| Upper-Ocean Processed Under the Stratus Cloud Deck in the Southeast Pacific Ocean |
19 Jan 2010 |
19 pages |
| Authors:
Yangxing Zheng; Toshiaki Shinoda; George N Kiladis; Jialin Lin; E J Metzger; Harley E Hurlburt; Benjamin S Giese; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
 | The annual mean heat budget of the upper ocean beneath the stratocumulus/stratus cloud deck in the southeast Pacific is estimated using Simple Ocean Data Assimilation (SODA) and an eddy-resolving Hybrid Coordinate Ocean Model (HYCOM). Both are compared with estimates based on Woods Hole Oceanographic Institution (WHOI) Improved Meteorological (IMET) buoy observations at 20 deg S, 85 deg W. Net surface heat fluxes are positive (warming) over most of the area ... |
|
| Real-time Data Assimilation of Ice Concentration into a Coupled Ice/Ocean Forecast System |
15 Jan 2010 |
5 pages |
| Authors:
P G Posey; E J Metzger; A J Wallcraft; O M Smedstad; W M Phelps; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| Since the late 1980's, ice forecasting systems developed by the Naval Research Laboratory (NRL) have been predicting conditions in the Arctic Ocean and several of its marginal seas for use by the U.S. Navy. Each day a 120-hour forecast of ice drift, ice thickness and ice concentration is run operationally at the Naval Oceanographic Office (NAVOCEANO). Presently, a high resolution Arctic two-way coupled ice/ocean nowcast/forecast system based on the Community ... |
|
| Can an Atmospherically Forced Ocean Model Accurately Simulate Sea Surface Temperature During ENSO Events? |
Jan 2010 |
17 pages |
| Authors:
A B Kara; Harley E Hurlburt; Charlie N Barron; Alan J Wallcraft; E J Metzger; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The performance of an atmospherically forced ocean general circulation model (OGCM) in simulating daily and monthly sea surface temperature (SST) is examined during the historical El Nino Southern Oscillation (ENSO) events during the time period 1993 -2003. For this purpose, we use the HYbrid Coordinate Ocean Model (HYCOM) configured for the North Pacific north of 20 degrees S at a resolution of =9 km. There is no assimilation of (or ... |
|
| Upper-Ocean Processes under the Stratus Cloud Deck in the Southeast Pacific Ocean |
Jan 2010 |
20 pages |
| Authors:
Yangxing Zheng; Toshiaki Shinoda; George N Kiladis; Jialin Lin; E J Metzger; Harley E Hurlburt; Benjamin S Giese; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
|
| The annual mean heat budget of the upper ocean beneath the stratocumulus/stratus cloud deck in the southeast Pacific is estimated using Simple Ocean Data Assimilation (SODA) and an eddy-resolving Hybrid Coordinate Ocean Model (HYCOM). Both are compared with estimates based on Woods Hole Oceanographic Institution (WHOI) Improved Meteorological (IMET) buoy observations at 208S, 858W. Net surface heat fluxes are positive (warming) over most of the area under the stratus cloud ... |
|
| Comparisons of Monthly Mean 10 M Wind Speeds from Satellites and NWP Products Over the Global Ocean |
09-Oct-2009 |
15 pages |
| Authors:
Charlie Barron; E J Metzger; Alan J Wallcraft; Ahmet B Kara; R Pauley; M Bourassa; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The accuracy of wind speed at 10 m above the sea surface from two satellite and three numerical weather prediction (NWP) products is investigated over the global ocean. Rain-free equivalent neutral winds from the Quick Scatterometer (QuikSCAT) are converted to stability-dependent winds to be consistent with those from NWP products and are taken as truth in comparisons to winds from other products. Quantitative statistical analyses presented at each grid point ... |
|
| High-Resolution Global and Basin-Scale Ocean Analyses and Forecasts |
Sep-2009 |
19 pages |
| Authors:
Eric P Chassignet; Hiroyuki Tsujino; Benoit Tranchant; Andreas Schiller; Timothy F Pugh; Peter R Oke; Jean-Michel Lellouche; Olivier Galloudec; Gregg A Le Jacobs; Romain Bourdalle-Badie; Mounir Benkiran; Masafumi Kamachi; Yann Drillet; Gary B Brassington; Alan J Wallcraft; E J Metzger; Ole M Smedstad; Harley E Hurlburt; Norihisa Usui; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEAN DYNAMICS AND PREDICTION BRANCH
|
