Clays Are Not Created Equal: How Clay Mineral Type Affects Soil Parameterization
Abstract Clay minerals dominate the soil colloidal fraction and its specific surface area. Differences among clay mineral types significantly influence their effects on soil hydrological and mechanical behavior. Presently, the soil clay content is used to parameterize soil hydraulic and mechanical p...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-10-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2021GL095311 |
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| author | P. Lehmann B. Leshchinsky S. Gupta B. B. Mirus S. Bickel N. Lu D. Or |
| author_facet | P. Lehmann B. Leshchinsky S. Gupta B. B. Mirus S. Bickel N. Lu D. Or |
| author_sort | P. Lehmann |
| collection | DOAJ |
| description | Abstract Clay minerals dominate the soil colloidal fraction and its specific surface area. Differences among clay mineral types significantly influence their effects on soil hydrological and mechanical behavior. Presently, the soil clay content is used to parameterize soil hydraulic and mechanical properties (SHMP) for land surface models while disregarding the type of clay mineral. This undifferentiated use of clay leads to inconsistent parameterization, particularly between tropical and temperate soils, as shown herein. We capitalize on recent global maps of clay minerals that exhibit strong climatic and spatial segregation of active and inactive clays to consider spatially resolved clay mineral types in SHMP estimation. Clay mineral‐informed pedotransfer functions and machine learning algorithms trained with datasets including different clay types and soil structure formation processes improve SHMP representation regionally with broad implications for hydrological and geomechanical Earth surface processes. |
| format | Article |
| id | doaj-art-66adf106160c40e89e3ba5727cfbbfe7 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2021-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-66adf106160c40e89e3ba5727cfbbfe72025-08-20T03:22:14ZengWileyGeophysical Research Letters0094-82761944-80072021-10-014820n/an/a10.1029/2021GL095311Clays Are Not Created Equal: How Clay Mineral Type Affects Soil ParameterizationP. Lehmann0B. Leshchinsky1S. Gupta2B. B. Mirus3S. Bickel4N. Lu5D. Or6Soil and Terrestrial Environmental Physics ETH Zurich Zurich SwitzerlandCollege of Forestry Oregon State University Corvallis OR USASoil and Terrestrial Environmental Physics ETH Zurich Zurich SwitzerlandU.S. Geological Survey Landslides Hazards Program Denver CO USASoil and Terrestrial Environmental Physics ETH Zurich Zurich SwitzerlandColorado School of Mines Golden CO USASoil and Terrestrial Environmental Physics ETH Zurich Zurich SwitzerlandAbstract Clay minerals dominate the soil colloidal fraction and its specific surface area. Differences among clay mineral types significantly influence their effects on soil hydrological and mechanical behavior. Presently, the soil clay content is used to parameterize soil hydraulic and mechanical properties (SHMP) for land surface models while disregarding the type of clay mineral. This undifferentiated use of clay leads to inconsistent parameterization, particularly between tropical and temperate soils, as shown herein. We capitalize on recent global maps of clay minerals that exhibit strong climatic and spatial segregation of active and inactive clays to consider spatially resolved clay mineral types in SHMP estimation. Clay mineral‐informed pedotransfer functions and machine learning algorithms trained with datasets including different clay types and soil structure formation processes improve SHMP representation regionally with broad implications for hydrological and geomechanical Earth surface processes.https://doi.org/10.1029/2021GL095311clay mineralSoil hydraulic propertiespedotransfer functionsfriction angleclay fraction |
| spellingShingle | P. Lehmann B. Leshchinsky S. Gupta B. B. Mirus S. Bickel N. Lu D. Or Clays Are Not Created Equal: How Clay Mineral Type Affects Soil Parameterization Geophysical Research Letters clay mineral Soil hydraulic properties pedotransfer functions friction angle clay fraction |
| title | Clays Are Not Created Equal: How Clay Mineral Type Affects Soil Parameterization |
| title_full | Clays Are Not Created Equal: How Clay Mineral Type Affects Soil Parameterization |
| title_fullStr | Clays Are Not Created Equal: How Clay Mineral Type Affects Soil Parameterization |
| title_full_unstemmed | Clays Are Not Created Equal: How Clay Mineral Type Affects Soil Parameterization |
| title_short | Clays Are Not Created Equal: How Clay Mineral Type Affects Soil Parameterization |
| title_sort | clays are not created equal how clay mineral type affects soil parameterization |
| topic | clay mineral Soil hydraulic properties pedotransfer functions friction angle clay fraction |
| url | https://doi.org/10.1029/2021GL095311 |
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