The northern European shelf as an increasing net sink for CO2
We developed a simple method to refine existing open-ocean maps and extend them towards different coastal seas. Using a multi-linear regression we produced monthly maps of surface ocean f CO 2 in the northern European coastal seas (the North Sea, the Baltic Sea, the Norwegian Coast and the Barents S...
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ftcopernicus:oai:publications.copernicus.org:bg82138 2023-05-15T15:38:46+02:00 The northern European shelf as an increasing net sink for CO2 Becker, Meike Olsen, Are Landschützer, Peter Omar, Abdirhaman Rehder, Gregor Rödenbeck, Christian Skjelvan, Ingunn 2021-02-15 application/pdf https://doi.org/10.5194/bg-18-1127-2021 https://bg.copernicus.org/articles/18/1127/2021/ eng eng doi:10.5194/bg-18-1127-2021 https://bg.copernicus.org/articles/18/1127/2021/ eISSN: 1726-4189 Text 2021 ftcopernicus https://doi.org/10.5194/bg-18-1127-2021 2021-02-22T17:22:15Z We developed a simple method to refine existing open-ocean maps and extend them towards different coastal seas. Using a multi-linear regression we produced monthly maps of surface ocean f CO 2 in the northern European coastal seas (the North Sea, the Baltic Sea, the Norwegian Coast and the Barents Sea) covering a time period from 1998 to 2016. A comparison with gridded Surface Ocean CO 2 Atlas (SOCAT) v5 data revealed mean biases and standard deviations of 0 ± 26 µatm in the North Sea, 0 ± 16 µatm along the Norwegian Coast, 0 ± 19 µatm in the Barents Sea and 2 ± 42 µatm in the Baltic Sea. We used these maps to investigate trends in f CO 2 , pH and air–sea CO 2 flux. The surface ocean f CO 2 trends are smaller than the atmospheric trend in most of the studied regions. The only exception to this is the western part of the North Sea, where sea surface f CO 2 increases by 2 µatm yr −1 , which is similar to the atmospheric trend. The Baltic Sea does not show a significant trend. Here, the variability was much larger than the expected trends. Consistently, the pH trends were smaller than expected for an increase in f CO 2 in pace with the rise of atmospheric CO 2 levels. The calculated air–sea CO 2 fluxes revealed that most regions were net sinks for CO 2 . Only the southern North Sea and the Baltic Sea emitted CO 2 to the atmosphere. Especially in the northern regions the sink strength increased during the studied period. Text Barents Sea Copernicus Publications: E-Journals Barents Sea Biogeosciences 18 3 1127 1147 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
We developed a simple method to refine existing open-ocean maps and extend them towards different coastal seas. Using a multi-linear regression we produced monthly maps of surface ocean f CO 2 in the northern European coastal seas (the North Sea, the Baltic Sea, the Norwegian Coast and the Barents Sea) covering a time period from 1998 to 2016. A comparison with gridded Surface Ocean CO 2 Atlas (SOCAT) v5 data revealed mean biases and standard deviations of 0 ± 26 µatm in the North Sea, 0 ± 16 µatm along the Norwegian Coast, 0 ± 19 µatm in the Barents Sea and 2 ± 42 µatm in the Baltic Sea. We used these maps to investigate trends in f CO 2 , pH and air–sea CO 2 flux. The surface ocean f CO 2 trends are smaller than the atmospheric trend in most of the studied regions. The only exception to this is the western part of the North Sea, where sea surface f CO 2 increases by 2 µatm yr −1 , which is similar to the atmospheric trend. The Baltic Sea does not show a significant trend. Here, the variability was much larger than the expected trends. Consistently, the pH trends were smaller than expected for an increase in f CO 2 in pace with the rise of atmospheric CO 2 levels. The calculated air–sea CO 2 fluxes revealed that most regions were net sinks for CO 2 . Only the southern North Sea and the Baltic Sea emitted CO 2 to the atmosphere. Especially in the northern regions the sink strength increased during the studied period. |
format |
Text |
author |
Becker, Meike Olsen, Are Landschützer, Peter Omar, Abdirhaman Rehder, Gregor Rödenbeck, Christian Skjelvan, Ingunn |
spellingShingle |
Becker, Meike Olsen, Are Landschützer, Peter Omar, Abdirhaman Rehder, Gregor Rödenbeck, Christian Skjelvan, Ingunn The northern European shelf as an increasing net sink for CO2 |
author_facet |
Becker, Meike Olsen, Are Landschützer, Peter Omar, Abdirhaman Rehder, Gregor Rödenbeck, Christian Skjelvan, Ingunn |
author_sort |
Becker, Meike |
title |
The northern European shelf as an increasing net sink for CO2 |
title_short |
The northern European shelf as an increasing net sink for CO2 |
title_full |
The northern European shelf as an increasing net sink for CO2 |
title_fullStr |
The northern European shelf as an increasing net sink for CO2 |
title_full_unstemmed |
The northern European shelf as an increasing net sink for CO2 |
title_sort |
northern european shelf as an increasing net sink for co2 |
publishDate |
2021 |
url |
https://doi.org/10.5194/bg-18-1127-2021 https://bg.copernicus.org/articles/18/1127/2021/ |
geographic |
Barents Sea |
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Barents Sea |
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Barents Sea |
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Barents Sea |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-18-1127-2021 https://bg.copernicus.org/articles/18/1127/2021/ |
op_doi |
https://doi.org/10.5194/bg-18-1127-2021 |
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Biogeosciences |
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18 |
container_issue |
3 |
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1127 |
op_container_end_page |
1147 |
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