[wrfems] temperatures crashing during night over water

Bryan Mroczka Bryan.Mroczka at noaa.gov
Thu Oct 27 11:05:02 MDT 2011

I have been playing around with the EMS3.2beta release and have had some 
issues with my overnight 2meter temperatures over water/ocean. As soon 
as the model thinks the sun has set, it begins a rapid downward trend in 
the temps over the water. This eventually leads in a short time to some 
very unrealistic values. The issue seems to be related to the SST_SKIN 
variable. The default in the run_physics.conf file states that this 
should be set to 1. However, when I reset this variable to 0, the issue 
of low level temps over water goes away. I have tried several different 
short/long radiation options, always with basically the same result.

Can anyone think of why this may be occurring with the SST_SKIN=1 
variable set. I have attached my run_physics.conf file in hopes that 
someone might see a conflict in my configuration.

WFO Tallahassee, FL
_Bryan Mroczka_
bryan.mroczka at noaa.gov
National Weather Service - Tallahassee, FL
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