Post on 23-Jan-2016
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Progress Report of the Gulf of Maine Integrated Model System
The UMASSD Team: C. Chen, G. Cowles, D. Stuebe, S. Hu, Q. Xu and P. Xue
The WHOI Team:
R. C. Beardsley, C. Davis, R. Ji and D. Limeburner
The MIT Team:
P. Rizzolli and J. Wei
Website: http://fvcom.smast.umassd.edu
Outlines
1) Upgrade the MM5 to WRF (Meteorological Forcing)
2) Upgrade the GoM FVCOM to the third generation
3) Data assimilation experiments for the GLOBEC hindcast years
4) Introduction of the Northeast Ocean Forecast System (NeCOFS)
MASS CoastalFVCOM
Surface Wave Model
Generalized Ecosystem Model (FVCOM Module)
Sediment Transport Model(FVCOM Module)
Local Weather Model (WRF)/MM5
North American Meso-scale (NAM) Weather Model
Satellite SSTBuoy WindsInsolation
Satellite SST, U,V
Buoy T,S,U,V
Freshwater Input
Global Tidal Model
Under developed
Existing Models
FVCOM System
KEY
Heat Flux Wind Stress P-E U,V
PA
R
Data
BC’s
BC’s
U,V Waves, Langmuir Cells
Form Drag
assimilation
assimilation
Multi-Stage Zooplankton Model (IBM and concentration-based)
Nutrients, PhytoplanktonOcean Colors
Fish Larval Model(IBM and concentration-based)
VPR
Larval data
GoM/GB FVCOM
BC’s Inflow
Groundwater Input
The Gulf of Maine Integrated Model System
MM5 WRF
B-grid
First-order leapfrog time integration
Finite-difference with no guarantee of conservation
Advection-second-order centered difference scheme
Time split modes for acoustic and gravity waves
C-grid
Third-order Runge-Kutta split-explicit time integration
Finite-volume with guarantee of conservation
Advection-fifth-order upwind scheme or sixth-order centered difference scheme.
Time split modes for acoustic and gravity waves
Regional Domain: 9 km Large domain: 27 km
Domain 1
Domain 2
Domain 2
Domain 3
Domain 3
Local domain: 3 km
Hindcast
Comparison of MM5 and WRF with observations
Comparison of MM5 and WRF with observations at all buoys
u u v v t t
Model
u(m/s) v(m/s) t(°C)
MM5 2.7 3.4 2.9 3.9 1.4 1.8
WRF 2.4 3.0 2.8 3.5 1.4 1.8
Forecast Errors for May 2-10, 2007 on 11 buoys
Second Generation
• Horizontal resolution: 0.3-1.0 km in the coastal region;
• Generalized terrain-following coordinates: 46 layers: 10 uniform layers in the surface and bottom boundary layers, respectively.
• 1500 m cutoff off Georges Bank• Capable to nest to the coasta-estuarine model
with a horizontal resolution of ~10 -500 m;
Third Generation
• Horizontal resolution: 0.5-1.0 km in the coastal region;
• Sigma-coordinates: 31 vertical layers• 300 m cutoff off Georges Bank
Second Generation Third Generation
Surface sigma level: don’t resolve the near-surface current because the horizontal velocity is calculated at the mid-point of the first sigma layer, which changes with depth.
At the 2-m below the surface: Resolve the near-surface current better with the thin uniform layers at the surface..
2 m at GoMOOS Buoy E 50 m at GoMOOS Buoy E
Observed Second-generation FVCOM Third-generation FVCOM
3rd FVCOM shows a certain level improvement than 2nd FVCOM for some relatively large wind events.
Data Assimilation Experiments
1) Optimal Interpolation (OI) assimilated all T/S data into the model as monthly arrays
2) Ensemble Kalman Filter to assimilate all T/S data into the model as adaptive samplings
Examples were made for the 1998 hindcast reanalysis experiment
Note: The ensemble Kalman filter experiment results were made by the graduate student Xue and he is in hospital, so the results are not included in this talk.
Jan Feb Mar Apr
May June July Aug
Spt Oct Nov Dec
The hydrographic data sites: January-December, 1998
With no OI Assimilation With OI Assimilation
Near-surface, April 1998
Velocity (OI)-Velocity (No-OI); Temperature (OI)-Temperature (No-OI)
No OI With OI
Near-surface, August 1988
Velocity (OI)-Velocity (No-OI); Temperature (OI)-Temperature (No-OI)
At 150-m, August 1998
NO-OI With-OI
Note: Temperature contour needs to check (interpolation method?)
