Search found 35 matches

by mengqingjun
Tue Nov 11, 2014 1:14 am
Forum: ROMS Discussion
Topic: About disspiation of turbulent kinetic energy
Replies: 0
Views: 1001

About disspiation of turbulent kinetic energy

Hi ROMS's users! I want to compute the disspiation of turbulent kinetic energy using ROMS outputs.I used Mellor-Yamada turbulence close schemes. I have ROMS output tke(oceantime,s_w,eta_rho,xi_rho) and gls(oceantime,s_w,eta_rho,xi_rho) . Now I have a question that if q^2=sqrt(2*tke) and l = gls/tke ...
by mengqingjun
Sat Oct 25, 2014 5:17 am
Forum: ROMS Discussion
Topic: 'zeta' in ROMS
Replies: 9
Views: 67535

Re: 'zeta' in ROMS

ROMS zeta is "absolute SSH" in the sense that it includes time mean and time varying SSH with respect to a datum (i.e. zeta=0) that is a geopotential surface, i.e. if zeta=constant there is no associated pressure gradient force. Altimetrists do not say "absolute" SSH so let me clarify: In altimetry...
by mengqingjun
Sat Oct 25, 2014 3:04 am
Forum: ROMS Discussion
Topic: About ROMS Zeta
Replies: 1
Views: 1385

Re: About ROMS Zeta

Respected ROMS Users, In some earlier posts I found that ROMS Zeta is absolute SSH which can be considered equivalent to satellite derived MDT + SLA , where MDT is mean dynamic topography and SLA is Sea level anomaly. In AVISO site I found MADT, which is map of absolute dynamic topography is again ...
by mengqingjun
Mon Oct 20, 2014 1:06 am
Forum: ROMS Discussion
Topic: Surface heat flux. Double the count?
Replies: 18
Views: 9125

Re: Surface heat flux. Double the count?

Ok,thank you wilkin for your replies! I am modeling the sea over shallow sea shelf.I didn't define BULK_FLUXS,I have very shallow water and therefore very thin surface cells.So I need to define SOLAR_SOURCE option as your advives, no matter whether I use MY25_MIXING nor other vertival mixing schemes...
by mengqingjun
Sun Oct 19, 2014 2:53 pm
Forum: ROMS Discussion
Topic: Surface heat flux. Double the count?
Replies: 18
Views: 9125

Re: Surface heat flux. Double the count?

If you #define SOLAR_SOURCE then the specified net shortwave radiation is propagated vertically into the water column and absorbed internally according to a double exponential profile set by the Jerlov water type option WTYPE in ocean.in. This step is handled by routine lmd_swfrac even if the KPP (...
by mengqingjun
Sat Jan 04, 2014 3:41 pm
Forum: ROMS Discussion
Topic: Strange Oscillation
Replies: 7
Views: 2325

Re: Strange Oscillation

Thank you Professor Arango for your suggestions ! Firstly,about instability. physical instabilities (barotropic, baroclinic, mixed, etc) and they are usually associated with eddies .There are no obvious developing eddies in my domain,the truth is that there exist strange oscillations(the surface tot...
by mengqingjun
Fri Jan 03, 2014 2:22 pm
Forum: ROMS Discussion
Topic: Strange Oscillation
Replies: 7
Views: 2325

Re: Strange Oscillation

I have made a test forced only by the wind stress(3 hourly ecmwf) and output the results every 3 hour. ps. wind_stress_08th.gif is a gif animation of the wind stess in Aug; Total_Velocity_Surface_Aug.gif is a gif animation of the surface Total Velocity in Aug. The current looks like so unstable and ...
by mengqingjun
Fri Jan 03, 2014 1:45 pm
Forum: ROMS Discussion
Topic: Strange Oscillation
Replies: 7
Views: 2325

Re: Strange Oscillation

Thank you LiangPeng for your reply! I did not test the oscillation because I think the oscillation is a little bit strange...
The inertial oscillation...um...The inertial oscillations fill all my domain? I have no idea...
by mengqingjun
Thu Jan 02, 2014 1:54 pm
Forum: ROMS Bugs
Topic: forcing the ROMS with ERA interim
Replies: 17
Views: 17324

