sergio derada john kindle (ret) igor shulman stephanie anderson
DESCRIPTION
Numerical Evaluation of Boundary Forcing from GODAE Global Products in the US West Coast. Sergio deRada John Kindle (Ret) Igor Shulman Stephanie Anderson. Ocean Sciences Meeting Orlando, FL March 5, 2008. MODELS. NCOM Coastal Model Monterey Bay (MB) 35.5-37.5N, 121.5-123.5W - PowerPoint PPT PresentationTRANSCRIPT
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Sergio deRadaSergio deRada
John Kindle John Kindle (Ret)(Ret)
Igor ShulmanIgor ShulmanStephanie Anderson Stephanie Anderson
Ocean Sciences Ocean Sciences MeetingMeeting
Orlando, FLOrlando, FLMarch 5, 2008March 5, 2008
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Global Models
1/12-degree GLOBAL HYCOM- Mercator Grid* (~7Km)- 4500x3298- 32 Layer ρ/σ/z- Expt 60.5 (O.M. Smedstad)
1/8-degree GLOBAL NCOM- Curvilinear (~12Km)- 2048x1280- 40 Level σ/z (19/21)- glb8_2f (operational)
NCOM Regional Model
California Current System (CCS)
30-50N, 116-134W
• 1/12-degree
• 163x229
• 40 Level σ/z (19/21)
• Lat/Lon grid (~9Km)
NCOM Coastal Model
Monterey Bay (MB)
35.5-37.5N, 121.5-123.5W
• ~1-4Km Resolution
• 81x58
• 29 σ levels
• Orthogonal Curvilinear Grid
MODELSMODELS
Motivation: Global->Coastal
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HYCOMGLB60.5
NCOMCCS 41.2(HYCOMGLB)
NCOMMB 65.0(HYCOMGLB)
EXPERIMENTSEXPERIMENTS
NCOMMB 65.3(NCOMCCS)
NCOMGLBglb8_2f
NCOMCCS 40.1(NCOMGLB)
NCOMMB 65.2(HYCOMGLB)
NCOMMB 30.5(NCOMCCS)
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HYCOMGLB60.5
NCOMCCS 41.2(HYCOMGLB)
NCOMMB 66.0(HYCOMGLB)
EXPERIMENTSEXPERIMENTS
NCOMMB 65.3(NCOMCCS)
NCOMGLBglb8_2f
NCOMCCS 40.1(NCOMGLB)
NCOMMB 30.5(HYCOMGLB)
NCOMMB 65.2(NCOMCCS)
GLOBAL:
• HYCOM: Simulation restarts from climatological spin upNCOM: Simulation started from a previous experiment (10 years)
• 3-hourly 0.5-degree NOGAPS Forcing, Bulk HF Formulation
• HYCOM: NCODA AssimilationNCOM: MODAS (3D Temperature and Salinity relaxation)
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HYCOMGLB60.5
NCOMCCS 41.2(HYCOMGLB)
NCOMMB 66.0(HYCOMGLB)
EXPERIMENTSEXPERIMENTS
NCOMMB 65.3(NCOMCCS)
NCOMGLBglb8_2f
NCOMCCS 40.1(NCOMGLB)
NCOMMB 30.5(HYCOMGLB)
NCOMMB 65.2(NCOMCCS)
NCOMCCS:
• EXPT 41.2: 20040101-20061231 IC/BC from global HYCOM, daily OB update
• EXPT 40.1: 19981001-present, IC/BC from global NCOM, daily OB update
- 3-hourly 9-Km COAMPS Forcing, Net HF- MODAS 3D Temperature and Salinity relaxation (same as NCOMGLB)- Mellor-Yamada 2.5 (same as NCOMGLB)- Flather scheme, vertical distribution/radiative (1-point)- Coupled to COSIN Ecosystem Model (not shown)
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HYCOMGLB60.5
NCOMCCS 41.2(HYCOMGLB)
NCOMMB 65.0(HYCOMGLB)
EXPERIMENTSEXPERIMENTS
NCOMMB 65.3(NCOMCCS)
NCOMGLBglb8_2f
NCOMCCS 40.1(NCOMGLB)
NCOMMB 65.2(HYCOMGLB)
NCOMMB 30.5(NCOMCCS)
• 20060727-20060902 (Adaptive Sampling And Prediction)
• daily OB update from global models
• hourly OB update from regional models
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HYCOMGLB60.5
NCOMCCS 41.2(HYCOMGLB)
NCOMMB 65.0(HYCOMGLB)
EXPERIMENTSEXPERIMENTS
NCOMMB 65.3(NCOMCCS)
NCOMGLBglb8_2f
NCOMCCS 40.1(NCOMGLB)
NCOMMB 65.2(HYCOMGLB)
NCOMMB 30.5(NCOMCCS)
- Hourly 3-Km COAMPS Forcing, Net HF- No data assimilation (contribution of Remote vs. Local Forcing)- Tidal Forcing from OSU- Flather and Orlansky BC scheme, MY2.5 Mixing- Coupled to COSIN Ecosystem Model (not shown)
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Outer NestHYCOM ρ/σ/z
HYCOM TOOLS
Inner NestNCOM σ/z
NCOM TOOLS
• Generalized Methodology for mapping vertical/horizontal grids
• One Way Coupling* On the HYCOM (source grid) side:
• HYCOM tools
-layer to z
…to generate and intermediate Z grid.
