Effective inflow layer, etc.

[dopplershift]

Supercell composite needs effective_storm_helicity and effective_shear. From @mwilson14:

In this case, I think that effective storm-relative helicity is SRH computed over the depth of the effective inflow layer (the layer where parcels have > 100 J/kg CAPE and CIN weaker than -250 J/kg), and effective shear was supposed to be the bulk shear from the effective inflow base (the closest parcel to the surface that meets the effective inflow layer criteria listed above) up to 50 % of the most-unstable parcel's equilibrium level height.

Also noted by @dcamron in this Stack Overflow question from Thompson et al. 2007:

ESRH is the SRH calculated within the "effective storm inflow layer", which is the lowest vertical region of a storm defined by a lower boundary of a parcel characteristics CAPE >= 100 J/kg and CIN >= -250 J/kg, continuing upward until either of these criteria are no longer met. EBS is the bulk shear of a storm normalized over its depth instead of a standard vertical extent.

We could use calculations to facilitate this.

[michaelsessa]

Any progress in implementing effective layer calculations?

[dopplershift]

None that I am aware of. Would be happy to see a motivated (and knowledgable) community member pick this up!

[dopplershift]

There's the beginning of an implementation in the Sounding_Calculations.py example added in #2629. We can look at moving that into the library proper at some point in the future.