Increasing carbon inventory of the intermediate layers of the Arctic Ocean
Concentrations of dissolved inorganic carbon (DIC), total alkalinity (TA), nutrients, and oxygen in subsurface waters of the central Arctic Ocean have been investigated for conceivable time trends over the last two decades. Data from six cruises (1991–2011) that cover the Nansen, Amundsen, and Makar...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://hdl.handle.net/1956/19129 https://doi.org/10.1002/2013jc009514 |
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ftunivbergen:oai:bora.uib.no:1956/19129 2023-05-15T14:24:39+02:00 Increasing carbon inventory of the intermediate layers of the Arctic Ocean Ericson, Ylva Ulfsbo, Adam van Heuven, Steven Kattner, Gerhard Anderson, Leif G. 2014 application/pdf https://hdl.handle.net/1956/19129 https://doi.org/10.1002/2013jc009514 eng eng AGU Drivers of the marine CO2 system in the High Arctic - from the deep basins to the shallow fjords urn:issn:2169-9275 https://hdl.handle.net/1956/19129 https://doi.org/10.1002/2013jc009514 cristin:1441461 http://creativecommons.org/licenses/by-nc-nd/3.0/ Copyright 2014 The Authors Journal of Geophysical Research: Oceans 119 4 2312-2326 Peer reviewed Journal article 2014 ftunivbergen https://doi.org/10.1002/2013jc009514 2023-03-14T17:43:17Z Concentrations of dissolved inorganic carbon (DIC), total alkalinity (TA), nutrients, and oxygen in subsurface waters of the central Arctic Ocean have been investigated for conceivable time trends over the last two decades. Data from six cruises (1991–2011) that cover the Nansen, Amundsen, and Makarov Basins were included in this analysis. In waters deeper than 2000 m, no statistically significant trend could be observed for DIC, TA, phosphate, or nitrate, but a small rate of increase in apparent oxygen utilization (AOU) was noticeable. For the individual stations, differences in concentration of each property were computed between the mean concentrations in the Arctic Atlantic Water (AAW) or the upper Polar Deep Water (uPDW), i.e., between about 150 and 1400 m depth, and in the deep water (assumed invariable over time). In these shallower water layers, we observe significant above-zero time trends for DIC, in the range of 0.6–0.9 μmol kg-1 yr-1 (for AAW) and 0.4–0.6 μmol kg-1 yr-1 (for uPDW). No time trend in nutrients could be observed, indicating no change in the rate of organic matter mineralization within this depth range. Consequently, the buildup of DIC is attributed to increasing concentrations of anthropogenic carbon in the waters flowing into these depth layers of the Arctic Ocean. The resulting rate of increase of the column inventory of anthropogenic CO2 is estimated to be between 0.6 and 0.9 mol C m-2 yr-1, with distinct differences between basins. publishedVersion Article in Journal/Newspaper Arctic Arctic Arctic Ocean University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Arctic Ocean Journal of Geophysical Research: Oceans 119 4 2312 2326 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Concentrations of dissolved inorganic carbon (DIC), total alkalinity (TA), nutrients, and oxygen in subsurface waters of the central Arctic Ocean have been investigated for conceivable time trends over the last two decades. Data from six cruises (1991–2011) that cover the Nansen, Amundsen, and Makarov Basins were included in this analysis. In waters deeper than 2000 m, no statistically significant trend could be observed for DIC, TA, phosphate, or nitrate, but a small rate of increase in apparent oxygen utilization (AOU) was noticeable. For the individual stations, differences in concentration of each property were computed between the mean concentrations in the Arctic Atlantic Water (AAW) or the upper Polar Deep Water (uPDW), i.e., between about 150 and 1400 m depth, and in the deep water (assumed invariable over time). In these shallower water layers, we observe significant above-zero time trends for DIC, in the range of 0.6–0.9 μmol kg-1 yr-1 (for AAW) and 0.4–0.6 μmol kg-1 yr-1 (for uPDW). No time trend in nutrients could be observed, indicating no change in the rate of organic matter mineralization within this depth range. Consequently, the buildup of DIC is attributed to increasing concentrations of anthropogenic carbon in the waters flowing into these depth layers of the Arctic Ocean. The resulting rate of increase of the column inventory of anthropogenic CO2 is estimated to be between 0.6 and 0.9 mol C m-2 yr-1, with distinct differences between basins. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Ericson, Ylva Ulfsbo, Adam van Heuven, Steven Kattner, Gerhard Anderson, Leif G. |
spellingShingle |
Ericson, Ylva Ulfsbo, Adam van Heuven, Steven Kattner, Gerhard Anderson, Leif G. Increasing carbon inventory of the intermediate layers of the Arctic Ocean |
author_facet |
Ericson, Ylva Ulfsbo, Adam van Heuven, Steven Kattner, Gerhard Anderson, Leif G. |
author_sort |
Ericson, Ylva |
title |
Increasing carbon inventory of the intermediate layers of the Arctic Ocean |
title_short |
Increasing carbon inventory of the intermediate layers of the Arctic Ocean |
title_full |
Increasing carbon inventory of the intermediate layers of the Arctic Ocean |
title_fullStr |
Increasing carbon inventory of the intermediate layers of the Arctic Ocean |
title_full_unstemmed |
Increasing carbon inventory of the intermediate layers of the Arctic Ocean |
title_sort |
increasing carbon inventory of the intermediate layers of the arctic ocean |
publisher |
AGU |
publishDate |
2014 |
url |
https://hdl.handle.net/1956/19129 https://doi.org/10.1002/2013jc009514 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Arctic Ocean |
op_source |
Journal of Geophysical Research: Oceans 119 4 2312-2326 |
op_relation |
Drivers of the marine CO2 system in the High Arctic - from the deep basins to the shallow fjords urn:issn:2169-9275 https://hdl.handle.net/1956/19129 https://doi.org/10.1002/2013jc009514 cristin:1441461 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/3.0/ Copyright 2014 The Authors |
op_doi |
https://doi.org/10.1002/2013jc009514 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
119 |
container_issue |
4 |
container_start_page |
2312 |
op_container_end_page |
2326 |
_version_ |
1766297086273257472 |