Geochemical Features of Ground Ice from the Faddeevsky Peninsula Eastern Coast (Kotelny Island, East Siberian Arctic) as a Key to Understand Paleoenvironmental Conditions of Its Formation
Understanding paleoenvironmental conditions of the permafrost formation allows us to estimate the permafrost carbon pool and its behavior upon thawing in a changing climate. In order to classify different types of ground ice and to reconstruct paleoenvironments, we examined geochemical data of ice w...
Published in: | Land |
---|---|
Main Authors: | , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute
2023
|
Subjects: | |
Online Access: | https://doi.org/10.3390/land12020324 |
id |
ftmdpi:oai:mdpi.com:/2073-445X/12/2/324/ |
---|---|
record_format |
openpolar |
spelling |
ftmdpi:oai:mdpi.com:/2073-445X/12/2/324/ 2023-08-20T04:04:19+02:00 Geochemical Features of Ground Ice from the Faddeevsky Peninsula Eastern Coast (Kotelny Island, East Siberian Arctic) as a Key to Understand Paleoenvironmental Conditions of Its Formation Anfisa Pismeniuk Petr Semenov Alexandra Veremeeva Wei He Anna Kozachek Sergei Malyshev Elizaveta Shatrova Anastasiia Lodochnikova Irina Streletskaya agris 2023-01-24 application/pdf https://doi.org/10.3390/land12020324 EN eng Multidisciplinary Digital Publishing Institute Land Systems and Global Change https://dx.doi.org/10.3390/land12020324 https://creativecommons.org/licenses/by/4.0/ Land; Volume 12; Issue 2; Pages: 324 ground ice ice wedges paleoclimate stable isotope dissolved organic matter methane Faddeevsky East Siberian Arctic Text 2023 ftmdpi https://doi.org/10.3390/land12020324 2023-08-01T08:27:40Z Understanding paleoenvironmental conditions of the permafrost formation allows us to estimate the permafrost carbon pool and its behavior upon thawing in a changing climate. In order to classify different types of ground ice and to reconstruct paleoenvironments, we examined geochemical data of ice wedges (IWs), tabular ground ice (TGI), and lens ice from the eastern coast of the Faddeevsky Peninsula (East Siberian Arctic). We analyzed isotope and ion composition, molecular composition of the gas phase, bulk biogeochemical parameters and dissolved organic matter (DOM) composition in ground ice samples. IWs formed in the Late Pleistocene under the coldest winter conditions and in the Holocene in proximity to the sea. The Holocene IWs have the highest mean d-excess (11–13‰) and a heavier isotope composition by an average of 6‰ compared with the Late Pleistocene IWs. We observe predominance of sea-salt fractions in ion composition of the Holocene IWs, while the Late Pleistocene IW shows enrichment in non-sea-salt component of SO42− (nssSO42−), which is probably associated with mineral leaching of deposits. Higher dissolved organic carbon (DOC) content in the Late Pleistocene IW (to 17.7 mg/L) may indicate more favorable vegetation conditions or lower degree of organic matter mineralization compared to Holocene IWs and TGI. CH4 concentrations were relatively low with a maximum value of 2.27 μmol/L. DOM composition, supposed to record the paleoenvironment of the freezing process, was for the first time tried as a biomarker for paleoenvironmental reconstructions of ground ice formation. Parallel factor (PARAFAC) analysis of EEM (Excitation-Emission matrix) of fluorescent DOM decomposes four components: P1–P3, which are related to allochthonous humic-like constituents, and P4, which is relevant to autochthonous fraction associated with microbial activity. The distribution of fluorescent DOM tracked the variability in both paleoclimate conditions of the IW formation (discriminating the Holocene and the Late Pleistocene ... Text Arctic Ice Kotelny Island permafrost wedge* MDPI Open Access Publishing Arctic Land 12 2 324 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
ground ice ice wedges paleoclimate stable isotope dissolved organic matter methane Faddeevsky East Siberian Arctic |
spellingShingle |
ground ice ice wedges paleoclimate stable isotope dissolved organic matter methane Faddeevsky East Siberian Arctic Anfisa Pismeniuk Petr Semenov Alexandra Veremeeva Wei He Anna Kozachek Sergei Malyshev Elizaveta Shatrova Anastasiia Lodochnikova Irina Streletskaya Geochemical Features of Ground Ice from the Faddeevsky Peninsula Eastern Coast (Kotelny Island, East Siberian Arctic) as a Key to Understand Paleoenvironmental Conditions of Its Formation |
