Particulate organic carbon and nitrogen export from major Arctic rivers
Author Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 30 (2016): 629–643, doi:10.1002/2015GB005351. Northern rivers con...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/8258 2023-05-15T14:46:07+02:00 Particulate organic carbon and nitrogen export from major Arctic rivers McClelland, James W. Holmes, Robert M. Peterson, Bruce J. Raymond, Peter A. Striegl, Robert Zhulidov, Alexander V. Zimov, Sergey A. Zimov, Nikita Tank, Suzanne E. Spencer, Robert G. M. Staples, Robin Gurtovaya, Tatiana Y. Griffin, Claire G. 2016-05-11 https://hdl.handle.net/1912/8258 en_US eng John Wiley & Sons https://doi.org/10.1002/2015GB005351 Global Biogeochemical Cycles 30 (2016): 629–643 https://hdl.handle.net/1912/8258 doi:10.1002/2015GB005351 Global Biogeochemical Cycles 30 (2016): 629–643 doi:10.1002/2015GB005351 Arctic River Carbon Nitrogen Watershed Export Article 2016 ftwhoas https://doi.org/10.1002/2015GB005351 2022-05-28T22:59:41Z Author Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 30 (2016): 629–643, doi:10.1002/2015GB005351. Northern rivers connect a land area of approximately 20.5 million km2 to the Arctic Ocean and surrounding seas. These rivers account for ~10% of global river discharge and transport massive quantities of dissolved and particulate materials that reflect watershed sources and impact biogeochemical cycling in the ocean. In this paper, multiyear data sets from a coordinated sampling program are used to characterize particulate organic carbon (POC) and particulate nitrogen (PN) export from the six largest rivers within the pan-Arctic watershed (Yenisey, Lena, Ob', Mackenzie, Yukon, Kolyma). Together, these rivers export an average of 3055 × 109 g of POC and 368 × 109 g of PN each year. Scaled up to the pan-Arctic watershed as a whole, fluvial export estimates increase to 5767 × 109 g and 695 × 109 g of POC and PN per year, respectively. POC export is substantially lower than dissolved organic carbon export by these rivers, whereas PN export is roughly equal to dissolved nitrogen export. Seasonal patterns in concentrations and source/composition indicators (C:N, δ13C, Δ14C, δ15N) are broadly similar among rivers, but distinct regional differences are also evident. For example, average radiocarbon ages of POC range from ~2000 (Ob') to ~5500 (Mackenzie) years before present. Rapid changes within the Arctic system as a consequence of global warming make it challenging to establish a contemporary baseline of fluvial export, but the results presented in this paper capture variability and quantify average conditions for nearly a decade at the beginning of the 21st century. National Science Foundation Grant Numbers: 0229302, 0732985; U.S. Geological Survey; Department of Indian and Northern Affairs 2016-11-11 Article in Journal/Newspaper Arctic Arctic Ocean Global warming Yukon Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Arctic Ocean Yukon Indian Kolyma ENVELOPE(161.000,161.000,69.500,69.500) Yenisey ENVELOPE(82.680,82.680,71.828,71.828) Global Biogeochemical Cycles 30 5 629 643 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Arctic River Carbon Nitrogen Watershed Export |
spellingShingle |
Arctic River Carbon Nitrogen Watershed Export McClelland, James W. Holmes, Robert M. Peterson, Bruce J. Raymond, Peter A. Striegl, Robert Zhulidov, Alexander V. Zimov, Sergey A. Zimov, Nikita Tank, Suzanne E. Spencer, Robert G. M. Staples, Robin Gurtovaya, Tatiana Y. Griffin, Claire G. Particulate organic carbon and nitrogen export from major Arctic rivers |
topic_facet |
Arctic River Carbon Nitrogen Watershed Export |
description |
