Add a warning if SUMMA performs a relative humidity correction?

[wknoben]

Feature Requests

summa/build/source/engine/derivforce.f90

Lines 276 to 282 in fa9adf8

	! compute relative humidity (-)
	relhum = SPHM2RELHM(spechum, airpres, airtemp)
	! if relative humidity exceeds saturation, then set relative and specific humidity to saturation
	if(relhum > 1._rkind)then
	relhum = 1._rkind
	spechum = RELHM2SPHM(relhum, airpres, airtemp)
	end if

Might be helpful to users if this correction also prints a warning, so that it becomes easier to track what happens to the provided forcing data

[andywood]

I support adding a warning if it can be included under a --verbose option for output. Even in that case, it might be good to restrict or summarize it in some way so that it doesn't have the potential to print every timestep and every hru, which would be unnecessary. Perhaps create an end-of-run warning message listing the first 10 occurrences (hru, date, values).

SUMMA could even write such warnings to a file rather than merge them with screen output -- such as the 'runinfo' file which is created at the start to make sure the output directory exists. Rather than close that file, use it to collect certain types of warnings that a user could see if they wanted to.