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BEGIN:VEVENT
DTSTAMP:20210916T132450Z
LOCATION:Jean Calvin
DTSTART;TZID=Europe/Stockholm:20210707T113000
DTEND;TZID=Europe/Stockholm:20210707T120000
UID:submissions.pasc-conference.org_PASC21_sess140_msa270@linklings.com
SUMMARY:Benchmarking Coupling Software Regridding Functionality: One of th
 e Challenges of Code Coupling in Climate Modelling
DESCRIPTION:Minisymposium\n\nBenchmarking Coupling Software Regridding Fun
 ctionality: One of the Challenges of Code Coupling in Climate Modelling\n\
 nValcke, Piacentini, Jonville\n\nChallenges facing coupling software of th
 e climate modelling community will be presented, building on discussions o
 f the 5th Workshop on Coupling Technologies for Earth System Models that t
 ook place virtually in September 2020. In particular, the benchmarking wor
 k around the analysis of the quality and the performance of different inte
 rpolation/regridding libraries used in the climate modelling community i.e
 . the SCRIP library, ATLAS, MOAB-TempestRemap, YAC, ESMF and XIOS will be 
 presented. The motivation of this work is to complement the SCRIP library 
 algorithms implemented in the OASIS3-MCT coupler, which will be briefly in
 troduced.5 algorithms are evaluated for 4 functions for 14 couples of grid
 s used in real ocean or atmosphere models. Metrics proposed by the CANGA p
 roject quantifying the sensitivity, conservation, consistency, monotonicit
 y and performances of the library are calculated.The quality analysis show
 s that some of the regridding libraries, although presenting nice design f
 eatures for the forthcoming heterogeneous architectures, are not mature en
 ough to be considered as regridding options in OASIS3-MCT. For example, so
 me librairies do not offer conservative regridding or lack the support of 
 masked fields. Others present specific difficulties with the treatment of 
 the North folding typical of some ocean grids. After interactions with the
  library developers, some bug fixes and some trick on how to best use the 
 library, 3 of them finally show very good results for the regridding algor
 ithm, functions and grids evaluated.  Other criteria, like performance, lo
 ng-term governance or available user support will come into play in the fi
 nal choice.\n\nDomain: CS and Math, Emerging Applications, Climate and Wea
 ther
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