Fluvial carbon dioxide emission from the Lena River basin during the spring flood
Greenhouse gas (GHG) emission from inland waters of permafrost-affected regions is one of the key factors of circumpolar aquatic ecosystem response to climate warming and permafrost thaw. Riverine systems of central and eastern Siberia contribute a significant part of the water and carbon (C) export...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2021
|
Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-187742 https://doi.org/10.5194/bg-18-4919-2021 |
id |
ftumeauniv:oai:DiVA.org:umu-187742 |
---|---|
record_format |
openpolar |
spelling |
ftumeauniv:oai:DiVA.org:umu-187742 2023-10-09T21:49:01+02:00 Fluvial carbon dioxide emission from the Lena River basin during the spring flood Vorobyev, Sergey N. Karlsson, Jan Kolesnichenko, Yuri Y. Korets, Mikhail A. Pokrovsky, Oleg S. 2021 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-187742 https://doi.org/10.5194/bg-18-4919-2021 eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap BIO-GEO-CLIM Laboratory, Tomsk State University, Tomsk, Russian Federation V.N. Sukachev Institute of Forest of the Siberian Branch of Russian Academy of Sciences, Separated Department of the KSC SB RAS, Krasnoyarsk, Russian Federation Geosciences and Environment Toulouse, UMR 5563 CNRS, 14 Avenue Edouard Belin, Toulouse, France; N. Laverov Federal Center for Integrated Arctic Research, Russian Academy of Sciences, Arkhangelsk, Russian Federation Biogeosciences, 1726-4170, 2021, 18:17, s. 4919-4936 orcid:0000-0001-5730-0694 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-187742 doi:10.5194/bg-18-4919-2021 ISI:000695648900001 Scopus 2-s2.0-85114822522 info:eu-repo/semantics/openAccess Climate Research Klimatforskning Article in journal info:eu-repo/semantics/article text 2021 ftumeauniv https://doi.org/10.5194/bg-18-4919-2021 2023-09-22T13:59:40Z Greenhouse gas (GHG) emission from inland waters of permafrost-affected regions is one of the key factors of circumpolar aquatic ecosystem response to climate warming and permafrost thaw. Riverine systems of central and eastern Siberia contribute a significant part of the water and carbon (C) export to the Arctic Ocean, yet their C exchange with the atmosphere remains poorly known due to lack of in situ GHG concentration and emission estimates. Here we present the results of continuous in situ pCO2 measurements over a 2600 km transect of the Lena River main stem and lower reaches of 20 major tributaries (together representing a watershed area of 1 661 000 km2, 66 % of the Lena's basin), conducted at the peak of the spring flood. The pCO2 in the Lena (range 400-1400 μatm) and tributaries (range 400-1600 μatm) remained generally stable (within ca. 20 %) over the night-day period and across the river channels. The pCO2 in tributaries increased northward with mean annual temperature decrease and permafrost increase; this change was positively correlated with C stock in soil, the proportion of deciduous needleleaf forest, and the riparian vegetation. Based on gas transfer coefficients obtained from rivers of the Siberian permafrost zone (kCombining double low line4.46 md-1), we calculated CO2 emission for the main stem and tributaries. Typical fluxes ranged from 1 to 2 gCm-2d-1 (>99 % CO2, <1 % CH4), which is comparable with CO2 emission measured in the Kolyma, Yukon, and Mackenzie rivers and permafrost-affected rivers in western Siberia. The areal C emissions from lotic waters of the Lena watershed were quantified by taking into account the total area of permanent and seasonal water of the Lena basin (28 000 km2 ). Assuming 6 months of the year to be an open water period with no emission under ice, the annual C emission from the whole Lena basin is estimated as 8.3±2.5 TgCyr-1, which is comparable to the DOC and dissolved inorganic carbon (DIC) lateral export to the Arctic Ocean. Article in Journal/Newspaper Arctic Arctic Ocean Ice lena river permafrost Siberia Yukon Umeå University: Publications (DiVA) Arctic Arctic Ocean Kolyma ENVELOPE(161.000,161.000,69.500,69.500) Yukon Biogeosciences 18 17 4919 4936 |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
