Design of an observational strategy for quantifying the Southern Ocean uptake of CO 2
International audience A sampling strategy to estimate the annual mean CO 2 uptake by the Southern Ocean was developed by applying two-dimensional Fourier transforms and signal-to-noise ratios to the simulated air-sea CO 2 fluxes and ΔpCO 2 from an ocean biogeochemical model driven with NCEP-R1. Obs...
Published in: | Global Biogeochemical Cycles |
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Main Authors: | , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2006
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Online Access: | https://hal.science/hal-00770730 https://hal.science/hal-00770730/document https://hal.science/hal-00770730/file/2005GB002620.pdf https://doi.org/10.1029/2005GB002620 |
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Université de Paris: Portail HAL |
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Biogeosciences: Climate dynamics (1620) [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
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Biogeosciences: Climate dynamics (1620) [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Lenton, Andrew Matear, Richard J. Tilbrook, Bronte Design of an observational strategy for quantifying the Southern Ocean uptake of CO 2 |
topic_facet |
Biogeosciences: Climate dynamics (1620) [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience A sampling strategy to estimate the annual mean CO 2 uptake by the Southern Ocean was developed by applying two-dimensional Fourier transforms and signal-to-noise ratios to the simulated air-sea CO 2 fluxes and ΔpCO 2 from an ocean biogeochemical model driven with NCEP-R1. Observations of pCO 2 were used to validate the statistical properties of the model and to estimate the mesoscale variability not captured by the model resolution. Sampling regularly every 3 months, at every 30° in longitude and 3° in latitude is sufficient to determine the net Southern Ocean CO 2 uptake. We applied this sampling strategy to the simulated air-sea fluxes to estimate a net annual mean CO 2 uptake of 0.6 +/- 0.1 PgC/yr (1990-1999). This uncertainty in the estimate was dominated by the simulated interannual variability, and not by errors in the sampling or unresolved mesoscale variability. Therefore sampling at higher resolutions in space and time would not reduce the uncertainty in the Southern Ocean annual mean uptake any further. These results show that a doubling of the current Southern Ocean sampling (in longitude) would be required to constrain the net annual mean air-sea CO 2 fluxes to within the natural variability of the system. |
author2 |
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-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 Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Institute of Antarctic and Southern Ocean Studies (IASOS) University of Tasmania Hobart, Australia (UTAS) Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC) |
format |
Article in Journal/Newspaper |
author |
Lenton, Andrew Matear, Richard J. Tilbrook, Bronte |
author_facet |
Lenton, Andrew Matear, Richard J. Tilbrook, Bronte |
author_sort |
Lenton, Andrew |
title |
Design of an observational strategy for quantifying the Southern Ocean uptake of CO 2 |
title_short |
Design of an observational strategy for quantifying the Southern Ocean uptake of CO 2 |
title_full |
Design of an observational strategy for quantifying the Southern Ocean uptake of CO 2 |
title_fullStr |
Design of an observational strategy for quantifying the Southern Ocean uptake of CO 2 |
title_full_unstemmed |
Design of an observational strategy for quantifying the Southern Ocean uptake of CO 2 |
title_sort |
design of an observational strategy for quantifying the southern ocean uptake of co 2 |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00770730 https://hal.science/hal-00770730/document https://hal.science/hal-00770730/file/2005GB002620.pdf https://doi.org/10.1029/2005GB002620 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-00770730 Global Biogeochemical Cycles, 2006, 20, pp.4010. ⟨10.1029/2005GB002620⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2005GB002620 hal-00770730 https://hal.science/hal-00770730 https://hal.science/hal-00770730/document https://hal.science/hal-00770730/file/2005GB002620.pdf BIBCODE: 2006GBioC.20.4010L doi:10.1029/2005GB002620 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2005GB002620 |
container_title |
Global Biogeochemical Cycles |
container_volume |
20 |
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4 |
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1799467157309882368 |
spelling |
ftunivparis:oai:HAL:hal-00770730v1 2024-05-19T07:48:48+00:00 Design of an observational strategy for quantifying the Southern Ocean uptake of CO 2 Lenton, Andrew Matear, Richard J. Tilbrook, Bronte Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-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 Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Institute of Antarctic and Southern Ocean Studies (IASOS) University of Tasmania Hobart, Australia (UTAS) Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC) 2006-11 https://hal.science/hal-00770730 https://hal.science/hal-00770730/document https://hal.science/hal-00770730/file/2005GB002620.pdf https://doi.org/10.1029/2005GB002620 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2005GB002620 hal-00770730 https://hal.science/hal-00770730 https://hal.science/hal-00770730/document https://hal.science/hal-00770730/file/2005GB002620.pdf BIBCODE: 2006GBioC.20.4010L doi:10.1029/2005GB002620 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-00770730 Global Biogeochemical Cycles, 2006, 20, pp.4010. ⟨10.1029/2005GB002620⟩ Biogeosciences: Climate dynamics (1620) [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2006 ftunivparis https://doi.org/10.1029/2005GB002620 2024-04-23T03:40:23Z International audience A sampling strategy to estimate the annual mean CO 2 uptake by the Southern Ocean was developed by applying two-dimensional Fourier transforms and signal-to-noise ratios to the simulated air-sea CO 2 fluxes and ΔpCO 2 from an ocean biogeochemical model driven with NCEP-R1. Observations of pCO 2 were used to validate the statistical properties of the model and to estimate the mesoscale variability not captured by the model resolution. Sampling regularly every 3 months, at every 30° in longitude and 3° in latitude is sufficient to determine the net Southern Ocean CO 2 uptake. We applied this sampling strategy to the simulated air-sea fluxes to estimate a net annual mean CO 2 uptake of 0.6 +/- 0.1 PgC/yr (1990-1999). This uncertainty in the estimate was dominated by the simulated interannual variability, and not by errors in the sampling or unresolved mesoscale variability. Therefore sampling at higher resolutions in space and time would not reduce the uncertainty in the Southern Ocean annual mean uptake any further. These results show that a doubling of the current Southern Ocean sampling (in longitude) would be required to constrain the net annual mean air-sea CO 2 fluxes to within the natural variability of the system. Article in Journal/Newspaper Southern Ocean Université de Paris: Portail HAL Global Biogeochemical Cycles 20 4 n/a n/a |