dale haidvogel institute of marine and coastal sciences coupled basin- to regional-scale ocean...

Dale HaidvogelInstitute of Marine and Coastal Sciences

Coupled Basin- to Regional-Scale

Ocean Modeling as Developed in the

U.S. GLOBEC Program

Dale Haidvogel

IMCS, Rutgers University

[email protected]


The principal objective of U.S. GLOBEC research is to understand and predict the effects of global climate change on ocean ecosystem dynamics


Approach: Spatially nested biophysical Approach: Spatially nested biophysical modelsmodels

NCEP/MM5 -> ROMS/NPZ -> IBMNCEP/MM5 -> ROMS/NPZ -> IBM


Capabilities developed

1. One- and two-way nesting• NCAR CCSM

• HyCOM

• SODA

2. 4D Variational data assimilation

3. Food web (NPZD) models

4. Individual-based models (zoop, salmon)


Northeast Pacific Program: Spatial windows†

† CCS box contains multiple applications-dependent inner domains


“Reduced” CCS (underway)

• Inner CCS domain (mesoscale survey)

• 2-Km resolution

• 2002

• COAMPS 9 Km forcing

• SODA boundary conditions

• Will include ecosystem model (NPZD+Fe,

NEMURO+Fe)

• Forward runs / data assimilation


Questions and Issues

• How good is the forward model?

• Does it improve upon the reanalysis fields?

• What processes / model details control the errors?

• Use of 4DVar to correct errors

• Redo above for the ecosystems


SODA


Low vertical resolution


Increased resolution of surface layer


Recap

• Significant hindcast skill over several months

• Influence of boundary data, resolution, …

• Errors related to mesoscale evolution of flow?

• Assimilation next (physics first)


Questions?

dale haidvogel institute of marine and coastal sciences coupled basin- to regional-scale ocean...

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