Seasonal variability of the surface ocean carbon cycle: A synthesis
Abstract The seasonal cycle is the dominant mode of variability in the air‐sea CO 2 flux in most regions of the global ocean, yet discrepancies between different seasonality estimates are rather large. As part of the Regional Carbon Cycle Assessment and Processes phase 2 project (RECCAP2), we synthe...
Published in: | Global Biogeochemical Cycles |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
Other Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2023
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Subjects: | |
Online Access: | https://hal.science/hal-04191390 https://hal.science/hal-04191390/document https://hal.science/hal-04191390/file/Global%20Biogeochemical%20Cycles%20-%202023%20-%20Rodgers.pdf https://doi.org/10.1029/2023gb007798 |
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ftceafr:oai:HAL:hal-04191390v1 |
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Open Polar |
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HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
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ftceafr |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Rodgers, Keith, B Schwinger, Jörg Fassbender, Andrea, J Landschützer, Peter Yamaguchi, Ryohei Frenzel, Hartmut Stein, Karl Müller, Jens, Daniel Goris, Nadine Sharma, Sahil Bushinsky, Seth Chau, Thi‐tuyet‐trang Gehlen, Marion Gallego, M. Angeles Gloege, Lucas Gregor, Luke Gruber, Nicolas Hauck, Judith Iida, Yosuke Ishii, Masao Keppler, Lydia Kim, Ji‐eun Schlunegger, Sarah Tjiputra, Jerry Toyama, Katsuya Vaittinada Ayar, Pradeebane Velo, Antón Seasonal variability of the surface ocean carbon cycle: A synthesis |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
Abstract The seasonal cycle is the dominant mode of variability in the air‐sea CO 2 flux in most regions of the global ocean, yet discrepancies between different seasonality estimates are rather large. As part of the Regional Carbon Cycle Assessment and Processes phase 2 project (RECCAP2), we synthesize surface ocean p CO 2 and air‐sea CO 2 flux seasonality from models and observation‐based estimates, focusing on both a present‐day climatology and decadal changes between the 1980s and 2010s. Four main findings emerge: First, global ocean biogeochemistry models (GOBMs) and observation‐based estimates ( p CO 2 products) of surface p CO 2 seasonality disagree in amplitude and phase, primarily due to discrepancies in the seasonal variability in surface DIC. Second, the seasonal cycle in p CO 2 has increased in amplitude over the last three decades in both p CO 2 products and GOBMs. Third, decadal increases in p CO 2 seasonal cycle amplitudes in subtropical biomes for both p CO 2 products and GOBMs are driven by increasing DIC concentrations stemming from the uptake of anthropogenic CO 2 (C ant ). In subpolar and Southern Ocean biomes, however, the seasonality change for GOBMs is dominated by C ant invasion, whereas for p CO 2 products an indeterminate combination of C ant invasion and climate change modulates the changes. Fourth, biome‐aggregated decadal changes in the amplitude of p CO 2 seasonal variability are largely detectable against both mapping uncertainty (reducible) and natural variability uncertainty (irreducible), but not at the gridpoint scale over much of the northern subpolar oceans and over the Southern Ocean, underscoring the importance of sustained high‐quality seasonally‐resolved measurements over these regions. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) NORCE Norwegian Research Center Extrèmes : Statistiques, Impacts et Régionalisation (ESTIMR) |
format |
Article in Journal/Newspaper |
author |
Rodgers, Keith, B Schwinger, Jörg Fassbender, Andrea, J Landschützer, Peter Yamaguchi, Ryohei Frenzel, Hartmut Stein, Karl Müller, Jens, Daniel Goris, Nadine Sharma, Sahil Bushinsky, Seth Chau, Thi‐tuyet‐trang Gehlen, Marion Gallego, M. Angeles Gloege, Lucas Gregor, Luke Gruber, Nicolas Hauck, Judith Iida, Yosuke Ishii, Masao Keppler, Lydia Kim, Ji‐eun Schlunegger, Sarah Tjiputra, Jerry Toyama, Katsuya Vaittinada Ayar, Pradeebane Velo, Antón |
author_facet |
Rodgers, Keith, B Schwinger, Jörg Fassbender, Andrea, J Landschützer, Peter Yamaguchi, Ryohei Frenzel, Hartmut Stein, Karl Müller, Jens, Daniel Goris, Nadine Sharma, Sahil Bushinsky, Seth Chau, Thi‐tuyet‐trang Gehlen, Marion Gallego, M. Angeles Gloege, Lucas Gregor, Luke Gruber, Nicolas Hauck, Judith Iida, Yosuke Ishii, Masao Keppler, Lydia Kim, Ji‐eun Schlunegger, Sarah Tjiputra, Jerry Toyama, Katsuya Vaittinada Ayar, Pradeebane Velo, Antón |
author_sort |
Rodgers, Keith, B |
title |
