2008
DOI: 10.1029/2007gb003081
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Abstract: [1] The ability to reliably estimate CO 2 fluxes from current in situ atmospheric CO 2 measurements and future satellite CO 2 measurements is dependent on transport model performance at synoptic and shorter timescales. The TransCom continuous experiment was designed to evaluate the performance of forward transport model simulations at hourly, daily, and synoptic timescales, and we focus on the latter two in this paper. Twenty-five transport models or model variants submitted hourly time series of nine predeter… Show more

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Cited by 133 publications
(198 citation statements)
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“…Nevertheless, the "no covariance" assumption is relatively reasonable considering the sparse spatiotemporal distribution of the observations used here. The misfit uncertainty of 1 ppm is arbitrary but reasonable in representing model-observation misfits, based on the reported numbers published in previous studies (e.g., Patra et al, 2008).…”
Section: Observation-model Misfit Error Covariancementioning
confidence: 99%
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“…Nevertheless, the "no covariance" assumption is relatively reasonable considering the sparse spatiotemporal distribution of the observations used here. The misfit uncertainty of 1 ppm is arbitrary but reasonable in representing model-observation misfits, based on the reported numbers published in previous studies (e.g., Patra et al, 2008).…”
Section: Observation-model Misfit Error Covariancementioning
confidence: 99%
“…This property is absolutely necessary for transport simulations of long-lived tracers such as GHGs. Because of this, NICAM-TM has been developed and used for transport and inversion studies of CO 2 Patra et al, 2008;Niwa et al, 2011bNiwa et al, , 2012Peylin et al, 2013). Its fundamental transport performances have been evaluated satisfactorily using observations of radon ( 222 Rn) and sulfur hexafluoride (SF 6 ) (Niwa et al, 2011a(Niwa et al, , 2012.…”
Section: Nicam-tmmentioning
confidence: 99%
“…nomad3.ncepnoaa.gov/ncep_data) at 6-hourly interval with 1°×1° grid resolution. The initial and boundary conditions for five tracer CO 2 components (details in Subsection 2.2) are obtained from the Center for Climate System Research/National Institute for Environmental Studies/Frontier Research Center for Global Change (CCSR/NIES/FRCGC) atmospheric general circulation model (AGCM)-based Chemistry-Transport Model (ACTM) (Patra et al 2008;. Initial background concentrations for CO 2 tracer components is set at about 370 ppm as simulated by the ACTM.…”
Section: P P P P T S Tmentioning
confidence: 99%
“…After deseasonalizing of the time series using the Nakazawa et al (1997) filtering technique, we obtain the synoptic variations in CO 2 concentrations (as defined in Patra et al 2008). Examples of deseasonalized time series for observed and model data are shown in Figs.…”
Section: Model Performance For Daily-average Comentioning
confidence: 99%
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