= '''CMCC-NEMO team - 2013 actions''' =
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Last edited [[Timestamp]]

'''WARNING page currently in progress'''

'''members'''

|| Name || Institution || % || Position ||
|| Marcello Vichi || CMCC, Bologna || 20 || CMCC NEMO officer ad interim ||
|| Tomas Lovato || CMCC, Bologna || 20 || post-doc ||
|| Esteban Gutierrez || CMCC, Bologna || 20 || junior scientific programmer ||
|| Dorotea Iovino || CMCC, Bologna || 20 || junior scientist ||
|| Pier Giuseppe Fogli || CMCC, Bologna || 20 || senior scientific programmer ||
|| Italo Epicoco || CMCC, Lecce || 20 || scientist ||
|| Silvia Mocavero || CMCC, Lecce || 20 || scientist ||

'''total weeks : '''

> = 40 weeks (=1 man-year)

'''Summary:'''

''The major developments completed during 2013 consisted in CMCC-1a and CMCC-6. CMCC-1a was added as a sub-activity of CMCC-1 that continues in 2014. The two developments have been tested and ready to be merged. CMCC-6 is however not completely finalized as it relies on the merging of the new BDY code in the trunk. This will be completed in 2014''

|| Action || Brief description || Status || Branch name || Trac ticket n° || Wiki page name || Reviewer(s) || Review status || Nb of weeks || Ready for merge/ If "NO", reason and status for 2014 ||
|| CMCC-1a || Scalability || Continuation || https://forge.ipsl.jussieu.fr/nemo/browser/branches/2013/dev_r3948_CMCC_NorthFold_Opt || https://forge.ipsl.jussieu.fr/nemo/ticket/1150 || || A. Coward || DONE || || YES ||
|| CMCC-1b || Scalability: MPI-OPENMP || Continuation || [[BR]]https://forge.ipsl.jussieu.fr/nemo/browser/branches/2013/dev_r4017_CMCC_MPI_OpenMP || [[BR]]https://forge.ipsl.jussieu.fr/nemo/ticket/1151 || || || || || NO[[BR]]The hybrid OpenMP/MPI approach has been implemented for the Gyre configuration and scalability studies are on going. The development will be continued in 2014[[BR]][[BR]]'''See further notes at CMCC.1 below''' ||
|| CMCC-2 || Masks || Started || || || || || || || See notes in the status line below ||
|| CMCC-3 || Data assimilation || Not Started || || || || || || || See notes in the status line below ||
|| CMCC-4 || Divergence damping || Continuation || || || || || || || See notes in the status line below ||
|| CMCC-5 || Vertical stability || Not started || || || || || || || See notes in the status line below ||
|| CMCC-6 || BC for TOP || Continuation || [https://forge.ipsl.jussieu.fr/nemo/browser/branches/2013/dev_r3996_CMCC6_topbc?rev=] || [https://forge.ipsl.jussieu.fr/nemo/ticket/1143] || || Ethe || DONE || || YES ||
|| CMCC-7 || AGRIF || Not Funded || || || || || || || See notes in the status line below ||

=== '''CMCC.1''' Scalability Optimization ===
'''          Motivation:''' Improve NEMO scalability. [[BR]]  '''          Status:'''  Partly closed. The feasibility study related to the introduction of the  PETSc library  has been concluded. From this study it has been deduced  that a  consistent manpower is needed. Since this effort is not  available using  the currently funded projects, the activity related to  the introduction  of PETSc into the NEMO code will be sustained when new  project funds  will be achieved. A report on the results of this study  is  available and will be provided at the November merge party. [[BR]]XIOS has been validated on the CMCC Sandy Bridge systems (ATHENA). [[BR]]  '''          Main tasks:'''[[BR]]   * Introduction of a new software layer in the NEMO stack software  exploiting numerical optimized and parallel libraries such as  pBLAS,  ScaLAPACK and PETSc. [[BR]]  * Continuation of the implementation of  hybrid parallel approach based on the functional parallelism for the  tracers, momentum equations and 3D domain decomposition.[[BR]]  * Test performances of XIOS on CMCC architectures[[BR]]* Optimization of the north fold management[[BR]] '''System Reviewer:'''  A. Coward[[BR]]  '''          Deadline:'''  2013[[BR]]  '''          Priority: '''Medium [[BR]]  '''          Principal investigator:''' Italo Epicoco [[BR]]

