Ground Surface Displacement After a Forest Fire Near Mayya, Eastern Siberia, Using InSAR: Observation and Implication for Geophysical Modeling
Abstract Forest fires significantly impact permafrost degradation in the subarctic regions. However, interannual and seasonal variations in surface deformation due to permafrost thawing in burned areas were poorly understood. Measuring the ground surface displacement in fire scars helps us understan...
Published in: | Earth and Space Science |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union (AGU)
2022
|
Subjects: | |
Online Access: | https://doi.org/10.1029/2022EA002476 https://doaj.org/article/cd1dbd1a561b4fb6bceecd1335f679e4 |
id |
ftdoajarticles:oai:doaj.org/article:cd1dbd1a561b4fb6bceecd1335f679e4 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:cd1dbd1a561b4fb6bceecd1335f679e4 2023-05-15T16:36:57+02:00 Ground Surface Displacement After a Forest Fire Near Mayya, Eastern Siberia, Using InSAR: Observation and Implication for Geophysical Modeling Takahiro Abe Go Iwahana Takeo Tadono Yoshihiro Iijima 2022-11-01T00:00:00Z https://doi.org/10.1029/2022EA002476 https://doaj.org/article/cd1dbd1a561b4fb6bceecd1335f679e4 EN eng American Geophysical Union (AGU) https://doi.org/10.1029/2022EA002476 https://doaj.org/toc/2333-5084 2333-5084 doi:10.1029/2022EA002476 https://doaj.org/article/cd1dbd1a561b4fb6bceecd1335f679e4 Earth and Space Science, Vol 9, Iss 11, Pp n/a-n/a (2022) Astronomy QB1-991 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.1029/2022EA002476 2022-12-30T22:38:05Z Abstract Forest fires significantly impact permafrost degradation in the subarctic regions. However, interannual and seasonal variations in surface deformation due to permafrost thawing in burned areas were poorly understood. Measuring the ground surface displacement in fire scars helps us understand the freeze‐thaw dynamics of near‐surface ground and predict the future state, particularly in ice‐rich permafrost regions. This study used the L‐ and C‐band interferometric synthetic aperture radar technique to reveal interannual subsidence and seasonal thaw settlement/frost heave in a fire scar near Mayya, Sakha Republic in Eastern Siberia burned in 2013. We found that the cumulative subsidence was up to 7 cm between 2014 and 2020, most of which had occurred by 2016. The magnitude of seasonal thaw settlement and frost heave varied each year from 2017 to 2020 after the fire, but the interannual change in frost heave corresponded to the temporal variation in precipitation during the thawing season from 2017 to 2020. This suggests that the precipitation amount during the thawing season is related to the magnitude of segregation‐ice formation in the sediments, which determines the frost heave amount. The observed seasonal displacements could not be quantitatively explained by models inferred from the Stefan's equation and volume changes associated with ice‐water phase change. This implies that other models associated with segregated ice (ice lens) formation/thaw are required to explain the observed seasonal displacement. Article in Journal/Newspaper Ice permafrost Sakha Sakha Republic Subarctic Siberia Directory of Open Access Journals: DOAJ Articles Sakha Mayya ENVELOPE(130.282,130.282,61.738,61.738) Earth and Space Science 9 11 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Astronomy QB1-991 Geology QE1-996.5 |
spellingShingle |
Astronomy QB1-991 Geology QE1-996.5 Takahiro Abe Go Iwahana Takeo Tadono Yoshihiro Iijima Ground Surface Displacement After a Forest Fire Near Mayya, Eastern Siberia, Using InSAR: Observation and Implication for Geophysical Modeling |
topic_facet |
Astronomy QB1-991 Geology QE1-996.5 |
description |
Abstract Forest fires significantly impact permafrost degradation in the subarctic regions. However, interannual and seasonal variations in surface deformation due to permafrost thawing in burned areas were poorly understood. Measuring the ground surface displacement in fire scars helps us understand the freeze‐thaw dynamics of near‐surface ground and predict the future state, particularly in ice‐rich permafrost regions. This study used the L‐ and C‐band interferometric synthetic aperture radar technique to reveal interannual subsidence and seasonal thaw settlement/frost heave in a fire scar near Mayya, Sakha Republic in Eastern Siberia burned in 2013. We found that the cumulative subsidence was up to 7 cm between 2014 and 2020, most of which had occurred by 2016. The magnitude of seasonal thaw settlement and frost heave varied each year from 2017 to 2020 after the fire, but the interannual change in frost heave corresponded to the temporal variation in precipitation during the thawing season from 2017 to 2020. This suggests that the precipitation amount during the thawing season is related to the magnitude of segregation‐ice formation in the sediments, which determines the frost heave amount. The observed seasonal displacements could not be quantitatively explained by models inferred from the Stefan's equation and volume changes associated with ice‐water phase change. This implies that other models associated with segregated ice (ice lens) formation/thaw are required to explain the observed seasonal displacement. |
format |
Article in Journal/Newspaper |
author |
Takahiro Abe Go Iwahana Takeo Tadono Yoshihiro Iijima |
author_facet |
Takahiro Abe Go Iwahana Takeo Tadono Yoshihiro Iijima |
author_sort |
Takahiro Abe |
title |
Ground Surface Displacement After a Forest Fire Near Mayya, Eastern Siberia, Using InSAR: Observation and Implication for Geophysical Modeling |
title_short |
Ground Surface Displacement After a Forest Fire Near Mayya, Eastern Siberia, Using InSAR: Observation and Implication for Geophysical Modeling |
title_full |
Ground Surface Displacement After a Forest Fire Near Mayya, Eastern Siberia, Using InSAR: Observation and Implication for Geophysical Modeling |
title_fullStr |
Ground Surface Displacement After a Forest Fire Near Mayya, Eastern Siberia, Using InSAR: Observation and Implication for Geophysical Modeling |
title_full_unstemmed |
Ground Surface Displacement After a Forest Fire Near Mayya, Eastern Siberia, Using InSAR: Observation and Implication for Geophysical Modeling |
title_sort |
ground surface displacement after a forest fire near mayya, eastern siberia, using insar: observation and implication for geophysical modeling |
publisher |
American Geophysical Union (AGU) |
publishDate |
2022 |
url |
https://doi.org/10.1029/2022EA002476 https://doaj.org/article/cd1dbd1a561b4fb6bceecd1335f679e4 |
long_lat |
ENVELOPE(130.282,130.282,61.738,61.738) |
geographic |
Sakha Mayya |
geographic_facet |
Sakha Mayya |
genre |
Ice permafrost Sakha Sakha Republic Subarctic Siberia |
genre_facet |
Ice permafrost Sakha Sakha Republic Subarctic Siberia |
op_source |
Earth and Space Science, Vol 9, Iss 11, Pp n/a-n/a (2022) |
op_relation |
https://doi.org/10.1029/2022EA002476 https://doaj.org/toc/2333-5084 2333-5084 doi:10.1029/2022EA002476 https://doaj.org/article/cd1dbd1a561b4fb6bceecd1335f679e4 |
op_doi |
https://doi.org/10.1029/2022EA002476 |
container_title |
Earth and Space Science |
container_volume |
9 |
container_issue |
11 |
_version_ |
1766027269493489664 |