Subgrid parameterisations for primitive equation atmospheric models

J S Frederiksen, M R Dix, S L Osbrough, V Kitsios

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

Abstract

Dynamical and thermodynamical subgrid-scale parameterisations of eddy drain, net dissipation and stochastic backscatter are calculated for a multi-level primitive equation atmospheric general circulation model. The parameterisations have only moderate variability with height and a cusp behaviour with peaks near the largest retained wavenumber. Vertically integrated net dissipation functions for vorticity and temperature are very similar to corresponding results for barotropic simulations while the divergence dissipation is nearly four times stronger. Atmospheric general circulation model simulations with the new subgrid model improve kinetic energy spectra and zonal flows compared with control simulations.
Original languageEnglish
Title of host publicationProceedings of the 17th Biennial Computational Techniques and Applications Conference
EditorsMarkus Hegland, Jason Sharples
Place of PublicationCanberra ACT Australia
PublisherCambridge University Press
PagesC83-C100
Number of pages18
Volume56
DOIs
Publication statusPublished - 2015
Externally publishedYes
EventComputational Techniques and Applications Conference 2014 - Australian National University, Canberra, Australia
Duration: 1 Dec 20143 Dec 2014
Conference number: 17th
http://maths.anu.edu.au/events/ctac-2014

Publication series

NameANZIAM Journal
PublisherCambridge University Press
Volume56
ISSN (Print)1446-1811
ISSN (Electronic)1446-8735

Conference

ConferenceComputational Techniques and Applications Conference 2014
Abbreviated titleCTAC 2014
CountryAustralia
CityCanberra
Period1/12/143/12/14
Internet address

Keywords

  • Subgrid modelling
  • climate models
  • large-eddy simulations

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