=== '''CMCC.2 '''         Modification of masks ===
'''          Motivation:''' Expand the modification of masks to the EEN scheme [[BR]]  '''          Status:''' The modification of masks has been implemented for the energy and for  the enstrophy conserving schemes. The implementation for the energy and  enstrophy (Arakawa) conserving scheme has not been tested and therefore  still cannot be implemented officially. The PI left CMCC and the development is suspended.[[BR]]  '''          Main tasks:''' Evaluate the impact of fmask on the EEN scheme and       eventually make       modifications. [[BR]]  '''Science Reviewer:'''  Gurvan Madec[[BR]]  '''          Deadline:'''  2013[[BR]]  '''          Priority:''' High[[BR]]  '''          Principal investigator:'''   Srdjan Dobricic [[BR]]

=== '''CMCC.3 '''        Direct interface with data assimilation ===
'''          Motivation:'''   Interface with data assimilation systems [[BR]]  '''          Status:''' The direct interface with the data assimilation requires a simple method  for the deallocation of the memory once it is not necessary. This should  be done in order to reduce the size of the executable. In NEMO this is  possible only for he working arrays, but when coupled with a data  assimilation scheme the deallocation of the memory of many arrays that  are not necessary for restarting Nemo becomes very complicated. The  solution for this problem would completely change the form of the Nemo  code and currently is not feasible. [[BR]]  '''          Main tasks:'''  Develop software interface that will avoid the         writing to the  disk,         provide the possibility to use a different domain  decomposition         in Nemo and the         data assimilation, reduce  the memory usage of Nemo when it is         inactive. [[BR]]  '''Science Reviewer:'''  !MetOffice[[BR]]  '''          Deadline:''' 2013 [[BR]]  '''          Priority: '''Medium [[BR]]  '''          Principal investigator:'''    Srdjan Dobricic [[BR]]

=== '''CMCC.4 '''Divergence damping filter operator ===
'''          Motivation:'''    Additional diffusion on only the divergent component         of the          velocity could reduce the numerical noise at the high model          topography (step         topography, deep convection, etc.). [[BR]]  '''          Status:''' The divergence damping operator is implemented in the ASM package. It  has also been implemented and tested in the dynamics package in Version  3.4, but the documentation is still missing. Therefore, it was not  implemented. The PI left CMCC and the development is suspended.[[BR]]  '''          Main tasks:''' Add a routine that will apply the divergence filter         in addition to         the horizontal diffusion of the velocity.[[BR]]  '''          System Reviewer:''' [[BR]]'''Science Reviewer:''' '''[[BR]]Deadline: '''2013[[BR]]  '''          Priority:''' High [[BR]]  '''          Principal investigator:'''   Srdjan Dobricic[[BR]]

=== '''CMCC.5 '''Vertical         stability of increment fields ===
'''          Motivation:'''   Modify the increment field in order to reduce the         vertical         instabilities. [[BR]]  '''          Status:'''The vertical stability of the increments is implemented in Version 3.3  and has not been updated in the newest version. Also the documentation  is still missing.[[BR]]  '''          Main tasks:''' Modify the ASM code  to add the diagnostics of the         vertical         stability and the  modificatyions to the increment fields. The PI left CMCC and the  development is suspended.[[BR]]  '''          System Reviewer:''' [[BR]]  '''          Science Reviewer:'''  Met Office [[BR]]'''Deadline: ''' 2013[[BR]]  '''          Priority:''' Medium[[BR]]  '''          Principal investigator: '''Srdjan Dobricic

=== '''CMCC.6 '''Surface and lateral boundary conditions for tracers ===
'''          Motivation:'''    Add generic interfaces for surface and lateral boundary  conditions  for BGC tracers (river input, atmospheric deposition, open  boundary  conditions). [[BR]]  '''          Status:''' started in 2012, first implementation waiting for the final choice of BDY[[BR]]  '''          Main tasks:''' Port the interface used for transport routines to the  surface and boundary condition routines currently used for T and S. [[BR]]  '''          System Reviewer:'''  C. Ethe'[[BR]]  '''          Science Reviewer:'''  C. Ethe', ??  [[BR]] '''Deadline:'''  2013[[BR]]  '''          Priority:''' High [[BR]]'''          Principal investigator: '''Marcello Vichi

=== '''CMCC.7 '''Testing of AGRIF: scalability and usage with biogeochemical variables ===
'''          Motivation:'''    evaluate AGRIF performances in realistic domains and utilization with the BFM[[BR]]  '''          Status:''' this activity has not been funded and will not be undertaken for this year[[BR]]  '''          Main tasks:'''  check performances of AGRIF with an Atlantic refinement; assess the  compatibility with BFM variables and the related computational overhead[[BR]]  '''          System Reviewer:''' [[BR]]  '''          Science Reviewer:'''    Dorotea Iovino[[BR]] '''Deadline:'''  2013-2014[[BR]]  '''          Priority:''' Medium [[BR]]'''          Principal investigator: ''' Marcello Vichi and Italo Epicoco