How to create wind forcing in ROMS?

General scientific issues regarding ROMS

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youngstor
Posts: 29
Joined: Mon Mar 01, 2010 2:11 pm
Location: Georgia

How to create wind forcing in ROMS?

#1 Unread post by youngstor »

Hi,

The wiki ROMS has a very nice documentation on how to create tidal forcing in ROMS (https://www.myroms.org/wiki/index.php/Tidal_Forcing).

I wonder if there is a similar documentation for creating atmospheric forcing (wind forcing, etc) in ROMS?

Any suggestions?
Any comments are truly appreciated.

Thanks,
Mike Y.

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kate
Posts: 4091
Joined: Wed Jul 02, 2003 5:29 pm
Location: CFOS/UAF, USA

Re: How to create wind forcing in ROMS?

#2 Unread post by kate »

Tides are simpler than winds in some respects. What sort of winds do you need? For a specific hindcast period or a forecast? What spatial and temporal resolution? The current default for our group is winds from the global MERRA hindcasts for which a colleague has written Python scripts to download and convert to a ROMS-ready format. We then let ROMS do the horizontal interpolations to the ROMS grid.

youngstor
Posts: 29
Joined: Mon Mar 01, 2010 2:11 pm
Location: Georgia

Re: How to create wind forcing in ROMS?

#3 Unread post by youngstor »

Hi Kate,

I am looking for wind forcing for a particular historical period of time (say, daily wind in Jan., 2010) for somewhere on the US west coast. The spatial resolution is approx. a few kilometers.

Do you mind providing some guidance on how your group creates wind forcing?

Many thanks,
kate wrote:Tides are simpler than winds in some respects. What sort of winds do you need? For a specific hindcast period or a forecast? What spatial and temporal resolution? The current default for our group is winds from the global MERRA hindcasts for which a colleague has written Python scripts to download and convert to a ROMS-ready format. We then let ROMS do the horizontal interpolations to the ROMS grid.

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kate
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Location: CFOS/UAF, USA

Re: How to create wind forcing in ROMS?

#4 Unread post by kate »

The MERRA winds are likely not fine enough in space for your needs. You will have to find some product out there that is suitable. Perhaps another reader has a suggestion and a toolbox for dealing with it. Alternately, you can explore the COAWST option and run your own WRF grid on top of the ocean.

Temporally, daily is a bit coarse. MERRA is three-hourly which means we don't have to invent a day-night cycle from the shortwave radiation file, plus it does a better job of tracking storms as they come through the domain.

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