Changes between Initial Version and Version 6 of Ticket #1646
- Timestamp:
- 2017-09-28T23:09:06+02:00 (7 years ago)
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Ticket #1646
- Property Owner changed from NEMO team to jamesharle
- Property Keywords DOM SCO added; domzgr zgr sco removed
- Property Status changed from new to assigned
- Property Cc jamesharle added
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Ticket #1646 – Description
initial v6 1 1 Having had a look at the NOCL set up of a high resolution AMM60 configuraton I've come across a possible pit fall concerning the choice of parameters in the Furner-Siddorn vertical coordinates. See the attached figures of the top grid box depth (e3t) using the Siddorn-Furner sigma coords for hc=150 and hc=50 (50 being the default shipped with NEMO for the AMM12 domain). Spot the discontinuity! 2 3 {{{#!div style='text-align: center' 4 [[Image(fs_hc_150.png)]][[Image(fs_hc_50.png)]] 5 }}} 2 6 3 7 From reading the code - it looks like the fixed surface grid box depth (rn_zs=1m in AMM60) and stretched coordinates come into play at depths > hc. Anything less than the hc depth and we're in pure sigma - so as AMM60 has only 50 wet vertical levels - top grid box (e3t) is going to just under 3m at depths approaching 150m (i.e. hc=150). And that's why hc = 50 looks as it should!
