wdc-climate.de:3907400 eng; USA collection MoDataInToTr21stCLandFl Selma Bultan Ludwig-Maximilians-University Munich not filled pointOfContact Prof. Julia Pongratz Ludwig-Maximilians-University Munich not filled pointOfContact 2022-06-20T07:58:52 ISO 19115 ISO 19115-2:2009 Tracking 21st century anthropogenic and natural carbon fluxes through model-data integration 2022-07-27 publication 1 MoDataInToTr21stCLandFl doi:10.26050/WDCC/MoDataInToTr21stCLandFl Selma Bultan Ludwig-Maximilians-University Munich not filled Email: selma.bultan@lmu.de principalInvestigator Selma Bultan Ludwig-Maximilians-University Munich not filled Email: selma.bultan@lmu.de author Prof. Julia Pongratz Ludwig-Maximilians-University Munich not filled Email: julia.pongratz@geographie.uni-muenchen.de author WDC Climate at DKRZ publisher A time series of 21st century observation-based woody vegetation carbon stocks (Xu et al.,2021; https://www.science.org/doi/10.1126/sciadv.abe9829) was assimilated into the bookkeeping model BLUE ('bookkeeping of land use emissions') (Hansis et al.,2015; https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2014GB004997). Two data-integration experiments were performed to isolate anthropogenic and natural carbon fluxes. The 'transient' experiment relies on assimilating the time series of observation-based vegetation carbon stocks at each (annual) time step in BLUE. In the 'transient' experiment, changes in woody vegetation carbon between two time steps are due to the combination of environmental and anthropogenic processes. In the 'fixed' experiment, the time series of observation-based woody vegetation carbon is only assimilated in BLUE at the first time step and changes in woody vegetation carbon between two time steps are only due to anthropogenic processes. The environmental carbon fluxes were subsequently derived by taking the difference in vegetation carbon stocks between the transient and fixed experiments. All spatially explicit variables are on a geographical latitude-longitude grid with a resolution of 0.25°. Selma Bultan Ludwig-Maximilians-University Munich not filled pointOfContact Prof. Julia Pongratz Ludwig-Maximilians-University Munich not filled pointOfContact NetCDF 21st century biogeochemistry fixed climate and CO2 model-data integration transient climate and CO2 CC-BY-4.0: Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ eng; USA -180.0 180.0 -90.0 90.0 proleptic_gregorian 2000-12-31 2019-12-31 cell_area Model Grid-Cell Area [CF-Standard Name]; unit: not filled carbon_mass_flux (SLAND_B_regs) Carbon fluxes from woody vegetation due to to environmental processes (negative for uptakes, positive for releases); unit: not filled precipitation and forest biomass carbon (Spearman_correlation_forest_bioC_P) Spearman correlation between anomalies of a) forest biomass carbon and b) precipitation; unit: not filled carbon_mass_flux (SLAND_B) Carbon fluxes from woody vegetation due to to environmental processes (negative for uptakes, positive for releases); unit: not filled carbon_mass_flux (ELUC_fix) Carbon fluxes due to land use and land cover changes (ELUC) (negative for fluxes into land); unit: not filled p_value not filled; unit: not filled woody biomass (Agreement_trends_BioC) Agreement trends assimilated and observed woody biomass time series; unit: not filled air_temperature and forest biomass carbon (Spearman_correlation_forest_bioC_Ta) Spearman correlation between anomalies of a) forest biomass carbon and b) air temperature; unit: not filled woody vegetation carbon stocks (Assimilation_bias) Bias due to data assimilation (difference between observed and assimilated woody vegetation carbon stocks); unit: not filled carbon_mass_flux (ELUC_transient) Carbon fluxes due to land use and land cover changes (ELUC) (negative for fluxes into land); unit: not filled NetCDF 270 https://www.wdc-climate.de/ui/entry?acronym=MoDataInToTr21stCLandFl information collection n/a None