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DTSTAMP:20230831T095746Z
LOCATION:Davos
DTSTART;TZID=Europe/Stockholm:20230627T101800
DTEND;TZID=Europe/Stockholm:20230627T101900
UID:submissions.pasc-conference.org_PASC23_sess110_pos135@linklings.com
SUMMARY:P46 - Parallel Second Order Conservative Remapping on the Sphere
DESCRIPTION:Poster\n\nSlavko Brdar, Willem Deconinck, Pedro Maciel, and Mi
 chail Diamantakis (ECMWF)\n\nWe present an MPI-parallel implementation and
  analysis of a conservative second-order interpolation method between arbi
 trary very high resolution spherical meshes supported by the Atlas library
  of ECMWF. Hence, meshes are those used by ECMWF’s IFS model: structured g
 rids such as the reduced Gaussian grids of IFS, quasi-structured grids suc
 h as ORCA of NEMO, or fully unstructured grids of FESOM2. This work is lar
 gely based on Kritsikis et al (2017) and is here extended to allow stagger
 ed data. Additionally, we have used a different approach for typical ingre
 dients of remapping process: that of spherical polygon intersections and t
 hat of fast search of potential intersectors. For these two we rely on ava
 ilable tools in the numerical library for weather simulations – Atlas. A c
 onventional conservative remapping assumes remapping values within cell ce
 ntres of a source mesh to cell centres of a target mesh. We have extended 
 the usage of our conservative remapping, by constructing sub-polygons, and
  allow remapping data either from cell-centres or from cell-vertices of a 
 source mesh to either cell-centres or cell-vertices of target mesh.\n\nSes
 sion Chair: Jibonananda Sanyal (National Renewable Energy Laboratory)
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