Ocean Modeling Discussion

I used the CIMP BCC data to create ini and bry files , which came from the same dataset.

According to rtoste's suggestion, I recreated the initial and boundary files from CMIP for my simulation, then it works well without blow-up problem.

Yes, I'm using the initial condition from CMIP.

By comparing the u/v from CMIP and SODA, I found u/v from CMIP is about 0.5m/s smaller than soda,
Is it possible that the smaller current speed courses the blow-up?

Yes, you are right. there are strong current speed at the open boundaries,and which course the zeta is large. current is shown as following. The values for LBC, I guess, are these: EAST_FSCHAPMAN Eastern edge, free-surface, Chapman condition. EAST_M2FLATHER Eastern edge, 2D momentum, Flather ...

zeta from restart file is extremely abnormal at open boundary ,

u/v are unreasonable throughout the region.

temp/salt are plausible.

figures as shown below.

I used ROMS3.5 and modified the program from CROCO ROMSTOOLS https://www.croco-ocean.org/ to create OBC file. It seems the blow-up did not happen at the boundary. My grid resolution is 0289x0379x0020, with open boundary at the south and the east, the blow-up message as shown below. STEP Day HH:MM:SS ...

Hi, Recently I used CMIP6 BCC results to do some future projection business. When the open boundary created by CMIP BCC ocean data, there is a blowing-up problem. However, changing the boundary file from SODA data , the model is able to run successfully . For future projection, maybe it's ...

Does this advice also suit for ROMS3.5 ? I use ROMS3.5 BULK_FLUXES with model resolution finer than 1/4 degree,and recently I confused why the timeseries of my model results doesn't show trend and interannual variance although it was forced by monthly forcings. Maybe I should use relative winds ...

Recently I simulate the model under CMIP6 forcing, there are a question about the TIME_REF . The Calendar for CMIP6 downloaded variables is "365 days" , however that is "365.25days" for TIME_REF = 0 in ROMS .in file。 what should do to match the ROMS calendar and CMIP6 calendar? I would really a ...

Hi everyone, When I plot monthly area-averged model results, there are a confused problem where zeta in Febuary always higher than expected . This phenomenon appeares in every year while results in other month are normal. ROMS3.7 for climatology(SODA , COADS monthly dataset), use FORCING, ROMS3.5 ...

Thank all you for giving valuable guides.

Now I begin to doubt my simulation steps. My task is to simulate sea level height in future 50 or 100 years. So I separate it into three steps: First, simulating the climatology condition for my study area until model is stable. Forcing fields in this step are come from climatology datasets. Second ...

When checked my input fields, I find another possible mistake. As arango said activate LONGWAVE_OUT and provide downward longwave radiation so bulk_flux will subtract the outgoing IR by using ROMS surface temperature (K), infrared emissivity, and Stefan-Boltzmann constant. I find my input fileds the ...

My current strategy is to activate LONGWAVE_OUT and provide downward longwave radiation so bulk_flux will subtract the outgoing IR by using ROMS surface temperature ( K ), infrared emissivity, and Stefan-Boltzmann constant. I also use downward shortwave radiation and I activate COOL_SKIN to correct ...

Turning on BULK_FLUX is one step. What are you using to provide the atmospheric fields? How frequently? You have: DIURNAL_SRFLUX Modulate shortwave radiation by the local diurnal cycle. which I would not use if the atmospheric fields are say three-hourly. Thanks a lot for your reply. I uesed Uwind ...

At first, I used Forcing Flux input files to simulate my model. Comparing with SODA Climatology, The temperature results are not so good(shown below). Then be advised to using Bulk Flux input files, I open #define BULK_FLUXES in .h files. The result in the first month is close to SODA, but it gets ...

Hi. Firstly thank you for your attention on my question.I am a green at the roms. Although i succeed in make files ——grd.nc, frc.nc, clm.nc , bry.nc and ini.nc , I am not sure if those files are right. I run my model ,but there are consistently Blowing Up problems.I tell what I have done in detail, h ...