WhatIs: the ok hines parameter

The "ok_hines" parameter is a logical flag, i.e. to be set to "y" (or equivalently ".true.") or "n" (or equivalently ".false.") in the run.def file.

If on, this parametrization accounts for the effect of gravity waves in the stratosphere when the later is not represented in the GCM. This is essentially a depreciated scheme, superseded by the more recent non-orographic gravity wave parametrization (flag "ok_gwd_rando").

In practice, when running in configurations without an explicit representation of the stratosphere (i.e. with 39 model levels or less) then one should have ok_hines=y and ok_gwd_rando=n, whereas when running with the stratosphere (e.g. 79 model levels or more) then one should use ok_hines=n and ok_gwd_rando=y

03/12/2021