Interannual variability of the global carbon cycle (1992–2005) inferred by inversion of atmospheric CO2 and δ13CO2 measurements
Identifieur interne : 008796 ( Main/Exploration ); précédent : 008795; suivant : 008797Interannual variability of the global carbon cycle (1992–2005) inferred by inversion of atmospheric CO2 and δ13CO2 measurements
Auteurs : P. J. Rayner [France] ; R. M. Law [Australie] ; C. E. Allison [Australie] ; R. J. Francey [Australie] ; C. M. Trudinger [Australie] ; C. Pickett-Heaps [France]Source :
- Global Biogeochemical Cycles [ 0886-6236 ] ; 2008-09.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Atmosphère, Biomasse, Combustible fossile, Océan.
English descriptors
- KwdEn :
- Allison, Anomalous, Anomalous source, Anomaly, Asia, Asian anomaly, Atmospheric, Atmospheric carbon dioxide, Atmospheric inversions, Atmospheric models, Atmospheric research, Atmospheric transport, Biogeochem, Burned ground, Cape rama, Carbon cycle, Carbon dioxide, Ccam, Ciais, Constraint, Control inversions, Cost function, Covariance, Csiro, Csiro marine, Data density, Data uncertainty, Dioxide, Dramatic events, Enting, Excursion, Flux anomalies, Flux anomaly, Fluxes show, Fossil, Fossil fuel, Francey, Geophys, Global, Global biogeochem, Global carbon cycle, Global carbon cycle figure, Good agreement, Good constraint, Gross fluxes, Growth rate, Gurney, Interannual, Interannual variability, Inversion, Inversion intercomparison, Inversion results, Land region, Land regions, Maximum reduction, Measurement sites, Modeling, Negative event, Northern extratropics, Northern land, Northern land anomaly, Northern ocean, Ocean fluxes, Ocean regions, Particular events, Peylin, Pinatubo eruption, Positive anomalies, Posterior covariance matrix, Posterior uncertainty, Posterior uncertainty covariance, Primary production, Primary productivity, Randerson, Rayner, Sampling laboratory, Separate land, Significant variability, Source resolution, Southern hemisphere, Southern land, Southern ocean, Southern oscillation index, Statistical significance, Study period, Tellus, Terrestrial fluxes, Tracer transport, Transcom, Transport models, Tropical land, Tropical ocean, Variability, Werf, anomalies, atmosphere, biomass, carbon cycle, global, inverse problem, isotopes, models, ocean, uncertainties, variability.
- Teeft :
- Allison, Anomalous, Anomalous source, Anomaly, Asian anomaly, Atmospheric, Atmospheric carbon dioxide, Atmospheric inversions, Atmospheric models, Atmospheric research, Atmospheric transport, Biogeochem, Cape rama, Carbon cycle, Ccam, Ciais, Constraint, Control inversions, Cost function, Covariance, Csiro, Csiro marine, Data density, Data uncertainty, Dioxide, Dramatic events, Enting, Excursion, Flux anomalies, Flux anomaly, Fluxes show, Fossil, Fossil fuel, Francey, Geophys, Global, Global biogeochem, Global carbon cycle, Global carbon cycle figure, Good agreement, Good constraint, Gross fluxes, Growth rate, Gurney, Interannual, Interannual variability, Inversion, Inversion intercomparison, Inversion results, Land region, Land regions, Maximum reduction, Measurement sites, Modeling, Negative event, Northern extratropics, Northern land, Northern land anomaly, Northern ocean, Ocean fluxes, Ocean regions, Particular events, Peylin, Pinatubo eruption, Positive anomalies, Posterior covariance matrix, Posterior uncertainty, Posterior uncertainty covariance, Primary production, Primary productivity, Randerson, Rayner, Sampling laboratory, Separate land, Significant variability, Source resolution, Southern hemisphere, Southern land, Southern ocean, Southern oscillation index, Statistical significance, Study period, Tellus, Terrestrial fluxes, Tracer transport, Transcom, Transport models, Tropical land, Tropical ocean, Variability, Werf.
