How the roms interpolate the forcing/boundary time?

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rcxy
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Joined: Fri Jul 02, 2010 1:28 pm
Location: Guangdong Ocean University

How the roms interpolate the forcing/boundary time?

#1 Post by rcxy » Sat Dec 29, 2012 5:32 am

I konw the every focing/boundary file have a time, such as days and hours.And ROMS will lineally interpolate to the model time. The get_cycle will convert the time into day units.I want to konw how the roms to do?
For example:(DT=30,NDTFAST=60)
In the river discharge, if the river_time is days, the transport is 2000 meter3 second-1, how much is the transport of every step in the roms?
In the wind focing, if the sms_time is days, the sustr is 0.01 Newton meter-2, how much is the sustr of every step in the roms?
In the boundary, if the bry_time is hours, the zeta is 0.01 m, how much is the zeta of every step in the roms?

Thanks a lot!

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kate
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Re: How the roms interpolate the forcing/boundary time?

#2 Post by kate » Fri Jan 04, 2013 5:49 pm

ROMS will do a linear interpolation in time between the record before and the record after the current time. If you have just the one record, it should use that without interpolation.

tony1230
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Re: How the roms interpolate the forcing/boundary time?

#3 Post by tony1230 » Sat Oct 19, 2013 6:42 am

If i have only the monthly discharge in hand, can the river_time unit in month?

- steve

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kate
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Re: How the roms interpolate the forcing/boundary time?

#4 Post by kate » Sun Oct 20, 2013 9:15 pm

The routine that reads in the times is get_cycle. It checks the "units" attribute, but assumes "day" unless it finds "second". You could hack it to check for "month", but it currently doesn't do so.

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