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HYCOM for the Hawaiian Islands Region

The Hybrid Coordinate Ocean Model (HYCOM) is implemented for the Hawaiian Islands region at various horizontal resolutions and domain sizes. The lateral open boundaries are either forced by output from the HYCOM Consortium's near real-time global ocean prediction system (at a resolution of 0.08 degree) or output from a regional HYCOM implementation that has a larger domain size and a coarser horizontal resolution (0.04 degree or finer). The vertical resolution of the regional HYCOM is the same as the global system (32 layers in all with 28 active layers in the Hawaiian Islands region). For the surface atmospheric forcing, either the NOGAPS or the output from a regional atmospheric system (WRF) is used. No data assimilation is included in the regional configurations at present. Original model layer variables are interpolated onto 20 z-levels before being put on the server.

The main Hawaiian Islands region (HAWb0.04):
Experiment 01.5 - with NOGAPS (0.5 degree) for surface forcing.

Experiment 01.2 - with WRF (0.16 degree) for surface forcing.
   This experiment is performed in the same way as experiment 01.5 except that the surface atmospheric forcing comes from the output of a regional atmospheric system, WRF, at a resolution of 18 Km (~ 0.16 degree).

Experiment 01.3 - with WRF (0.16 degree) for surface forcing.
   This experiment is the same as experiment 01.2 except that it is re-initialized every 10 days with the ocean state of the real-time HYCOM global prediction system. The initializations dates are June 23, July 3, 13, 23, August 2, 12, 22, September 1, 11, and so on.

Experiment 01.6 - with NOGAPS (0.5 degree) for surface forcing.
   This experiment is the same as experiment 01.5 except that it is re-initialized every 10 days with the ocean state of the real-time HYCOM global prediction system. The initializations dates are June 23, July 3, 13, 23, August 2, 12, 22, September 1, 11, and so on.

Experiment 01.7 - with WRF (0.056 degree) for surface forcing.
   This experiment is performed in the same way as experiment 01.5 except that the surface atmospheric forcing comes from the output of a regional atmospheric system, WRF, at a resolution of 6 Km (~ 0.056 degree), and that it is initialized with the ocean state of the latest global HYCOM reanalysis on a daily basis and integrated to two days ahead of the present time. The time series begins at 0Z, April 1, 2009 at 3-hourly intervals.

Variables	Sea Surface Height (m), Potential Temparature (°C), Salinity (psu), Eastward Total velocity (m/s), Northward Total velocity (m/s)
Zonal	166W to 150W by 0.04 deg
Meridional	16.027N to 25.945N by 0.04 deg
Vertical	1.5, 5, 10, 20, 30, 50, 75, 100, 125, 150, 200, 300, 400, 600, 800, 1000, 1500, 2000, 3000, 4000 m
Temporal	Jun 24, 2007 to Jun 30, 2008 by 1 day(s)
Initialization	The ocean state on June 23, 2007 of the real-time HYCOM global ocean prediction system.
Lateral boundary forcing	output of the real-time HYCOM global ocean prediction system
Static?	no
Volume	34.5 MB/Day
Server	private:
Source	HYCOM Consortium
Acquired	Jul 25, 2008 (Updated Oct 27, 2008)
APDRC contact

The region surrounding the Island of Oahu (OAHa0.02):
Experiment 01.5 - with NOGAPS (0.5 degree) for surface forcing.

Variables	Sea Surface Height (m), Potential Temparature (deg.C), Salinity (psu), Eastward Total velocity (m/s), Northward Total velocity (m/s)
Zonal	158.8W to 157.2W by 0.02 deg
Meridional	20.508 to 22.147N by 0.02 deg
Vertical	1.5, 5, 10, 20, 30, 50, 75, 100, 125, 150, 200, 300, 400, 600, 800, 1000, 1500, 2000, 3000, 4000 m
Temporal	Jun 25, 2007 to Jun 30, 2008 by 1 day(s)
Initialization	The ocean state on June 24, 2007 of the regional HYCOM for the main Hawaiian Islands (HAWb0.04), Experiment 01.5.
Lateral boundary forcing	output of the regional HYCOM for the main Hawaiian Islands (HAWb0.04), Experiment 01.5.
Static?	no
Volume	2.3 MB/Day
Server	private:
Source	HYCOM Consortium
Acquired	May 1, 2009
APDRC contact

The Oahu South Shore (OSSa0.01):
Experiment 01.5 - with NOGAPS (0.5 degree) for surface forcing.

Variables	Sea Surface Height (m), Potential Temparature (deg.C), Salinity (psu), Eastward Total velocity (m/s), Northward Total velocity (m/s)
Zonal	158.26W to 157.68W by 0.01 deg
Meridional	20.807 to 22.479N by 0.01 deg
Vertical	1.5, 5, 10, 20, 30, 50, 75, 100, 125, 150, 200, 300, 400, 600, 800, 1000, 1500, 2000, 3000, 4000 m
Temporal	Jun 26, 2007 to Jun 30, 2008 by 1 day(s)
Initialization	The ocean state on June 25, 2007 of the regional HYCOM for the Island of Oahu (OAHa0.02), Experiment 01.5.
Lateral boundary forcing	output of the regional HYCOM for the Island of Oahu (OAHa0.02), Experiment 01.5.
Static?	no
Volume	1.4 MB/Day
Server	private:
Source	HYCOM Consortium
Acquired	May 1, 2009
APDRC contact