## What is the output of DIAGNOSTICS_TS/UV?

### What is the output of DIAGNOSTICS_TS/UV?

Hi all,

I have a question about the dia.nc file. What kind of terms does it contain?

Are those terms have simply form of the terms in N-S equations or something more complicated?

u_accel

u_hadv

u_vadv

u_cor

u_prsgrd

u_hvisc

u_vvisc

temp_rate

temp_hadv

temp_vadv

temp_hdiff

Could you tell me if it is possible to find more information on this anywhere?

Thanks a lot,

Evgeny

I have a question about the dia.nc file. What kind of terms does it contain?

Are those terms have simply form of the terms in N-S equations or something more complicated?

u_accel

u_hadv

u_vadv

u_cor

u_prsgrd

u_hvisc

u_vvisc

temp_rate

temp_hadv

temp_vadv

temp_hdiff

Could you tell me if it is possible to find more information on this anywhere?

Thanks a lot,

Evgeny

### Re: What is the output of DIAGNOSTICS_TS/UV?

They are simply the terms in the equations. I believe John Wilkin said the time rate of change terms (u_accel, temp_rate) should equal the sum of all the other terms.logvinov wrote:I have a question about the dia.nc file. What kind of terms does it contain?

Are those terms have simply form of the terms in N-S equations or something more complicated?

Use the source, Luke.Could you tell me if it is possible to find more information on this anywhere?

I would suggest looking at these terms for a simple problem for which you think you know what's going on first. I've looked at them for the UPWELLING case.

### Re: What is the output of DIAGNOSTICS_TS/UV?

Way back when I submitted the code to output the diagnostic terms, I included a page or two of documentation. Not very wordy, but it does list the different diagnostic variables, etc.

It can be found by clicking Documentation on the ROMS homepage and choosing Diagnostics.

It can be found by clicking Documentation on the ROMS homepage and choosing Diagnostics.

### Re: What is the output of DIAGNOSTICS_TS/UV?

I could not find this link. When I click on "Documentation" on what I guess is "the ROMS homepage" (I'm not sure anymore what the ROMS homepage is), I get transported to WikiROMS Documentation Portal. I don't see any listing for "Diagnostics" on this page. If I search WikiROMS for "Diagnostics", I find only the CPPDEFS (e.g. "DIAGNOSTICS_TS") but no description of the diagnostics of the type Heather referred to.crowley wrote: It can be found by clicking Documentation on the ROMS homepage and choosing Diagnostics.

Could someone provide a URL to the DIAGNOSTICS info, or repost the information?

Thanks,

Rich

### Tracer rates in diagnostics file

Hi all,

I'm trying to understand what's in the *rate diagnostic output. Take for example nitrate rate: it isn't equal to the sum of advection and diffusion. After going through the code I think it should be the total change with time (ie, include also biological sources minus sinks, fluxes due to nudging to climatology, etc), because step3d_t is one of the last calls in main3d.

However, if I try to reconstruct nitrate from its rate (ie, NO3(t)=NO3(0)+

Your comments will be greatly appreciated!

Best,

Laura

I'm trying to understand what's in the *rate diagnostic output. Take for example nitrate rate: it isn't equal to the sum of advection and diffusion. After going through the code I think it should be the total change with time (ie, include also biological sources minus sinks, fluxes due to nudging to climatology, etc), because step3d_t is one of the last calls in main3d.

However, if I try to reconstruct nitrate from its rate (ie, NO3(t)=NO3(0)+

*integral_from_0_to_t*NO3rate*dt*), it fails to reproduce NO3 in the region of strong nudging towards climatology... I don't understand why this happens, because in step3d_t Trate (where T stands for any tracer) is calculated after the nudging step, so it should take into account changes due to nudging, right?Your comments will be greatly appreciated!

Best,

Laura