Abstract
We present estimates of the surface sources and sinks of CO2 for 1992–2005 deduced from atmospheric inversions. We use atmospheric CO2 records from 67 sites and 10 δ13CO2 records. We use two atmospheric models to increase the robustness of the results. The results suggest that interannual variability is dominated by the tropical land. Statistically significant variability in the tropical Pacific supports recent ocean modeling studies in that region. The northern land also shows significant variability. In particular, there is a large positive anomaly in 2003 in north Asia, which we associate with anomalous biomass burning. Results using δ13CO2 and CO2 are statistically consistent with those using only CO2, suggesting that it is valid to use both types of data together. An objective analysis of residuals suggests that our treatment of uncertainties in CO2 is conservative, while those for δ13CO2 are optimistic, highlighting problems in our simple isotope model. Finally, δ13CO2 measurements offer a good constraint to nearby land regions, suggesting an ongoing value in these measurements for studies of interannual variability.
Url:
DOI: 10.1029/2007GB003068
Affiliations:
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<term>Anomalous</term>
<term>Anomalous source</term>
<term>Anomaly</term>
<term>Asia</term>
<term>Asian anomaly</term>
<term>Atmospheric</term>
<term>Atmospheric carbon dioxide</term>
<term>Atmospheric inversions</term>
<term>Atmospheric models</term>
<term>Atmospheric research</term>
<term>Atmospheric transport</term>
<term>Biogeochem</term>
<term>Burned ground</term>
<term>Cape rama</term>
<term>Carbon cycle</term>
<term>Carbon dioxide</term>
<term>Ccam</term>
<term>Ciais</term>
<term>Constraint</term>
<term>Control inversions</term>
<term>Cost function</term>
<term>Covariance</term>
<term>Csiro</term>
<term>Csiro marine</term>
<term>Data density</term>
<term>Data uncertainty</term>
<term>Dioxide</term>
<term>Dramatic events</term>
<term>Enting</term>
<term>Excursion</term>
<term>Flux anomalies</term>
<term>Flux anomaly</term>
<term>Fluxes show</term>
<term>Fossil</term>
<term>Fossil fuel</term>
<term>Francey</term>
<term>Geophys</term>
<term>Global</term>
<term>Global biogeochem</term>
<term>Global carbon cycle</term>
<term>Global carbon cycle figure</term>
<term>Good agreement</term>
<term>Good constraint</term>
<term>Gross fluxes</term>
<term>Growth rate</term>
<term>Gurney</term>
<term>Interannual</term>
<term>Interannual variability</term>
<term>Inversion</term>
<term>Inversion intercomparison</term>
<term>Inversion results</term>
<term>Land region</term>
<term>Land regions</term>
<term>Maximum reduction</term>
<term>Measurement sites</term>
<term>Modeling</term>
<term>Negative event</term>
<term>Northern extratropics</term>
<term>Northern land</term>
<term>Northern land anomaly</term>
<term>Northern ocean</term>
<term>Ocean fluxes</term>
<term>Ocean regions</term>
<term>Particular events</term>
<term>Peylin</term>
<term>Pinatubo eruption</term>
<term>Positive anomalies</term>
<term>Posterior covariance matrix</term>
<term>Posterior uncertainty</term>
<term>Posterior uncertainty covariance</term>
<term>Primary production</term>
<term>Primary productivity</term>
<term>Randerson</term>
<term>Rayner</term>
<term>Sampling laboratory</term>
<term>Separate land</term>
<term>Significant variability</term>
<term>Source resolution</term>
<term>Southern hemisphere</term>
<term>Southern land</term>
<term>Southern ocean</term>
<term>Southern oscillation index</term>
<term>Statistical significance</term>
<term>Study period</term>
<term>Tellus</term>
<term>Terrestrial fluxes</term>
<term>Tracer transport</term>
<term>Transcom</term>
<term>Transport models</term>
<term>Tropical land</term>
<term>Tropical ocean</term>
<term>Variability</term>
<term>Werf</term>
<term>anomalies</term>
<term>atmosphere</term>
<term>biomass</term>
<term>carbon cycle</term>
<term>global</term>
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<term>isotopes</term>
<term>models</term>
<term>ocean</term>
<term>uncertainties</term>
<term>variability</term>
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<term>Asie</term>
<term>Atmosphère</term>
<term>Biomasse</term>
<term>Brûlis</term>
