Degradation of Arable Soils in Central Yakutia: Negative Consequences of Global Warming for Yedoma Landscapes
Global warming, which is especially intensive (up to 0.08°C yr−1) in permafrost area of Central Yakutia, has dramatic consequences for scarce arable land resources in this region. In Yedoma landscapes, intense permafrost thawing on arable fields unprotected by forest vegetation transforms the surfac...
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2021
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Online Access: | https://doi.org/10.3389/feart.2021.683730 https://doaj.org/article/d0afd8efa42740dc8ad0415246ee35d4 |
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ftdoajarticles:oai:doaj.org/article:d0afd8efa42740dc8ad0415246ee35d4 2023-05-15T16:37:10+02:00 Degradation of Arable Soils in Central Yakutia: Negative Consequences of Global Warming for Yedoma Landscapes Roman Desyatkin Nikolai Filippov Alexey Desyatkin Dmitry Konyushkov Sergey Goryachkin 2021-09-01T00:00:00Z https://doi.org/10.3389/feart.2021.683730 https://doaj.org/article/d0afd8efa42740dc8ad0415246ee35d4 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/feart.2021.683730/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2021.683730 https://doaj.org/article/d0afd8efa42740dc8ad0415246ee35d4 Frontiers in Earth Science, Vol 9 (2021) permafrost thawing abandoned arable land Cambic Turbic Cryosols Calcic Stagnic Solonetzes thermokarst formation boreal forest zone Science Q article 2021 ftdoajarticles https://doi.org/10.3389/feart.2021.683730 2022-12-31T12:35:48Z Global warming, which is especially intensive (up to 0.08°C yr−1) in permafrost area of Central Yakutia, has dramatic consequences for scarce arable land resources in this region. In Yedoma landscapes, intense permafrost thawing on arable fields unprotected by forest vegetation transforms the surface microtopography with the formation of residual thermokarst mounds (byllars) of 6–10 m in diameter surrounded by a polygonal network of hollows of 0.3–1.5 m in depth above melting ice wedges. This process also takes place on former croplands abandoned in the recent decades because of socioeconomic reasons. It is accompanied by a significant transformation of the previously highly likely homogeneous soil cover composed of Cambic Turbic Cryosols (Sodic) into differentiated complexes of permafrost-affected Stagnic Cambisols or Calcic Solonetzes (Turbic) on the mounds and Calcic Stagnic Solonetzes (Turbic) in the microlows. Surface soil horizons on the mounds have a strongly to very strongly alkaline reaction (pH 8.5–9.5) and low (<2%) organic carbon content; a wavy line of effervescence is found at a depth of 15–30 cm. Soils in the microlows have a close to neutral reaction in the upper horizons (pH 6.2–7.5); higher organic carbon content (2–3%); more pronounced textural differentiation of the profile with the formation of typical natric Btn and, in some cases, overlying eluvial E horizons; deeper (50–60 cm) line of effervescence; and clear stagnic features in the lower part of the profile. In the case of shallow embedding by ice wedge, the lowermost part of the soil in the microlow is characterized by the low bulk density (1.04 g cm−3) because of the appearance of hollows after thawing of the ice-rich transient layer and melting of the top of ice wedges. This may be indicative of the further soil subsidence in the future and the appearance of initial thermokarst lakes (dyuedya) within the Yedoma terrain with its transformation into the alas type of landscape. Rapid thermokarst-driven development of microtopography ... Article in Journal/Newspaper Ice permafrost Thermokarst wedge* Yakutia Directory of Open Access Journals: DOAJ Articles Frontiers in Earth Science 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
permafrost thawing abandoned arable land Cambic Turbic Cryosols Calcic Stagnic Solonetzes thermokarst formation boreal forest zone Science Q |
spellingShingle |
