Ability to regrid global data to a cartesian region

[kmdeck]

Is your feature request related to a problem? Please describe. We would like to support the following regridding capabilities:

• on sphere 3D or 2D [ available]
• on column (1D) [available]
• in a box (3D or 2D) [available, but needs some interface work]

For the latter, we would want a way to specify the lat/lon boundaries of the box of interest, and use a net cdf file with data at lat/lon/z points which encompass the region we want (or use extrapolation to get outside of boundaries).

The latter is not an immediate priority - it is for regional simulations, but global and fluxnet sims are our priority for now.

A related version would be to run multiple independent columns as part of a single box domain, e.g. for parallelizing fluxnet simulations across multiple sites. This doesnt need regridding of parameters though, but would need a way of assigning a lat/lon to each point, and using that to pull out the correct ERA5 forcing, spatially varying parameters, etc. at those locations.

We also have:

• conservative remapping on surface sphere (available, tempest remap) - may not be needed for land standalone runs

[Sbozzolo]

I think we have this now, right?

EDIT: Maybe we only need a little bit of interface code

[kmdeck]

thanks! I will edit the description