1. The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
Coupling of high-resolution meteorological and wave models over the Gulf of Thailand
Presented by
Dr.Wattana Kanbua
Director, Marine Meteorological Center
Thai Meteorological Department
To be held on May, 2012 at EXPO2012 Yeosu Korea.

2. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
Outline
Introduction
WAM Model
WIND Models
Results
Conclusions
To be held on May, 2012 at EXPO2012 Yeosu Korea.

3. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
Introduction
Third Regional Workshop on Storm Surge and Wave Forecasting - A Hands on Forecast Training Laboratory, Beijing, China, July 2005.
Fourth Regional Workshop on Storm Surge and Wave Forecasting - A Hands on Forecast Training Laboratory, Manila, Philippines, September 2006.
Jamboree-II (Combined Modeling and Data Management Training Workshop), Held at IODE, Oostende, Belgium, 8-14 October 2006.
Jamboree-III (MetOcean Modelling Workshop), Held at IODE, Oostende, Belgium, October 2009.
Dr. Johannes GUDDAL
To be held on May, 2012 at EXPO2012 Yeosu Korea.

4. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
Introduction
Thailand has located in tropical zone and The change of weather in Thailand has been influenced by the monsoon.
The north-east monsoon winds has blown from the north-east it travels across the Gulf of Thailand, This usually means that along the eastern coastline of southern part of Thailand and offshore islands can receive significant rainfall and huge waves between November and January.
There was severely eroded by strong wind and huge waves. Hence, the destructive force from the wind and sea waves is diminished.
There was coincidence when a cyclone had occurred in the Indian Ocean. The wind system induced a northeast monsoon winds which was stronger than normal. It caused high waves hit hundreds of houses in southern provinces.
Waves estimated at nearly four-metre struck the southern provinces of Prachuap Khiri Khan, Chumpon and Surat Thani, prompting residents to evacuate. Some people panicked, as such an incident has not happened in half a century. An initial survey found three houses destroyed by giant waves. Other houses are under water during 25 – 28 December 2011.
To be held on May, 2012 at EXPO2012 Yeosu Korea.

5. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
Introduction
Cyclone-1 THANE had occurred during December It took place at 9.80 N Latitude and E Longitude on 25 December 2011 at 18UTC, the sustain winds was 35 knots, the status was tropical depression and there was developing and became Cyclone-1 at N latitude and E Longitude on 28 December 2011 at 06UTC, the sustain winds was 65 knots. It was moving westward go to India. It was weak at N Latitude and E Longitude on 30 December 2011 at 06UTC, the sustain winds was 40 knots, the status was tropical depression.
To be held on May, 2012 at EXPO2012 Yeosu Korea.

6. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
WAM Model
It is a third generation wave model that integrates the basic transport equation describing the evolution of a two-dimensional ocean wave spectrum without additional ad hoc assumptions regarding the spectral shape.
The three source functions describing
The wind input
Nonlinear transfer
White-capping dissipation
They are prescribed explicitly.
To be held on May, 2012 at EXPO2012 Yeosu Korea.

7. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
WAM Model
THE ENERGY BALANCE EQUATION
To be held on May, 2012 at EXPO2012 Yeosu Korea.

8. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
WAM Model
WAM PHYSICS
SOURCE TERMS S = Sin + Snl + Sds + Sbottom
WIND INPUT SOURCE TERM Sin
CYCLE 1-3 BASED ON SYNDER (1981)
CYCLE 4 BASED ON JANSSEN (1991)
NON-LINEAR SOURCE TERM Snl
BASED ON HASSELMANN’S THEORIES ON WAVE-WAVE INTERACTIONS
DISSAPATION SOURCE TERM Sds
BASED ON HASSELMANN’S THEORY OF DISSAPATION DUE TO WHITE CAPPING. TUNING TERM
BOTTOM FRICTION SOURCE TERM Sbottom
ONLY APPLIES IN SHALLOW WATER
To be held on May, 2012 at EXPO2012 Yeosu Korea.

9. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
WAM Model
WAM PHYSICS
WAVE PROPAGATION
WAVES ARE PROPAGATED AT THERE GROUP SPEED USING A 1st ORDER UPWINDING SCHEME.
CHARACTERIZED BY HIGH NUMERICAL DIFFUSION
WAVE REFRACTION AND SHOALING
To be held on May, 2012 at EXPO2012 Yeosu Korea.

10. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
WAM Model
WAM INPUTS
WIND INPUT
U10
U-STAR (FRICTION VELOCITY)
WIND STRESS
NOGAPS
1x1 degree
WRF
5x5km
TOPOGRAPHY
ETOPO5 (5MIN RESOLUTION)
0.083x0.083 degree
9.2x9.2km
To be held on May, 2012 at EXPO2012 Yeosu Korea.

11. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
WAM Model
WAM OUTPUT
OUTPUT
DIRECTIONAL FREQUENCY SPECTRA
SIGNIFICANT WAVE HEIGHT
PEAK WAVE DIRECTION
PEAK WAVE PERIOD
SEA AND SWELL HEIGHT
WAVE STRESS
To be held on May, 2012 at EXPO2012 Yeosu Korea.

12. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
WAM Model
MODEL SETUP 25 15 90
115 95
105 5
COARSE GRID
FINE GRID
To be held on May, 2012 at EXPO2012 Yeosu Korea.

13. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
WAM Model
COARSE GRID
To be held on May, 2012 at EXPO2012 Yeosu Korea.

14. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
WAM Model
FINE GRID
NOGAPS winds
WRF winds
1x1 degree
Note: 1 degree = 111 km
5x5 km.
To be held on May, 2012 at EXPO2012 Yeosu Korea.

15. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
WIND MODELS
NOGAPS IS GLOBAL MODEL.
THE RESOLUTION IS 1X1 DEGREE
DOWNLOAD FROM WEBSITE :
WRF IS MESOSCALE MODEL.
THE RESOLUTION IS 5X5 KM
RUN AT MARINE METEOROLOGICAL CENTER BY DOWNLOAD GLOBAL MODEL FROM NCEP AND DOWNSCALING INTO SMALL AREA AS THE GULF OF THAILAND.
To be held on May, 2012 at EXPO2012 Yeosu Korea.

16. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
NOGAPS DOMAIN
Run WAM for Coarse Grid frame
To be held on May, 2012 at EXPO2012 Yeosu Korea.

17. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
WRF DOMAIN
Run WAM for Fine Grid frame
To be held on May, 2012 at EXPO2012 Yeosu Korea.

18. WRF modeling flowchart
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
WRF modeling flowchart
การผสานข้อมูล
ไม่ผ่านขบวนการ
ผสานข้อมูล
To be held on May, 2012 at EXPO2012 Yeosu Korea.

19. Computational run WRF Model on Marine Meteorological Center
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
Computational run WRF Model on Marine Meteorological Center
ftp
Visualize v
ftp
domain
ftp
Archive output -download GFS data
Visualize wrf output -convert to graphic -convert to others/web
โดเมนสำหรับการประมวลผล
ftp
To be held on May, 2012 at EXPO2012 Yeosu Korea.

20. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
VirtualWeather3D
To be held on May, 2012 at EXPO2012 Yeosu Korea.

21. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
Results
NOGAPS-WAM
Winds and waves field are reasonable with extreme event.
The north east monsoon winds which was blowing over the Gulf of Thailand, was abnormal when the tropical depression in Indian Ocean was progress and stronger and became tropical storm.
The spiral band of Cyclone had connected with the monsoon winds, and induced north east monsoon to be strongly. The strong winds had built huge waves hit along the eastern coastline of southern part of Thailand during December , 2011
WRF-WAM
To be held on May, 2012 at EXPO2012 Yeosu Korea.

22. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
Results
WAM-WRF
WAM-NOGAPS
WAM-WRF
WAM-NOGAPS
WAM-WRF
WAM-NOGAPS
WAM-WRF
WAM-NOGAPS
WAM-WRF
WAM-NOGAPS
WAM-WRF
WAM-NOGAPS
To be held on May, 2012 at EXPO2012 Yeosu Korea.

23. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
Conclusions
When comparison the results of the WAM which used low resolution winds from NOGAPS as 1x1 degree latitude and longitude and high resolution winds from WRF as 5x5 km.
WAM using wind data from the WRF will produce waves that are more finer than the results of the WAM using wind data from NOGAPS.
High-resolution winds reflected sea state near the coast, more than low-resolution winds, when input to ocean wave model.
To be held on May, 2012 at EXPO2012 Yeosu Korea.

24. Marine Meteorological Disaster Warning System Project
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
Further work
Marine Meteorological Disaster Warning System Project
HF Radar
To be held on May, 2012 at EXPO2012 Yeosu Korea.

25. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
HF radar in Thailand
To be held on May, 2012 at EXPO2012 Yeosu Korea.

26. To be held on 23-31 May, 2012 at EXPO2012 Yeosu Korea.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
Acknowledgements
This paper is supported jointly by Thai Meteorological Department, and JCOMM.
Thanks to Dr.Songkran Agsorn and Director – General of Thai Meteorological Department for their encouragement and
Thanks to Dr. David Meldrum for information and suggestion.
Thanks to Korean local staff s for helping and kindness.
To be held on May, 2012 at EXPO2012 Yeosu Korea.

27. Thank you for attention.
The Fourth Session of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM-4),
Thank you for attention.
To be held on May, 2012 at EXPO2012 Yeosu Korea.