[MITgcm-support] KPP parameters not read?

Donald Slater daslater at ucsd.edu
Tue Oct 17 19:45:11 EDT 2017

Just to clarify, as in retrospect my previous email was a little confusing.

I do have "useKPP=.TRUE." in data.pkg. And I know KPP is running because I get the expected variable vertical viscosity when I print out the relevant diagnostic.

But I still have the issue with the simulation appearing to ignore the parameters in data.kpp


> On Oct 17, 2017, at 4:13 PM, Dimitris Menemenlis <dmenemenlis at gmail.com> wrote:
> Did you specify "useKPP=.TRUE." in data.pkg?
>> On Oct 17, 2017, at 4:06 PM, Donald Slater <daslater at ucsd.edu> wrote:
>> Hi,
>> I am running some simulations with the KPP package enabled, but I think I have a strange problem reading parameters from data.kpp. I noticed this because I changed some parameters (difm0, difs0 and dift0) without having any effect on my simulation.
>> The output stream from my simulation suggests that data.kpp is being read (i.e. I get the lines "KPP_INIT: opening data.kpp … OPEN_COPY_DATA_FILE: opening file data.kpp ... KPP_INIT: finished reading data.kpp”).
>> However if I try to trip the simulation up by inserting things which don’t make sense into data.kpp, for example setting "difm0 = Donald”, the simulation carries on as usual with the default value for difm0 and no error messages. In contrast, if I insert something silly into data.icefront (e.g. icefrontthetasurface = Donald), the simulation immediately stops. This suggests to me that somehow difm0 (and perhaps the other parameters in data.kpp) are not actually being read.
>> This reminds me a little of another message on the support list (http://mailman.mitgcm.org/pipermail/mitgcm-support/2005-July/003245.html). I’ve looked at kpp_readparms and compared it to similar files for other packages but can’t see anything amiss.
>> Has anyone experienced this or can offer any pointers as to what might be going on?
>> Many thanks,
>> Donald
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