mesmer-emulator 1.0.0

Modular Earth System Model Emulator with spatially Resolved output

MESMER: spatially resolved Earth System Model emulations

MESMER is a Modular Earth System Model Emulator with spatially Resolved output, which stochastically creates Earth System Model-specific spatio-temporally correlated climate variable field realizations at a negligible computational cost.

In combination with a global mean temperature emulator, MESMER can account for all three major sources of climate change projection uncertainty at the local scale: (i) internal variability uncertainty, i.e., unforced natural climate variability; (ii) forced climate response uncertainty, i.e., the Earth’s system response to forced natural changes (solar and volcanic) and human influences (greenhouse gas and aerosol emissions, land use changes etc.); and (iii) emission uncertainty, i.e., uncertainty in the emission pathway humans decide to follow. An interface between MESMER and global mean temperature emulators can be found at https://github.com/MESMER-group/mesmer-openscmrunner.

MESMER provides infrastructure to emulate annual and monthly near-surface air temperature (MESMER and MESMER-M) as well as various climate extreme indicators (MESMER-X).

MESMER is under active development both scientifically and technically. Future work will increase its user friendliness and extend its emulation capabilities to include additional emulation methods and target climate variables.

Citing MESMER

Scientific publications using MESMER Software should cite the following publication:

Bauer, V. M., Hauser, M., Quilcaille, Y., Schöngart, S., Gudmundsson, L., and Seneviratne, S. I.: MESMER v1.0.0: Consolidating the Modular Earth System Model Emulator into a Sustainable Research Software Package, Geosci. Model Dev., tba, tba, 2026.

Depending on which application of MESMER you use (MESMER, MESMER-M, MESMER-X, etc.) please also cite the relevant publications found in our publication list.

License

Copyright (c) 2021 ETH Zurich, MESMER contributors listed in AUTHORS.

MESMER is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 3 or (at your option) any later version.

MESMER is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with MESMER. If not, see https://www.gnu.org/licenses/.

The full list of code contributors can be found in AUTHORS or on github.com/contributors

Mesmer bundles data for analysis, tutorials, and testing:

• CMIP6 data from IPSL-CM6A-LR model, available under a CC BY 4.0 license. Used in tutorial notebooks and tests.

• Stratospheric aerosol optical depth data sourced licensed as Creative Commons Zero. Used to estimate the volcanic influence.

For details see data README.