2020-09-17 All-Hands Presentation Meeting Notes

Owned by Luke Van Roekel
Last updated: Sept 09, 2021 by Renata McCoy

Presenter: Andrew Bradley

Title:

High-order, property-preserving semi-Lagrangian tracer transport and physics-dynamics-grid remap in EAMv2

Abstract:

This talk describes two new methods that together increase the computational efficiency of the E3SM Atmosphere Model (EAM) by a factor of approximately two. EAM consists of the High-Order Methods Modeling Environment (HOMME) Spectral Element (SE) dynamical core (dycore) and the EAM physics and chemistry parameterizations. The most expensive parts of EAM are tracer transport in the dycore and parameterizations. Two related methods speed up each of these: high-order, property-preserving, remap-form, semi-Lagrangian tracer transport (SL transport) and high-order, property-preserving physics-dynamics-grid remap (Physgrid remap). SL transport replaces the dycore's Eulerian flux-form method, enabling much greater simulation time per communication round. Physgrid remap enables running parameterizations on a grid that approximately matches the effective resolution of the SE dycore. This procedure replaces running parameterizations on the denser dynamics grid. These new methods work seamlessly both in the standard EAM configuration and in the Regionally Refined Mesh (RRM) configuration.

Date

 

Time

  • PT: 8:30 am
  • ET: 11:30 am

Call Info

  • web session:   https://global.gotomeeting.com/join/570361173                   
  • call number:    (571) 317-3122 Access Code: 570-361-173,            If busy, use alternate number: (773) 945-1029

    Joining from a video-conferencing room or system?       Dial: 67.217.95.2##570361173 ,  Cisco devices: 570361173@67.217.95.2 

Attendees


Presentation

Time
Title
Presenter
Presentation
Recording
Notes

30 min


High-order, property-preserving semi-Lagrangian tracer transport and physics-dynamics-grid remap in EAMv2Andrew Bradleyamb-e3sm-091720.pdf

MP4 Movie (on the E3SM YouTube Channel)