Foraminifera Trace Anthropogenic CO2 in the NW Atlantic by 1950
The Northwest Atlantic is a region of major climate change over the twentieth century, affected by the weakening of the Atlantic meridional overturning circulation. To assess whether the ability of this region to absorb anthropogenic CO2 has been impacted by this change, we present the region\'...
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Online Access: | https://publications.hereon.de/id/38680 https://publications.hzg.de/id/38680 https://doi.org/10.1029/2019GL084965 |
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fthzgzmk:oai:publications.hereon.de:38680 2023-06-11T04:15:25+02:00 Foraminifera Trace Anthropogenic CO2 in the NW Atlantic by 1950 Mellon, S. Kienast, M. Algar, C. Menocal, P. Kienast, S. Marchitto, T. Moros, M. Thomas, H. 2019 https://publications.hereon.de/id/38680 https://publications.hzg.de/id/38680 https://doi.org/10.1029/2019GL084965 en eng AGU https://dx.doi.org/10.1029/2019GL084965 urn:issn:0094-8276 https://publications.hereon.de/id/38680 https://publications.hzg.de/id/38680 info:eu-repo/semantics/openAccess open_access oa_allgemein_hybrid issn:0094-8276 Mellon, S.; Kienast, M.; Algar, C.; Menocal, P.; Kienast, S.; Marchitto, T.; Moros, M.; Thomas, H.: Foraminifera Trace Anthropogenic CO2 in the NW Atlantic by 1950. In: Geophysical Research Letters. Vol. 46 (2019) 24, 14683 - 14691 . (DOI: /10.1029/2019GL084965) info:eu-repo/semantics/article Zeitschrift Artikel 2019 fthzgzmk https://doi.org/10.1029/2019GL084965 2023-05-28T23:25:00Z The Northwest Atlantic is a region of major climate change over the twentieth century, affected by the weakening of the Atlantic meridional overturning circulation. To assess whether the ability of this region to absorb anthropogenic CO2 has been impacted by this change, we present the region\'s first long‐term carbon isotope (δ13C) time series of fossil foraminifera spanning the past 4,000 years. These records reveal an unprecedented negative δ13C excursion driven by anthropogenic CO2 penetration into the surface ocean, the “Suess effect” signal. This signal (amplitude −0.45‰) emerges in 1950 CE ± 15 with a decrease rate of 0.009 ± 0.001‰/yr. This marine signal is ~30% of the atmospheric Suess effect and emerges over a century later. Based on current estimates of the ratio of δ13CDIC change to dissolved inorganic carbon change and limited constraints on surface ocean residence times, we calculate a mean anthropogenic CO2 uptake rate of 0.6 ± 0.2 μmol/(kg yr) from 1950 to 2005. Article in Journal/Newspaper Northwest Atlantic Hereon Publications (Helmholtz-Zentrum) Geophysical Research Letters 46 24 14683 14691 |
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Open Polar |
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Hereon Publications (Helmholtz-Zentrum) |
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language |
English |
description |
The Northwest Atlantic is a region of major climate change over the twentieth century, affected by the weakening of the Atlantic meridional overturning circulation. To assess whether the ability of this region to absorb anthropogenic CO2 has been impacted by this change, we present the region\'s first long‐term carbon isotope (δ13C) time series of fossil foraminifera spanning the past 4,000 years. These records reveal an unprecedented negative δ13C excursion driven by anthropogenic CO2 penetration into the surface ocean, the “Suess effect” signal. This signal (amplitude −0.45‰) emerges in 1950 CE ± 15 with a decrease rate of 0.009 ± 0.001‰/yr. This marine signal is ~30% of the atmospheric Suess effect and emerges over a century later. Based on current estimates of the ratio of δ13CDIC change to dissolved inorganic carbon change and limited constraints on surface ocean residence times, we calculate a mean anthropogenic CO2 uptake rate of 0.6 ± 0.2 μmol/(kg yr) from 1950 to 2005. |
format |
Article in Journal/Newspaper |
author |
Mellon, S. Kienast, M. Algar, C. Menocal, P. Kienast, S. Marchitto, T. Moros, M. Thomas, H. |
spellingShingle |
Mellon, S. Kienast, M. Algar, C. Menocal, P. Kienast, S. Marchitto, T. Moros, M. Thomas, H. Foraminifera Trace Anthropogenic CO2 in the NW Atlantic by 1950 |
author_facet |
Mellon, S. Kienast, M. Algar, C. Menocal, P. Kienast, S. Marchitto, T. Moros, M. Thomas, H. |
author_sort |
Mellon, S. |
title |
Foraminifera Trace Anthropogenic CO2 in the NW Atlantic by 1950 |
title_short |
Foraminifera Trace Anthropogenic CO2 in the NW Atlantic by 1950 |
title_full |
Foraminifera Trace Anthropogenic CO2 in the NW Atlantic by 1950 |
title_fullStr |
Foraminifera Trace Anthropogenic CO2 in the NW Atlantic by 1950 |
title_full_unstemmed |
Foraminifera Trace Anthropogenic CO2 in the NW Atlantic by 1950 |
title_sort |
foraminifera trace anthropogenic co2 in the nw atlantic by 1950 |
publisher |
AGU |
publishDate |
2019 |
url |
https://publications.hereon.de/id/38680 https://publications.hzg.de/id/38680 https://doi.org/10.1029/2019GL084965 |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
issn:0094-8276 Mellon, S.; Kienast, M.; Algar, C.; Menocal, P.; Kienast, S.; Marchitto, T.; Moros, M.; Thomas, H.: Foraminifera Trace Anthropogenic CO2 in the NW Atlantic by 1950. In: Geophysical Research Letters. Vol. 46 (2019) 24, 14683 - 14691 . (DOI: /10.1029/2019GL084965) |
op_relation |
https://dx.doi.org/10.1029/2019GL084965 urn:issn:0094-8276 https://publications.hereon.de/id/38680 https://publications.hzg.de/id/38680 |
op_rights |
info:eu-repo/semantics/openAccess open_access oa_allgemein_hybrid |
op_doi |
https://doi.org/10.1029/2019GL084965 |
container_title |
Geophysical Research Letters |
container_volume |
46 |
container_issue |
24 |
container_start_page |
14683 |
op_container_end_page |
14691 |
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1768372208190619648 |