Project: MPI-M Emission-driven Large Ensemble - The Max Planck Institute for Meteorology (MPI-M) Emission-driven Large Ensemble (MPI-Edriven-LE) is based on the Earth system model MPI-ESM1-2-LR. This ensemble is forced by CO2 emissions in representing the interactive carbon cycle instead of the conventional prescribed CO2 concentration. In this emission-driven ensemble, the atmospheric CO2 concentration evolves in response to the strength of ocean and land carbon sink interactively (Li et al., 2021). This emission-driven ensemble simulations enable investigation of the global carbon cycle and the climate changes in the presence of internal variabilities of the Earth system. The following video illustrates that the atmospheric CO2 varies from seasonal to long-term scale in response to the emission and climate change https://www.dkrz.de/en/communication/galerie/Vis/esm/seasonal-variations-of-co2-under-climate-change. The full dataset can be found on https://esgf-data.dkrz.de/projects/mpi-edriven-le/ This work is supported by the European Union's Horizon 2020 research and innovation program "Climate-Carbon Interactions in the Current Century (4C)" and under grant agreement no. 821003 and "Coordinated Research in Earth Systems and Climate: Experiments, kNowledge, Dissemination and Outreach (CRESCENDO)" under grant agreement no. 641816. Simulations were performed at the German Climate Computing Center (DKRZ). References: Li, H., T. Ilyina, T. Loughran, J. Pongratz (2021): Reconstructions and predictions of the global carbon cycle with an emission-driven Earth System Model. https://doi.org/10.1002/essoar.10508552.1 Summary: MPI-ESM1-2-LR’s CMIP6 CovidMIP baseline simulations are based on simulations forced with CO2 emissions allowing interactive carbon cycle. The baseline simulations (ssp245-cov-baseline, publish here) is a reference to the CovidMIP simulations (ssp245-covid, ssp245-cov-fossil, ssp245-cov-strgreen, and ssp245-cov-modgreen, published under CMIP6 CovidMIP) to investigate the effects of COVID-19 induced emission reductions on global carbon cycle, climate change and feedbacks. As presented in Jones et al. (2021), the radiative and climate responses of MPI-ESM1-2-LR are within the range of multi-model simulation results. have 10 ensemble members of the simulation named from r1i1p1f99 to r10i1p1f99. Here f99 is used in the file name *r*i1p1f99* of all CovidMIP simulations because of the updated aerosol forcing (Fiedler et al. 2021). Fiedler, S.; Wyser, K.; Rogelj, J. & van Noije, T. (2021): Radiative effects of reduced aerosol emissions during the COVID-19 pandemic and the future recovery, Atmospheric Research, 264, 105866, https://doi.org/10.1016/j.atmosres.2021.105866 Jones, C. D., Hickman, J. E., Rumbold, S. T., Walton, J., Lamboll, R. D., Skeie, R. B., ... & Ziehn, T. (2021). The climate response to emissions reductions due to COVID‐19: Initial results from CovidMIP. Geophysical research letters, 48(8), e2020GL091883.