Re: forcing the ROMS with ERA interim

Hi redhat,I think if you are running a climatology case, you can use a cycle_length attribute, if you are running a real-time case, you can start your model from 2008-01-01_01:30:00. Whatever,try and see,good luck!
by mengqingjun
Tue Dec 24, 2013 3:00 am
Forum: ROMS Discussion
Topic: Strange Oscillation
Replies: 7
Views: 2325

Re: Strange Oscillation

Thank you Kate for reply ! The wind can excite inertial oscillations, yes, but I don't think the strange oscillations(the velocity is going round and round...) in my application are resonable. The velocity showed dramatic changes....After three years, I think the barotropic adjustments caused by the...
by mengqingjun
Mon Dec 23, 2013 2:44 pm
Forum: ROMS Discussion
Topic: Strange Oscillation
Replies: 7
Views: 2325

Strange Oscillation

Recently I am similating a real-time ocean circulation case of East China Sea. I make initial condiations from HYCOM model on 2012.01.01 and the daily boundary condiations are also made from HYCOM model from 2012.01.01 to 2012.12.31. The forcing files are made from ECMWF datasets every 3 hours(using...
by mengqingjun
Thu Oct 31, 2013 3:09 pm
Forum: ROMS Discussion
Topic: Surface heat flux. Double the count?
Replies: 18
Views: 9125

Re: Surface heat flux. Double the count?

Hi d.kobashi~ :D I tried SOLAR_SOURCE and QCORRECTION to adjust heat flux (satellite-based SST). High SST/sub-surface temperature still persists. I am wondering how you gave the values of dQdSST to ROMS ? I meet a similar problem like yours. Without BULK_FLUXS,ROMS need only sstr,svstr,shflux,swflux...
by mengqingjun
Tue Oct 22, 2013 12:37 am
Forum: ROMS Discussion
Topic: about atmospheric forcing
Replies: 5
Views: 2580

Re: about atmospheric forcing

Thank you kate for your replies ! I turn off the BULK_FLUXS, and as arango said, ROMS needs shflux, swflux, swrad (with some CPP options), sustr, and svstr as the atmospheric forcing. I am wondering we have already had shflux, then what swrad is used for ?
by mengqingjun
Mon Oct 21, 2013 11:37 am
Forum: ROMS Discussion
Topic: about atmospheric forcing
Replies: 5
Views: 2580

about atmospheric forcing

I have a question that if I don't active BULK_FLUXS in .h file, as arango wrote in https://www.myroms.org/forum/viewtopic.php?f=30&t=3003&hilit=boundary+conditions that ROMS just needs shflux, swflux, swrad (with some CPP options), sustr, and svstr. .I want to apply the surface forcing without BULK_...
by mengqingjun
Sat Sep 07, 2013 2:06 pm
Forum: ROMS Discussion
Topic: cycle_length problem
Replies: 1
Views: 1035

cycle_length problem

When you say monthly, do you mean you have each individual month or do you have a generic January that is for all Januaries? If it's the first, you don't want to set cycle_length at all. If it's the second, I don't see that 365.25 is going to be so very terrible. It's not like you are picking up th...
by mengqingjun
Wed Sep 04, 2013 5:46 am
Forum: ROMS Problems
Topic: cycle_length for non-360days/yr monthly forcing files?
Replies: 9
Views: 5727

Re: cycle_length for non-360days/yr monthly forcing files?

When you say monthly, do you mean you have each individual month or do you have a generic January that is for all Januaries? If it's the first, you don't want to set cycle_length at all. If it's the second, I don't see that 365.25 is going to be so very terrible. It's not like you are picking up th...
by mengqingjun
Tue Aug 27, 2013 2:52 am
Forum: ROMS Discussion
Topic: Confusion about abnormal flow and great temperature gradient
Replies: 6
Views: 2678

Re: Confusion about abnormal flow and great temperature grad

Thank you Kate for reply ! in fact your nudging on outflow is stronger than my nudging on inflow, which could be trouble I see, I will try your's set. I'm not sure it's being used for anything since you don't have TCLM_NUDGING or similar turned on If I turn on TCLM_NUDGING or similar, ROMS will use ...
by mengqingjun
Tue Aug 27, 2013 2:28 am
Forum: ROMS Discussion
Topic: Confusion about abnormal flow and great temperature gradient
Replies: 6
Views: 2678

