IEEE_UNDERFLOW_FLAG IEEE_DENORMAL

[jsodhi]

Hi,

I am using MPASv5.2 Core=Atmosphere and Precision=single.
The log.0000.err contains the following


********************************************************
Finished running the atmosphere core
********************************************************
Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL



Attached are the log.0000.err and log.0000.out files.
Could anyone point out if there's any error or issue with model run.

regards,
jsodhi

[MPAS-Atmosphere Help]

Hi, Jsodhi.

Everything looks fine to me in your log files. The floating-point underflow and denormal exceptions reported at the end of the log.0000.err file are generally harmless, and are just reported because the Fortran 2003 standard that all floating-point exceptions that are signaling when a Fortran STOP statement is reached are reported. It's not uncommon to encounter very small, denormal floating-point numbers in a simulation, and these can sometimes underflow to zero; in case you're interested, you can check out https://en.wikipedia.org/wiki/Denormal_number for some further information on denormal numbers.

Kind regards,

Michael