metadata

license: apache-2.0

ACE2-ERA5

Ai2 Climate Emulator (ACE) is a family of models designed to simulate atmospheric variability from the time scale of days to centuries.

Disclaimer: ACE models are research tools and should not be used for operational climate predictions.

ACE2-ERA5 is trained on the ERA5 dataset and will be described in a forthcoming paper.

Code for doing inference with ACE models can be found here: https://github.com/ai2cm/ace with corresponding documentation here: https://ai2-climate-emulator.readthedocs.io/en/stable/

Briefly, the strengths of ACE2-ERA5 are:

accurate atmospheric warming response to combined increase of sea surface temperature and CO2 over last 80 years
highly accurate atmospheric response to El Niño sea surface temperature variability
good representation of geographic distribution of tropical cyclones
accurate Madden Julian Oscillation variability
realistic stratospheric polar vortex strength and variability
exact conservation of global dry air mass and moisture

Some known weaknesses are:

the individual sensitivities to increased sea surface temperature and CO2 are not entirely realistic
the medium-range (3-10 day) weather forecast skill is not state of the art
not expected to generalize accurately for large perturbations of inputs (e.g. doubling of CO2)