Spatial variation in concentration and sources of organic carbon in the Lena River, Siberia
Global warming in permafrost areas is expected to change fluxes of riverine organic carbon (OC) 22 to the Arctic Ocean. Here OC concentrations, stable carbon isotope signatures (δ13C) and carbon-23 nitrogen ratios (C/N) are presented from 22 sampling stations in the Lena River and 40 of its 24 trib...
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Naturhistoriska riksmuseet, Enheten för geovetenskap
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ftnrm:oai:DiVA.org:nrm-2462 2024-09-15T17:53:33+00:00 Spatial variation in concentration and sources of organic carbon in the Lena River, Siberia Kutscher, Liselott Mörth, Carl-Magnus Porcelli, Don Hirst, Catherine Maximov, Trofim Petrov, Roman Andersson, Per 2017 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2462 https://doi.org/10.1002/2017JG003858 eng eng Naturhistoriska riksmuseet, Enheten för geovetenskap Stockholm University University of Oxford North Eastern Federal University, Yakutsk, Russia New York Journal of Geophysical Research - Biogeosciences, 2169-8953, 2017, 122, orcid:0000-0002-1752-6469 http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2462 doi:10.1002/2017JG003858 info:eu-repo/semantics/openAccess DOC POC Lena River Geochemistry Geokemi Article in journal info:eu-repo/semantics/article text 2017 ftnrm https://doi.org/10.1002/2017JG003858 2024-07-05T03:00:55Z Global warming in permafrost areas is expected to change fluxes of riverine organic carbon (OC) 22 to the Arctic Ocean. Here OC concentrations, stable carbon isotope signatures (δ13C) and carbon-23 nitrogen ratios (C/N) are presented from 22 sampling stations in the Lena River and 40 of its 24 tributaries. Sampling was conducted during two expeditions: the first in July 2012 in the south 25 and southeastern region and the second in June 2013 in the northern region of the Lena basin. 26 The data showed significant spatial differences in concentrations and major sources of OC. Mean 27 sub-catchment slopes were correlated with OC concentrations, implying that mountainous areas 28 in general had lower concentrations than lowland areas. δ13C and C/N data from tributaries 29 originating in mountainous areas indicated that both dissolved and particulate OC (DOC and 30 POC) were mainly derived from soil organic matter (SOM). In contrast, tributaries originating in 31 lowland areas had larger contributions from fresh vegetation to DOC, while aquatically produced 32 OC was the major source of POC. We suggest that these differences in dominant sources 33 indicated differences in dominant flow pathways. Tributaries with larger influence of fresh 34 vegetation probably had surficial flow pathways, while tributaries with more SOM influence had 35 deeper water flow pathways. Thus, the future export of OC to the Arctic Ocean will likely be 36 controlled by changes in spatial patterns in hydroclimatology and the depth of the active layers 37 influencing the dominant water flow pathways in Arctic river basins. Article in Journal/Newspaper Arctic Ocean Global warming lena river permafrost Siberia Swedish Museum of Natural History: Publications (DiVA) Journal of Geophysical Research: Biogeosciences 122 8 1999 2016 |
institution |
Open Polar |
collection |
Swedish Museum of Natural History: Publications (DiVA) |
op_collection_id |
ftnrm |
language |
English |
topic |
DOC POC Lena River Geochemistry Geokemi |
spellingShingle |
DOC POC Lena River Geochemistry Geokemi Kutscher, Liselott Mörth, Carl-Magnus Porcelli, Don Hirst, Catherine Maximov, Trofim Petrov, Roman Andersson, Per Spatial variation in concentration and sources of organic carbon in the Lena River, Siberia |
topic_facet |
DOC POC Lena River Geochemistry Geokemi |
description |
Global warming in permafrost areas is expected to change fluxes of riverine organic carbon (OC) 22 to the Arctic Ocean. Here OC concentrations, stable carbon isotope signatures (δ13C) and carbon-23 nitrogen ratios (C/N) are presented from 22 sampling stations in the Lena River and 40 of its 24 tributaries. Sampling was conducted during two expeditions: the first in July 2012 in the south 25 and southeastern region and the second in June 2013 in the northern region of the Lena basin. 26 The data showed significant spatial differences in concentrations and major sources of OC. Mean 27 sub-catchment slopes were correlated with OC concentrations, implying that mountainous areas 28 in general had lower concentrations than lowland areas. δ13C and C/N data from tributaries 29 originating in mountainous areas indicated that both dissolved and particulate OC (DOC and 30 POC) were mainly derived from soil organic matter (SOM). In contrast, tributaries originating in 31 lowland areas had larger contributions from fresh vegetation to DOC, while aquatically produced 32 OC was the major source of POC. We suggest that these differences in dominant sources 33 indicated differences in dominant flow pathways. Tributaries with larger influence of fresh 34 vegetation probably had surficial flow pathways, while tributaries with more SOM influence had 35 deeper water flow pathways. Thus, the future export of OC to the Arctic Ocean will likely be 36 controlled by changes in spatial patterns in hydroclimatology and the depth of the active layers 37 influencing the dominant water flow pathways in Arctic river basins. |
format |
Article in Journal/Newspaper |
author |
Kutscher, Liselott Mörth, Carl-Magnus Porcelli, Don Hirst, Catherine Maximov, Trofim Petrov, Roman Andersson, Per |
author_facet |
Kutscher, Liselott Mörth, Carl-Magnus Porcelli, Don Hirst, Catherine Maximov, Trofim Petrov, Roman Andersson, Per |
author_sort |
Kutscher, Liselott |
title |
Spatial variation in concentration and sources of organic carbon in the Lena River, Siberia |
title_short |
Spatial variation in concentration and sources of organic carbon in the Lena River, Siberia |
title_full |
Spatial variation in concentration and sources of organic carbon in the Lena River, Siberia |
title_fullStr |
Spatial variation in concentration and sources of organic carbon in the Lena River, Siberia |
title_full_unstemmed |
Spatial variation in concentration and sources of organic carbon in the Lena River, Siberia |
title_sort |
spatial variation in concentration and sources of organic carbon in the lena river, siberia |
publisher |
Naturhistoriska riksmuseet, Enheten för geovetenskap |
publishDate |
2017 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2462 https://doi.org/10.1002/2017JG003858 |
genre |
Arctic Ocean Global warming lena river permafrost Siberia |
genre_facet |
Arctic Ocean Global warming lena river permafrost Siberia |
op_relation |
Journal of Geophysical Research - Biogeosciences, 2169-8953, 2017, 122, orcid:0000-0002-1752-6469 http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2462 doi:10.1002/2017JG003858 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2017JG003858 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
122 |
container_issue |
8 |
container_start_page |
1999 |
op_container_end_page |
2016 |
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1810429427656425472 |