Permafrost Dynamics Observatory (PDO): 2. Joint Retrieval of Permafrost Active Layer Thickness and Soil Moisture From L‐Band InSAR and P‐Band PolSAR
Abstract Seasonal subsidence induced by ground ice melt can be measured by interferometric synthetic aperture radar (InSAR) techniques to infer active layer thickness (ALT) in permafrost regions. The magnitude of subsidence depends on both how deep the soil thawed and how much ice/water content exis...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Geophysical Union (AGU)
2023-01-01
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| Series: | Earth and Space Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2022EA002453 |
| _version_ | 1811176706958950400 |
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| author | Richard H. Chen Roger J. Michaelides Yuhuan Zhao Lingcao Huang Elizabeth Wig Taylor D. Sullivan Andrew D. Parsekian Howard A. Zebker Mahta Moghaddam Kevin M. Schaefer |
| author_facet | Richard H. Chen Roger J. Michaelides Yuhuan Zhao Lingcao Huang Elizabeth Wig Taylor D. Sullivan Andrew D. Parsekian Howard A. Zebker Mahta Moghaddam Kevin M. Schaefer |
| author_sort | Richard H. Chen |
| collection | DOAJ |
| description | Abstract Seasonal subsidence induced by ground ice melt can be measured by interferometric synthetic aperture radar (InSAR) techniques to infer active layer thickness (ALT) in permafrost regions. The magnitude of subsidence depends on both how deep the soil thawed and how much ice/water content existed in the active layer soil. To provide the later, P‐band polarimetric synthetic aperture radar (PolSAR) backscatter is used due to its sensitivity to subsurface soil moisture and freeze/thaw conditions. In this study, which is the second in a two‐part series of Permafrost Dynamics Observatory (PDO), we exploit L‐band InSAR subsidence and P‐band PolSAR backscatter in a joint retrieval scheme to simultaneously estimate ALT and soil moisture profile of permafrost active layer. Both subsidence and backscatter are explicitly characterized by physics‐based models and share a common set of soil parameters including porosity and water saturation profiles. The PDO joint retrieval has been applied to the L‐ and P‐band SAR data acquired by National Aeronautics and Space Administration/Jet Propulsion Laboratory's Uninhabited Aerial Vehicle Synthetic Aperture Radar over Alaska and western Canada during the 2017 Arctic‐Boreal Vulnerability Experiment (ABoVE) airborne campaign. This high‐resolution (30 m) regional estimates of ALT and soil moisture profile spanning over the ABoVE study domain can help link the ground‐based field surveys with satellite observations to further understand the permafrost and active layer soil process dynamics to disturbances and climate change occurring across the northern circumpolar region. |
| first_indexed | 2024-04-10T19:57:16Z |
| format | Article |
| id | doaj.art-84ebcbc88e44472aa8b7a64ee489144c |
| institution | Directory Open Access Journal |
| issn | 2333-5084 |
| language | English |
| last_indexed | 2024-04-10T19:57:16Z |
| publishDate | 2023-01-01 |
| publisher | American Geophysical Union (AGU) |
| record_format | Article |
| series | Earth and Space Science |
