Search found 10 matches

by yangwu1215
Thu Dec 17, 2020 3:22 am
Forum: ROMS Problems
Topic: ROMS<kshedstrom version> question about the "Smagorinsky-like diffusion""
Replies: 0
Views: 2710

ROMS<kshedstrom version> question about the "Smagorinsky-like diffusion""

I'm recently studying the kshedstrom version <https://github.com/kshedstrom/roms/tree/master>. The model works well with the <define UV_VIS4, define TS_DIF4>. However, if I activate Smagorinsky-like diffusion <undef UV_VIS4, undef TS_DIF4, define UV_VIS2, define TS_DIF2, define UV_SMAGORINSKY ...
by yangwu1215
Wed Nov 11, 2020 5:27 am
Forum: ROMS Problems
Topic: ROMS<kshedstrom version> question about the "zeta <free surface elevation>"
Replies: 4
Views: 2789

Re: ROMS<kshedstrom version> question about the "zeta <free surface elevation>"

Compared with POM, ROMS is more applicable for coupling with the other models <WRF, CICE, SWAN>, which is more suitbale for my future research on the lake-air interactions. For now, both POM and ROMS can well capture the lake temperature, while their performances in simulating the free-surface ...
by yangwu1215
Wed Nov 11, 2020 2:49 am
Forum: ROMS Problems
Topic: ROMS<kshedstrom version> question about the "zeta <free surface elevation>"
Replies: 4
Views: 2789

Re: ROMS<kshedstrom version> question about the "zeta <free surface elevation>"

The red and wet contours in the right panel both denote the free-surface variations <zeta> in the whole simulation area. The following is my model domain and Lake Nam Co depth. model domain and lake depth.png In winter, the currents mainly flow in response to the strong surface winds, which mainly ...
by yangwu1215
Tue Nov 10, 2020 9:09 am
Forum: ROMS Problems
Topic: ROMS<kshedstrom version> question about the "zeta <free surface elevation>"
Replies: 4
Views: 2789

ROMS<kshedstrom version> question about the "zeta <free surface elevation>"

I'm recently studying the kshedstrom version <https://github.com/kshedstrom/roms/tree/master>, and trying to apply it on a freshwater lake. I plot the evolutions of the 5-day averaged depth-averaged currents <ubar, vbar, vector>, free surface elevation <zeta, contour>, and water temperature along a ...
by yangwu1215
Sat Nov 07, 2020 2:33 am
Forum: ROMS Problems
Topic: ROMS<kshedstrom version>blowing up problems with the "specific heat for seawater" "
Replies: 3
Views: 2467

Re: ROMS<kshedstrom version>blowing up problems with the "specific heat for seawater" "

Thanks, Kate! (1) The model works if I reduce the timestep, 10s for the internal mode and 2s for the external mode. (2) I activate the "UV_LOGDRAG" to use the logarithmic bottom stress in <set_vbc.F>. The maximum and minimum value for drag coefficient <Cdb> are 0.5 and 0.000001, just the default ...
by yangwu1215
Fri Nov 06, 2020 12:34 pm
Forum: ROMS Problems
Topic: ROMS<kshedstrom version>blowing up problems with the "specific heat for seawater" "
Replies: 3
Views: 2467

ROMS<kshedstrom version>blowing up problems with the "specific heat for seawater" "

I'm recently studying the kshedstrom version <https://github.com/kshedstrom/roms/tree/master>, and trying to apply it on a freshwater lake. The model works with the Cp=3985Joules/kg/degC, which denotes the specific heat for seawater in Subrouting <Modules/mod_scalars.F>. However, if I increase Cp to ...
by yangwu1215
Thu Oct 08, 2020 4:54 am
Forum: ROMS Problems
Topic: ROMS<kshedstrom version> blowing-up with ' REASON: KEchar = NaN, PEchar = NaN' report
Replies: 2
Views: 2967

Re: ROMS<kshedstrom version> blowing-up with ' REASON: KEchar = NaN, PEchar = NaN' report

Thank for for the suggestion. The model works if I reduce the dt from 300s to 10s.
by yangwu1215
Wed Oct 07, 2020 2:10 pm
Forum: ROMS Problems
Topic: ROMS<kshedstrom version> blowing-up with ' REASON: KEchar = NaN, PEchar = NaN' report
Replies: 2
Views: 2967

ROMS<kshedstrom version> blowing-up with ' REASON: KEchar = NaN, PEchar = NaN' report

I'm recently studying the kshedstrom version <https://github.com/kshedstrom/roms/tree/master>, and trying to set the vertical s-coordinate manually. However, if I set the s-coordinate with an intersified surface layer, the model blow up with the 'REASON: KEchar = NaN, PEchar = NaN' report. The ...
by yangwu1215
Thu Sep 17, 2020 3:15 am
Forum: ROMS Problems
Topic: ROMS<kshedstrom version> blow at the fist timestep
Replies: 9
Views: 12732

Re: ROMS<kshedstrom version> blow at the fist timestep

Great thank! The problem has bees solved! :)
by yangwu1215
Mon Sep 14, 2020 10:08 am
Forum: ROMS Problems
Topic: ROMS<kshedstrom version> blow at the fist timestep
Replies: 9
Views: 12732

ROMS<kshedstrom version> blow at the fist timestep

I'm recently studying the kshedstrom version <https://github.com/kshedstrom/roms/tree/master>, and the model blow up at the first timestep. However, the same input 'grid.nc, initial conditions, and atmospheric forcings' can work with the roms-3.7 version. The following is the running log <intelmpi ...