ROMS/TOMS Tangent ROMS/TOMS Tangent Linear and Adjoint Linear and Adjoint Models Models Andrew Moore, CU Andrew Moore, CU Hernan Arango, Rutgers U Hernan Arango, Rutgers U Arthur Miller, Bruce Cornuelle, Arthur Miller, Bruce Cornuelle, Emanuele Di Lorenzo, Doug Neilson Emanuele Di Lorenzo, Doug Neilson UCSD UCSD
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ROMS/TOMS Tangent Linear and Adjoint Models Andrew Moore, CU Hernan Arango, Rutgers U Arthur Miller, Bruce Cornuelle, Emanuele Di Lorenzo, Doug Neilson.
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ROMS/TOMS Tangent ROMS/TOMS Tangent Linear and Adjoint ModelsLinear and Adjoint Models
Andrew Moore, CUAndrew Moore, CUHernan Arango, Rutgers UHernan Arango, Rutgers U
Arthur Miller, Bruce Cornuelle, Arthur Miller, Bruce Cornuelle, Emanuele Di Lorenzo, Doug Neilson Emanuele Di Lorenzo, Doug Neilson
UCSDUCSD
Major ObjectiveMajor Objective
• In addition to IOM, provide the ocean In addition to IOM, provide the ocean modelling community with analysis modelling community with analysis and prediction tools available in and prediction tools available in meteorology and NWP, using a meteorology and NWP, using a community OGCM (ROMS).community OGCM (ROMS).
OverviewOverview
• NL ROMS: NL ROMS: 0 0S t S
• Perturbation: Perturbation: 0S S s
OverviewOverview
• NL ROMS:NL ROMS: 0 0S t S
• TL ROMS:TL ROMS: 0
|Ss t S s As
• AD ROMS:AD ROMS: † †Ts t A s
( ) (0, ) (0)s t R t s
† †(0) ( ,0) ( )Ts R t s t
(TL1)
(AD)
OverviewOverview
• Second TLM: Second TLM:
0 0( ) ( )S t S A S S (TL2)
• TL1= Representer ModelTL1= Representer Model
• TL2= Tangent Linear Model TL2= Tangent Linear Model
Current Status of TL and ADCurrent Status of TL and AD
• All advection schemesAll advection schemes
• Most mixing and diffusion schemesMost mixing and diffusion schemes
• Greens function assimilationGreens function assimilation
• IOM interface (IROMS) (NL, TL1, TL2, IOM interface (IROMS) (NL, TL1, TL2, AD)AD)
PublicationsPublications
• Moore, A.M., H.G Arango, E. Di Lorenzo, B.D. Moore, A.M., H.G Arango, E. Di Lorenzo, B.D. Cornuelle, A.J. Miller and D. Neilson, 2003:Cornuelle, A.J. Miller and D. Neilson, 2003: A A comprehensive ocean prediction and analysis comprehensive ocean prediction and analysis system based on the tangent linear and adjoint of system based on the tangent linear and adjoint of a regional ocean modela regional ocean model. . Ocean Modelling,Ocean Modelling, Final Final revisions.revisions.
• H.G Arango, Moore, A.M., E. Di Lorenzo, B.D. H.G Arango, Moore, A.M., E. Di Lorenzo, B.D. Cornuelle, A.J. Miller and D. Neilson, 2003:Cornuelle, A.J. Miller and D. Neilson, 2003: The The ROMS tangent linear and adjoint models: A ROMS tangent linear and adjoint models: A comprehensive ocean prediction and analysis comprehensive ocean prediction and analysis system. system. Rutgers Tech. Report, Rutgers Tech. Report, In preparation.In preparation.
What next?What next?
• Complete 4DVar driverComplete 4DVar driver
• Interface barotropic ROMS to IOMInterface barotropic ROMS to IOM
• Complete 3D Picard iteration test Complete 3D Picard iteration test (TL2)(TL2)
• Interface 3D ROMS to IOMInterface 3D ROMS to IOM
SCB ExamplesSCB Examples
Confluence and diffluenceConfluence and diffluence