TransCom 3 Atmospheric Carbon Inversion Intercomparison: Comparing the Long-term Means and Biogeochemical Interpretation of the Interannual Carbon Exchange

This talk will interpret results from the TransCom 3 control interannual time dependent inversion. First, the long-term mean carbon exchange will be compared across the three different TransCom 3 inversion levels: the annual mean, seasonal, and interannual control experiments. We will highlight the agreement among these experiments in spite of the differing degrees of freedom, and the differing CO2 observing networks employed. Comparison will be made to independent decadal estimates of land and ocean carbon uptake with the sensitivity to different CO2 networks noted. We will also interpret the model mean interannual carbon fluxes as they relate to key indices of climate variability. In particular, correlation to the El Nino/Southern Oscillation index will be made suggesting a propagation carbon flux anomalies from the tropics to the extra tropics following the peak of the ENSO warm phase in the tropical Pacific ocean. These correlations will be explained via anomalies in temperature and precipitation from NCEP reanalysis. Acknowledgement goes to all the TransCom 3 modelers for supplying their model output.