Arctic Ocean CO2 uptake: an improved multiyear estimate of the air–sea CO2 flux incorporating chlorophyll a concentrations
We estimated monthly air–sea CO2 fluxes in the Arctic Ocean and its adjacent seas north of 60∘ N from 1997 to 2014. This was done by mapping partial pressure of CO2 in the surface water (pCO2w) using a self-organizing map (SOM) technique incorporating chlorophyll a concentration (Chl a), sea surface...
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
2018
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00006955 2023-05-15T14:51:34+02:00 Arctic Ocean CO2 uptake: an improved multiyear estimate of the air–sea CO2 flux incorporating chlorophyll a concentrations Yasunaka, Sayaka Siswanto, Eko Olsen, Are Hoppema, Mario Watanabe, Eiji Fransson, Agneta Chierici, Melissa Murata, Akihiko Lauvset, Siv K. Wanninkhof, Rik Takahashi, Taro Kosugi, Naohiro Omar, Abdirahman M. van Heuven, Steven Mathis, Jeremy T. 2018-03 electronic https://doi.org/10.5194/bg-15-1643-2018 https://noa.gwlb.de/receive/cop_mods_00006955 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006912/bg-15-1643-2018.pdf https://bg.copernicus.org/articles/15/1643/2018/bg-15-1643-2018.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-15-1643-2018 https://noa.gwlb.de/receive/cop_mods_00006955 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006912/bg-15-1643-2018.pdf https://bg.copernicus.org/articles/15/1643/2018/bg-15-1643-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/bg-15-1643-2018 2022-02-08T22:58:46Z We estimated monthly air–sea CO2 fluxes in the Arctic Ocean and its adjacent seas north of 60∘ N from 1997 to 2014. This was done by mapping partial pressure of CO2 in the surface water (pCO2w) using a self-organizing map (SOM) technique incorporating chlorophyll a concentration (Chl a), sea surface temperature, sea surface salinity, sea ice concentration, atmospheric CO2 mixing ratio, and geographical position. We applied new algorithms for extracting Chl a from satellite remote sensing reflectance with close examination of uncertainty of the obtained Chl a values. The overall relationship between pCO2w and Chl a was negative, whereas the relationship varied among seasons and regions. The addition of Chl a as a parameter in the SOM process enabled us to improve the estimate of pCO2w, particularly via better representation of its decline in spring, which resulted from biologically mediated pCO2w reduction. As a result of the inclusion of Chl a, the uncertainty in the CO2 flux estimate was reduced, with a net annual Arctic Ocean CO2 uptake of 180 ± 130 Tg C yr−1. Seasonal to interannual variation in the CO2 influx was also calculated. Article in Journal/Newspaper Arctic Arctic Ocean Sea ice Niedersächsisches Online-Archiv NOA Arctic Arctic Ocean Biogeosciences 15 6 1643 1661 |
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Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Yasunaka, Sayaka Siswanto, Eko Olsen, Are Hoppema, Mario Watanabe, Eiji Fransson, Agneta Chierici, Melissa Murata, Akihiko Lauvset, Siv K. Wanninkhof, Rik Takahashi, Taro Kosugi, Naohiro Omar, Abdirahman M. van Heuven, Steven Mathis, Jeremy T. Arctic Ocean CO2 uptake: an improved multiyear estimate of the air–sea CO2 flux incorporating chlorophyll a concentrations |
topic_facet |
article Verlagsveröffentlichung |
description |
We estimated monthly air–sea CO2 fluxes in the Arctic Ocean and its adjacent seas north of 60∘ N from 1997 to 2014. This was done by mapping partial pressure of CO2 in the surface water (pCO2w) using a self-organizing map (SOM) technique incorporating chlorophyll a concentration (Chl a), sea surface temperature, sea surface salinity, sea ice concentration, atmospheric CO2 mixing ratio, and geographical position. We applied new algorithms for extracting Chl a from satellite remote sensing reflectance with close examination of uncertainty of the obtained Chl a values. The overall relationship between pCO2w and Chl a was negative, whereas the relationship varied among seasons and regions. The addition of Chl a as a parameter in the SOM process enabled us to improve the estimate of pCO2w, particularly via better representation of its decline in spring, which resulted from biologically mediated pCO2w reduction. As a result of the inclusion of Chl a, the uncertainty in the CO2 flux estimate was reduced, with a net annual Arctic Ocean CO2 uptake of 180 ± 130 Tg C yr−1. Seasonal to interannual variation in the CO2 influx was also calculated. |
format |
Article in Journal/Newspaper |
author |
Yasunaka, Sayaka Siswanto, Eko Olsen, Are Hoppema, Mario Watanabe, Eiji Fransson, Agneta Chierici, Melissa Murata, Akihiko Lauvset, Siv K. Wanninkhof, Rik Takahashi, Taro Kosugi, Naohiro Omar, Abdirahman M. van Heuven, Steven Mathis, Jeremy T. |
author_facet |
Yasunaka, Sayaka Siswanto, Eko Olsen, Are Hoppema, Mario Watanabe, Eiji Fransson, Agneta Chierici, Melissa Murata, Akihiko Lauvset, Siv K. Wanninkhof, Rik Takahashi, Taro Kosugi, Naohiro Omar, Abdirahman M. van Heuven, Steven Mathis, Jeremy T. |
author_sort |
Yasunaka, Sayaka |
title |
Arctic Ocean CO2 uptake: an improved multiyear estimate of the air–sea CO2 flux incorporating chlorophyll a concentrations |
title_short |
Arctic Ocean CO2 uptake: an improved multiyear estimate of the air–sea CO2 flux incorporating chlorophyll a concentrations |
title_full |
Arctic Ocean CO2 uptake: an improved multiyear estimate of the air–sea CO2 flux incorporating chlorophyll a concentrations |
title_fullStr |
Arctic Ocean CO2 uptake: an improved multiyear estimate of the air–sea CO2 flux incorporating chlorophyll a concentrations |
title_full_unstemmed |
Arctic Ocean CO2 uptake: an improved multiyear estimate of the air–sea CO2 flux incorporating chlorophyll a concentrations |
title_sort |
arctic ocean co2 uptake: an improved multiyear estimate of the air–sea co2 flux incorporating chlorophyll a concentrations |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-15-1643-2018 https://noa.gwlb.de/receive/cop_mods_00006955 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006912/bg-15-1643-2018.pdf https://bg.copernicus.org/articles/15/1643/2018/bg-15-1643-2018.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-15-1643-2018 https://noa.gwlb.de/receive/cop_mods_00006955 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006912/bg-15-1643-2018.pdf https://bg.copernicus.org/articles/15/1643/2018/bg-15-1643-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/bg-15-1643-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
6 |
container_start_page |
1643 |
op_container_end_page |
1661 |
_version_ |
1766322703932850176 |