Re: [swanmodel-users] How to restart swan run

[k k <kar...@gm...>]

Hi
I believe you are after hot starting the model.

HOTFILE 'restart_abc.xy'

Parallel runs might need concatenation.
 The swan file saves the 2d spectral state, which should be fairly
compatible for next run, unless the wind structure changed significantly.
The following provides the context.
https://www.myroms.org/forum/viewtopic.php?t=4637

--
Nga Mihi
Namaste

KarunaKar Kintada.,


On Thu, 25 Dec 2025, 07:46 Zeinab Salah, <zei...@gm...> wrote:

> Hi,
> Thank you for your reply.
> Please, can you explain clearly how to restart (or make a hot start) for
> SWAN after stopping in the middle of a run? If I run SWAN for a period of
> one year, It will be very difficult to start again from scratch after
> running one or two months.
>
> Best wishes,
> Zeinab
>
>
> ‫في الثلاثاء، 23 ديسمبر 2025 في 2:01 م تمت كتابة ما يلي بواسطة ‪Ali Qorban
> Sarvi‬‏ <‪ali...@al...‬‏>:‬
>
>> hi,
>>
>> simply you could redesign your model from the last time in which the model stopped.but sometimes when the model stops it has a fundamental issue
>> that needs to be addressed ; so previous answers would be wrong, and you need to rebuild the model from scratch again.
>> ------------------------------
>> *From:* Zeinab Salah <zei...@gm...>
>> *Sent:* Monday, December 22, 2025 2:03 PM
>> *To:* swa...@li...; amany Hamdy
>> *Subject:* [swanmodel-users] How to restart swan run
>>
>> Dear All,
>> I want to ask if the SWAN program stops mid-run, how can I start from the
>> last time it stopped?
>> I attached the input file which used to run swan from 20210713.000000
>> to 20210713.230000 every 10 minutes, my questions:
>> 1- how to create a restart file every timestep to be used in case the
>> model stops.
>> 2- Can we run swan for a long time (ex. 10 years )?  In this case if we
>> run it year by year, will we need a restart file?
>> 3- should we modify our input file?
>>
>> Thank you in advance.
>> Best regards,
>> Zeinab
>>
>>
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