[MITgcm-support] ptracer and sponge (Daniel Goldberg)

whale 250107302 at qq.com
Thu May 17 06:05:28 EDT 2018


Dear Daniel
  
 I think you are right. The OBCS does not contain PTracer forcing. You need to employ RBCS to restore the PTracer.

 Cheers
  
 Chengyan
  

 

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  From:  "mitgcm-support-request"<mitgcm-support-request at mitgcm.org>;
 Date:  Thu, May 17, 2018 04:07 PM
 To:  "mitgcm-support"<mitgcm-support at mitgcm.org>;
 
 Subject:  MITgcm-support Digest, Vol 179, Issue 11

 

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Today's Topics:

   1. Output 2D slice from 3D simulation (Ruan Xiaozhou)
   2. segmentation fault (Andreas Klocker)
   3. ptracer and sponge (Daniel Goldberg)


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Message: 1
Date: Thu, 17 May 2018 03:35:13 +0000
From: Ruan Xiaozhou <saberruan at hotmail.com>
To: "mitgcm-support at mitgcm.org" <mitgcm-support at mitgcm.org>
Subject: [MITgcm-support] Output 2D slice from 3D simulation
Message-ID:
<DM5PR12MB19295B811982B2861D2917E7A0910 at DM5PR12MB1929.namprd12.prod.outlook.com>

Content-Type: text/plain; charset="utf-8"

Dear MITgcm users,

Hope this message finds you well. I have been trying to output 2D slice (YZ) data from a 3D simulation (because the 3D field is too large to be outputted at high frequency) but did not find proper locations in the diagnostics package. I?d really appreciate it if you could point me to the right directions.

Best,
Xiaozhou
--
Xiaozhou Ruan
Division of Geological and Planetary Sciences
California Institute of Technology
MC 131-24
Pasadena, CA  91125

phone: +1 626-395-8715
email: xiaozhour at caltech.edu<mailto:xiaozhour at caltech.edu>
web:   http://www.its.caltech.edu/~xruan
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Message: 2
Date: Thu, 17 May 2018 16:27:33 +1000
From: Andreas Klocker <andreas.klocker at utas.edu.au>
To: "mitgcm-support at mitgcm.org" <mitgcm-support at mitgcm.org>
Subject: [MITgcm-support] segmentation fault
Message-ID: <d299752c-4dd1-1994-9894-2ccdf87e196b at utas.edu.au>
Content-Type: text/plain; charset=UTF-8; format=flowed

Hi guys,

I've taken a working 1/24 degree nested simulation (of Drake Passage)
with 42 vertical layers and tried to increase the vertical layers to 150
(without changing anything else apart from obviously my boundary files
for OBCS and recompiling with 150 vertical layers). Suddenly I get the
following error message:

forrtl: severe (174): SIGSEGV, segmentation fault occurred
Image              PC                Routine Line        Source
libirc.so          00002BA1704BC2C9  Unknown Unknown  Unknown
libirc.so          00002BA1704BAB9E  Unknown Unknown  Unknown
libifcore.so.5     00002BA1722B5F3F  Unknown Unknown  Unknown
libifcore.so.5     00002BA17221DD7F  Unknown Unknown  Unknown
libifcore.so.5     00002BA17222EF43  Unknown Unknown  Unknown
libpthread.so.0    00002BA1733B27E0  Unknown Unknown  Unknown
mitgcmuv_drake24_  00000000004E61BC  mom_calc_visc_ 3345  mom_calc_visc.f
mitgcmuv_drake24_  0000000000415127  mom_vecinv_ 3453  mom_vecinv.f
mitgcmuv_drake24_  0000000000601C33  dynamics_ 3426  dynamics.f
mitgcmuv_drake24_  0000000000613C2B  forward_step_ 2229  forward_step.f
mitgcmuv_drake24_  000000000064581E  main_do_loop_ 1886  main_do_loop.f
mitgcmuv_drake24_  000000000065E500  the_main_loop_ 1904  the_main_loop.f
mitgcmuv_drake24_  000000000065E6AE  the_model_main_ 2394  the_model_main.f
mitgcmuv_drake24_  00000000005C6439  MAIN__ 3870  main.f
mitgcmuv_drake24_  0000000000406776  Unknown Unknown  Unknown
libc.so.6          00002BA1737E2D1D  Unknown Unknown  Unknown
mitgcmuv_drake24_  0000000000406669  Unknown Unknown  Unknown

First this error pointed to a line in mom_calc_visc.f on which
calculations regarding the Leith viscosity are done. As a test I then
used a Smagorinsky viscosity instead and now it crashes with the same
error, but pointing to a line where Smagorinsky calculations are done. I
assume I must be chasing a way more fundamental problem than one related
to these two viscosity choices...but I'm not sure what this might be....

Has anyone got any idea of what could be going wrong here?

Thanks in advance!

Andreas



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Message: 3
Date: Thu, 17 May 2018 09:07:26 +0100
From: Daniel Goldberg <dngoldberg at gmail.com>
To: MITgcm-support at mitgcm.org
Subject: [MITgcm-support] ptracer and sponge
Message-ID:
<CAEhdavJ9PbX8SC-cM8RYJJEVODu6b71qNQLdDknDzZnRMeHTQg at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hello all

>From what i can tell, the obcs sponge facility is not implemented for
PTRACERS? I just want to make sure this is correct before i set up RBCS for
a passive tracer.

Many thanks
Dan

-- 

Daniel Goldberg, PhD
Lecturer in Glaciology
School of Geosciences, University of Edinburgh
Geography Building, Drummond Street, Edinburgh EH8 9XP


em: D <dgoldber at mit.edu>dan.goldberg at ed.ac.uk
web: https://www.geos.ed.ac.uk/homes/dgoldber
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