Seasonal variability of the surface ocean carbon cycle: A synthesis |
title_short |
Seasonal variability of the surface ocean carbon cycle: A synthesis |
title_full |
Seasonal variability of the surface ocean carbon cycle: A synthesis |
title_fullStr |
Seasonal variability of the surface ocean carbon cycle: A synthesis |
title_full_unstemmed |
Seasonal variability of the surface ocean carbon cycle: A synthesis |
title_sort |
seasonal variability of the surface ocean carbon cycle: a synthesis |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04191390 https://hal.science/hal-04191390/document https://hal.science/hal-04191390/file/Global%20Biogeochemical%20Cycles%20-%202023%20-%20Rodgers.pdf https://doi.org/10.1029/2023gb007798 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-04191390 Global Biogeochemical Cycles, In press, ⟨10.1029/2023gb007798⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2023gb007798 hal-04191390 https://hal.science/hal-04191390 https://hal.science/hal-04191390/document https://hal.science/hal-04191390/file/Global%20Biogeochemical%20Cycles%20-%202023%20-%20Rodgers.pdf doi:10.1029/2023gb007798 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2023gb007798 |
container_title |
Global Biogeochemical Cycles |
container_volume |
37 |
container_issue |
9 |
_version_ |
1779320370140020736 |
spelling |
ftceafr:oai:HAL:hal-04191390v1 2023-10-09T21:56:01+02:00 Seasonal variability of the surface ocean carbon cycle: A synthesis Rodgers, Keith, B Schwinger, Jörg Fassbender, Andrea, J Landschützer, Peter Yamaguchi, Ryohei Frenzel, Hartmut Stein, Karl Müller, Jens, Daniel Goris, Nadine Sharma, Sahil Bushinsky, Seth Chau, Thi‐tuyet‐trang Gehlen, Marion Gallego, M. Angeles Gloege, Lucas Gregor, Luke Gruber, Nicolas Hauck, Judith Iida, Yosuke Ishii, Masao Keppler, Lydia Kim, Ji‐eun Schlunegger, Sarah Tjiputra, Jerry Toyama, Katsuya Vaittinada Ayar, Pradeebane Velo, Antón Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) NORCE Norwegian Research Center Extrèmes : Statistiques, Impacts et Régionalisation (ESTIMR) 2023-08-23 https://hal.science/hal-04191390 https://hal.science/hal-04191390/document https://hal.science/hal-04191390/file/Global%20Biogeochemical%20Cycles%20-%202023%20-%20Rodgers.pdf https://doi.org/10.1029/2023gb007798 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2023gb007798 hal-04191390 https://hal.science/hal-04191390 https://hal.science/hal-04191390/document https://hal.science/hal-04191390/file/Global%20Biogeochemical%20Cycles%20-%202023%20-%20Rodgers.pdf doi:10.1029/2023gb007798 info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-04191390 Global Biogeochemical Cycles, In press, ⟨10.1029/2023gb007798⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2023 ftceafr https://doi.org/10.1029/2023gb007798 2023-09-20T16:27:59Z Abstract The seasonal cycle is the dominant mode of variability in the air‐sea CO 2 flux in most regions of the global ocean, yet discrepancies between different seasonality estimates are rather large. As part of the Regional Carbon Cycle Assessment and Processes phase 2 project (RECCAP2), we synthesize surface ocean p CO 2 and air‐sea CO 2 flux seasonality from models and observation‐based estimates, focusing on both a present‐day climatology and decadal changes between the 1980s and 2010s. Four main findings emerge: First, global ocean biogeochemistry models (GOBMs) and observation‐based estimates ( p CO 2 products) of surface p CO 2 seasonality disagree in amplitude and phase, primarily due to discrepancies in the seasonal variability in surface DIC. Second, the seasonal cycle in p CO 2 has increased in amplitude over the last three decades in both p CO 2 products and GOBMs. Third, decadal increases in p CO 2 seasonal cycle amplitudes in subtropical biomes for both p CO 2 products and GOBMs are driven by increasing DIC concentrations stemming from the uptake of anthropogenic CO 2 (C ant ). In subpolar and Southern Ocean biomes, however, the seasonality change for GOBMs is dominated by C ant invasion, whereas for p CO 2 products an indeterminate combination of C ant invasion and climate change modulates the changes. Fourth, biome‐aggregated decadal changes in the amplitude of p CO 2 seasonal variability are largely detectable against both mapping uncertainty (reducible) and natural variability uncertainty (irreducible), but not at the gridpoint scale over much of the northern subpolar oceans and over the Southern Ocean, underscoring the importance of sustained high‐quality seasonally‐resolved measurements over these regions. Article in Journal/Newspaper Southern Ocean HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Southern Ocean Global Biogeochemical Cycles 37 9 |