the lab scale utilizing samples originating from Maine and the Florida Everglades, and at the field scale in a Maine peatland. Geophysical data are supported by direct gas flux measurements using the flux chamber method enhanced by timelapse photography, and terrestrial LiDAR (TLS) monitoring surface deformation.

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