Author Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 30 (2016): 629–643, doi:10.1002/2015GB005351. Northern rivers connect a land area of approximately 20.5 million km2 to the Arctic Ocean and surrounding seas. These rivers account for ~10% of global river discharge and transport massive quantities of dissolved and particulate materials that reflect watershed sources and impact biogeochemical cycling in the ocean. In this paper, multiyear data sets from a coordinated sampling program are used to characterize particulate organic carbon (POC) and particulate nitrogen (PN) export from the six largest rivers within the pan-Arctic watershed (Yenisey, Lena, Ob', Mackenzie, Yukon, Kolyma). Together, these rivers export an average of 3055 × 109 g of POC and 368 × 109 g of PN each year. Scaled up to the pan-Arctic watershed as a whole, fluvial export estimates increase to 5767 × 109 g and 695 × 109 g of POC and PN per year, respectively. POC export is substantially lower than dissolved organic carbon export by these rivers, whereas PN export is roughly equal to dissolved nitrogen export. Seasonal patterns in concentrations and source/composition indicators (C:N, δ13C, Δ14C, δ15N) are broadly similar among rivers, but distinct regional differences are also evident. For example, average radiocarbon ages of POC range from ~2000 (Ob') to ~5500 (Mackenzie) years before present. Rapid changes within the Arctic system as a consequence of global warming make it challenging to establish a contemporary baseline of fluvial export, but the results presented in this paper capture variability and quantify average conditions for nearly a decade at the beginning of the 21st century. National Science Foundation Grant Numbers: 0229302, 0732985; U.S. Geological Survey; Department of Indian and Northern Affairs 2016-11-11 |
format |
Article in Journal/Newspaper |
author |
McClelland, James W. Holmes, Robert M. Peterson, Bruce J. Raymond, Peter A. Striegl, Robert Zhulidov, Alexander V. Zimov, Sergey A. Zimov, Nikita Tank, Suzanne E. Spencer, Robert G. M. Staples, Robin Gurtovaya, Tatiana Y. Griffin, Claire G. |
author_facet |
McClelland, James W. Holmes, Robert M. Peterson, Bruce J. Raymond, Peter A. Striegl, Robert Zhulidov, Alexander V. Zimov, Sergey A. Zimov, Nikita Tank, Suzanne E. Spencer, Robert G. M. Staples, Robin Gurtovaya, Tatiana Y. Griffin, Claire G. |
author_sort |
McClelland, James W. |
title |
Particulate organic carbon and nitrogen export from major Arctic rivers |
title_short |
Particulate organic carbon and nitrogen export from major Arctic rivers |
title_full |
Particulate organic carbon and nitrogen export from major Arctic rivers |
title_fullStr |
Particulate organic carbon and nitrogen export from major Arctic rivers |
title_full_unstemmed |
Particulate organic carbon and nitrogen export from major Arctic rivers |
title_sort |
particulate organic carbon and nitrogen export from major arctic rivers |
publisher |
John Wiley & Sons |
publishDate |
2016 |
url |
https://hdl.handle.net/1912/8258 |
long_lat |
ENVELOPE(161.000,161.000,69.500,69.500) ENVELOPE(82.680,82.680,71.828,71.828) |
geographic |
Arctic Arctic Ocean Yukon Indian Kolyma Yenisey |
geographic_facet |
Arctic Arctic Ocean Yukon Indian Kolyma Yenisey |
genre |
Arctic Arctic Ocean Global warming Yukon |
genre_facet |
Arctic Arctic Ocean Global warming Yukon |
op_source |
Global Biogeochemical Cycles 30 (2016): 629–643 doi:10.1002/2015GB005351 |
op_relation |
https://doi.org/10.1002/2015GB005351 Global Biogeochemical Cycles 30 (2016): 629–643 https://hdl.handle.net/1912/8258 doi:10.1002/2015GB005351 |
op_doi |
https://doi.org/10.1002/2015GB005351 |
container_title |
Global Biogeochemical Cycles |
container_volume |
30 |
container_issue |
5 |
container_start_page |
629 |
op_container_end_page |
643 |
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1766317376791379968 |