Multimolecular tracers of terrestrial carbon transfer across the pan-Arctic: 14C characteristics of sedimentary carbon components and their environmental controls
Distinguishing the sources, ages, and fate of various terrestrial organic carbon (OC) pools mobilized from heterogeneous Arctic landscapes is key to assessing climatic impacts on the fluvial release of carbon from permafrost. Through molecular 14C measurements, including novel analyses of suberin- a...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/328022 2023-07-23T04:16:55+02:00 Multimolecular tracers of terrestrial carbon transfer across the pan-Arctic: 14C characteristics of sedimentary carbon components and their environmental controls Feng, Xiaojuan Gustafsson, Örjan Holmes, R. Max Vonk, Jorien E. Van Dongen, Bart E. Semiletov, Igor P. Dudarev, Oleg V. Yunker, Mark B. Macdonald, Robie W. Wacker, Lukas Montluçon, Daniel B. Eglinton, Timothy I. Organic geochemistry NWO-VENI: Ancient organic matter that matters: The fate of Siberian Yedoma deposits 2015-11-01 image/pdf https://dspace.library.uu.nl/handle/1874/328022 en eng 0886-6236 https://dspace.library.uu.nl/handle/1874/328022 info:eu-repo/semantics/OpenAccess compound-specific radiocarbon analysis diacids lignin pan-arctic rivers plant wax lipids terrestrial carbon markers Global and Planetary Change Atmospheric Science Environmental Science(all) Environmental Chemistry Article 2015 ftunivutrecht 2023-07-02T01:37:43Z Distinguishing the sources, ages, and fate of various terrestrial organic carbon (OC) pools mobilized from heterogeneous Arctic landscapes is key to assessing climatic impacts on the fluvial release of carbon from permafrost. Through molecular 14C measurements, including novel analyses of suberin- and/or cutin-derived diacids (DAs) and hydroxy fatty acids (FAs), we compared the radiocarbon characteristics of a comprehensive suite of terrestrial markers (including plant wax lipids, cutin, suberin, lignin, and hydroxy phenols) in the sedimentary particles from nine major arctic and subarctic rivers in order to establish a benchmark assessment of the mobilization patterns of terrestrial OC pools across the pan-Arctic. Terrestrial lipids, including suberin-derived longer-chain DAs (C24,26,28), plant wax FAs (C24,26,28), and n-alkanes (C27,29,31), incorporated significant inputs of aged carbon, presumably from deeper soil horizons. Mobilization and translocation of these "old" terrestrial carbon components was dependent on nonlinear processes associated with permafrost distributions. By contrast, shorter-chain (C16,18) DAs and lignin phenols (as well as hydroxy phenols in rivers outside eastern Eurasian Arctic) were much more enriched in 14C, suggesting incorporation of relatively young carbon supplied by runoff processes from recent vegetation debris and surface layers. Furthermore, the radiocarbon content of terrestrial markers is heavily influenced by specific OC sources and degradation status. Overall, multitracer molecular 14C analysis sheds new light on the mobilization of terrestrial OC from arctic watersheds. Our findings of distinct ages for various terrestrial carbon components may aid in elucidating fate of different terrestrial OC pools in the face of increasing arctic permafrost thaw. Article in Journal/Newspaper Arctic permafrost Subarctic Utrecht University Repository Arctic |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
compound-specific radiocarbon analysis diacids lignin pan-arctic rivers plant wax lipids terrestrial carbon markers Global and Planetary Change Atmospheric Science Environmental Science(all) Environmental Chemistry |
spellingShingle |
compound-specific radiocarbon analysis diacids lignin pan-arctic rivers plant wax lipids terrestrial carbon markers Global and Planetary Change Atmospheric Science Environmental Science(all) Environmental Chemistry Feng, Xiaojuan Gustafsson, Örjan Holmes, R. Max Vonk, Jorien E. Van Dongen, Bart E. Semiletov, Igor P. Dudarev, Oleg V. Yunker, Mark B. Macdonald, Robie W. Wacker, Lukas Montluçon, Daniel B. Eglinton, Timothy I. Multimolecular tracers of terrestrial carbon transfer across the pan-Arctic: 14C characteristics of sedimentary carbon components and their environmental controls |
