Widespread permafrost vulnerability and soil active layer increases over the high northern latitudes inferred from satellite remote sensing and process model assessments
Permafrost extent (PE) and active layer thickness (ALT) are important for assessing high northern latitude (HNL) ecological and hydrological processes, and potential land–atmosphere carbon and climate feedbacks. We developed a new approach to infer PE from satellite microwave remote sensing of daily...
Published in: | Remote Sensing of Environment |
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ftunivmontana:oai:scholarworks.umt.edu:ntsg_pubs-1321 2023-07-16T03:51:12+02:00 Widespread permafrost vulnerability and soil active layer increases over the high northern latitudes inferred from satellite remote sensing and process model assessments Park, Hotaek Kim, Youngwook Kimball, John S 2016-03-01T08:00:00Z application/pdf https://scholarworks.umt.edu/ntsg_pubs/322 https://doi.org/10.1016/j.rse.2015.12.046 unknown ScholarWorks at University of Montana https://scholarworks.umt.edu/ntsg_pubs/322 doi:10.1016/j.rse.2015.12.046 © 2016 Elsevier Numerical Terradynamic Simulation Group Publications Active layer thickness CHANGE Freeze/thaw FT-ESDR Permafrost text 2016 ftunivmontana https://doi.org/10.1016/j.rse.2015.12.046 2023-06-27T22:20:53Z Permafrost extent (PE) and active layer thickness (ALT) are important for assessing high northern latitude (HNL) ecological and hydrological processes, and potential land–atmosphere carbon and climate feedbacks. We developed a new approach to infer PE from satellite microwave remote sensing of daily landscape freeze–thaw (FT) status. Our results document, for the first time, the use of satellite microwave FT observations for monitoring permafrost extent and condition. The FT observations define near-surface thermal status used to determine permafrost extent and stability over a 30-year (1980–2009) satellite record. The PE results showed similar performance against independent inventory and process model (CHANGE) estimates, but with larger differences over heterogeneous permafrost subzones. A consistent decline in the ensemble mean of permafrost areas (− 0.33 million km2 decade− 1; p < 0.05) coincides with regional warming (0.4 °C decade− 1; p < 0.01), while more than 40% (9.6 million km2) of permafrost areas are vulnerable to degradation based on the 30-year PE record. ALT estimates determined from satellite (MODIS) and ERA-Interim temperatures, and CHANGE simulations, compared favorably with independent field observations and indicate deepening ALT trends consistent with widespread permafrost degradation under recent climate change. Text Active layer thickness permafrost University of Montana: ScholarWorks Remote Sensing of Environment 175 349 358 |
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Open Polar |
collection |
University of Montana: ScholarWorks |
op_collection_id |
ftunivmontana |
language |
unknown |
topic |
Active layer thickness CHANGE Freeze/thaw FT-ESDR Permafrost |
spellingShingle |
Active layer thickness CHANGE Freeze/thaw FT-ESDR Permafrost Park, Hotaek Kim, Youngwook Kimball, John S Widespread permafrost vulnerability and soil active layer increases over the high northern latitudes inferred from satellite remote sensing and process model assessments |
topic_facet |
Active layer thickness CHANGE Freeze/thaw FT-ESDR Permafrost |
description |
Permafrost extent (PE) and active layer thickness (ALT) are important for assessing high northern latitude (HNL) ecological and hydrological processes, and potential land–atmosphere carbon and climate feedbacks. We developed a new approach to infer PE from satellite microwave remote sensing of daily landscape freeze–thaw (FT) status. Our results document, for the first time, the use of satellite microwave FT observations for monitoring permafrost extent and condition. The FT observations define near-surface thermal status used to determine permafrost extent and stability over a 30-year (1980–2009) satellite record. The PE results showed similar performance against independent inventory and process model (CHANGE) estimates, but with larger differences over heterogeneous permafrost subzones. A consistent decline in the ensemble mean of permafrost areas (− 0.33 million km2 decade− 1; p < 0.05) coincides with regional warming (0.4 °C decade− 1; p < 0.01), while more than 40% (9.6 million km2) of permafrost areas are vulnerable to degradation based on the 30-year PE record. ALT estimates determined from satellite (MODIS) and ERA-Interim temperatures, and CHANGE simulations, compared favorably with independent field observations and indicate deepening ALT trends consistent with widespread permafrost degradation under recent climate change. |
format |
Text |
author |
Park, Hotaek Kim, Youngwook Kimball, John S |
author_facet |
Park, Hotaek Kim, Youngwook Kimball, John S |
author_sort |
Park, Hotaek |
title |
Widespread permafrost vulnerability and soil active layer increases over the high northern latitudes inferred from satellite remote sensing and process model assessments |
title_short |
Widespread permafrost vulnerability and soil active layer increases over the high northern latitudes inferred from satellite remote sensing and process model assessments |
title_full |
Widespread permafrost vulnerability and soil active layer increases over the high northern latitudes inferred from satellite remote sensing and process model assessments |
title_fullStr |
Widespread permafrost vulnerability and soil active layer increases over the high northern latitudes inferred from satellite remote sensing and process model assessments |
title_full_unstemmed |
Widespread permafrost vulnerability and soil active layer increases over the high northern latitudes inferred from satellite remote sensing and process model assessments |
title_sort |
widespread permafrost vulnerability and soil active layer increases over the high northern latitudes inferred from satellite remote sensing and process model assessments |
publisher |
ScholarWorks at University of Montana |
publishDate |
2016 |
url |
https://scholarworks.umt.edu/ntsg_pubs/322 https://doi.org/10.1016/j.rse.2015.12.046 |
genre |
Active layer thickness permafrost |
genre_facet |
Active layer thickness permafrost |
op_source |
Numerical Terradynamic Simulation Group Publications |
op_relation |
https://scholarworks.umt.edu/ntsg_pubs/322 doi:10.1016/j.rse.2015.12.046 |
op_rights |
© 2016 Elsevier |
op_doi |
https://doi.org/10.1016/j.rse.2015.12.046 |
container_title |
Remote Sensing of Environment |
container_volume |
175 |
container_start_page |
349 |
op_container_end_page |
358 |
_version_ |
1771545625298468864 |