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Dielectric Characterization of Soil Samples by Microwave Measurements

Santos, Telmo LU ; Johansson, Anders J LU and Tufvesson, Fredrik LU (2009) In Series of Technical Reports 10.
Abstract
Northern high-latitude wetlands are well known to seasonally emit methane gas into the atmosphere, and therefore contribute to greenhouse effects.

While these gas emissions are well documented, their causes are not well understood. The method described in this work can be used to analyze the changes happening in the soil during gas emissions, and therefore help the understanding of the sub-surface gas dynamics.



We have monitored a sample of peat soil through an artificial freezing and thawing cycle, using both a gas detector to measure the methane flux at the soil surface and a vector network analyzer to measure the transmission of microwaves through the soil. It was observed that the results from the two... (More)
Northern high-latitude wetlands are well known to seasonally emit methane gas into the atmosphere, and therefore contribute to greenhouse effects.

While these gas emissions are well documented, their causes are not well understood. The method described in this work can be used to analyze the changes happening in the soil during gas emissions, and therefore help the understanding of the sub-surface gas dynamics.



We have monitored a sample of peat soil through an artificial freezing and thawing cycle, using both a gas detector to measure the methane flux at the soil surface and a vector network analyzer to measure the transmission of microwaves through the soil. It was observed that the results from the two measurement approaches had a very good match under specific microwave signal conditions. In addition, from the microwave measured data, the dielectric properties of the soil and the volumetric fractions of its constituents were also calculated based on a dielectric mixing model. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Book/Report
publication status
published
subject
keywords
dielectric constant, Methane emissions, soil, microwave measurements
in
Series of Technical Reports
volume
10
pages
18 pages
publisher
Department of Electrical and Information Technology, Lund University
ISSN
1402-8840
language
English
LU publication?
yes
id
be05e211-d9d2-48b7-8d07-f685208c7832 (old id 1479796)
date added to LUP
2009-10-06 07:21:20
date last changed
2016-04-15 22:34:14
@techreport{be05e211-d9d2-48b7-8d07-f685208c7832,
  abstract     = {Northern high-latitude wetlands are well known to seasonally emit methane gas into the atmosphere, and therefore contribute to greenhouse effects.<br/><br>
	While these gas emissions are well documented, their causes are not well understood. The method described in this work can be used to analyze the changes happening in the soil during gas emissions, and therefore help the understanding of the sub-surface gas dynamics.<br/><br>
	<br/><br>
	We have monitored a sample of peat soil through an artificial freezing and thawing cycle, using both a gas detector to measure the methane flux at the soil surface and a vector network analyzer to measure the transmission of microwaves through the soil. It was observed that the results from the two measurement approaches had a very good match under specific microwave signal conditions. In addition, from the microwave measured data, the dielectric properties of the soil and the volumetric fractions of its constituents were also calculated based on a dielectric mixing model.},
  author       = {Santos, Telmo and Johansson, Anders J and Tufvesson, Fredrik},
  institution  = {Department of Electrical and Information Technology, Lund University},
  issn         = {1402-8840},
  keyword      = {dielectric constant,Methane emissions,soil,microwave measurements},
  language     = {eng},
  pages        = {18},
  series       = {Series of Technical Reports},
  title        = {Dielectric Characterization of Soil Samples by Microwave Measurements},
  volume       = {10},
  year         = {2009},
}