x4c: Xarray for efficient CESM postprocessing, analysis, and visualization

Major features:

• x4c as an Xarray extension
  • Major geo-spatiotemporal calculations
  • Publication-ready visualizations
• CESM postprocessing
  • History to timeseries (hist2ts) conversion
• CESM diagnostics
  • Existing variables
  • Predefined derived variables
  • User-defined derived variables

Note: The related documentation is still a work in progress.