topic_facet |
compound-specific radiocarbon analysis diacids lignin pan-arctic rivers plant wax lipids terrestrial carbon markers Global and Planetary Change Atmospheric Science Environmental Science(all) Environmental Chemistry |
description |
Distinguishing the sources, ages, and fate of various terrestrial organic carbon (OC) pools mobilized from heterogeneous Arctic landscapes is key to assessing climatic impacts on the fluvial release of carbon from permafrost. Through molecular 14C measurements, including novel analyses of suberin- and/or cutin-derived diacids (DAs) and hydroxy fatty acids (FAs), we compared the radiocarbon characteristics of a comprehensive suite of terrestrial markers (including plant wax lipids, cutin, suberin, lignin, and hydroxy phenols) in the sedimentary particles from nine major arctic and subarctic rivers in order to establish a benchmark assessment of the mobilization patterns of terrestrial OC pools across the pan-Arctic. Terrestrial lipids, including suberin-derived longer-chain DAs (C24,26,28), plant wax FAs (C24,26,28), and n-alkanes (C27,29,31), incorporated significant inputs of aged carbon, presumably from deeper soil horizons. Mobilization and translocation of these "old" terrestrial carbon components was dependent on nonlinear processes associated with permafrost distributions. By contrast, shorter-chain (C16,18) DAs and lignin phenols (as well as hydroxy phenols in rivers outside eastern Eurasian Arctic) were much more enriched in 14C, suggesting incorporation of relatively young carbon supplied by runoff processes from recent vegetation debris and surface layers. Furthermore, the radiocarbon content of terrestrial markers is heavily influenced by specific OC sources and degradation status. Overall, multitracer molecular 14C analysis sheds new light on the mobilization of terrestrial OC from arctic watersheds. Our findings of distinct ages for various terrestrial carbon components may aid in elucidating fate of different terrestrial OC pools in the face of increasing arctic permafrost thaw. |
author2 |
Organic geochemistry NWO-VENI: Ancient organic matter that matters: The fate of Siberian Yedoma deposits |
format |
Article in Journal/Newspaper |
author |
Feng, Xiaojuan Gustafsson, Örjan Holmes, R. Max Vonk, Jorien E. Van Dongen, Bart E. Semiletov, Igor P. Dudarev, Oleg V. Yunker, Mark B. Macdonald, Robie W. Wacker, Lukas Montluçon, Daniel B. Eglinton, Timothy I. |
author_facet |
Feng, Xiaojuan Gustafsson, Örjan Holmes, R. Max Vonk, Jorien E. Van Dongen, Bart E. Semiletov, Igor P. Dudarev, Oleg V. Yunker, Mark B. Macdonald, Robie W. Wacker, Lukas Montluçon, Daniel B. Eglinton, Timothy I. |
author_sort |
Feng, Xiaojuan |
title |
Multimolecular tracers of terrestrial carbon transfer across the pan-Arctic: 14C characteristics of sedimentary carbon components and their environmental controls |
title_short |
Multimolecular tracers of terrestrial carbon transfer across the pan-Arctic: 14C characteristics of sedimentary carbon components and their environmental controls |
title_full |
Multimolecular tracers of terrestrial carbon transfer across the pan-Arctic: 14C characteristics of sedimentary carbon components and their environmental controls |
title_fullStr |
Multimolecular tracers of terrestrial carbon transfer across the pan-Arctic: 14C characteristics of sedimentary carbon components and their environmental controls |
title_full_unstemmed |
Multimolecular tracers of terrestrial carbon transfer across the pan-Arctic: 14C characteristics of sedimentary carbon components and their environmental controls |
title_sort |
multimolecular tracers of terrestrial carbon transfer across the pan-arctic: 14c characteristics of sedimentary carbon components and their environmental controls |
publishDate |
2015 |
url |
https://dspace.library.uu.nl/handle/1874/328022 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Subarctic |
genre_facet |
Arctic permafrost Subarctic |
op_relation |
0886-6236 https://dspace.library.uu.nl/handle/1874/328022 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772178058297475072 |