Re: Confusion about abnormal flow and great temperature grad

Thank you rduran for reply! A monthly BC is not a good idea ,do you mean that a daily BC will do better for a ten year model ? Mybe I will try a daily BC... how come you have temperatures as low as 0.4 I think the temperature could reach as low as 0.4, may even be negtive one...I think it is reasona...
by mengqingjun
Sat Aug 24, 2013 11:44 am
Forum: ROMS Discussion
Topic: Confusion about abnormal flow and great temperature gradient
Replies: 6
Views: 2678

Confusion about abnormal flow and great temperature gradient

Hi everyboday, I am running a real application without tide forcing on East China Sea. The model resultion is 1/12 degree. I run my model for 10 years in two cases: 1.The model is forced only by the boundary file *_bry.nc and it is interpolated from the HYCOM 1/12 degree results. The variables in th...
by mengqingjun
Thu Jul 25, 2013 3:01 pm
Forum: ROMS Discussion
Topic: do i have to add the UV_TIDES for a real case?
Replies: 7
Views: 3447

Re: do i have to add the UV_TIDES for a real case?

Thank you Kate very much. It really helps :D !
by mengqingjun
Wed Jul 24, 2013 8:58 am
Forum: ROMS Discussion
Topic: do i have to add the UV_TIDES for a real case?
Replies: 7
Views: 3447

Re: do i have to add the UV_TIDES for a real case?

If you use a Flather condition to specify ssh only with a propagating wave, you will only get half of the wave you expect. Using reduced physics might help this a bit, but you should do some experiments to be sure. I am running a real case which only has the tidal forcing with M2,S2,K1,O1;I provide...
by mengqingjun
Sun May 19, 2013 1:19 pm
Forum: ROMS Discussion
Topic: Confusion about Nudging Coefficient
Replies: 16
Views: 6550

Re: Confusion about Nudging Coefficient

Thank you John for your quick replies !
Except for SRELAXATION TCLM_NUDGING ,are there any other else CPP definations that will compile the file ana_nudgcoef.h?
Coulkd I think that even some files for examole ana_nudgcoef.h was compiled ,they may not be used when run the application ?
Thanks! :)
by mengqingjun
Sun May 19, 2013 1:02 pm
Forum: ROMS Discussion
Topic: Confusion about DAMEE4 test
Replies: 8
Views: 2344

Re: Confusion about DAMEE4 test

Oh,you mean that the Tnudg value in ocean.in is first read by the file read_phypar.F and the Tnudg value is used the inversed value ! I see, thank you Kate! :D ps. Except for TCLIMATOLOGY TCLM_NUDGING that will compile ana_nudgcoef.h,what other else CPP definitations that will compile ana_nudgcoef.h...
by mengqingjun
Sun May 19, 2013 6:03 am
Forum: ROMS Discussion
Topic: Confusion about Nudging Coefficient
Replies: 16
Views: 6550

Re: Confusion about Nudging Coefficient

ps. Are there some CPP definitations that could control wheather the file ana_nudgcoef.h will be compiled or not ?
by mengqingjun
Sun May 19, 2013 3:59 am
Forum: ROMS Discussion
Topic: Confusion about Nudging Coefficient
Replies: 16
Views: 6550

Re: Confusion about Nudging Coefficient

Sorry, I make a mistake ,I used LBC(): LBC(isFsur) == Clo Clo Clo Clo ! free-surface LBC(isUbar) == Clo Clo Clo Clo ! 2D U-momentum LBC(isVbar) == Clo Clo Clo Clo ! 2D V-momentum LBC(isUvel) == Clo Clo Clo Clo ! 3D U-momentum LBC(isVvel) == Clo Clo Clo Clo ! 3D V-momentum LBC(isMtke) == Clo Clo Clo ...
by mengqingjun
Sat May 18, 2013 3:27 pm
Forum: ROMS Discussion
Topic: Confusion about Nudging Coefficient
Replies: 16
Views: 6550

Re: Confusion about Nudging Coefficient

ps. I mean that how the ana_nudgcoef.h was used ?
by mengqingjun
Sat May 18, 2013 3:17 pm
Forum: ROMS Discussion
Topic: Confusion about DAMEE4 test
Replies: 8
Views: 2344

