RRTMGP: A High-Performance Broadband Radiation Code for the Next Decade

Abstract

The radiation calculations needed for climate simulations require many independent and complicated calculations, and are therefore an inviting target for new computing architectures such as Many- Integrated-Cores (MICs) and Graphical Processing Units (GPUs). We are developing RRTMGP ( P stands for parallel ), a modern version of the radiation code (RRTMG) used by many climate models, directed at the current generation of vector- and cache-based computational architectures. This code will retain the high accuracy of RRTMG, but is being developed from scratch to make it more flexible and amenable to optimization across a wide range of platforms. The objective is a single wellmaintained, well-documented, and efficient radiation code that can be used by the modeling community for a diverse range of applications across a wide range of computing facilities. RRTMGP will exhibit profound improvements in speed for GPU and vector CPU machines and lesser, but still valuable, speed-ups on other CPU-based platforms relative to the current version of the code.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2014
Accession Number
ADA616545

Entities

People

  • Eli J Mlawer

Organizations

  • Atmospheric and Environmental Research, Inc

Tags

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Broadband
  • Chebyshev Polynomials
  • Climate Change
  • Coefficients
  • Computer Architecture
  • Computer Programming
  • Computing System Architectures
  • Errors
  • Floating Point Operations
  • Frequency
  • Optical Properties
  • Optics
  • Polynomials
  • Radiation
  • Radiative Transfer

Fields of Study

  • Physics

Readers

  • Computer Programming and Software Development.
  • Economics
  • Parallel and Distributed Computing.