<term>Cycle carbone</term>
<term>Dioxyde de carbone</term>
<term>Incertitude</term>
<term>Isotope</term>
<term>Modèle</term>
<term>Modélisation</term>
<term>Monde</term>
<term>Océan</term>
<term>Problème inverse</term>
<term>Variabilité</term>
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<term>Anomalous</term>
<term>Anomalous source</term>
<term>Anomaly</term>
<term>Asian anomaly</term>
<term>Atmospheric</term>
<term>Atmospheric carbon dioxide</term>
<term>Atmospheric inversions</term>
<term>Atmospheric models</term>
<term>Atmospheric research</term>
<term>Atmospheric transport</term>
<term>Biogeochem</term>
<term>Cape rama</term>
<term>Carbon cycle</term>
<term>Ccam</term>
<term>Ciais</term>
<term>Constraint</term>
<term>Control inversions</term>
<term>Cost function</term>
<term>Covariance</term>
<term>Csiro</term>
<term>Csiro marine</term>
<term>Data density</term>
<term>Data uncertainty</term>
<term>Dioxide</term>
<term>Dramatic events</term>
<term>Enting</term>
<term>Excursion</term>
<term>Flux anomalies</term>
<term>Flux anomaly</term>
<term>Fluxes show</term>
<term>Fossil</term>
<term>Fossil fuel</term>
<term>Francey</term>
<term>Geophys</term>
<term>Global</term>
<term>Global biogeochem</term>
<term>Global carbon cycle</term>
<term>Global carbon cycle figure</term>
<term>Good agreement</term>
<term>Good constraint</term>
<term>Gross fluxes</term>
<term>Growth rate</term>
<term>Gurney</term>
<term>Interannual</term>
<term>Interannual variability</term>
<term>Inversion</term>
<term>Inversion intercomparison</term>
<term>Inversion results</term>
<term>Land region</term>
<term>Land regions</term>
<term>Maximum reduction</term>
<term>Measurement sites</term>
<term>Modeling</term>
<term>Negative event</term>
<term>Northern extratropics</term>
<term>Northern land</term>
<term>Northern land anomaly</term>
<term>Northern ocean</term>
<term>Ocean fluxes</term>
<term>Ocean regions</term>
<term>Particular events</term>
<term>Peylin</term>
<term>Pinatubo eruption</term>
<term>Positive anomalies</term>
<term>Posterior covariance matrix</term>
<term>Posterior uncertainty</term>
<term>Posterior uncertainty covariance</term>
<term>Primary production</term>
<term>Primary productivity</term>
<term>Randerson</term>
<term>Rayner</term>
<term>Sampling laboratory</term>
<term>Separate land</term>
<term>Significant variability</term>
<term>Source resolution</term>
<term>Southern hemisphere</term>
<term>Southern land</term>
<term>Southern ocean</term>
<term>Southern oscillation index</term>
<term>Statistical significance</term>
<term>Study period</term>
<term>Tellus</term>
<term>Terrestrial fluxes</term>
<term>Tracer transport</term>
<term>Transcom</term>
<term>Transport models</term>
<term>Tropical land</term>
<term>Tropical ocean</term>
<term>Variability</term>
<term>Werf</term>
</keywords>
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<term>Biomasse</term>
<term>Combustible fossile</term>
<term>Océan</term>
</keywords>
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<front><div type="abstract">We present estimates of the surface sources and sinks of CO2 for 1992–2005 deduced from atmospheric inversions. We use atmospheric CO2 records from 67 sites and 10 δ13CO2 records. We use two atmospheric models to increase the robustness of the results. The results suggest that interannual variability is dominated by the tropical land. Statistically significant variability in the tropical Pacific supports recent ocean modeling studies in that region. The northern land also shows significant variability. In particular, there is a large positive anomaly in 2003 in north Asia, which we associate with anomalous biomass burning. Results using δ13CO2 and CO2 are statistically consistent with those using only CO2, suggesting that it is valid to use both types of data together. An objective analysis of residuals suggests that our treatment of uncertainties in CO2 is conservative, while those for δ13CO2 are optimistic, highlighting problems in our simple isotope model. Finally, δ13CO2 measurements offer a good constraint to nearby land regions, suggesting an ongoing value in these measurements for studies of interannual variability.</div>
</front>
</TEI>
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