Merge pull request #109 from xylar/update-to-1.9.0

Update to 1.9.0

README.md

@@ -1,30 +1,27 @@
 # E3SM-Unified
 
-A metapackage for a unified anaconda environment for analyzing results from
-the Energy Exascale Earth System Model (E3SM).
+A metapackage for a unified 
+[conda environment](https://conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html)
+for analysis an other post-processing of results from Energy Exascale Earth 
+System Model (E3SM) simulations.
 
-E3SM-Unified currently supports linux and OSX, and python >= 3.8 and < 3.11.
-A Windows  version is not available and the development of one is not planned.
+E3SM-Unified currently supports Linux and OSX, and python >=3.9,<3.11.
+Support for Windows is not planned.
 
-Users can create a new anaconda environment either with or without MPI support
-from conda.  To create the latest version of the E3SM-Unified environment with 
-MPI support from the `mpich` package, use:
-```
-conda config --add channels conda-forge
-conda config --set channel_priority strict
-conda create -n e3sm-unified-mpich -c conda-forge -c defaults -c e3sm \
+To create a new conda environment on a laptop or workstation (or on
+HPC that is not already supported by the E3SM team), first install
+[Mambaforge](https://github.com/conda-forge/miniforge#mambaforge).  Then,
+create the E3SM-Unified environment (with MPI support from the `mpich` package
+in this example), use:
+```bash 
+mamba create -n e3sm-unified -c conda-forge -c defaults -c e3sm \
     python=3.10 "e3sm-unified=*=mpi_mpich_*"
+mamba activate e3sm-unified
 ```
-To create and environment without MPI, use:
-```
-conda config --add channels conda-forge
-conda config --set channel_priority strict
-conda create -n e3sm-unified-nompi -c conda-forge -c defaults -c e3sm \
-    python=3.10 "e3sm-unified=*=nompi_*"
+Each time you want to use the environment in the future, again run:
+```bash
+mamba activate e3sm-unified
 ```
 
- The following package is only available for linux and not OSX:
- - zstash
-
 For the full list of packages in the current version of the metapackages, see:
 https://github.com/E3SM-Project/e3sm-unified/blob/master/recipes/e3sm-unified/meta.yaml