Shallow carbon storage in ancient buried thermokarst in the South Kara Sea
Abstract Geophysical data from the South Kara Sea reveal U-shaped erosional structures buried beneath the 50–250 m deep seafloor of the continental shelf across an area of ~32 000 km2. These structures are interpreted as thermokarst, formed in ancient yedoma terrains during Quaternary interglacial p...
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ftdoajarticles:oai:doaj.org/article:be9c8b702e7347fcb64c72f95e2c50eb 2023-05-15T14:54:02+02:00 Shallow carbon storage in ancient buried thermokarst in the South Kara Sea Alexey Portnov Jürgen Mienert Monica Winsborrow Karin Andreassen Sunil Vadakkepuliyambatta Peter Semenov Valery Gataullin 2018-09-01T00:00:00Z https://doi.org/10.1038/s41598-018-32826-z https://doaj.org/article/be9c8b702e7347fcb64c72f95e2c50eb EN eng Nature Portfolio https://doi.org/10.1038/s41598-018-32826-z https://doaj.org/toc/2045-2322 doi:10.1038/s41598-018-32826-z 2045-2322 https://doaj.org/article/be9c8b702e7347fcb64c72f95e2c50eb Scientific Reports, Vol 8, Iss 1, Pp 1-8 (2018) Thermokarst Kara Sea Gas Hydrate Stability Zone (GHSZ) Yedoma Future Arctic Climate Medicine R Science Q article 2018 ftdoajarticles https://doi.org/10.1038/s41598-018-32826-z 2022-12-31T13:58:04Z Abstract Geophysical data from the South Kara Sea reveal U-shaped erosional structures buried beneath the 50–250 m deep seafloor of the continental shelf across an area of ~32 000 km2. These structures are interpreted as thermokarst, formed in ancient yedoma terrains during Quaternary interglacial periods. Based on comparison to modern yedoma terrains, we suggest that these thermokarst features could have stored approximately 0.5 to 8 Gt carbon during past climate warmings. In the deeper parts of the South Kara Sea (>220 m water depth) the paleo thermokarst structures lie within the present day gas hydrate stability zone, with low bottom water temperatures −1.8 oC) keeping the gas hydrate system in equilibrium. These thermokarst structures and their carbon reservoirs remain stable beneath a Quaternary sediment blanket, yet are potentially sensitive to future Arctic climate changes. Article in Journal/Newspaper Arctic Kara Sea Thermokarst Directory of Open Access Journals: DOAJ Articles Arctic Kara Sea Scientific Reports 8 1 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Thermokarst Kara Sea Gas Hydrate Stability Zone (GHSZ) Yedoma Future Arctic Climate Medicine R Science Q |
spellingShingle |
Thermokarst Kara Sea Gas Hydrate Stability Zone (GHSZ) Yedoma Future Arctic Climate Medicine R Science Q Alexey Portnov Jürgen Mienert Monica Winsborrow Karin Andreassen Sunil Vadakkepuliyambatta Peter Semenov Valery Gataullin Shallow carbon storage in ancient buried thermokarst in the South Kara Sea |
topic_facet |
Thermokarst Kara Sea Gas Hydrate Stability Zone (GHSZ) Yedoma Future Arctic Climate Medicine R Science Q |
description |
Abstract Geophysical data from the South Kara Sea reveal U-shaped erosional structures buried beneath the 50–250 m deep seafloor of the continental shelf across an area of ~32 000 km2. These structures are interpreted as thermokarst, formed in ancient yedoma terrains during Quaternary interglacial periods. Based on comparison to modern yedoma terrains, we suggest that these thermokarst features could have stored approximately 0.5 to 8 Gt carbon during past climate warmings. In the deeper parts of the South Kara Sea (>220 m water depth) the paleo thermokarst structures lie within the present day gas hydrate stability zone, with low bottom water temperatures −1.8 oC) keeping the gas hydrate system in equilibrium. These thermokarst structures and their carbon reservoirs remain stable beneath a Quaternary sediment blanket, yet are potentially sensitive to future Arctic climate changes. |
format |
Article in Journal/Newspaper |
author |
Alexey Portnov Jürgen Mienert Monica Winsborrow Karin Andreassen Sunil Vadakkepuliyambatta Peter Semenov Valery Gataullin |
author_facet |
Alexey Portnov Jürgen Mienert Monica Winsborrow Karin Andreassen Sunil Vadakkepuliyambatta Peter Semenov Valery Gataullin |
author_sort |
Alexey Portnov |
title |
Shallow carbon storage in ancient buried thermokarst in the South Kara Sea |
title_short |
Shallow carbon storage in ancient buried thermokarst in the South Kara Sea |
title_full |
Shallow carbon storage in ancient buried thermokarst in the South Kara Sea |
title_fullStr |
Shallow carbon storage in ancient buried thermokarst in the South Kara Sea |
title_full_unstemmed |
Shallow carbon storage in ancient buried thermokarst in the South Kara Sea |
title_sort |
shallow carbon storage in ancient buried thermokarst in the south kara sea |
publisher |
Nature Portfolio |
publishDate |
2018 |
url |
https://doi.org/10.1038/s41598-018-32826-z https://doaj.org/article/be9c8b702e7347fcb64c72f95e2c50eb |
geographic |
Arctic Kara Sea |
geographic_facet |
Arctic Kara Sea |
genre |
Arctic Kara Sea Thermokarst |
genre_facet |
Arctic Kara Sea Thermokarst |
op_source |
Scientific Reports, Vol 8, Iss 1, Pp 1-8 (2018) |
op_relation |
https://doi.org/10.1038/s41598-018-32826-z https://doaj.org/toc/2045-2322 doi:10.1038/s41598-018-32826-z 2045-2322 https://doaj.org/article/be9c8b702e7347fcb64c72f95e2c50eb |
op_doi |
https://doi.org/10.1038/s41598-018-32826-z |
container_title |
Scientific Reports |
container_volume |
8 |
container_issue |
1 |
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1766325726603116544 |