Please cite this data as: Schuldt, K. N., Jacobson, A. R., Hu, L., & NOAA Global Monitoring Laboratory. (2023). TM5 simulations of sector- and region-specific CT2019B CO2 fluxes [Data set]. NOAA GML. https://doi.org/10.15138/M006-0J65 These are TM5 simulations of CT2019B CO2 fluxes by sector and region. The sectors are fossil fuel emissions, wildire emission, non-fire net land-biosphere exchange, and net air-sea gas exchange. The regions are the 23 Transcom regions spanning the globe. Each simulated cosamples the same ObsPack data so that the observed seasonal cycle at each site can be decomposed into contributions from each sector and region. Files here are organized by Transcom region. For example, "SCA_TC_region_3.tar" contains the sector-specific contributions to each ObsPack dataset from fluxes in Transcom region 3, Tropical South America. Measurements being sampled for these simulations come from the composite ObsPack "obspack_co2_1_CT2019_v1.2_2019-08-21", which is derived mostly from GLOBALVIEW+ version 5.0. See CT2019B documentation at https://gml.noaa.gov/ccgg/carbontracker/CT2019B/CT2019B_doc.php#tth_sEc7 for full details. For more questions, please contact the following authors: Schuldt, K. N. (kenneth.schuldt@noaa.gov) Jacobson, A. (andy.jacobson@noaa.gov) Hu, L. (lei.hu@noaa.gov)