The ORNL DAAC announces the release of "TransCom 3: Seasonal CO2 Flux Estimates from Atmospheric Inversions (Level 2)", prepared by K.R. Gurney and A.S. Denning.
This data set provides model outputs and seasonal mean CO2 fluxes from the Atmospheric Carbon Cycle Inversion Intercomparison (TransCom 3), Level 2 inversion experiment. This Level 2 experiment inverted for the spatial and temporal pattern of the residual CO2 sources and sinks. The seasonal inversion consists of a 3-year forward simulation (365 days per year) containing 4 presubtracted tracers, 11 SF6 tracers, and 22 CO2 tracers (11 terrestrial, 11 oceanic) (Gurney et al., 2000). Carbon fluxes were estimated for each month of an average year determined as the mean of the 1992-1996 time period from an intercomparison of 12 different atmospheric tracer transport models.
The Atmospheric Tracer Transport Model Intercomparison Project (TransCom) was created to quantify and diagnose the uncertainty in inversion calculations of the global carbon budget that results from errors in simulated atmospheric transport. All three phases of TransCom are complete. The Atmospheric Carbon Cycle Inversion Intercomparision (TransCom3) conducted a series of experiments in which 16 chemical tracer transport models were used to calculate the global carbon budget of the atmosphere.
See our TransCom Project page for further information about the project and to access associated data and documentation maintained by the ORNL DAAC.
The ORNL DAAC is a NASA-funded data center archiving and distributing terrestrial ecology and biogeochemical dynamics data.