permafrost thawing abandoned arable land Cambic Turbic Cryosols Calcic Stagnic Solonetzes thermokarst formation boreal forest zone Science Q Roman Desyatkin Nikolai Filippov Alexey Desyatkin Dmitry Konyushkov Sergey Goryachkin Degradation of Arable Soils in Central Yakutia: Negative Consequences of Global Warming for Yedoma Landscapes |
topic_facet |
permafrost thawing abandoned arable land Cambic Turbic Cryosols Calcic Stagnic Solonetzes thermokarst formation boreal forest zone Science Q |
description |
Global warming, which is especially intensive (up to 0.08°C yr−1) in permafrost area of Central Yakutia, has dramatic consequences for scarce arable land resources in this region. In Yedoma landscapes, intense permafrost thawing on arable fields unprotected by forest vegetation transforms the surface microtopography with the formation of residual thermokarst mounds (byllars) of 6–10 m in diameter surrounded by a polygonal network of hollows of 0.3–1.5 m in depth above melting ice wedges. This process also takes place on former croplands abandoned in the recent decades because of socioeconomic reasons. It is accompanied by a significant transformation of the previously highly likely homogeneous soil cover composed of Cambic Turbic Cryosols (Sodic) into differentiated complexes of permafrost-affected Stagnic Cambisols or Calcic Solonetzes (Turbic) on the mounds and Calcic Stagnic Solonetzes (Turbic) in the microlows. Surface soil horizons on the mounds have a strongly to very strongly alkaline reaction (pH 8.5–9.5) and low (<2%) organic carbon content; a wavy line of effervescence is found at a depth of 15–30 cm. Soils in the microlows have a close to neutral reaction in the upper horizons (pH 6.2–7.5); higher organic carbon content (2–3%); more pronounced textural differentiation of the profile with the formation of typical natric Btn and, in some cases, overlying eluvial E horizons; deeper (50–60 cm) line of effervescence; and clear stagnic features in the lower part of the profile. In the case of shallow embedding by ice wedge, the lowermost part of the soil in the microlow is characterized by the low bulk density (1.04 g cm−3) because of the appearance of hollows after thawing of the ice-rich transient layer and melting of the top of ice wedges. This may be indicative of the further soil subsidence in the future and the appearance of initial thermokarst lakes (dyuedya) within the Yedoma terrain with its transformation into the alas type of landscape. Rapid thermokarst-driven development of microtopography ... |
format |
Article in Journal/Newspaper |
author |
Roman Desyatkin Nikolai Filippov Alexey Desyatkin Dmitry Konyushkov Sergey Goryachkin |
author_facet |
Roman Desyatkin Nikolai Filippov Alexey Desyatkin Dmitry Konyushkov Sergey Goryachkin |
author_sort |
Roman Desyatkin |
title |
Degradation of Arable Soils in Central Yakutia: Negative Consequences of Global Warming for Yedoma Landscapes |
title_short |
Degradation of Arable Soils in Central Yakutia: Negative Consequences of Global Warming for Yedoma Landscapes |
title_full |
Degradation of Arable Soils in Central Yakutia: Negative Consequences of Global Warming for Yedoma Landscapes |
title_fullStr |
Degradation of Arable Soils in Central Yakutia: Negative Consequences of Global Warming for Yedoma Landscapes |
title_full_unstemmed |
Degradation of Arable Soils in Central Yakutia: Negative Consequences of Global Warming for Yedoma Landscapes |
title_sort |
degradation of arable soils in central yakutia: negative consequences of global warming for yedoma landscapes |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/feart.2021.683730 https://doaj.org/article/d0afd8efa42740dc8ad0415246ee35d4 |
genre |
Ice permafrost Thermokarst wedge* Yakutia |
genre_facet |
Ice permafrost Thermokarst wedge* Yakutia |
op_source |
Frontiers in Earth Science, Vol 9 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/feart.2021.683730/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2021.683730 https://doaj.org/article/d0afd8efa42740dc8ad0415246ee35d4 |
op_doi |
https://doi.org/10.3389/feart.2021.683730 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
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1766027459857219584 |