Methane and Dissolved Organic Matter in the Ground Ice Samples from Central Yamal: Implications to Biogeochemical Cycling and Greenhouse Gas Emission
Permafrost thawing leads to mobilization of the vast carbon pool into modern biogeochemical cycling through the enhanced release of dissolved organic matter (DOM) and production of greenhouse gases (CO 2 and CH 4 ). In this work, we focus on the study of methane and DOM distribution and genesis in t...
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MDPI AG
2020
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Online Access: | https://doi.org/10.3390/geosciences10110450 https://doaj.org/article/1ced6b32b8c0439ebc20f5b47d1cbce3 |
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ftdoajarticles:oai:doaj.org/article:1ced6b32b8c0439ebc20f5b47d1cbce3 2023-05-15T15:10:00+02:00 Methane and Dissolved Organic Matter in the Ground Ice Samples from Central Yamal: Implications to Biogeochemical Cycling and Greenhouse Gas Emission Petr B. Semenov Anfisa A. Pismeniuk Sergei A. Malyshev Marina O. Leibman Irina D. Streletskaya Elizaveta V. Shatrova Alexander I. Kizyakov Boris G. Vanshtein 2020-11-01T00:00:00Z https://doi.org/10.3390/geosciences10110450 https://doaj.org/article/1ced6b32b8c0439ebc20f5b47d1cbce3 EN eng MDPI AG https://www.mdpi.com/2076-3263/10/11/450 https://doaj.org/toc/2076-3263 doi:10.3390/geosciences10110450 2076-3263 https://doaj.org/article/1ced6b32b8c0439ebc20f5b47d1cbce3 Geosciences, Vol 10, Iss 450, p 450 (2020) permafrost biogeochemical cycling climate change greenhouse gas emission dissolved organic matter ground ice Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.3390/geosciences10110450 2022-12-31T01:29:02Z Permafrost thawing leads to mobilization of the vast carbon pool into modern biogeochemical cycling through the enhanced release of dissolved organic matter (DOM) and production of greenhouse gases (CO 2 and CH 4 ). In this work, we focus on the study of methane and DOM distribution and genesis in the ground ice samples of thermodenudational exposure in the Central Yamal (Russian Arctic). We propose that the liberation of the ice-trapped CH 4 and generation of CO 2 by DOM mineralization are the earliest factors of atmospheric greenhouse gases emission as a result of permafrost thawing. The observed enormously “light ” isotope signatures of methane (δ 13 C < −80‰, δD < −390‰) found in the tabular ground ice units significantly divergent in morphology and localization within the exposuremay be related to subzero (cryogenic) carbonate reduction a as significant factor of the local methane enrichment. DOM is mainly formed (>88%) by biochemically refractory humic acids. Distribution of the labile protein-like DOM reflects the specific features of carbon and nitrogen cycles in the tabular ground ice and ice wedge samples. Tabular ground ice units are shown to be a significant source of methane and high quality organic matter as well as dissolved inorganic nitrogen (DIN). Ice wedges express a high variation in DOM composition and lability. Article in Journal/Newspaper Arctic Climate change Ice permafrost wedge* Directory of Open Access Journals: DOAJ Articles Arctic Geosciences 10 11 450 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
permafrost biogeochemical cycling climate change greenhouse gas emission dissolved organic matter ground ice Geology QE1-996.5 |
spellingShingle |
permafrost biogeochemical cycling climate change greenhouse gas emission dissolved organic matter ground ice Geology QE1-996.5 Petr B. Semenov Anfisa A. Pismeniuk Sergei A. Malyshev Marina O. Leibman Irina D. Streletskaya Elizaveta V. Shatrova Alexander I. Kizyakov Boris G. Vanshtein Methane and Dissolved Organic Matter in the Ground Ice Samples from Central Yamal: Implications to Biogeochemical Cycling and Greenhouse Gas Emission |
topic_facet |
permafrost biogeochemical cycling climate change greenhouse gas emission dissolved organic matter ground ice Geology QE1-996.5 |
description |
Permafrost thawing leads to mobilization of the vast carbon pool into modern biogeochemical cycling through the enhanced release of dissolved organic matter (DOM) and production of greenhouse gases (CO 2 and CH 4 ). In this work, we focus on the study of methane and DOM distribution and genesis in the ground ice samples of thermodenudational exposure in the Central Yamal (Russian Arctic). We propose that the liberation of the ice-trapped CH 4 and generation of CO 2 by DOM mineralization are the earliest factors of atmospheric greenhouse gases emission as a result of permafrost thawing. The observed enormously “light ” isotope signatures of methane (δ 13 C < −80‰, δD < −390‰) found in the tabular ground ice units significantly divergent in morphology and localization within the exposuremay be related to subzero (cryogenic) carbonate reduction a as significant factor of the local methane enrichment. DOM is mainly formed (>88%) by biochemically refractory humic acids. Distribution of the labile protein-like DOM reflects the specific features of carbon and nitrogen cycles in the tabular ground ice and ice wedge samples. Tabular ground ice units are shown to be a significant source of methane and high quality organic matter as well as dissolved inorganic nitrogen (DIN). Ice wedges express a high variation in DOM composition and lability. |
format |
Article in Journal/Newspaper |
author |
Petr B. Semenov Anfisa A. Pismeniuk Sergei A. Malyshev Marina O. Leibman Irina D. Streletskaya Elizaveta V. Shatrova Alexander I. Kizyakov Boris G. Vanshtein |
author_facet |
Petr B. Semenov Anfisa A. Pismeniuk Sergei A. Malyshev Marina O. Leibman Irina D. Streletskaya Elizaveta V. Shatrova Alexander I. Kizyakov Boris G. Vanshtein |
author_sort |
Petr B. Semenov |
title |
Methane and Dissolved Organic Matter in the Ground Ice Samples from Central Yamal: Implications to Biogeochemical Cycling and Greenhouse Gas Emission |
title_short |
Methane and Dissolved Organic Matter in the Ground Ice Samples from Central Yamal: Implications to Biogeochemical Cycling and Greenhouse Gas Emission |
title_full |
Methane and Dissolved Organic Matter in the Ground Ice Samples from Central Yamal: Implications to Biogeochemical Cycling and Greenhouse Gas Emission |
title_fullStr |
Methane and Dissolved Organic Matter in the Ground Ice Samples from Central Yamal: Implications to Biogeochemical Cycling and Greenhouse Gas Emission |
title_full_unstemmed |
Methane and Dissolved Organic Matter in the Ground Ice Samples from Central Yamal: Implications to Biogeochemical Cycling and Greenhouse Gas Emission |
title_sort |
methane and dissolved organic matter in the ground ice samples from central yamal: implications to biogeochemical cycling and greenhouse gas emission |
publisher |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/geosciences10110450 https://doaj.org/article/1ced6b32b8c0439ebc20f5b47d1cbce3 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Ice permafrost wedge* |
genre_facet |
Arctic Climate change Ice permafrost wedge* |
op_source |
Geosciences, Vol 10, Iss 450, p 450 (2020) |
op_relation |
https://www.mdpi.com/2076-3263/10/11/450 https://doaj.org/toc/2076-3263 doi:10.3390/geosciences10110450 2076-3263 https://doaj.org/article/1ced6b32b8c0439ebc20f5b47d1cbce3 |
op_doi |
https://doi.org/10.3390/geosciences10110450 |
container_title |
Geosciences |
container_volume |
10 |
container_issue |
11 |
container_start_page |
450 |
_version_ |
1766341080555454464 |