Getm on a extended ocean area

[mahmood akhyani]

dear all
I need some info about the effect of changing following parameters in getm.inp
bdyramp_2d
ip_ramp
spinup

I am using GETM to studying the circulation in the North Indian Ocean and the Gulf of Oman.
forcing with 10m wind and tide time series on open boundary by clamp condition.
measurements shows some gyres in this area but some of them does not show in model result and some other damp rapidly.
I think that changing the mentioned value could improve the results. how do these parameters related to my domain?

as my studied area is 12*26 degree I used: Longitude=60, Latitude=19 and f-plan=true in getm.inp

thank you

Mahmood

[Ulf Gräwe]

On Sun, 2012-02-19 at 14:50 +0000, mahmood akhyani wrote:
> dear all
> I need some info about the effect of changing following parameters in
> getm.inp
> bdyramp_2d
> ip_ramp
> spinup

These parameters should not have an effect on your production
simulations, since they are only important for the spinup phase.

>
> I am using GETM to studying the circulation in the North Indian Ocean
> and the Gulf of Oman.
> forcing with 10m wind and tide time series on open boundary by clamp
> condition.
> measurements shows some gyres in this area but some of them does not
> show in model result and some other damp rapidly.

Are these gyres barotropic driven or are they baroclinic?

> I think that changing the mentioned value could improve the results.
> how do these parameters related to my domain?
> as my studied area is 12*26 degree I used: Longitude=60, Latitude=19
> and f-plan=true in getm.inp

Why do you set f_plane=true. You cover a rather large domain and
therefore the variations in f might be important.

I had a look into your getm.inp.
Why do you set runtype=4 (full baroclinic simulations) but switch of the
calculation of T/S:
calc_temp = .false.,
calc_salt = .false., ?

Do you really know, what you are doing?

--
Ulf Gräwe

Leibniz Institute for Baltic Sea Research Warnemuende
Dept. for Physical Oceanography and Instrumentation
Seestrasse 15
D-18119 Rostock-Warnemuende
Germany

Tel. : +49 (381) 5197-358
Fax : +49 (381) 5197-440

[mahmood]

dear Ulf
thank you.

> Are these gyres barotropic driven or are they baroclinic?

these are baroclinic driven, in my last run that I attached its
getm.inp the are disappeared.

> Why do you set f_plane=true. You cover a rather large domain and
> therefore the variations in f might be important.

I had misunderstood of the effect of this parameter. Ill change it to
false.

> Why do you set runtype=4 (full baroclinic simulations) but switch of the
> calculation of T/S:
>    calc_temp = .false.,
>    calc_salt = .false., ?

these changes were made in my last test to find if it possible that
these files prepared uncorrectly or not.
also I have one question on this part, I have not enough salinity and
temperature profile on my domain to make 3d file for them, how can I
prepare them for using in my model?
regards
Mahmood

[Ulf Gräwe]

>
> these changes were made in my last test to find if it possible that
> these files prepared uncorrectly or not.
> also I have one question on this part, I have not enough salinity and
> temperature profile on my domain to make 3d file for them, how can I
> prepare them for using in my model?
> regards
> Mahmood

If you need temperature and salinity fields from global running models,
have a look at:
http://hycom.org/dataserver/glb-analysis
This is the global HYCOM model running from 2003-- with a spatial
resolution of 1/12 degree.

If you need longer periods, have a look here:
http://dss.ucar.edu/datasets/ds093.1/
This is the gloabl NCEP model running from 1979--.

--
Ulf Gr�we

Leibniz Institute for Baltic Sea Research Warnemuende
Dept. for Physical Oceanography and Instrumentation
Seestrasse 15
D-18119 Rostock-Warnemuende
Germany

Pho. : +49 (381) 5197-358
Fax : +49 (381) 5197-440
Web : http://www.io-warnemuende.de/ulf-graewe-en.html
Room : 216