Seasonal asymmetry in the evolution of surface ocean pCO2 and pH thermodynamic drivers and the influence on sea‐air CO2 flux
© The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Global Biogeochemical Cycles 32 (2018): 1476-1497, doi:10.1029/2017GB005855. It has become clear that anthropogenic carbon invasion into the surface...
Published in: | Global Biogeochemical Cycles |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
John Wiley & Sons
2018
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/10747 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/10747 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/10747 2023-05-15T17:51:58+02:00 Seasonal asymmetry in the evolution of surface ocean pCO2 and pH thermodynamic drivers and the influence on sea‐air CO2 flux Fassbender, Andrea Rodgers, Keith B. Palevsky, Hilary I. Sabine, Christopher L. 2018-10-11 https://hdl.handle.net/1912/10747 en_US eng John Wiley & Sons https://doi.org/10.1029/2017GB005855 Global Biogeochemical Cycles 32 (2018): 1476-1497 https://hdl.handle.net/1912/10747 doi:10.1029/2017GB005855 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Global Biogeochemical Cycles 32 (2018): 1476-1497 doi:10.1029/2017GB005855 Revelle Factor Carbon cycle Seasonal cycle CO2 fluxes Ocean acidification Article 2018 ftwhoas https://doi.org/10.1029/2017GB005855 2022-05-28T23:00:32Z © The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Global Biogeochemical Cycles 32 (2018): 1476-1497, doi:10.1029/2017GB005855. It has become clear that anthropogenic carbon invasion into the surface ocean drives changes in the seasonal cycles of carbon dioxide partial pressure (pCO2) and pH. However, it is not yet known whether the resulting sea‐air CO2 fluxes are symmetric in their seasonal expression. Here we consider a novel application of observational constraints and modeling inferences to test the hypothesis that changes in the ocean's Revelle factor facilitate a seasonally asymmetric response in pCO2 and the sea‐air CO2 flux. We use an analytical framework that builds on observed sea surface pCO2 variability for the modern era and incorporates transient dissolved inorganic carbon concentrations from an Earth system model. Our findings reveal asymmetric amplification of pCO2 and pH seasonal cycles by a factor of two (or more) above preindustrial levels under Representative Concentration Pathway 8.5. These changes are significantly larger than observed modes of interannual variability and are relevant to climate feedbacks associated with Revelle factor perturbations. Notably, this response occurs in the absence of changes to the seasonal cycle amplitudes of dissolved inorganic carbon, total alkalinity, salinity, and temperature, indicating that significant alteration of surface pCO2 can occur without modifying the physical or biological ocean state. This result challenges the historical paradigm that if the same amount of carbon and nutrients is entrained and subsequently exported, there is no impact on anthropogenic carbon uptake. Anticipation of seasonal asymmetries in the sea surface pCO2 and CO2 flux response to ocean carbon uptake over the 21st century may have important implications for carbon cycle feedbacks. Cooperative Institute for Climate Science Grant Number: NA17RJ2612; David and Lucile ... Article in Journal/Newspaper Ocean acidification Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Global Biogeochemical Cycles 32 10 1476 1497 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Revelle Factor Carbon cycle Seasonal cycle CO2 fluxes Ocean acidification |
spellingShingle |
Revelle Factor Carbon cycle Seasonal cycle CO2 fluxes Ocean acidification Fassbender, Andrea Rodgers, Keith B. Palevsky, Hilary I. Sabine, Christopher L. Seasonal asymmetry in the evolution of surface ocean pCO2 and pH thermodynamic drivers and the influence on sea‐air CO2 flux |
topic_facet |
Revelle Factor Carbon cycle Seasonal cycle CO2 fluxes Ocean acidification |
description |
© The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Global Biogeochemical Cycles 32 (2018): 1476-1497, doi:10.1029/2017GB005855. It has become clear that anthropogenic carbon invasion into the surface ocean drives changes in the seasonal cycles of carbon dioxide partial pressure (pCO2) and pH. However, it is not yet known whether the resulting sea‐air CO2 fluxes are symmetric in their seasonal expression. Here we consider a novel application of observational constraints and modeling inferences to test the hypothesis that changes in the ocean's Revelle factor facilitate a seasonally asymmetric response in pCO2 and the sea‐air CO2 flux. We use an analytical framework that builds on observed sea surface pCO2 variability for the modern era and incorporates transient dissolved inorganic carbon concentrations from an Earth system model. Our findings reveal asymmetric amplification of pCO2 and pH seasonal cycles by a factor of two (or more) above preindustrial levels under Representative Concentration Pathway 8.5. These changes are significantly larger than observed modes of interannual variability and are relevant to climate feedbacks associated with Revelle factor perturbations. Notably, this response occurs in the absence of changes to the seasonal cycle amplitudes of dissolved inorganic carbon, total alkalinity, salinity, and temperature, indicating that significant alteration of surface pCO2 can occur without modifying the physical or biological ocean state. This result challenges the historical paradigm that if the same amount of carbon and nutrients is entrained and subsequently exported, there is no impact on anthropogenic carbon uptake. Anticipation of seasonal asymmetries in the sea surface pCO2 and CO2 flux response to ocean carbon uptake over the 21st century may have important implications for carbon cycle feedbacks. Cooperative Institute for Climate Science Grant Number: NA17RJ2612; David and Lucile ... |
format |
Article in Journal/Newspaper |
author |
Fassbender, Andrea Rodgers, Keith B. Palevsky, Hilary I. Sabine, Christopher L. |
author_facet |
Fassbender, Andrea Rodgers, Keith B. Palevsky, Hilary I. Sabine, Christopher L. |
author_sort |
Fassbender, Andrea |
title |
Seasonal asymmetry in the evolution of surface ocean pCO2 and pH thermodynamic drivers and the influence on sea‐air CO2 flux |
title_short |
Seasonal asymmetry in the evolution of surface ocean pCO2 and pH thermodynamic drivers and the influence on sea‐air CO2 flux |
title_full |
Seasonal asymmetry in the evolution of surface ocean pCO2 and pH thermodynamic drivers and the influence on sea‐air CO2 flux |
title_fullStr |
Seasonal asymmetry in the evolution of surface ocean pCO2 and pH thermodynamic drivers and the influence on sea‐air CO2 flux |
title_full_unstemmed |
Seasonal asymmetry in the evolution of surface ocean pCO2 and pH thermodynamic drivers and the influence on sea‐air CO2 flux |
title_sort |
seasonal asymmetry in the evolution of surface ocean pco2 and ph thermodynamic drivers and the influence on sea‐air co2 flux |
publisher |
John Wiley & Sons |
publishDate |
2018 |
url |
https://hdl.handle.net/1912/10747 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Global Biogeochemical Cycles 32 (2018): 1476-1497 doi:10.1029/2017GB005855 |
op_relation |
https://doi.org/10.1029/2017GB005855 Global Biogeochemical Cycles 32 (2018): 1476-1497 https://hdl.handle.net/1912/10747 doi:10.1029/2017GB005855 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1029/2017GB005855 |
container_title |
Global Biogeochemical Cycles |
container_volume |
32 |
container_issue |
10 |
container_start_page |
1476 |
op_container_end_page |
1497 |
_version_ |
1766159269158191104 |