Post-Fire Effect Modeling for the Permafrost Zone in Central Siberia on the Basis of Remote Sensing Data
The increasing trend of larch forests burning in the permafrost zone (60–65° N, 95–105° E) is observed in Siberia. Up to 10–15% of entire larch forests were damaged by wildfire during the last two decades. Current research analysed the reflectance and thermal anomalies of the post-pyrogenic sites un...
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ftmdpi:oai:mdpi.com:/2504-3900/18/1/6/ 2023-08-20T04:09:11+02:00 Post-Fire Effect Modeling for the Permafrost Zone in Central Siberia on the Basis of Remote Sensing Data Evgenii Ponomarev Tatiana Ponomareva Oxana Masyagina Evgeny Shvetsov Oleg Ponomarev Konstantin Krasnoshchekov Alexander Dergunov 2019-06-04 application/pdf https://doi.org/10.3390/ECRS-3-06202 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/ECRS-3-06202 https://creativecommons.org/licenses/by/4.0/ Proceedings; Volume 18; Issue 1; Pages: 6 remote sensing permafrost larch forests thermal anomaly post-pyrogenic sites seasonal thawed layer Text 2019 ftmdpi https://doi.org/10.3390/ECRS-3-06202 2023-07-31T22:25:05Z The increasing trend of larch forests burning in the permafrost zone (60–65° N, 95–105° E) is observed in Siberia. Up to 10–15% of entire larch forests were damaged by wildfire during the last two decades. Current research analysed the reflectance and thermal anomalies of the post-pyrogenic sites under the conditions of permafrost. Studies are based on a long-term Terra and Aqua/MODIS (Moderate Resolution Imaging Spectroradiometer) survey for 2006–2018. We used IR thermal range data of 10.780–11.280 microns (MOD11A1 product) and we evaluated the Normalized Difference Vegetation Index (NDVI) from MOD09GQ product as well. The averaged temperature and NDVI dynamics were investigated in total for 50 post-fire plots under different stages of succession (1, 2, 5 and 10 years after burning) in comparison with non-disturbed vegetation cover sites under the same conditions. We recorded higher temperatures (20–47% higher than average background value) and lower NDVI values (9–63% lower than non-disturbed vegetation cover) persisting for the first 10 years after the fire. Under conditions of natural restoration, thermal anomalies of the ground cover remained significant for more than 15 years, which was reflected in long-term satellite data and confirmed by ground-based measurements. To estimate the impact of thermal anomalies on soil temperature and thawed layer depth we used the Stefan’s solution for the thermal conductivity equation. According to the results of numerical simulation, depth of the seasonal thawed layer could increase more than 20% in comparison with the average statistical norm under the conditions of excessive heating of the underlying layers. This is a significant factor in the stability of Siberian permafrost ecosystems requiring long-term monitoring. Text permafrost Siberia MDPI Open Access Publishing 3rd International Electronic Conference on Remote Sensing 6 |
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English |
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remote sensing permafrost larch forests thermal anomaly post-pyrogenic sites seasonal thawed layer |
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remote sensing permafrost larch forests thermal anomaly post-pyrogenic sites seasonal thawed layer Evgenii Ponomarev Tatiana Ponomareva Oxana Masyagina Evgeny Shvetsov Oleg Ponomarev Konstantin Krasnoshchekov Alexander Dergunov Post-Fire Effect Modeling for the Permafrost Zone in Central Siberia on the Basis of Remote Sensing Data |
topic_facet |
remote sensing permafrost larch forests thermal anomaly post-pyrogenic sites seasonal thawed layer |
description |
The increasing trend of larch forests burning in the permafrost zone (60–65° N, 95–105° E) is observed in Siberia. Up to 10–15% of entire larch forests were damaged by wildfire during the last two decades. Current research analysed the reflectance and thermal anomalies of the post-pyrogenic sites under the conditions of permafrost. Studies are based on a long-term Terra and Aqua/MODIS (Moderate Resolution Imaging Spectroradiometer) survey for 2006–2018. We used IR thermal range data of 10.780–11.280 microns (MOD11A1 product) and we evaluated the Normalized Difference Vegetation Index (NDVI) from MOD09GQ product as well. The averaged temperature and NDVI dynamics were investigated in total for 50 post-fire plots under different stages of succession (1, 2, 5 and 10 years after burning) in comparison with non-disturbed vegetation cover sites under the same conditions. We recorded higher temperatures (20–47% higher than average background value) and lower NDVI values (9–63% lower than non-disturbed vegetation cover) persisting for the first 10 years after the fire. Under conditions of natural restoration, thermal anomalies of the ground cover remained significant for more than 15 years, which was reflected in long-term satellite data and confirmed by ground-based measurements. To estimate the impact of thermal anomalies on soil temperature and thawed layer depth we used the Stefan’s solution for the thermal conductivity equation. According to the results of numerical simulation, depth of the seasonal thawed layer could increase more than 20% in comparison with the average statistical norm under the conditions of excessive heating of the underlying layers. This is a significant factor in the stability of Siberian permafrost ecosystems requiring long-term monitoring. |
format |
Text |
author |
Evgenii Ponomarev Tatiana Ponomareva Oxana Masyagina Evgeny Shvetsov Oleg Ponomarev Konstantin Krasnoshchekov Alexander Dergunov |
author_facet |
Evgenii Ponomarev Tatiana Ponomareva Oxana Masyagina Evgeny Shvetsov Oleg Ponomarev Konstantin Krasnoshchekov Alexander Dergunov |
author_sort |
Evgenii Ponomarev |
title |
Post-Fire Effect Modeling for the Permafrost Zone in Central Siberia on the Basis of Remote Sensing Data |
title_short |
Post-Fire Effect Modeling for the Permafrost Zone in Central Siberia on the Basis of Remote Sensing Data |
title_full |
Post-Fire Effect Modeling for the Permafrost Zone in Central Siberia on the Basis of Remote Sensing Data |
title_fullStr |
Post-Fire Effect Modeling for the Permafrost Zone in Central Siberia on the Basis of Remote Sensing Data |
title_full_unstemmed |
Post-Fire Effect Modeling for the Permafrost Zone in Central Siberia on the Basis of Remote Sensing Data |
title_sort |
post-fire effect modeling for the permafrost zone in central siberia on the basis of remote sensing data |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/ECRS-3-06202 |
genre |
permafrost Siberia |
genre_facet |
permafrost Siberia |
op_source |
Proceedings; Volume 18; Issue 1; Pages: 6 |
op_relation |
https://dx.doi.org/10.3390/ECRS-3-06202 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/ECRS-3-06202 |
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3rd International Electronic Conference on Remote Sensing |
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