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Validation Test Report for the Global Ocean Forecast System V3.0 - 1/12 deg HYCOM-NCODA: Phase II.

ADA518693

Publication Date	2010
Personal Author	Metzger, E. J.; Hurlburt, H. E.; Wallcraft, A. J.; Shriver, J. F.; Townsend, T. L.
Page Count	74
Abstract	Global Ocean Forecast System Version 3.0 (V3.0) is comprised of the 1/12 deg global HYbrid Coordinate Ocean Model (HYCOM) and the Navy Coupled Ocean Data Assimilation (NCODA) system. It is a next-generation system capable of nowcasting and forecasting the oceanic 'weather,' which includes the three- dimensional ocean temperature, salinity and current structure, the surface mixed layer and the location of mesoscale features such as eddies, meandering currents and fronts. V3.0 is scheduled to replace the existing nowcast/forecast system (V2.6) based on the 1/8 deg Navy Coastal Ocean Model (NCOM), 1/32 deg Navy Layered Ocean Model (NLOM), 1/8 deg Modular Ocean Data Analysis System (MODAS) and NCODA. This Phase II report describes the validation testing performed on one-year hindcasts of V3.0 and V2.6. A few Phase I tasks (temperature vs. depth and acoustical proxy error analyses) have been re- evaluated along with new evaluations examining a) each system as a provider of boundary conditions to a regional nested model, b) 14-day forecast skill relative to climatology and persistence of temperature vs. depth, c) 14-day forecast skill of acoustical proxies, d) 14-day forecast skill of sea surface height and sea surface temperature, and e) a velocity comparison against glider and drifting buoy observations. Overall, this report has determined that GOFS V3.0 is performing equal to or notably better than GOFS V2.6. The superior performance of V3.0 is especially evident in providing boundary contitions to regional nested models, an important function of a global ocean nowcast/forecast system.
Keywords	Oceanographic data Forecasting Temperature Global Weather Ocean surface Validation Comparison Surfaces Boundaries Drift Error analysis Mixing Oceans Salinity Climatology Surface temperature Height Gliders Buoys Nowcasting Test and evaluation Velocity
Source Agency	Non Paid ADAS
NTIS Subject Category	55C - Meteorological Data Collection, Analysis, & Weather Forecasting 47C - Physical & Chemical Oceanography
Corporate Authors	Naval Research Lab., Stennis Space Center, MS. Oceanography Div.
Supplemental Notes	The original document contains color images.
Document Type	Technical Report
Title Note	Memo. rept.
NTIS Issue Number	201017

Validation Test Report for the Global Ocean Forecast System V3.0 - 1/12 deg HYCOM-NCODA: Phase II.

Validation Test Report for the Global Ocean Forecast System V3.0 - 1/12 deg HYCOM-NCODA: Phase II.
ADA518693

Publication Date	2010
Personal Author	Metzger, E. J.; Hurlburt, H. E.; Wallcraft, A. J.; Shriver, J. F.; Townsend, T. L.
Page Count	74
Abstract	Global Ocean Forecast System Version 3.0 (V3.0) is comprised of the 1/12 deg global HYbrid Coordinate Ocean Model (HYCOM) and the Navy Coupled Ocean Data Assimilation (NCODA) system. It is a next-generation system capable of nowcasting and forecasting the oceanic 'weather,' which includes the three- dimensional ocean temperature, salinity and current structure, the surface mixed layer and the location of mesoscale features such as eddies, meandering currents and fronts. V3.0 is scheduled to replace the existing nowcast/forecast system (V2.6) based on the 1/8 deg Navy Coastal Ocean Model (NCOM), 1/32 deg Navy Layered Ocean Model (NLOM), 1/8 deg Modular Ocean Data Analysis System (MODAS) and NCODA. This Phase II report describes the validation testing performed on one-year hindcasts of V3.0 and V2.6. A few Phase I tasks (temperature vs. depth and acoustical proxy error analyses) have been re- evaluated along with new evaluations examining a) each system as a provider of boundary conditions to a regional nested model, b) 14-day forecast skill relative to climatology and persistence of temperature vs. depth, c) 14-day forecast skill of acoustical proxies, d) 14-day forecast skill of sea surface height and sea surface temperature, and e) a velocity comparison against glider and drifting buoy observations. Overall, this report has determined that GOFS V3.0 is performing equal to or notably better than GOFS V2.6. The superior performance of V3.0 is especially evident in providing boundary contitions to regional nested models, an important function of a global ocean nowcast/forecast system.
Keywords	Oceanographic data Forecasting Temperature Global Weather Ocean surface Validation Comparison Surfaces Boundaries Drift Error analysis Mixing Oceans Salinity Climatology Surface temperature Height Gliders Buoys Nowcasting Test and evaluation Velocity
Source Agency	Non Paid ADAS
NTIS Subject Category	55C - Meteorological Data Collection, Analysis, & Weather Forecasting 47C - Physical & Chemical Oceanography
Corporate Authors	Naval Research Lab., Stennis Space Center, MS. Oceanography Div.
Supplemental Notes	The original document contains color images.
Document Type	Technical Report
Title Note	Memo. rept.
NTIS Issue Number	201017