Validation Test Report for the 1/8 deg Global Navy Coastal Ocean Model Nowcast/Forecast System

Abstract

Standard Form 298 (Rev. 8-98)Prescribed by ANSI Std. Z39.18Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Approved for public release; distribution is unlimited. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S ACRONYM(S) 9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S REPORT NUMBER(S) Unclassified Unclassified Unclassified UL 149Charlie Barron (228) 688-5423 NCOM MODASThe global Naval Coastal Ocean Model (NCOM) is a 1/8° global application of NCOM developed by the Naval Research Laboratory (NRL) for use at the Naval Oceanographic Office (NAVOCEANO) as a part of an assimilative ocean model nowcast/forecast system. Global NCOM is the first operational global ocean model that has sufficient resolution to be eddy-permitting. Global NCOM supports predictions of ocean currents, temperatures, salinity, sea surface height, and sound speed both directly and by providing initial and boundary conditions for higher-resolution nested ocean models. The forecast system addresses Navy requirements for Numerical Modeling (METOC 9801), High Resolution Surface and Subsurface Currents (METOC 9308), Littoral Salinity Prediction (METOC 9902), and Air-Sea Drift Prediction (METOC 9115). This validation test report describes global NCOM, its use in an assimilative forecast system, and evaluation of assimilative and non-assimilative products using independent climatologies and observations.

Effect of tropical cyclones on residual circulation and momentum balance in a subtropical estuary and inlet: Observation and simulation

“…Tidal boundary condition for CH3D is obtained from ADCIRC tidal database for the east coast [Mukai et al, 2002] as tidal constituents at the offshore boundary of CH3D. Wind and atmospheric pressure during nonstorm time periods are obtained from the Navy Operational Global Atmospheric Prediction System (NOGAPS) model [Barron et al, 2007] output. During storm periods, 3 hourly or 6 hourly snapshots of the storm winds are obtained from the NOAA (National Oceanic and Atmospheric Administration) Hurricane Research Division (HRD) H*Wind 10 m reanalysis winds [Powell et al, 1998], and blended with the background NOGAPS winds [Paramygin, 2009].…”

Examining features of enhanced phytoplankton biomass in the Bay of Bengal using a coupled physical‐biological model

“…Initial and lateral boundary values for the physical model were constructed from the 1/88 Global NCOM physical fields [Barron et al, 2006[Barron et al, , 2007Rhodes et al, 2002]. These fields are sea surface height, temperature, salinity, and ocean currents.…”

Initial evaluations of a Gulf of Mexico/Caribbean ocean forecast system in the context of the Deepwater Horizon disaster

“…In 2010, the global-scale host model was the Global Navy Coastal Ocean Model (GNCOM, Rhodes et al, 2002); since replaced by the Navy Global Hybrid Coordinate Ocean Model (GHYCOM; Chassignet et al, 2009). The dynamical core of the GNCOM system was NCOM, a four-dimensional, primitive-equation, free-surface, hydrostatic ocean model that uses hybrid (sigma-and z-level) coordinates in the vertical (Martin, 2000;Barron et al, 2007). GNCOM had a nominal horizontal resolution of 1/8°at mid-latitudes, with 40 depth levels (19 sigma levels in shallow water and 21 z-levels below 137 m depth).…”