Climate Research Klimatforskning |
spellingShingle |
Climate Research Klimatforskning Vorobyev, Sergey N. Karlsson, Jan Kolesnichenko, Yuri Y. Korets, Mikhail A. Pokrovsky, Oleg S. Fluvial carbon dioxide emission from the Lena River basin during the spring flood |
topic_facet |
Climate Research Klimatforskning |
description |
Greenhouse gas (GHG) emission from inland waters of permafrost-affected regions is one of the key factors of circumpolar aquatic ecosystem response to climate warming and permafrost thaw. Riverine systems of central and eastern Siberia contribute a significant part of the water and carbon (C) export to the Arctic Ocean, yet their C exchange with the atmosphere remains poorly known due to lack of in situ GHG concentration and emission estimates. Here we present the results of continuous in situ pCO2 measurements over a 2600 km transect of the Lena River main stem and lower reaches of 20 major tributaries (together representing a watershed area of 1 661 000 km2, 66 % of the Lena's basin), conducted at the peak of the spring flood. The pCO2 in the Lena (range 400-1400 μatm) and tributaries (range 400-1600 μatm) remained generally stable (within ca. 20 %) over the night-day period and across the river channels. The pCO2 in tributaries increased northward with mean annual temperature decrease and permafrost increase; this change was positively correlated with C stock in soil, the proportion of deciduous needleleaf forest, and the riparian vegetation. Based on gas transfer coefficients obtained from rivers of the Siberian permafrost zone (kCombining double low line4.46 md-1), we calculated CO2 emission for the main stem and tributaries. Typical fluxes ranged from 1 to 2 gCm-2d-1 (>99 % CO2, <1 % CH4), which is comparable with CO2 emission measured in the Kolyma, Yukon, and Mackenzie rivers and permafrost-affected rivers in western Siberia. The areal C emissions from lotic waters of the Lena watershed were quantified by taking into account the total area of permanent and seasonal water of the Lena basin (28 000 km2 ). Assuming 6 months of the year to be an open water period with no emission under ice, the annual C emission from the whole Lena basin is estimated as 8.3±2.5 TgCyr-1, which is comparable to the DOC and dissolved inorganic carbon (DIC) lateral export to the Arctic Ocean. |
format |
Article in Journal/Newspaper |
author |
Vorobyev, Sergey N. Karlsson, Jan Kolesnichenko, Yuri Y. Korets, Mikhail A. Pokrovsky, Oleg S. |
author_facet |
Vorobyev, Sergey N. Karlsson, Jan Kolesnichenko, Yuri Y. Korets, Mikhail A. Pokrovsky, Oleg S. |
author_sort |
Vorobyev, Sergey N. |
title |
Fluvial carbon dioxide emission from the Lena River basin during the spring flood |
title_short |
Fluvial carbon dioxide emission from the Lena River basin during the spring flood |
title_full |
Fluvial carbon dioxide emission from the Lena River basin during the spring flood |
title_fullStr |
Fluvial carbon dioxide emission from the Lena River basin during the spring flood |
title_full_unstemmed |
Fluvial carbon dioxide emission from the Lena River basin during the spring flood |
title_sort |
fluvial carbon dioxide emission from the lena river basin during the spring flood |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2021 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-187742 https://doi.org/10.5194/bg-18-4919-2021 |
long_lat |
ENVELOPE(161.000,161.000,69.500,69.500) |
geographic |
Arctic Arctic Ocean Kolyma Yukon |
geographic_facet |
Arctic Arctic Ocean Kolyma Yukon |
genre |
Arctic Arctic Ocean Ice lena river permafrost Siberia Yukon |
genre_facet |
Arctic Arctic Ocean Ice lena river permafrost Siberia Yukon |
op_relation |
Biogeosciences, 1726-4170, 2021, 18:17, s. 4919-4936 orcid:0000-0001-5730-0694 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-187742 doi:10.5194/bg-18-4919-2021 ISI:000695648900001 Scopus 2-s2.0-85114822522 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-18-4919-2021 |
container_title |
Biogeosciences |
container_volume |
18 |
container_issue |
17 |
container_start_page |
4919 |
op_container_end_page |
4936 |
_version_ |
1779312049971527680 |