New gravity wave source - "moving mountains"

[JulioTBacmeister]

Issue Type

Other (please describe below)

Issue Description

This issue will implement a new non-orographic source of gravity waves, known as the "moving mountain" source. Air flows over convective updrafts and is deflected upward producing a gravity wave. This source may help reduce existing biases in the southern hemisphere stratosphere.

Will this change answers?

Yes

Will you be implementing this yourself?

Yes