The Shelf-Sea operational oceanography systems in NMEFC
Representer : KUANG Xiaodi Work of Hui Wang, Guimei Liu, Jiang Zhu,
Dakui Wang, Guokun Lv, Xiaodi Kuang National Marine Environmental Forecasting Center
Puerto Rico,2014,01,21
The Shelf-Sea operational oceanography systems in NMEFC
The Shelf-Sea operational oceanography systems in NMEFC
National Marine Environmental Forecasting Center
Established in 1965
Receiving data by radio wave
NMEFC issues marine hazards and environmental forecast products, including
storm surge, huge wave, sea Ice, El-Nino, tsunami, sea temperature, current, salinity,
Oil Spill, Green Tide, search and rescue…
Storm surge Tsunami Sea Ice
Red tide Oil spill Current
Tourist Destination
Seasonal ENSO forecast
Forecasting products
Warnings
Storm surge Wave
Tsunami
Sea ice
Environmental Forecast
SST Current Red tide
Green tide
ENSO &Climate
Marine weather Marine emergency
Leakage Search and
rescue Oil spill
... ...
2/3/2014
Buoys & Radars
Buoys maintained by SOA
• 18 large-size buoys for meteorology and
wave height, seawater temp., et al.;
• 2 offshore small-size buoys;
• 2 Deep-sea Moorings;
• 4 offshore bottom-mounted moorings;
• 2 tsunami buoys;
Radars maintained by SOA
• 5 Ground wave Radar for current, wave
field
• 2 X-band Marine Radar for wave field
• 1 Radar Ice Sounder for Sea ice regime,
thickness
Network
and Computation System IBM system
Sunway system 26 Tflops
Satellite network for data transfer
2/3/2014
Dissemination
To the public by: •TV programs (national and regional TV channels like CCTV, et al.) • Broadcasting programs (CCBS) • Website • Microblog • Newspaper • LCD in the fishery ports or beach
To the governments and concerned department by: • Digital fax using parallel tech. • Short messages • Telephone
High-performance studios
3 3. Northwest Pacific
4
1 1. Global ocean
2
2. Indian Ocean
4. East China Sea
5 5. South China Sea
6
6. Polar regions
Chinese Global operational Oceanography Forecasting System
(CGOFS v1.0)
Temp
Salinity
Current
Wave
Wind
Sea Ice
1°/4
1°/30
SCS
ECS
NCEP/GFS Wind
Real-time OBS
Global
Design and Framework
Global Indian ocean Northwest Pacific East/South China Seas
Res. 1°/4,50 L 1°/12,20L 1°/20,22L 1°/30,30(36) L
Model MOM4 ROMSv3.5
Wind forcing
GFS/CGOFS-wind NMEFC-WRF
DA scheme 3DVar EnOI
DA data RTGSST,SSH,
Argo T/S
MGDSST
SSH
MGDSST
SSH
MGDSST,SSH,Argo
T/S
Products Temperature, Salinity、current (surface,20m,50m,100m,200m,500m &
1000m,sections)
Time 120hr
Release To:website, specific users, decision making
As: Data & figures
CGOFS
-Circulation
Global Indian Ocean Northwest Pacific East/South China Seas
Res. 1°/3 1°/6 1°/10 1°/30
Model NWW3 SWAN
Wind forcing NCEP/GFS WRF
DA scheme OI
DA data HY-2 significant wave height
Products significant wave height,period,direction
Time 120hr
Release To: website & specific users with data and figures
CGOFS
-WAVE
Temp Salinity Current
Wave Wind Sea Ice
Surface Current Surface Temperature
Applications of CGOFS
Escort mission in the Gulf of Arden
Radioactive Monitoring
Antarctic Support
Submersible Jiaolong
Arctic support
Zhongshan Station Great Wall Station
Fishery fields
Oil spill
Search and Rescue
“JIAOLONG” Submersible
Fisheries security
Etc.
Improvements in South China Sea Circulation System
Assimilation Experiments in South China Sea
(1) Climatology run for 10 years (2) Ctrl run from 2000-2008 : Qscat wind + Oaflux (3) FGAT run : Assimilation TSLA considering error caused by observation time (4) NoFGAT run: Assimilation TSLA without considering error caused by observation time (3) and (4) from 2004-2006
Residual Sea Level error
Spatial distribution of Sea Level Anomaly RMSE for the Ctrl run(left), FGAT (middle) NoFGAT(right)
Temporal distribution of Sea Level Anomaly RMSE for Ctrl run(blue:10.57 cm), the FGAT (black :7.01) and NoFGET (red : 6.70cm)
Regional assimilation
Stand deviation of sea level
AVISO FGAT HYCOM EAST
CTRL NoFGAT
Temperature and Salinity
Dep (m)
RMSE of Temp(℃) CTRL FGET NoFGET
RMSE of Salinity (psu) CTRL FGAT NoFGAT
10 0.6439/0.3604/0.3578 0.6087/0.5265/0.5483
50 1.3186/1.0253/1.0360 0.6586/0.5498/0.5617
100 1.6760/1.2749/1.3270 0.2732/0.2233/0.2356
200 1.7346/1.2593/1.2535 0.1063/0.1160/0.1149
500 2.5042/1.8807/1.8863 0.1085/0.1228/0.1370
800 1.0830/0.8451/0.8482 0.0506/0.0704/0.0707
Buoy Trajectory
submersible buoy near Nansha Islands 2012(Jan.~Aug.) at 44m
submersible buoy near Xisha Islands, 2012(Jan.~Aug.) at 80m
FORECAST OBS
T-S dot · :OBS +:MOD
• Data source:CTD (multi- cruise)
• Correlation coefficient:0.982
Supervised by:an Army Institute、SCSIO
Data used:NEAR-GOOS buoys and ship report
(Oct.2011)、buoys near Hainan and Yuedong
(March 2011)
Product :significant wave height >= 1m
Error:24hr、48hr、72hr forecast relative error:
20%、21%、22.7%
On-going work
• Meso-scale diagnos: Eddies, fronts, thermocline, Pycnocline and upwelling.
• Effects introduced by waves: modified KPP scheme
(Qiao et.al. 2004)
Summary
• A Global operational oceanography forecast framework CGOFS, including circulation, temp, salinity, wave, wind and ice is established and validated.
• Assimilation method in South China Sea proves quite effective and has improved the model significantly.
Thank you
KUANG Xiaodi (Kelly KUANG) Mail:[email protected] CGOFS website:http://www.nmefc.gov.cn/cgofs/quanqiu_hailang.aspx
CAST (CGOFS-SCS) WANG Hui LIU Guimei
WANG Dakui LV Guokun
KUANG Xiaodi GAO Shan
JI Xuanliang
Acknowledgement ZHU Jiang and his team
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