xESMF - Python for climatology, oceanograpy and atmospheric science

xESMF

Universal Regridder for Geospatial Data

xESMF is a Python package for regridding. It is

Powerful: It uses ESMF/ESMPy as backend and can regrid between general curvilinear grids with all ESMF regridding algorithms, such as bilinear, conservative and nearest neighbour.

Easy-to-use: It abstracts away ESMF’s complicated infrastructure and provides a simple, high-level API, compatible with xarray as well as basic numpy arrays.

Fast: It is faster than ESMPy’s original Fortran regridding engine in serial case, and also supports dask for out-of-core, parallel computation.

http://xesmf.readthedocs.io/

Changing the way we look at Earth data with xESMF: | by Raphael Dussin | pangeo | Oct, 2020 | Medium

https://medium.com/pangeo/changing-the-way-you-look-at-earth-data-with-xesmf-ee55d0b380e5

Examples

Lazy regridding with reusable weights (xESMF pattern)

Precompute weights once; reuse them lazily across variables and time slices.

code:python

import xesmf as xe

regridder = xe.Regridder(ds, target_grid, "bilinear", reuse_weights=True)

theta_regridded = regridder(ds"thetao") # lazy if input is dask-backed

Store weights on disk to amortize setup cost across experiments