Anomalous time series behavior

[Alfredo Terrazas]

Hi, hycom experts!

I'm running a high spatial resolution long-term run nested in another long-term run in the Gulf of Mexico. 

While checking the results of the nested run, I found an anomalous time series behavior: at certain depths, the current speed rose to not typical values for those depths, and after a while the current speed lowered to typical values, but these "events" occurred a few time during the whole run:

I already checked the nesting files and they do not behave like that. This problem does not happen in shallow waters, I'm only showing time series from one point (far from the domain boundaries),  however, I'm aware the problem presents in many others.  Also, I checked that this problem does not happen in all depths of this point I'm showing, for example, this is the time series (year 2013 only) at 700 m depth:

and everything seems normal, however, at 950m depth the problem starts to be noticed:

and at greater depths the problem is pretty evident:

I have never had a problem like this. Do you know what it could be? I attached blkdat.input

Thanks for your help

[David xie]

Hi Alfredo,

Does it relate to the setting? Like

   8.00   'dp0k  ' = layer   A deep    z-level spacing minimum thickness (m)

   8.00   'dp0k  ' = layer   B deep    z-level spacing minimum thickness (m)

   8.00   'dp0k  ' = layer   C deep    z-level spacing minimum thickness (m)

   8.00   'dp0k  ' = layer   D deep    z-level spacing minimum thickness (m)

   8.00   'dp0k  ' = layer   E deep    z-level spacing minimum thickness (m)

   8.00   'dp0k  ' = layer   F deep    z-level spacing minimum thickness (m)

   8.00   'dp0k  ' = layer   G deep    z-level spacing minimum thickness (m)

   8.00   'dp0k  ' = layer   H deep    z-level spacing minimum thickness (m)

   8.00   'dp0k  ' = layer   I deep    z-level spacing minimum thickness (m)

Cheers,

Jiping Xie

Jiping Xie                                                 =
Researcher                                              =
Ocean Modelling                                      =
Nansen Environmental and Remote        =
Sensing Center                                        =
Jahnebakken 3                                        =
5007, Bergen, Norway                          =
 (+47) 98482944 jipin...@nersc.no       =
Web: https://www.nersc.no/staff/jiping-xie =

On 22 Jul 2024, at 02:01, Alfredo Terrazas <alfi...@gmail.com> wrote:

Hi, hycom experts!

I'm running a high spatial resolution long-term run nested in another long-term run in the Gulf of Mexico. 

While checking the results of the nested run, I found an anomalous time series behavior: at certain depths, the current speed rose to not typical values for those depths, and after a while the current speed lowered to typical values, but these "events" occurred a few time during the whole run:

<Speed_Hindcast_total[1].png>

I already checked the nesting files and they do not behave like that. This problem does not happen in shallow waters, I'm only showing time series from one point (far from the domain boundaries),  however, I'm aware the problem presents in many others.  Also, I checked that this problem does not happen in all depths of this point I'm showing, for example, this is the time series (year 2013 only) at 700 m depth:

<Speed_Hindcast_2013_new_interp_0700m[1].png>

and everything seems normal, however, at 950m depth the problem starts to be noticed:

<Speed_Hindcast_2013_new_interp_0950m[1].png>

and at greater depths the problem is pretty evident:

<Speed_Hindcast_2013_new_interp_1200m[1].png>

I have never had a problem like this. Do you know what it could be? I attached blkdat.input

Thanks for your help

--
--
You received this message because you are a member of HYCOM.org
To ask a question, send an email to fo...@hycom.org

To unsubscribe from this group and stop receiving emails from it, send an email to forum+un...@hycom.org.
<Speed_Hindcast_2013_new_interp_0700m[1].png><Speed_Hindcast_2013_new_interp_0950m[1].png><blkdat.input><Speed_Hindcast_total[1].png><Speed_Hindcast_2013_new_interp_1200m[1].png>