topic_facet |
ground ice ice wedges paleoclimate stable isotope dissolved organic matter methane Faddeevsky East Siberian Arctic |
description |
Understanding paleoenvironmental conditions of the permafrost formation allows us to estimate the permafrost carbon pool and its behavior upon thawing in a changing climate. In order to classify different types of ground ice and to reconstruct paleoenvironments, we examined geochemical data of ice wedges (IWs), tabular ground ice (TGI), and lens ice from the eastern coast of the Faddeevsky Peninsula (East Siberian Arctic). We analyzed isotope and ion composition, molecular composition of the gas phase, bulk biogeochemical parameters and dissolved organic matter (DOM) composition in ground ice samples. IWs formed in the Late Pleistocene under the coldest winter conditions and in the Holocene in proximity to the sea. The Holocene IWs have the highest mean d-excess (11–13‰) and a heavier isotope composition by an average of 6‰ compared with the Late Pleistocene IWs. We observe predominance of sea-salt fractions in ion composition of the Holocene IWs, while the Late Pleistocene IW shows enrichment in non-sea-salt component of SO42− (nssSO42−), which is probably associated with mineral leaching of deposits. Higher dissolved organic carbon (DOC) content in the Late Pleistocene IW (to 17.7 mg/L) may indicate more favorable vegetation conditions or lower degree of organic matter mineralization compared to Holocene IWs and TGI. CH4 concentrations were relatively low with a maximum value of 2.27 μmol/L. DOM composition, supposed to record the paleoenvironment of the freezing process, was for the first time tried as a biomarker for paleoenvironmental reconstructions of ground ice formation. Parallel factor (PARAFAC) analysis of EEM (Excitation-Emission matrix) of fluorescent DOM decomposes four components: P1–P3, which are related to allochthonous humic-like constituents, and P4, which is relevant to autochthonous fraction associated with microbial activity. The distribution of fluorescent DOM tracked the variability in both paleoclimate conditions of the IW formation (discriminating the Holocene and the Late Pleistocene ... |
format |
Text |
author |
Anfisa Pismeniuk Petr Semenov Alexandra Veremeeva Wei He Anna Kozachek Sergei Malyshev Elizaveta Shatrova Anastasiia Lodochnikova Irina Streletskaya |
author_facet |
Anfisa Pismeniuk Petr Semenov Alexandra Veremeeva Wei He Anna Kozachek Sergei Malyshev Elizaveta Shatrova Anastasiia Lodochnikova Irina Streletskaya |
author_sort |
Anfisa Pismeniuk |
title |
Geochemical Features of Ground Ice from the Faddeevsky Peninsula Eastern Coast (Kotelny Island, East Siberian Arctic) as a Key to Understand Paleoenvironmental Conditions of Its Formation |
title_short |
Geochemical Features of Ground Ice from the Faddeevsky Peninsula Eastern Coast (Kotelny Island, East Siberian Arctic) as a Key to Understand Paleoenvironmental Conditions of Its Formation |
title_full |
Geochemical Features of Ground Ice from the Faddeevsky Peninsula Eastern Coast (Kotelny Island, East Siberian Arctic) as a Key to Understand Paleoenvironmental Conditions of Its Formation |
title_fullStr |
Geochemical Features of Ground Ice from the Faddeevsky Peninsula Eastern Coast (Kotelny Island, East Siberian Arctic) as a Key to Understand Paleoenvironmental Conditions of Its Formation |
title_full_unstemmed |
Geochemical Features of Ground Ice from the Faddeevsky Peninsula Eastern Coast (Kotelny Island, East Siberian Arctic) as a Key to Understand Paleoenvironmental Conditions of Its Formation |
title_sort |
geochemical features of ground ice from the faddeevsky peninsula eastern coast (kotelny island, east siberian arctic) as a key to understand paleoenvironmental conditions of its formation |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/land12020324 |
op_coverage |
agris |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice Kotelny Island permafrost wedge* |
genre_facet |
Arctic Ice Kotelny Island permafrost wedge* |
op_source |
Land; Volume 12; Issue 2; Pages: 324 |
op_relation |
Land Systems and Global Change https://dx.doi.org/10.3390/land12020324 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/land12020324 |
container_title |
Land |
container_volume |
12 |
container_issue |
2 |
container_start_page |
324 |
_version_ |
1774714705012588544 |