NeCOFS Model Flow Diagram: 1.0
Stage: 1 (midnight)Crontab starts NeCOFS
wrf forecast data
wrf hindcast data
fvcom data (results)
river data
sst data
Day# -10 -5 -4 -3 -2 -1 0 1 2 3
Day 0 ~ now
Current Process1:2:3:
(Previous Hindcast)
(Previous Forecast)
NeCOFS Model Flow Diagram: 1.0
Stage: 2 (midnight)Upate River Data
wrf forecast data
wrf hindcast data
fvcom data (results)
river data
sst data (Previous Forecast)
Day# -10 -5 -4 -3 -2 -1 0 1 2 3
Current Process1: Download USGS data and update data file2:3:
(Previous Hindcast)
NeCOFS Model Flow Diagram: 1.0
Stage: 3 (00:10)Upate SST Data
wrf forecast data
wrf hindcast data
fvcom data (results)
river data
sst data
Day# -10 -5 -4 -3 -2 -1 0 1 2 3
Current Process1: Download JPL SST and update OI assim2:3:
S 2
(Previous Forecast)
(Previous Hindcast)
Latest available SST data is already several days old
NeCOFS Model Flow Diagram: 1.0
Stage: 4 (00:15)Run WRF
wrf forecast data
wrf hindcast data
fvcom data (results)
river data
sst data
Day# -10 -5 -4 -3 -2 -1 0 1 2 3
Current Process1: WRF Forecast2: WRF Hindcast3:
S 2
S 3
Continuous WRF data archive is automatically updated with new results
(Previous Hindcast)
(Previous Forecast)
NeCOFS Model Flow Diagram: 1.0
Stage: 5 (08:00)Start FVCOM hindcast
wrf forecast data
wrf hindcast data
fvcom data (results)
river data
sst data
Day# -10 -5 -4 -3 -2 -1 0 1 2 3
Current Process1: WRF Forecast2: FVCOM Hindcast3:
S 2
S 3
FVCOM overwrites old results updating time period of new WRF data.
S 4
(Still running)
(Previous Hindcast)
(Previous Forecast)
NeCOFS Model Flow Diagram: 1.0
Stage: 6 (11:00)Start FVCOM Forecast
wrf forecast data
wrf hindcast data
fvcom data (results)
river data
sst data
Day# -10 -5 -4 -3 -2 -1 0 1 2 3
Current Process1: FVCOM Forecast2:3:
S 2
S 3
S 4
S 5
S 5
(Previous Hindcast)
(Previous Forecast)
FVCOM forecast runs till end of available WRF data
NeCOFS Model Flow Diagram: 1.0
Stage: 7 (12:00)NeCOFS Forecast Finished!
wrf forecast data
wrf hindcast data
fvcom data (results)
river data
sst data
Day# -10 -5 -4 -3 -2 -1 0 1 2 3
Current Process1:2:3:
S 2
S 3
S 4
S 5
S 5 S 6
New Results are Automatically posted to the web site!
(Previous Hindcast)
(Previous Forecast)
QuickTime™ and aH.264 decompressor
are needed to see this picture.
Publications (only physical compoment)
1. Chen, C. R. C. Beardsley, Q. Xu, G. Cowles and R. Lime burner, 2007. Tidal dynamics in the Gulf of Maine and New England Shelf: An application of FVCOM. Journal of Geophysical Research, in revision
2. Chen, C., H. Huang, R. C. Beardsley, H. Liu, Q. Xu, and G. Cowles, 2007. A finite-volume numerical approach for coastal ocean circulation studies: comparisons with finite-difference models. Journal of Geophysical Research, 112, C03018, doi:10.1029/2006JC003485.
3. Chen, C., Q. Xu, R. Houghton and R. C. Beardsley, 2007. A Model-Dye Comparison Experiment in the Tidal Mixing Front Zone on the Southern Flank of Georges Bank. Journal of Geophysical Research, in press.
4. Chen, C., R. C. Beardsley, Q. Xu and R. Limeburner, Tidal Dynamics in the Gulf of Maine and New England Shelf: An Application of FVCOM. Deep Sea Research II: GLOBEC/GB Special Issue. In revision.
5. Chen, C., P.Malanotte-Rizzoli, J. Wei, R. C. Beardsely, Z. Lai, P. Xue, S. Lyu, Q. Xu, J. Qi and G. Cowles, Validation of Kalman filters for coastal ocean problems: an experiment with FVCOM. Journal of Geophysical Research, submitted.
6. Cowles, G., Chen, C., Lentz, S.L., Beardsley, R.C., and Xu, Q., 2007. Validation of Model-Computed Low Frequency Currents on the New England Shelf. Journal of Geophysical Research, accepted with revision.
7. Huang, H. C. Chen, G. Cowles, C. D. Winant, R. C. Beardsley, K. S. Hedstrom, and D. B. Haidvogel, 2007. FVCOM validation experiments: comparisons with ROMS for three idealized test problems. Journal of Geophysical Research, submitted.
8. Lai, Z, C. Chen, G. Cowles and R. C. Beardsley, A non-hydrostatic version of FVCOM-validation experiment I: surface standing and solitary waves. In preparation.
9. Lai, Z., C. Chen, G. Cowles and R. C. Beardsley, A non-hydrostatic version of FVCOM-valiation experiment II: lock exchange flow and internal solitary waves. In preparation.
On-going Activities
1. Complete the data assimilation experiments with OI and K-Filters.
2. Coupled UG-SWAN into FVCOM to include the dynamics of the current and wave interaction.
3. Improve the model dynamics with more accurate and complete river discharges.
4. Apply the non-hydrostatic version of FVCOM (NH-FVCOM) to resolve the internal waves on the slope and wintertime convection.