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RepeatYearForcingStrategiesforACCESS-OM2
AndyHogg,KialStewart,NicHannah,AndrewKiss,AidanHeerdegen&the
COSIMAteam
ACCESS-OM2Pre-releaseACCESS-OM2pre-releaseandtesFngisunderway:– Thedefault1°versionbasedheavilyonACCESS-CM2;– The0.25°versiondevelopedbyARCCSS;– Anew0.1°configura4on,fundedbyCOSIMALinkageProject(ANU,UNSW,BoM,CSIRO,AAD,UTas).
ConfiguraFonsarenowin3rdpre-releasestage,see:
hYps://github.com/OceansAus/access-om2
What’sintheBox?• BasedonMOM5,CICE5,OASIS-MCTandMATM.• JRA55forcingsupported.• Newmethodofse`ngupregriddinginterpolaFonusingESMF.This
isnecessarybecausetheregriddingmethodusedbyOASISwon'tscaleto0.1°.
• Significantperformanceimprovements,especiallytodowithcoupling.Weexpectthefinalmodeltorunonlyafew%slowerthanstandaloneMOM5.
• Runoffregriddingisdone,basedonofflineregriddingworkusingthekdtreedatastructurebyRussFiedler(CSIRO).
• Ironedoutmanycouplingbugs,someofwhichmayhaveexistedforsomeFme.
• Willincludenew0.1°bathymetry(RussFiedler)
IniFaltesFngModel Resolu4on NCPUs Years/Day Notes
ACCESS-OM2 1° 252 40
ACCESS-OM2-025 0.25° 1455 21
ACCESS-OM2-01 0.1° 5600 ~3 Nottestedyet
IniFaltesFng
ForcingStrategies(thankstoKialStewart)• MATMisa“file-based”atmosphere• WeuseJRA55-do(1955-2016)• “RepeatYearForcing”opFonforspinup• Pickayearwhichminimisesvariability• UseMay1990toApril1991