Add note for Windows installation. ESMPy is not installable on Windows.

Author: JiaweiZhuang

README.md

@@ -45,13 +45,15 @@ Clone this repository so you have all the notebooks and data files to work with:
 $ git clone https://github.com/JiaweiZhuang/GEOSChem-python-tutorial.git
 ```
 
-Install required packages to an isolated environment (which allows you to manage different versions of packages without affecting each other):
+Install required packages into an isolated environment (which allows you to manage different versions of packages without affecting each other):
 
 ```
 $ conda env create -vv -n geo -f geoschem-python-tutorial/environment.yml
 $ source activate geo
 ```
 
+**Windows users** should use [environment_windows.yml](./environment_windows.yml) instead.
+
 You can use a different name other than `geo` for the environment. `-vv` prints more message so the installation won't look like getting stuck.
 
 Finally, start the Jupyter program

environment_windows.yml

@@ -0,0 +1,17 @@
+channels:
+    - defaults
+    - conda-forge
+dependencies:
+    - python=3.6    # Python version 3.6
+    - cython        # Python <-> C interfacing
+    - cartopy       # Geographic plotting toolkit
+    - dask          # Parallel processing library
+    - jupyter       # Jupyter federation architecture
+    - jupyterlab    # next-generation Jupyter
+    - matplotlib    # 2D plotting library
+    - netcdf4       # netcdf4 Python API, backend for xarray
+    - scipy         # Common math/stats/science functions
+    - scikit-learn  # Machine learning library
+    - seaborn       # Statistical visualizations
+    - xarray        # the major tool to work with NetCDF data
+    - xbpch         # Interface for bpch output files