Has anyone used ROMS for a pan-Arctic simulation? If so, how was the North Pole handled?
Thank you, Tasha
pan-Arctic simulations
Re: pan-Arctic simulations
I used SCRUM to model the Arctic once... Paul Budgell has a domain covering the Arctic and parts of the North Atlantic. ROMS as a regional model runs on a logically rectangular grid. Imagine plopping a piece of paper down on a globe - it doesn't matter where, there is no pole problem.
What can be a bit tricky is interpolating fields onto the ROMS grid. Say you have bathymetry from 0.5 to 359.5, or from -179.9 to 179.9. If you aren't careful, there will be funkiness at the seam.
What can be a bit tricky is interpolating fields onto the ROMS grid. Say you have bathymetry from 0.5 to 359.5, or from -179.9 to 179.9. If you aren't careful, there will be funkiness at the seam.
Re: pan-Arctic simulations
What coordinate system is the forcing in? Is it one that ROMS should know how to deal with? Is ROMS not dealing with it correctly? You can ask ROMS to output the heat flux and the wind forcing - they should be smooth across the pole if everything is working right. I recently hacked the interpolation in my ROMS to work for Enrique's circumpolar grid in the Southern Ocean, but I didn't test it. I'll see about attaching my kludge...
- Attachments
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periodic_patch.txt- Kludge for globally periodic domains when using lat/lon forcing.
- (3.4 KiB) Downloaded 249 times
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asz178467
Re: pan-Arctic simulations
Hello sir, Could you please elaborate regarding generating Arctic grid in Roms Model. As I'm new to this Modelling.kate wrote:I used SCRUM to model the Arctic once... Paul Budgell has a domain covering the Arctic and parts of the North Atlantic. ROMS as a regional model runs on a logically rectangular grid. Imagine plopping a piece of paper down on a globe - it doesn't matter where, there is no pole problem.
What can be a bit tricky is interpolating fields onto the ROMS grid. Say you have bathymetry from 0.5 to 359.5, or from -179.9 to 179.9. If you aren't careful, there will be funkiness at the seam.
Thanks in Advance
Re: pan-Arctic simulations
What do you want to know? I'm running a pan-Arctic domain now, which is described in the ROMS manual.
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asz178467
Re: pan-Arctic simulations
How to Create Grid for Arctic region?? How to define lat, lon by taking care of north pole in grid generation process??
Re: pan-Arctic simulations
You want to be working in a polar stereographic projection so that there is no pole problem. The domain is roughly a rectangle over the pole. The curvilinear orthogonal grids are made in a flat geometry, so you need software that can do map projections and inverse map projections to get back to the latitudes and longitudes.