Soil moisture sensor calibration for organic soil surface layers
This paper's objective is to present generic calibration functions for organic surface layers derived for the soil moisture sensors Decagon ECH2O 5TE and Delta-T ThetaProbe ML2x, using material from northern regions, mainly from the Finnish Meteorological Institute's Arctic Research Center...
Published in: | Geoscientific Instrumentation, Methods and Data Systems |
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Online Access: | http://hdl.handle.net/2078.1/174119 https://doi.org/10.5194/gi-5-109-2016 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:174119 2024-05-12T08:00:33+00:00 Soil moisture sensor calibration for organic soil surface layers Bircher, Simone Andreasen, Mie Vuollet, Johanna Vehviläinen, Juho Rautiainen, Kimmo Jonard, François Weihermüller, Lutz Zakharova, Elena Wigneron, Jean-Pierre Kerr, Yann H. UCL - SST/ELI/ELIE - Environmental Sciences 2016 http://hdl.handle.net/2078.1/174119 https://doi.org/10.5194/gi-5-109-2016 eng eng Copernicus GmbH boreal:174119 http://hdl.handle.net/2078.1/174119 doi:10.5194/gi-5-109-2016 urn:ISSN:2193-0856 urn:EISSN:2193-0864 info:eu-repo/semantics/restrictedAccess Geoscientific Instrumentation, Methods and Data Systems, Vol. 5, no.1, p. 109-125 (2016) Soil moisture Organic surface layers Permittivity 1429 2470 3660 info:eu-repo/semantics/article 2016 ftunistlouisbrus https://doi.org/10.5194/gi-5-109-2016 2024-04-18T17:41:53Z This paper's objective is to present generic calibration functions for organic surface layers derived for the soil moisture sensors Decagon ECH2O 5TE and Delta-T ThetaProbe ML2x, using material from northern regions, mainly from the Finnish Meteorological Institute's Arctic Research Center in Sodankylä and the study area of the Danish Center for Hydrology (HOBE). For the Decagon 5TE sensor such a function is currently not reported in the literature. Data were compared with measurements from underlying mineral soils including laboratory and field measurements. Shrinkage and charring during drying were considered. For both sensors all field and lab data showed consistent trends. For mineral layers with low soil organic matter (SOM) content the validity of the manufacturer's calibrations was demonstrated. Deviating sensor outputs in organic and mineral horizons were identified. For the Decagon 5TE, apparent relative permittivities at a given moisture content decreased for increased SOM content, which was attributed to an increase of bound water in organic materials with large specific surface areas compared to the studied mineral soils. ThetaProbe measurements from organic horizons showed stronger nonlinearity in the sensor response and signal saturation in the high-level data. The derived calibration fit functions between sensor response and volumetric water content hold for samples spanning a wide range of humus types with differing SOM characteristics. This strengthens confidence in their validity under various conditions, rendering them highly suitable for large-scale applications in remote sensing and land surface modeling studies. Agreement between independent Decagon 5TE and ThetaProbe time series from an organic surface layer at the Sodankylä site was significantly improved when the here-proposed fit functions were used. Decagon 5TE data also well-reflected precipitation events. Thus, Decagon 5TE network data from organic surface layers at the Sodankylä and HOBE sites are based on the here-proposed ... Article in Journal/Newspaper Arctic DIAL@USL-B (Université Saint-Louis, Bruxelles) Arctic Geoscientific Instrumentation, Methods and Data Systems 5 1 109 125 |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
topic |
Soil moisture Organic surface layers Permittivity 1429 2470 3660 |
spellingShingle |
Soil moisture Organic surface layers Permittivity 1429 2470 3660 Bircher, Simone Andreasen, Mie Vuollet, Johanna Vehviläinen, Juho Rautiainen, Kimmo Jonard, François Weihermüller, Lutz Zakharova, Elena Wigneron, Jean-Pierre Kerr, Yann H. Soil moisture sensor calibration for organic soil surface layers |
topic_facet |
Soil moisture Organic surface layers Permittivity 1429 2470 3660 |
description |
This paper's objective is to present generic calibration functions for organic surface layers derived for the soil moisture sensors Decagon ECH2O 5TE and Delta-T ThetaProbe ML2x, using material from northern regions, mainly from the Finnish Meteorological Institute's Arctic Research Center in Sodankylä and the study area of the Danish Center for Hydrology (HOBE). For the Decagon 5TE sensor such a function is currently not reported in the literature. Data were compared with measurements from underlying mineral soils including laboratory and field measurements. Shrinkage and charring during drying were considered. For both sensors all field and lab data showed consistent trends. For mineral layers with low soil organic matter (SOM) content the validity of the manufacturer's calibrations was demonstrated. Deviating sensor outputs in organic and mineral horizons were identified. For the Decagon 5TE, apparent relative permittivities at a given moisture content decreased for increased SOM content, which was attributed to an increase of bound water in organic materials with large specific surface areas compared to the studied mineral soils. ThetaProbe measurements from organic horizons showed stronger nonlinearity in the sensor response and signal saturation in the high-level data. The derived calibration fit functions between sensor response and volumetric water content hold for samples spanning a wide range of humus types with differing SOM characteristics. This strengthens confidence in their validity under various conditions, rendering them highly suitable for large-scale applications in remote sensing and land surface modeling studies. Agreement between independent Decagon 5TE and ThetaProbe time series from an organic surface layer at the Sodankylä site was significantly improved when the here-proposed fit functions were used. Decagon 5TE data also well-reflected precipitation events. Thus, Decagon 5TE network data from organic surface layers at the Sodankylä and HOBE sites are based on the here-proposed ... |
author2 |
UCL - SST/ELI/ELIE - Environmental Sciences |
format |
Article in Journal/Newspaper |
author |
Bircher, Simone Andreasen, Mie Vuollet, Johanna Vehviläinen, Juho Rautiainen, Kimmo Jonard, François Weihermüller, Lutz Zakharova, Elena Wigneron, Jean-Pierre Kerr, Yann H. |
author_facet |
Bircher, Simone Andreasen, Mie Vuollet, Johanna Vehviläinen, Juho Rautiainen, Kimmo Jonard, François Weihermüller, Lutz Zakharova, Elena Wigneron, Jean-Pierre Kerr, Yann H. |
author_sort |
Bircher, Simone |
title |
Soil moisture sensor calibration for organic soil surface layers |
title_short |
Soil moisture sensor calibration for organic soil surface layers |
title_full |
Soil moisture sensor calibration for organic soil surface layers |
title_fullStr |
Soil moisture sensor calibration for organic soil surface layers |
title_full_unstemmed |
Soil moisture sensor calibration for organic soil surface layers |
title_sort |
soil moisture sensor calibration for organic soil surface layers |
publisher |
Copernicus GmbH |
publishDate |
2016 |
url |
http://hdl.handle.net/2078.1/174119 https://doi.org/10.5194/gi-5-109-2016 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Geoscientific Instrumentation, Methods and Data Systems, Vol. 5, no.1, p. 109-125 (2016) |
op_relation |
boreal:174119 http://hdl.handle.net/2078.1/174119 doi:10.5194/gi-5-109-2016 urn:ISSN:2193-0856 urn:EISSN:2193-0864 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.5194/gi-5-109-2016 |
container_title |
Geoscientific Instrumentation, Methods and Data Systems |
container_volume |
5 |
container_issue |
1 |
container_start_page |
109 |
op_container_end_page |
125 |
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