Freeze-up time at (A) the upland black spruce forest site after 15 cm of the organic layer was removed and (B) the lowland black spruce forest site after 48 cm of the organic layer was removed
Figure 10. Freeze-up time at (A) the upland black spruce forest site after 15 cm of the organic layer was removed and (B) the lowland black spruce forest site after 48 cm of the organic layer was removed. Here 0 is a year corresponding to the upper organic layer removal. Abstract Fire is an importan...
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ftdatacite:10.6084/m9.figshare.1011805.v1 2023-05-15T17:56:23+02:00 Freeze-up time at (A) the upland black spruce forest site after 15 cm of the organic layer was removed and (B) the lowland black spruce forest site after 48 cm of the organic layer was removed E E Jafarov V E Romanovsky H Genet A D McGuire S S Marchenko 2013 https://dx.doi.org/10.6084/m9.figshare.1011805.v1 https://iop.figshare.com/articles/figure/_Freeze_up_time_at_A_the_upland_black_spruce_forest_site_after_15_cm_of_the_organic_layer_was_remove/1011805/1 unknown IOP Publishing https://dx.doi.org/10.6084/m9.figshare.1011805 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Environmental Science Image Figure graphic ImageObject 2013 ftdatacite https://doi.org/10.6084/m9.figshare.1011805.v1 https://doi.org/10.6084/m9.figshare.1011805 2021-11-05T12:55:41Z Figure 10. Freeze-up time at (A) the upland black spruce forest site after 15 cm of the organic layer was removed and (B) the lowland black spruce forest site after 48 cm of the organic layer was removed. Here 0 is a year corresponding to the upper organic layer removal. Abstract Fire is an important factor controlling the composition and thickness of the organic layer in the black spruce forest ecosystems of interior Alaska. Fire that burns the organic layer can trigger dramatic changes in the underlying permafrost, leading to accelerated ground thawing within a relatively short time. In this study, we addressed the following questions. (1) Which factors determine post-fire ground temperature dynamics in lowland and upland black spruce forests? (2) What levels of burn severity will cause irreversible permafrost degradation in these ecosystems?We evaluated these questions in a transient modeling–sensitivity analysis framework to assess the sensitivity of permafrost to climate, burn severity, soil organic layer thickness, and soil moisture content in lowland (with thick organic layers, ~80 cm) and upland (with thin organic layers, ~30 cm) black spruce ecosystems. The results indicate that climate warming accompanied by fire disturbance could significantly accelerate permafrost degradation. In upland black spruce forest, permafrost could completely degrade in an 18 m soil column within 120 years of a severe fire in an unchanging climate. In contrast, in a lowland black spruce forest, permafrost is more resilient to disturbance and can persist under a combination of moderate burn severity and climate warming. Still Image permafrost Alaska DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
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unknown |
topic |
Environmental Science |
spellingShingle |
Environmental Science E E Jafarov V E Romanovsky H Genet A D McGuire S S Marchenko Freeze-up time at (A) the upland black spruce forest site after 15 cm of the organic layer was removed and (B) the lowland black spruce forest site after 48 cm of the organic layer was removed |
topic_facet |
Environmental Science |
description |
Figure 10. Freeze-up time at (A) the upland black spruce forest site after 15 cm of the organic layer was removed and (B) the lowland black spruce forest site after 48 cm of the organic layer was removed. Here 0 is a year corresponding to the upper organic layer removal. Abstract Fire is an important factor controlling the composition and thickness of the organic layer in the black spruce forest ecosystems of interior Alaska. Fire that burns the organic layer can trigger dramatic changes in the underlying permafrost, leading to accelerated ground thawing within a relatively short time. In this study, we addressed the following questions. (1) Which factors determine post-fire ground temperature dynamics in lowland and upland black spruce forests? (2) What levels of burn severity will cause irreversible permafrost degradation in these ecosystems?We evaluated these questions in a transient modeling–sensitivity analysis framework to assess the sensitivity of permafrost to climate, burn severity, soil organic layer thickness, and soil moisture content in lowland (with thick organic layers, ~80 cm) and upland (with thin organic layers, ~30 cm) black spruce ecosystems. The results indicate that climate warming accompanied by fire disturbance could significantly accelerate permafrost degradation. In upland black spruce forest, permafrost could completely degrade in an 18 m soil column within 120 years of a severe fire in an unchanging climate. In contrast, in a lowland black spruce forest, permafrost is more resilient to disturbance and can persist under a combination of moderate burn severity and climate warming. |
format |
Still Image |
author |
E E Jafarov V E Romanovsky H Genet A D McGuire S S Marchenko |
author_facet |
E E Jafarov V E Romanovsky H Genet A D McGuire S S Marchenko |
author_sort |
E E Jafarov |
title |
Freeze-up time at (A) the upland black spruce forest site after 15 cm of the organic layer was removed and (B) the lowland black spruce forest site after 48 cm of the organic layer was removed |
title_short |
Freeze-up time at (A) the upland black spruce forest site after 15 cm of the organic layer was removed and (B) the lowland black spruce forest site after 48 cm of the organic layer was removed |
title_full |
Freeze-up time at (A) the upland black spruce forest site after 15 cm of the organic layer was removed and (B) the lowland black spruce forest site after 48 cm of the organic layer was removed |
title_fullStr |
Freeze-up time at (A) the upland black spruce forest site after 15 cm of the organic layer was removed and (B) the lowland black spruce forest site after 48 cm of the organic layer was removed |
title_full_unstemmed |
Freeze-up time at (A) the upland black spruce forest site after 15 cm of the organic layer was removed and (B) the lowland black spruce forest site after 48 cm of the organic layer was removed |
title_sort |
freeze-up time at (a) the upland black spruce forest site after 15 cm of the organic layer was removed and (b) the lowland black spruce forest site after 48 cm of the organic layer was removed |
publisher |
IOP Publishing |
publishDate |
2013 |
url |
https://dx.doi.org/10.6084/m9.figshare.1011805.v1 https://iop.figshare.com/articles/figure/_Freeze_up_time_at_A_the_upland_black_spruce_forest_site_after_15_cm_of_the_organic_layer_was_remove/1011805/1 |
genre |
permafrost Alaska |
genre_facet |
permafrost Alaska |
op_relation |
https://dx.doi.org/10.6084/m9.figshare.1011805 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.1011805.v1 https://doi.org/10.6084/m9.figshare.1011805 |
_version_ |
1766164540007907328 |