| spelling | doaj.art-84ebcbc88e44472aa8b7a64ee489144c2023-01-27T18:36:33ZengAmerican Geophysical Union (AGU)Earth and Space Science2333-50842023-01-01101n/an/a10.1029/2022EA002453Permafrost Dynamics Observatory (PDO): 2. Joint Retrieval of Permafrost Active Layer Thickness and Soil Moisture From L‐Band InSAR and P‐Band PolSARRichard H. Chen0Roger J. Michaelides1Yuhuan Zhao2Lingcao Huang3Elizabeth Wig4Taylor D. Sullivan5Andrew D. Parsekian6Howard A. Zebker7Mahta Moghaddam8Kevin M. Schaefer9Jet Propulsion Laboratory California Institute of Technology Pasadena CA USAWashington University in St. Louis St. Louis MO USAUniversity of Southern California Los Angeles CA USAUniversity of Colorado Boulder Boulder CO USAStanford University Stanford CA USAUniversity of Wyoming Laramie WY USAUniversity of Wyoming Laramie WY USAStanford University Stanford CA USAUniversity of Southern California Los Angeles CA USAUniversity of Colorado Boulder Boulder CO USAAbstract Seasonal subsidence induced by ground ice melt can be measured by interferometric synthetic aperture radar (InSAR) techniques to infer active layer thickness (ALT) in permafrost regions. The magnitude of subsidence depends on both how deep the soil thawed and how much ice/water content existed in the active layer soil. To provide the later, P‐band polarimetric synthetic aperture radar (PolSAR) backscatter is used due to its sensitivity to subsurface soil moisture and freeze/thaw conditions. In this study, which is the second in a two‐part series of Permafrost Dynamics Observatory (PDO), we exploit L‐band InSAR subsidence and P‐band PolSAR backscatter in a joint retrieval scheme to simultaneously estimate ALT and soil moisture profile of permafrost active layer. Both subsidence and backscatter are explicitly characterized by physics‐based models and share a common set of soil parameters including porosity and water saturation profiles. The PDO joint retrieval has been applied to the L‐ and P‐band SAR data acquired by National Aeronautics and Space Administration/Jet Propulsion Laboratory's Uninhabited Aerial Vehicle Synthetic Aperture Radar over Alaska and western Canada during the 2017 Arctic‐Boreal Vulnerability Experiment (ABoVE) airborne campaign. This high‐resolution (30 m) regional estimates of ALT and soil moisture profile spanning over the ABoVE study domain can help link the ground‐based field surveys with satellite observations to further understand the permafrost and active layer soil process dynamics to disturbances and climate change occurring across the northern circumpolar region.https://doi.org/10.1029/2022EA002453InSARPolSARUAVSARpermafrostactive layer thicknesssoil moisture |
| spellingShingle | Richard H. Chen Roger J. Michaelides Yuhuan Zhao Lingcao Huang Elizabeth Wig Taylor D. Sullivan Andrew D. Parsekian Howard A. Zebker Mahta Moghaddam Kevin M. Schaefer Permafrost Dynamics Observatory (PDO): 2. Joint Retrieval of Permafrost Active Layer Thickness and Soil Moisture From L‐Band InSAR and P‐Band PolSAR Earth and Space Science InSAR PolSAR UAVSAR permafrost active layer thickness soil moisture |
| title | Permafrost Dynamics Observatory (PDO): 2. Joint Retrieval of Permafrost Active Layer Thickness and Soil Moisture From L‐Band InSAR and P‐Band PolSAR |
| title_full | Permafrost Dynamics Observatory (PDO): 2. Joint Retrieval of Permafrost Active Layer Thickness and Soil Moisture From L‐Band InSAR and P‐Band PolSAR |
| title_fullStr | Permafrost Dynamics Observatory (PDO): 2. Joint Retrieval of Permafrost Active Layer Thickness and Soil Moisture From L‐Band InSAR and P‐Band PolSAR |
| title_full_unstemmed | Permafrost Dynamics Observatory (PDO): 2. Joint Retrieval of Permafrost Active Layer Thickness and Soil Moisture From L‐Band InSAR and P‐Band PolSAR |
| title_short | Permafrost Dynamics Observatory (PDO): 2. Joint Retrieval of Permafrost Active Layer Thickness and Soil Moisture From L‐Band InSAR and P‐Band PolSAR |
| title_sort | permafrost dynamics observatory pdo 2 joint retrieval of permafrost active layer thickness and soil moisture from l band insar and p band polsar |
| topic | InSAR PolSAR UAVSAR permafrost active layer thickness soil moisture |
| url | https://doi.org/10.1029/2022EA002453 |
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