HYCOM + NCODA Global 1/12° GOFS 3.1 41-layer Reanalysis (GLBv0.08 Experiment 53.X): daily snapshot at t000
The HYCOM Consortium provides a gridded reanalysis product based on Hybrid Coordinate ocean Model (HYCOM) and the Navy Coupled Ocean Data Assimilation (NCODA).
Experiments:
53.0 (Jan 1, 1994 to Mar 31, 1999)
53.1 (Apr 1, 1999 to Dec 31, 2000)
53.2 (Jan 1, 2001 to Jun 30, 2003)
53.3 (Jul 1, 2003 to Jun 30, 2005)
53.4 (Jul 1, 2005 to Jun 30, 2007)
53.5 (Jul 1, 2007 to Jun 30, 2009)
53.6 (Jul 1, 2009 to Jun 30, 2011)
53.7 (Jul 1, 2011 to Jun 30, 2013)
53.8 (Jul 1, 2013 to Dec 30, 2014)
53.9 (Jan 1, 2015 to Dec 30, 2015)
Data Assimilation
The system uses the Navy Coupled Ocean Data Assimilation (NCODA) system (Cummings, 2005; Cummings and Smedstad, 2013) for data assimilation. NCODA uses the 24-hour model forecast as a first guess in a 3D variational scheme and assimilates available satellite altimeter observations, satellite, and in-situ sea surface temperature as well as in-situ vertical temperature and salinity profiles from XBTs, Argo floats and moored buoys. Surface information is projected downward into the water column using Improved Synthetic Ocean Profiles (Helber et al., 2013).
What are the major differences between GOFS 3.1 & GOFS 3.0?
Note: This dataset is enormous. Please download small volumes at a time.
Disclaimer:
This dataset is created at NRL and provided "as is".
(Helber, R.W., T.L. Townsend, C.N. Barron, J.M. Dastugue and M.R. Carnes, 2013)
Helber, R.W., T.L. Townsend, C.N. Barron, J.M. Dastugue and M.R. Carnes, 2013: Validation Test Report for the Improved Synthetic Ocean Profile (ISOP) System, Part I: Synthetic Profile Methods and Algorithm. NRL Memo. Report, NRL/MR/7320—13-9364.
(Cummings and Smedstad, 2013)
J. A. Cummings and O. M. Smedstad. 2013: Variational Data Assimilation for the Global Ocean. Data Assimilation for Atmospheric, Oceanic and Hydrologic Applications vol II, chapter 13, 303-343.
(Cummings, 2005)
Cummings, J.A., 2005: Operational multivariate ocean data assimilation. Quart. J. Royal Met. Soc., Part C, 131(613), 3583-3604.
Interpolated Daily Snapshot:
The original dataset is missing almost six hundred t000 output. If t000 is missing and the t021
data from the day before and the t003 data exist the mean of the two is provided in the "Interpolated daily snapshot". The new dataset still contains 17 missing days:
Variables
SSH (m), eastward velocity (m/s), northward velocity (m/s), temperature (not potential temperature) (°C), and salinity (psu).
Zonal
Global by varies
Meridional
0.08° resolution between 40°S and 40°N, 0.04° poleward of these latitudes
The APDRC may be acknowledged as follows: Data provided by
Asia-Pacific Data Research Center, which is a part of the International Pacific Research Center
at the University of Hawaiʻi at Mānoa, funded in part by the National Oceanic and Atmospheric Administration (NOAA).