Simulation and assimilation of global ocean pCO2 and air–sea CO2 fluxes using ship observations of surface ocean pCO2 in a simplified biogeochemical offline model.
We used an offline tracer transport model, driven by reanalysis ocean currents and coupled to a simple biogeochemical model, to synthesize the surface ocean pCO2 and air–sea CO2 flux of the global ocean from 1996 to 2004, using a variational assimilation method. This oceanic CO2 flux analysis system...
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ftdatacite:10.25607/obp-474 2023-05-15T18:25:39+02:00 Simulation and assimilation of global ocean pCO2 and air–sea CO2 fluxes using ship observations of surface ocean pCO2 in a simplified biogeochemical offline model. Valsala, Vinu Maksyutov, Shamil 2010 pp.821–84 https://dx.doi.org/10.25607/obp-474 https://www.oceanbestpractices.net/handle/11329/933 en eng UNESCO/IOC Parameter DisciplineChemical oceanography CreativeWork article 2010 ftdatacite https://doi.org/10.25607/obp-474 2021-11-05T12:55:41Z We used an offline tracer transport model, driven by reanalysis ocean currents and coupled to a simple biogeochemical model, to synthesize the surface ocean pCO2 and air–sea CO2 flux of the global ocean from 1996 to 2004, using a variational assimilation method. This oceanic CO2 flux analysis system was developed at the National Institute for Environmental Studies (NIES), Japan, as part of a project that provides prior fluxes for atmospheric inversions using CO2 measurements made from an on-board instrument attached to the Greenhouse gas Observing SATellite (GOSAT). Nearly 250 000 pCO2 observations from the database of Takahashi et al. (2007) have been assimilated into the model with a strong constraint provide by ship-track observations while maintaining a weak constraint of 20% on global averages of monthly mean pCO2 in regions where observations are limited. The synthesized global air–sea CO2 flux shows a net sink of 1.48 PgC yr−1. The Southern Ocean air–sea CO2 flux is a sink of 0.41 PgC yr−1. The interannual variability of synthesized CO2 flux from the El Nino region suggests a weaker source (by an amplitude of 0.4 PgC yr ˜ −1) during the El Nino events in 1997/1998 and 2003/2004. The assimilated air–sea CO ˜ 2 flux shows remarkable correlations with the CO2 fluxes obtained from atmospheric inversions on interannual time-scales. Article in Journal/Newspaper Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Southern Ocean |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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English |
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Parameter DisciplineChemical oceanography |
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Parameter DisciplineChemical oceanography Valsala, Vinu Maksyutov, Shamil Simulation and assimilation of global ocean pCO2 and air–sea CO2 fluxes using ship observations of surface ocean pCO2 in a simplified biogeochemical offline model. |
topic_facet |
Parameter DisciplineChemical oceanography |
description |
We used an offline tracer transport model, driven by reanalysis ocean currents and coupled to a simple biogeochemical model, to synthesize the surface ocean pCO2 and air–sea CO2 flux of the global ocean from 1996 to 2004, using a variational assimilation method. This oceanic CO2 flux analysis system was developed at the National Institute for Environmental Studies (NIES), Japan, as part of a project that provides prior fluxes for atmospheric inversions using CO2 measurements made from an on-board instrument attached to the Greenhouse gas Observing SATellite (GOSAT). Nearly 250 000 pCO2 observations from the database of Takahashi et al. (2007) have been assimilated into the model with a strong constraint provide by ship-track observations while maintaining a weak constraint of 20% on global averages of monthly mean pCO2 in regions where observations are limited. The synthesized global air–sea CO2 flux shows a net sink of 1.48 PgC yr−1. The Southern Ocean air–sea CO2 flux is a sink of 0.41 PgC yr−1. The interannual variability of synthesized CO2 flux from the El Nino region suggests a weaker source (by an amplitude of 0.4 PgC yr ˜ −1) during the El Nino events in 1997/1998 and 2003/2004. The assimilated air–sea CO ˜ 2 flux shows remarkable correlations with the CO2 fluxes obtained from atmospheric inversions on interannual time-scales. |
format |
Article in Journal/Newspaper |
author |
Valsala, Vinu Maksyutov, Shamil |
author_facet |
Valsala, Vinu Maksyutov, Shamil |
author_sort |
Valsala, Vinu |
title |
Simulation and assimilation of global ocean pCO2 and air–sea CO2 fluxes using ship observations of surface ocean pCO2 in a simplified biogeochemical offline model. |
title_short |
Simulation and assimilation of global ocean pCO2 and air–sea CO2 fluxes using ship observations of surface ocean pCO2 in a simplified biogeochemical offline model. |
title_full |
Simulation and assimilation of global ocean pCO2 and air–sea CO2 fluxes using ship observations of surface ocean pCO2 in a simplified biogeochemical offline model. |
title_fullStr |
Simulation and assimilation of global ocean pCO2 and air–sea CO2 fluxes using ship observations of surface ocean pCO2 in a simplified biogeochemical offline model. |
title_full_unstemmed |
Simulation and assimilation of global ocean pCO2 and air–sea CO2 fluxes using ship observations of surface ocean pCO2 in a simplified biogeochemical offline model. |
title_sort |
simulation and assimilation of global ocean pco2 and air–sea co2 fluxes using ship observations of surface ocean pco2 in a simplified biogeochemical offline model. |
publisher |
UNESCO/IOC |
publishDate |
2010 |
url |
https://dx.doi.org/10.25607/obp-474 https://www.oceanbestpractices.net/handle/11329/933 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_doi |
https://doi.org/10.25607/obp-474 |
_version_ |
1766207231947177984 |