NPACNFS
Experimental Real-Time
North Pacific Ocean Nowcast/Forecast System
Overview
| The North Pacific Ocean Nowcast/Forecast System (NPACNFS) is an automated real-time ocean prediction system for the North Pacific Ocean. It produces daily nowcast/forecast sea level variation, 3D current, temperature and salinity for the North Pacific Ocean from 16oS to 60oN and from 99oE to 77oW. |
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| NPACNFS consists a data assimilative dynamic ocean model (1/4o 26 levels NPACnf) based on POM (Princeton Ocean Model), a statistical 3D ocean temperature/salinity analysis model MODAS (Modular Ocean Data Assimilation System) and a real-time data stream from NRL/NAVO satellite data fusion center (see NRL Real Time Ocean Environment) and from NOGAPS (Navy Operational Global Atmospheric Prediction System) at FNMOC (Fleet Numerical Meteorology and Oceanography Center). |
| NPACnf model is restarted everyday from previous nowcast fields. Once model restarted, it continuously assimilates synthetic temperature/salinity fields generated by MODAS based on the satellite (GFO, TOPEX/Poseidon, ERS-2) sea surface height anomaly and (AVHRR) sea surface temperature, and forced with the surface heat fluxes, wind stress and surface air pressure from NOGAPS to produce the nowcast. Forecasts up to 72-hr are produced with available NOGAPS forecasts. |
| NPACNFS runs on the NRL Ocean Dynamics and Prediction Branch workstations. |
| Publications |
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| Ko, D.S., R.H. Preller, G.A. Jacobs, T.Y. Tang, and S.F. Lin, Transport reversals at Taiwan Strait during October and November, 1999, J. Geophys. Res., 108, 3370, doi:10.1029/2003JC001836, 2003. (PDF) |
| Lee, I-H, Meso-scale Eddies in the Western Pacific and Their Influences on the Kuroshio, Ph.D. thesis, Inst. of Oceanography, National Taiwan University, 99 pp., 2003. |
| Wu, X., Assessment of A North Pacific Data-Assimilating Ocean Circulation Model as a Means for Downscaling to a High-Resolution, Extended Prince William Sound Circulation Model, Master thesis, RSMAS, University of Miami, 122 pp., 2003. |
| Chapman, D.C., D.S. Ko, Ruth H. Preller, A high-resolution numerical modeling study of subtidal circulation in the northern South China Sea, IEEE J. Oceanic Engineering, 29(4), 1087-1104, 2004. |
| Hwang, C., C. Wu, and R. Kao, TOPEX/Poseidon observations of mesoscale eddies over the Subtropical Countercurrent: Kinematic characteristics of an anticyclonic eddy and a cyclonic eddy, J. Geophys. Res., 109, C08013, doi:10.1029/2003JC002026, 2004. |
| Ramp, S.R., T.Y. Tang, T.F. Duda, J.F. Lynch, A.K. Liu, C.-S. Chiu, F.L. Bahr, H.-R. Kim, and Y.-J. Yang, Internal solitons in the northern South China Sea Part I: Sources and deep water propagation, IEEE J. Oceanic Engineering, 29, 1157-1181, 2004. |
| Lin, I.-I., C.-C. Wu, K.A. Emanuel, I-H. Lee, C.-R. Wu, and L.-F. Pun, The interaction of Supertyphoon Maemi (2003) with a warm ocean eddy, Mon. Wea. Rev., 133, 2635-2649, 2005. |
| Weller, D.N., Subtidal Variability in the Northern South China Sea during Spring 2001, Master thesis, Naval Postgraduate School, 65 pp., 2005. |
| Pun, Iam-Fei, I.-I. Lin, C.-R. Wu, and D.S. Ko, Estimation of upper ocean thermal structure by satellite altimetry & its validation in the West Pacific Ocean for typhoon intensity forecast, IEEE Transactions on Geoscience and Remote Sensing, 45(6), 1616-1630, 2007. |
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Wu, C.-C., C.-Y. Lee, and I.-I. Lin, The effect of the ocean eddy on
tropical cyclone intensity, J. Atmos. Sci., 64, 3562-3578,
doi:10.1175/JAS4051.1, 2007.
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| NPACNFS System Components |
| NPAC Model Simulation | NPAC Model Topography |
Contact
| NPACNFS | D.S. Ko | |
|---|---|---|
| MODAS | M. Carnes | |
| Synthetics | C. Barron | |
| NOGAPS | P. Posey |
Nowcast/Forecast | Movies | Archive
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