vations. It would also require enhanced collaboration among federal agencies with carbon observations, especially between NASA and NOAA, so that the best estimates and the uncertainties in the meteorology become integral components of emission estimation from a replacement OCO.

  • Sustain the infrastructure to measure natural sources and sinks on land and in the ocean, which must be separated from the total non-fossil-fuel flux to estimate agriculture, forestry, and other land-use (AFOLU) emissions. This requires sustaining the terrestrial flux network of sites (see Chapter 2)—augmented with high-precision, high-accuracy CO2 sampling for bottom-up and top-down model calibration—and continued measurements of the oceanic sink (see Appendix C).

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