Hi, i have some problems.

General scientific issues regarding ROMS

Moderators: arango, robertson

Post Reply
Message
Author
kobl1201
Posts: 60
Joined: Tue Nov 04, 2014 8:29 pm
Location: Kongju National Universty

Hi, i have some problems.

#1 Unread post by kobl1201 »

Hello~

i have some problems. When i run the ROMS model, the currets flow along the boundary.

As time passed, the results varied as follows :
사본 -그림1.gif
사본 -그림1.gif (13.25 KiB) Viewed 6618 times
It seems the current can't go out the northern and eastern boundaris.

I hope that outflow is much stronger than now.

The model region is east/japan sea.

Please help me.

User avatar
kate
Posts: 4091
Joined: Wed Jul 02, 2003 5:29 pm
Location: CFOS/UAF, USA

Re: Hi, i have some problems.

#2 Unread post by kate »

You haven't told us anything about what boundary conditions you are using. Do they need external values? If so, where are those coming from and do they look reasonable?

kobl1201
Posts: 60
Joined: Tue Nov 04, 2014 8:29 pm
Location: Kongju National Universty

Re: Hi, i have some problems.

#3 Unread post by kobl1201 »

Sorry Kate.

I used HYCOM data for boundary condition and initial data.

The boundary condition applied every 1 day.

Usually, currents in the north region flow easternward. However, my result showed converse.

User avatar
kate
Posts: 4091
Joined: Wed Jul 02, 2003 5:29 pm
Location: CFOS/UAF, USA

Re: Hi, i have some problems.

#4 Unread post by kate »

What values of LBC are you using?

kobl1201
Posts: 60
Joined: Tue Nov 04, 2014 8:29 pm
Location: Kongju National Universty

Re: Hi, i have some problems.

#5 Unread post by kobl1201 »

Hi Kate

I set up the model like this.
ocean_ub_3k_new.in
(117.57 KiB) Downloaded 455 times
I ,also applied relaxation method and sponge layer.

However, this methods didn't slove this problems

User avatar
kate
Posts: 4091
Joined: Wed Jul 02, 2003 5:29 pm
Location: CFOS/UAF, USA

Re: Hi, i have some problems.

#6 Unread post by kate »

Code: Select all

   LBC(isFsur) ==   Clo     Cha     Cha     Cha \         ! free-surface
                    Nes     Nes     Nes     Nes
   LBC(isUbar) ==   Clo     Fla     Fla     Fla \        ! 2D U-momentum
                    Nes     Nes     Nes     Nes
Perhaps try again without the "! free-surface" and other such comments? These comments in continued lines can confuse ROMS.

moritz.wandres
Posts: 21
Joined: Fri Mar 15, 2013 1:30 pm
Location: UWA Oceans Institute

Re: Hi, i have some problems.

#7 Unread post by moritz.wandres »

I had a lot of boundary currents like this in the beginning which were essentially due to erroneous boundary forcing. Also I noticed you had -

M2NUDG == 0.0d0 ! days
M3NUDG == 0.0d0 ! days
Have you tried playing around with the nudging parameters?

kobl1201
Posts: 60
Joined: Tue Nov 04, 2014 8:29 pm
Location: Kongju National Universty

Re: Hi, i have some problems.

#8 Unread post by kobl1201 »

Hello ~

i removed things such as !free-surface and then modified M2NUDG == 0.0d0 ! days, M3NUDG == 0.0d0 ! days. However, the results still showed same things.

Do you have other ideas??

Please help me

Post Reply