Dissolved Organic Carbon (DOC) in Ground Ice on Northeastern Tibetan Plateau
Ground ice in permafrost stores substantial amounts of dissolved organic carbon (DOC) upon thaw, which may perpetuate a carbon feedback in permafrost regions, yet little is known to date about the dynamics of DOC and source variability of ground ice on the Tibetan Plateau. Here, the high-resolution...
Published in: | Frontiers in Earth Science |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Frontiers Media SA
2022
|
Subjects: | |
Online Access: | http://dx.doi.org/10.3389/feart.2022.782013 https://www.frontiersin.org/articles/10.3389/feart.2022.782013/full |
id |
crfrontiers:10.3389/feart.2022.782013 |
---|---|
record_format |
openpolar |
spelling |
crfrontiers:10.3389/feart.2022.782013 2024-02-11T10:04:38+01:00 Dissolved Organic Carbon (DOC) in Ground Ice on Northeastern Tibetan Plateau Yang, Yuzhong Guo, Xiaoyan Wang, Qingfeng Jin, Huijun Yun, Hanbo Wu, Qingbai 2022 http://dx.doi.org/10.3389/feart.2022.782013 https://www.frontiersin.org/articles/10.3389/feart.2022.782013/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Earth Science volume 10 ISSN 2296-6463 General Earth and Planetary Sciences journal-article 2022 crfrontiers https://doi.org/10.3389/feart.2022.782013 2024-01-26T10:00:27Z Ground ice in permafrost stores substantial amounts of dissolved organic carbon (DOC) upon thaw, which may perpetuate a carbon feedback in permafrost regions, yet little is known to date about the dynamics of DOC and source variability of ground ice on the Tibetan Plateau. Here, the high-resolution data of DOC in ground ice (4.8 m in depth) from two permafrost profiles on the Northeastern Tibetan Plateau (NETP) were firstly presented. We quantified the DOC concentrations (mean: 9.7–21.5 mg/L) of ground ice and revealed sizeable—by a factor of 7.0–36.0—enrichment of the ground ice relative to the other water elements on the TP. Results indicated remarkable depth differences in the DOC of ground ice, suggestive of diverse sources of DOC and different sequestration processes of DOC into ice during permafrost evolution. Combined with DOC and carbon isotopes (δ13CDOC), we clarified that decomposition of soil organic matter and leaching of DOC from organic layers and surrounding permafrost sediments are the important carbon sources of ground ice. The DOC sequestration of ground ice in the upper layers was related to the active layer hydrology and freeze–thaw cycle. However, the permafrost evolution controlled the decomposition of organic carbon and sequestration of DOC in the deep layers. A conceptual model clearly illustrated the dynamics of DOC in ground ice and suggested a significant impact on the carbon cycle on the NETP. The first attempt to explore the DOC in ground ice on the NETP is important and effective for further understanding of carbon cycle under permafrost degradation on the Tibetan Plateau. Article in Journal/Newspaper Ice permafrost Frontiers (Publisher) Frontiers in Earth Science 10 |
institution |
Open Polar |
collection |
Frontiers (Publisher) |
op_collection_id |
crfrontiers |
language |
unknown |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Yang, Yuzhong Guo, Xiaoyan Wang, Qingfeng Jin, Huijun Yun, Hanbo Wu, Qingbai Dissolved Organic Carbon (DOC) in Ground Ice on Northeastern Tibetan Plateau |
topic_facet |
General Earth and Planetary Sciences |
description |
Ground ice in permafrost stores substantial amounts of dissolved organic carbon (DOC) upon thaw, which may perpetuate a carbon feedback in permafrost regions, yet little is known to date about the dynamics of DOC and source variability of ground ice on the Tibetan Plateau. Here, the high-resolution data of DOC in ground ice (4.8 m in depth) from two permafrost profiles on the Northeastern Tibetan Plateau (NETP) were firstly presented. We quantified the DOC concentrations (mean: 9.7–21.5 mg/L) of ground ice and revealed sizeable—by a factor of 7.0–36.0—enrichment of the ground ice relative to the other water elements on the TP. Results indicated remarkable depth differences in the DOC of ground ice, suggestive of diverse sources of DOC and different sequestration processes of DOC into ice during permafrost evolution. Combined with DOC and carbon isotopes (δ13CDOC), we clarified that decomposition of soil organic matter and leaching of DOC from organic layers and surrounding permafrost sediments are the important carbon sources of ground ice. The DOC sequestration of ground ice in the upper layers was related to the active layer hydrology and freeze–thaw cycle. However, the permafrost evolution controlled the decomposition of organic carbon and sequestration of DOC in the deep layers. A conceptual model clearly illustrated the dynamics of DOC in ground ice and suggested a significant impact on the carbon cycle on the NETP. The first attempt to explore the DOC in ground ice on the NETP is important and effective for further understanding of carbon cycle under permafrost degradation on the Tibetan Plateau. |
format |
Article in Journal/Newspaper |
author |
Yang, Yuzhong Guo, Xiaoyan Wang, Qingfeng Jin, Huijun Yun, Hanbo Wu, Qingbai |
author_facet |
Yang, Yuzhong Guo, Xiaoyan Wang, Qingfeng Jin, Huijun Yun, Hanbo Wu, Qingbai |
author_sort |
Yang, Yuzhong |
title |
Dissolved Organic Carbon (DOC) in Ground Ice on Northeastern Tibetan Plateau |
title_short |
Dissolved Organic Carbon (DOC) in Ground Ice on Northeastern Tibetan Plateau |
title_full |
Dissolved Organic Carbon (DOC) in Ground Ice on Northeastern Tibetan Plateau |
title_fullStr |
Dissolved Organic Carbon (DOC) in Ground Ice on Northeastern Tibetan Plateau |
title_full_unstemmed |
Dissolved Organic Carbon (DOC) in Ground Ice on Northeastern Tibetan Plateau |
title_sort |
dissolved organic carbon (doc) in ground ice on northeastern tibetan plateau |
publisher |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/feart.2022.782013 https://www.frontiersin.org/articles/10.3389/feart.2022.782013/full |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Frontiers in Earth Science volume 10 ISSN 2296-6463 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/feart.2022.782013 |
container_title |
Frontiers in Earth Science |
container_volume |
10 |
_version_ |
1790601315096723456 |