Re: Confusion about DAMEE4 test

It seems that the longer Nudging time scale (days) the weaker the nudging. But in ana_nudgcoef.h: IF (DOMAIN(ng)%SouthWest_Test(tile)) THEN Tobc_out(itrc,ng,iwest)=Tnudg(itrc,ng) Tobc_in (itrc,ng,iwest)=obcfac(ng)*Tnudg(itrc,ng) END IF As recommended in ocean.in, OBCFAC > 1 ; at the same time, Tnudg...
by mengqingjun
Sat May 18, 2013 2:53 pm
Forum: ROMS Discussion
Topic: Confusion about Nudging Coefficient
Replies: 16
Views: 6550

Re: Confusion about Nudging Coefficient

I am still confused about the nudging coefficient. In my application I set LBC as follows: ad_LBC(isFsur) == Clo Clo Clo Clo ! free-surface ad_LBC(isUbar) == Clo Clo Clo Clo ! 2D U-momentum ad_LBC(isVbar) == Clo Clo Clo Clo ! 2D U-momentum ad_LBC(isUvel) == Clo Clo Clo Clo ! 3D U-momentum ad_LBC(isV...
by mengqingjun
Wed May 15, 2013 12:52 am
Forum: ROMS Discussion
Topic: Confusion about DAMEE4 test
Replies: 8
Views: 2344

Re: Confusion about DAMEE4 test

Thank you Kate and I will have a try !
by mengqingjun
Tue May 14, 2013 5:10 am
Forum: ROMS Discussion
Topic: Confusion about DAMEE4 test
Replies: 8
Views: 2344

Re: Confusion about DAMEE4 test

Thank you for your replies Kate !Because I am a newer to ROMS, so I want get familiar with it through runing as mang test cases as possible. There are now global ocean models which we can use for RadNud boundary conditions and any of them should lead to better behavior Could I think that the *_clm.n...
by mengqingjun
Mon May 13, 2013 3:56 pm
Forum: ROMS Discussion
Topic: Confusion about DAMEE4 test
Replies: 8
Views: 2344

Confusion about DAMEE4 test

I am testing the DAMEE_4 application in the test directory.There is no *_bry.nc inputing, and the Lateral Boundary Condition Type are all " CLO ". It is obvious that ROMS get the boundary condiations from the damee4_Lclm_b.nc. If so, I check the damee_4.h, I find that #define TCLIMATOLOGY and #defin...
by mengqingjun
Fri Mar 29, 2013 12:58 pm
Forum: ROMS Discussion
Topic: Need help regarding free surface in South China Sea
Replies: 4
Views: 1651

Re: Need help regarding free surface in South China Sea

I am wandering how you set up your grid file?
Using Seagrid,or other else?
Could you kindly tell me ?
Thank you!
by mengqingjun
Mon Mar 25, 2013 3:45 pm
Forum: ROMS Discussion
Topic: d_initial.m problem
Replies: 3
Views: 1663

d_initial.m problem

I am preparing initial input files for ROMS using the matlab scripts d_initial.m . There is "OAname = fullfile(my_root, 'Data/OA', 'oa4_lev94_feb.nc');",and I don't know how to prepare my "oa_lev94_feb.nc".It seems like the file is produced in the old fortran code. I don't know how to produce my fil...
by mengqingjun
Thu Jan 24, 2013 4:10 am
Forum: ROMS Installation
Topic: Error running Latte example
Replies: 7
Views: 4664

Re: Error running Latte example

Thank you wilkin for your reply!
I am waiting for your update of the Latte input profiles, if you have arleady made it, just let me know!
Thank you!
by mengqingjun
Sun Sep 16, 2012 7:41 am
Forum: ROMS FAQ
Topic: build.bash problem
Replies: 10
Views: 11486

Re: build.bash problem

I have the same problem. I need hellp! Thanks! I had a problem when I am compiling my ROMS downloaded via the svn。I used Cygwin.When I input the commend:"./build.bash",it showed: "./buid.bash: line 397 cd: /home/mengqingjun/ocean/repository/trunk: No such file or directory meke:***没有规则可以创建目标“clean”....