[Ncep.list.emc.monsoondesk] Bug which caused CFSv2 giving different results when layout or/and no procs for ocean model was changed.

Mon Feb 17 00:26:17 UTC 2014

Dear Moorthi - Although I think I have missed some of the email exchanges on this thread, I also agree with Dr. Sahai. It would not be too hard to set up a web site or other simple method to keep our respective groups informed of issues and/or corrections with the CFSv2 code. While I understand that any CFSv2 errors found cannot be changed in NCEP operations due to the expense of repeating the re-forecasts, there are active efforts underway in NCEP, COLA and IITM to further diagnose and improve the model, so keeping each other informed is a natural way to accelerate progress and avoid duplication of effort. If there is interest in this at NCEP and IITM, COLA would be happy to set something up (web page, Dropbox folder, Google docs site, etc.). Best regards. — Jim

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Jim Kinter, Director
Center for Ocean-Land-Atmosphere Studies
Professor, Climate Dynamics
Dept. of Atmospheric, Oceanic & Earth Sciences
284 Research Hall, Mail Stop 6C5
George Mason University
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On 16Feb2014, at 11:58 AM, Shrinivas Moorthi - NOAA Federal <shrinivas.moorthi at noaa.gov> wrote:

> Dear Dr. Sahai,
>    You are absolutely right.
> Regards,
> Moorthi
> 
> 
> On Sun, Feb 16, 2014 at 10:15 AM, Dr. A.K.Sahai <sahai at tropmet.res.in> wrote:
> Dear Dr. Moorthi,
> 
> The issue is not that Larry(COLA) has identified the bug first or Prajeesh(IITM) has identified first and also is not that it was informed to IITM or not. Even it has been informed to IITM then there are different groups working on CFS and it is not possible to inform all in bits and pieces. Also how many bugs are still there? All these should be documented properly. The lack of a proper documentation is the main hurdle in implementation and development on CFS. Therefore NCEP/COLA/IITM has to work collaboratively for the proper documentation and if required IITM should send some young scientists to COLA/NCEP for this very important work.
> 
> Regards
> Sahai
> 
> ------------------------------------------
> Dr. Atul Kumar Sahai
> Scientist-F
> Chief Project Scientist,Extended Range Prediction
> Chief Project Scientist, High Performance Computing
> Indian Institute of Tropical Meteorology
> Ministry of Earth Sciences
> Dr. Homi Bhabha Road, Pashan, Pune
> 411 008, INDIA
> Phone:+91 20 25904520
> Fax : +91 20 25865142
> Mobile:+91 9423582314
> 
> ----- Original Message -----
> From: "Shrinivas Moorthi - NOAA Federal" <shrinivas.moorthi at noaa.gov>
> To: "Suryachandra Rao" <surya at tropmet.res.in>
> Cc: kinter at cola.iges.edu, marx at cola.iges.edu, "gibies george" <gibiesgeorge at gmail.com>, "Roxy Mathew" <roxy at tropmet.res.in>, "Swapna P" <swapna at tropmet.res.in>, "Dr. K Ashok" <ashok at tropmet.res.in>, "SujithKrishna" <sujith at tropmet.res.in>, "Sabeerali C. T." <sabeer at tropmet.res.in>, "monsoon desk" <monsoon.desk at tropmet.res.in>, "Xingren Wu - NOAA Affiliate" <Xingren.Wu at noaa.gov>, "Prajeesh A.G CAT" <prajeesh.cat at tropmet.res.in>
> Sent: Sunday, February 16, 2014 7:10:38 AM
> Subject: Re: Bug which caused CFSv2 giving different results when layout or/and no procs for ocean model was changed.
> 
> 
> 
> 
> Surya,
> We do have a fixed version of this code and I could send the routines that are fixed if you wish.
> Moorthi
> 
> 
> 
> 
> On Sun, Feb 16, 2014 at 1:09 AM, Suryachandra Rao < surya at tropmet.res.in > wrote:
> 
> 
> Dear JIm,
> 
> Please have a look at the following discussion. You have mentioned once that you have informed Prof. Goswami about some bug that is impacting AMOC in CFS V2.
> Can you please share the bug fix with this group. Are you part of the monsoon desk emailing list? If not, we can add your group to the list.
> 
> Regards
> Surya
> 
> 
> 
> 
> 
> Dr. Suryachandra A. Rao
> Chief Scientist
> Program on Development of Seasonal Prediction System
> Indian Institute of Tropical Meteorology
> Pashan, Pune -411 008, India
> Phone: +91-2025904245
> 
> ----- Original Message -----
> From: "Shrinivas Moorthi - NOAA Federal" < shrinivas.moorthi at noaa.gov >
> To: "Prajeesh A.G CAT" < prajeesh.cat at tropmet.res.in >
> Cc: gibiesgeorge at gmail.com , "Roxy Mathew" < roxy at tropmet.res.in >, "Swapna P" < swapna at tropmet.res.in >, "Dr. K Ashok" < ashok at tropmet.res.in >, "SujithKrishna" < sujith at tropmet.res.in >, "Sabeerali C. T." < sabeer at tropmet.res.in >, "monsoon desk" < monsoon.desk at tropmet.res.in >, "Xingren Wu - NOAA Affiliate" < Xingren.Wu at noaa.gov >
> Sent: Sunday, February 16, 2014 5:55:26 AM
> Subject: Re: Bug which caused CFSv2 giving different results when layout or/and no procs for ocean model was changed.
> 
> 
> 
> This was a bug that was first identified by Larry Marx of COLA. I was under the impression that COLA had informed IITM about this. We have not corrected this bug in the operations since the bug was also in the hindcasts.
> Moorthi
> 
> 
> 
> 
> On Sat, Feb 15, 2014 at 12:47 AM, Prajeesh A.G CAT < prajeesh.cat at tropmet.res.in > wrote:
> 
> 
> 
> 
> yeah, That is a better solution. anyway needs to be tested.
> 
> Regards..
> 
> Prajeesh A G
> Scientist 'B'
> CCCR, IITM
> Pune, India
> 
> 
> 
> 
> 
> --
> Dr. Shrinivas Moorthi
> Research Meteorologist
> Global Climate and Weather Modeling Branch
> Environmental Modeling Center / National Centers for Environmental Prediction
> 5830 University Research Court - (W/NP23), College Park MD 20740 USA
> Tel: (301)683-3718
> 
> e-mail: Shrinivas.Moorthi at noaa.gov
> Phone: (301) 683-3718 Fax: (301) 683-3718
> 
> 
> 
> --
> Dr. Shrinivas Moorthi
> Research Meteorologist
> Global Climate and Weather Modeling Branch
> Environmental Modeling Center / National Centers for Environmental Prediction
> 5830 University Research Court - (W/NP23), College Park MD 20740 USA
> Tel: (301)683-3718
> 
> e-mail: Shrinivas.Moorthi at noaa.gov
> Phone: (301) 683-3718 Fax: (301) 683-3718
> 
> 
> 
> -- 
> Dr. Shrinivas Moorthi
> Research Meteorologist
> Global Climate and Weather Modeling Branch
> Environmental Modeling Center / National Centers for Environmental Prediction
> 5830 University Research Court - (W/NP23), College Park MD 20740 USA
> Tel: (301)683-3718
> 
> e-mail: Shrinivas.Moorthi at noaa.gov
> Phone:  (301) 683-3718   Fax: (301) 683-3718

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