( Suggested to match NCOM Z-structure)
*NCODA coupling on Z-Grid
On the NCOM (target grid) side:
• - to final σ or σ/z grid- horizontally (optional)
Intermediate Z Grid
NESTING IMPLEMENTATIONNESTING IMPLEMENTATION
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How does atmospheric forcing compare at mooring locations?
Consistent with the model response?
•M1 (-122.02, 36.74)
•M2 (-122.4, 36.67)
QUALITATIVE EVALUATIONSQUALITATIVE EVALUATIONS
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Winds and SST (observed vs. models)
Aircraft Winds and SST 10m winds at M1 and M2 moorings
Upwelling
Relaxation
Winds and SST (Observed)Winds and SST (Observed)
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Winds and SST (Coastal Winds and SST (Coastal Models)Models)
RELAXATION (August 14)
Aircraft GHYCOM->CCS GHYCOM GNCOM GNCOM->CCS
UPWELLING (August 10)
Aircraft GHYCOM->CCS GHYCOM GNCOM GNCOM->CCS
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Winds and SST (Coastal Winds and SST (Coastal Models)Models)
UPWELLING (August 10)
Pathfinder GHYCOM->CCS GHYCOM GNCOM GNCOM->CCS
SST Correlation .88 .85 .90 .76
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QUANTITATIVE EVALUATIONQUANTITATIVE EVALUATIONPhase Plots• SSH (qualitative)
• Capture barotropic information
• Trace signals propagating in time along the coast
• Measuring the response of the nest to the remote forcing
@ Monterey
Within all domainsInfluence of local forcing
@ San Diego
Global BoundaryGlobal->Regional assessment
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GLBNCOMGLBNCOM
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GLBNCOM->CCSNCOMGLBNCOM->CCSNCOMREGIONAL
GLOBAL
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GLBHYCOMGLBHYCOM
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GLBHYCOM->CCSNCOMGLBHYCOM->CCSNCOMREGIONAL
GLOBAL
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Tide gauges used to evaluate model response
•Monterey (-121.88, 36.60)
-local forcing, inner nest
•San Diego (-117.25, 32.68)
-remote forcing influence
TIDE GAUGE STATIONSTIDE GAUGE STATIONS
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GLBNCOM (top) | GLBHYCOM GLBNCOM (top) | GLBHYCOM (bot)(bot)
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GLBNCOM (top) | GLBHYCOM GLBNCOM (top) | GLBHYCOM (bot)(bot)
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NCOM BC (top) | HYCOM BC NCOM BC (top) | HYCOM BC (bot)(bot)
CCS with GLOBAL NCOM BC
CCS with GLOBAL HYCOM BC
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NCOM BC (top) | HYCOM BC NCOM BC (top) | HYCOM BC (bot)(bot)
CCS with GLOBAL HYCOM BC
CCS with GLOBAL NCOM BC
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NCOM IC/BC (top) | HYCOM NCOM IC/BC (top) | HYCOM IC/BC (bot)IC/BC (bot)
MBNCOM NEST?MBNCOM NEST?
CCS with GLOBAL HYCOM BC
CCS with GLOBAL NCOM BC
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NCOM MONTEREY BAY NESTNCOM MONTEREY BAY NEST
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Implementation of 1/25-degree grid (~3.5Km)
HYCOMCCS and NCOMCCS (same geometry)
• Extend to 52N (Juan de Fuca and Georgia Straits)
• Exciting results with 4Km NCOM Model
CURRENT WORKCURRENT WORK
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• HYCOM and NCOM viable as IC/BC providers
• Regional Model Nesting adds value to coastal model
• Warm bias in HYCOM has subsided
- DA, NOGAPS 0.5 Forcing
• Better than expected results seen with HYCOM OBC
- Possibly due to higher horizontal resolution
CONCLUSIONS / PLANSCONCLUSIONS / PLANS
• Global Model back to Jan 2003 (Currently Nov, 2003)
- AOSN 2003 and ASAP 2006 periods
• PAPER