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Sergio deRada John Kindle (Ret) Igor Shulman Stephanie Anderson Ocean Sciences Meeting Orlando, FL March 5, 2008.

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Presentation on theme: "Sergio deRada John Kindle (Ret) Igor Shulman Stephanie Anderson Ocean Sciences Meeting Orlando, FL March 5, 2008."— Presentation transcript:

1 Sergio deRada John Kindle (Ret) Igor Shulman Stephanie Anderson Ocean Sciences Meeting Orlando, FL March 5, 2008

2 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 GridMODELS Motivation: Global->Coastal

3 HYCOMGLB 60.5 NCOMCCS 41.2 (HYCOMGLB) NCOMMB 65.0 (HYCOMGLB)EXPERIMENTS NCOMMB 65.3 (NCOMCCS) NCOMGLB glb8_2f NCOMCCS 40.1 (NCOMGLB) NCOMMB 65.2 (HYCOMGLB) NCOMMB 30.5 (NCOMCCS)

4 HYCOMGLB 60.5 NCOMCCS 41.2 (HYCOMGLB) NCOMMB 66.0 (HYCOMGLB)EXPERIMENTS NCOMMB 65.3 (NCOMCCS) NCOMGLB glb8_2f NCOMCCS 40.1 (NCOMGLB) NCOMMB 30.5 (HYCOMGLB) NCOMMB 65.2 (NCOMCCS) GLOBAL: HYCOM: Simulation restarts from climatological spin up NCOM: Simulation started from a previous experiment (10 years) 3-hourly 0.5-degree NOGAPS Forcing, Bulk HF Formulation HYCOM: NCODA Assimilation NCOM: MODAS (3D Temperature and Salinity relaxation)

5 HYCOMGLB 60.5 NCOMCCS 41.2 (HYCOMGLB) NCOMMB 66.0 (HYCOMGLB)EXPERIMENTS NCOMMB 65.3 (NCOMCCS) NCOMGLB glb8_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)

6 HYCOMGLB 60.5 NCOMCCS 41.2 (HYCOMGLB) NCOMMB 65.0 (HYCOMGLB)EXPERIMENTS NCOMMB 65.3 (NCOMCCS) NCOMGLB glb8_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

7 HYCOMGLB 60.5 NCOMCCS 41.2 (HYCOMGLB) NCOMMB 65.0 (HYCOMGLB)EXPERIMENTS NCOMMB 65.3 (NCOMCCS) NCOMGLB glb8_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)

8 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 IMPLEMENTATION

9 How does atmospheric forcing compare at mooring locations? Consistent with the model response? M1 ( -122.02, 36.74 ) M2 (-122.4, 36.67 ) QUALITATIVE EVALUATIONS

10 Winds and SST (observed vs. models) Aircraft Winds and SST 10m winds at M1 and M2 moorings Upwelling Relaxation Winds and SST (Observed)

11 Winds and SST (Coastal Models) RELAXATION (August 14) Aircraft GHYCOM->CCS GHYCOM GNCOM GNCOM->CCS UPWELLING (August 10) Aircraft GHYCOM->CCS GHYCOM GNCOM GNCOM->CCS

12 Winds and SST (Coastal Models) UPWELLING (August 10) Pathfinder GHYCOM->CCS GHYCOM GNCOM GNCOM->CCS SST Correlation.88.85.90.76

13 QUANTITATIVE EVALUATION Phase 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 domains Influence of local forcing @ San Diego Global Boundary Global->Regional assessment

14 GLBNCOM

15 GLBNCOM->CCSNCOM REGIONAL GLOBAL

16 GLBHYCOM

17 GLBHYCOM->CCSNCOM REGIONAL GLOBAL

18 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 STATIONS

19 GLBNCOM (top) | GLBHYCOM (bot)

20

21 NCOM BC (top) | HYCOM BC (bot) CCS with GLOBAL NCOM BC CCS with GLOBAL HYCOM BC

22 NCOM BC (top) | HYCOM BC (bot) CCS with GLOBAL HYCOM BC CCS with GLOBAL NCOM BC

23 NCOM IC/BC (top) | HYCOM IC/BC (bot) MBNCOM NEST? CCS with GLOBAL HYCOM BC CCS with GLOBAL NCOM BC

24 NCOM MONTEREY BAY NEST

25 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 WORK

26 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 / PLANS Global Model back to Jan 2003 (Currently Nov, 2003) -AOSN 2003 and ASAP 2006 periods PAPER

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