Search found 9 matches

by zhiguoMEI
Tue Aug 09, 2022 12:47 pm
Forum: ROMS Discussion
Topic: different salt and temp result between turn on and turn off T_PASSIVE
Replies: 2
Views: 684

Re: Undulatory salt and temp if defiene T_PASSIVE

Here is the log file with passive tracer turned on(log-1999_dye.log) and turned off(log-1999.log)
The results left me wondering if the passive tracer switch would affect the temperature and salinity calculations, and aren't they calculated separately?
by zhiguoMEI
Tue Aug 09, 2022 12:44 pm
Forum: ROMS Discussion
Topic: different salt and temp result between turn on and turn off T_PASSIVE
Replies: 2
Views: 684

Re: Undulatory salt and temp if defiene T_PASSIVE

After one month simulated the results are obviously different between Passive tracer and without passive tracer. Surface salinity appears to ripple near the boundary and in the middle of the model region when the T_PASSIVE switch is turned on and disappeared after the switch is turned off. Surface s...
by zhiguoMEI
Tue Aug 09, 2022 12:33 pm
Forum: ROMS Discussion
Topic: different salt and temp result between turn on and turn off T_PASSIVE
Replies: 2
Views: 684

different salt and temp result between turn on and turn off T_PASSIVE

:D Hi everyone! I just find a problem if turn on the T_PASSIVE CPP option. I have a Western Pacific model based on ROMS (version 3.9) with a resolution of ~5.5km. I chose 4-th order centered advection for tracers and moment. The model had run for 5 years successfully. I want to add passive tracers a...
by zhiguoMEI
Tue Dec 08, 2020 5:05 am
Forum: ROMS Discussion
Topic: Temperature blowing up near boundary while use nudge
Replies: 4
Views: 1804

Re: Temperature blowing up near boundary while use nudge

If the boundary is at the edge of the plot, you want to mask out those two purple points. Otherwise you should unmask the point just north of them. At the boundary, the algorithm is using values a few gridpoints in from the boundary so they all have to be wet for it to be well-behaved. Hi Kate! I m...
by zhiguoMEI
Mon Dec 07, 2020 5:27 am
Forum: ROMS Discussion
Topic: Temperature blowing up near boundary while use nudge
Replies: 4
Views: 1804

Re: Temperature blowing up near boundary while use nudge

If the boundary is at the edge of the plot, you want to mask out those two purple points. Otherwise you should unmask the point just north of them. At the boundary, the algorithm is using values a few gridpoints in from the boundary so they all have to be wet for it to be well-behaved. Thanks Kate ...
by zhiguoMEI
Sun Dec 06, 2020 1:34 pm
Forum: ROMS Discussion
Topic: Temperature blowing up near boundary while use nudge
Replies: 4
Views: 1804

Temperature blowing up near boundary while use nudge

Hello everyone! I was run a west pacific model ,and I want to use nudge to imporve the performance of bottom temp and salt I made the nudge.nc file by myself. I set the tracer_NudgeCoef as 1day at the bottom level and decrease to 1/30 day at the 5th level. But after the 5-month run, an abnormal incr...
by zhiguoMEI
Tue Nov 05, 2019 11:07 am
Forum: ROMS Discussion
Topic: Abnormal low temperature in bottom layer
Replies: 3
Views: 1718

Re: Abnormal low temperature in bottome layer

Hello! If the area is very shallow the problem can be the heat flux, you can try use the forcing and Qcorrection instead of Bulk Fluxes. I had a very similar problem in a shallow domain, the temperature was very high or very low. Thank you for your help ! I check the bathymetry where this problem h...
by zhiguoMEI
Tue Nov 05, 2019 10:53 am
Forum: ROMS Discussion
Topic: Abnormal low temperature in bottom layer
Replies: 3
Views: 1718

Re: Abnormal low temperature in bottome layer

Thank you for your help ! I check the bathymetry where this problem happen. Below is a temperature slice along 25.7N near Taiwan island.Image. The depth of low temperature region is below 1600 meters , I don't think this is too shallow.
by zhiguoMEI
Mon Nov 04, 2019 2:10 pm
Forum: ROMS Discussion
Topic: Abnormal low temperature in bottom layer
Replies: 3
Views: 1718

Abnormal low temperature in bottom layer

Hi everyone ! Recently I got a problem with my ROMS-only model.The temperature in bottom layer was below -10 deg C and this abnormal temp happened only in the slope region. If I change my CPP define TS_C4HADVCTION into TS_U3HADVTION this problem just disappear but other problems appear.Could you ple...