| The feasibility of global ocean weather prediction was just emerging as the Global Ocean Data Assimilation Experiment (GODAE) began in 1997. Ocean weather includes phenomena such as meandering currents and fronts, the surface mixed layer and sea surface temperature (SST), waves, upwelling of cold water, all influencing ocean variables such as temperature (T), salinity (S), currents, and sea surface height (SSH). Adequate real-time data input, computing power, numerical ocean models, ... |
|
| Comparisons of Monthly Mean 10 m Wind Speeds from Satellites and NWP Products over the Global Ocean |
Aug-2009 |
15 pages |
| Authors:
E J Metzger; A J Wallcraft; C N Barron; A B Kara; R L Pauley; M A Bourassa; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The accuracy of wind speed at 10 m above the sea surface from two satellite and three numerical weather prediction (NWP) products is investigated over the global ocean. Rain-free equivalent neutral winds from the Quick Scatterometer (QuikSCAT) are converted to stability-dependent winds to be consistent with those from NWP products and are taken as truth in comparisons to winds from other products. Quantitative statistical analyses presented at each grid point ... |
|
| U.S. GODAE: Global Ocean Prediction With the HYbrid Coordinate Ocean Model (HYCOM) |
Jun-2009 |
15 pages |
| Authors:
Eric P Chassignet; Francisco Werner; Ruoying He; Alexander Barth; Robert Weisberg; Peter Cornillon; Steve Hankin; Ashwanth Srinivasan; Hendrik L Tolman; Carlos Lozano; Alan J Wallcraft; Remy Baraille; Rainer Bleck; George R Halliwell; James A Cummings; Ole M Smedstad; E J Metzger; Harley E Hurlburt; John Wilkin; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| During the past five to ten years, a broad partnership of institutions under NOPP sponsorship has collaborated in developing and demonstrating the performance and application of eddy-resolving, real-time global- and basin-scale ocean prediction systems using the HYbrid Coordinate Ocean Model (HYCOM) The partnership represents a broad spectrum of the oceanographic community, bringing together academia, federal agencies, and industry/commercial entities ,, and spanning modeling, data assimilation, data management and serving, observational ... |
|
| US GODAE: Global Ocean Prediction with the Hybrid Coordinate Ocean Model (HYCOM) |
Jun-2009 |
16 pages |
| Authors:
Rainer Bleck; Francisco Werner; Ruoying He; Robert Weisberg; Ashwanth Srinivasan; Hendrik L Tolman; Alan J Wallcraft; Peter Cornillon; E J Metzger; James A Cummings; Ole M Smedstad; Harley E Hurlburt; George R Halliwell; Eric P Chassignet; Alexander Barth; Steve Hankin; Remy Baraille; Carlos Lozano; John Wilkin; FLORIDA STATE UNIV TALLAHASSEE CENTER FOR OCEAN-ATMOSPHERIC PREDICTION STUDIES
|
| During the past five to ten years, a broad partnership of institutions under NOPP sponsorship has collaborated in developing and demonstrating the performance and application of eddy-resolving, real-time global- and basin-scale ocean prediction systems using the HYbrid Coordinate Ocean Model (HYCOM). The partnership represents a broad spectrum of the oceanographic community, bringing together academia, federal agencies, and industry/commercial entities, and spanning modeling, data assimilation, data management and serving, observational capabilities, ... |
|
| Global Ocean Forecast System (GOFS) Version 3.0 (User's Manual) |
12-Mar-2009 |
76 pages |
| Authors:
E J Metzger; O M Smedstad; S N Carroll; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The User's Manual describes the sequence of scripts for the Global Ocean Forecast System (GOFS) Version 3.0 that consists of the 1/12 degree global HYbrid Coordinate Ocean Model (HYCOM) and uses the Navy Coupled Ocean Data Assimilation scheme that is run daily in the normal processing stream at the Naval Oceanographic Office (NAVOCEANO). It is geared toward NAVOCEANO operators rather than a scientific researcher using HYCOM. The appendices contain the ... |
|
| User's Manual for the Global Ocean Forecast System (GOFS) Version 3.0 |
12-Mar-2009 |
74 pages |
| Authors:
E J Metzger; O M Smedstad; S N Carroll; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEAN DYNAMICS AND PREDICTION BRANCH
|
| This User's Manual describes the sequence of scripts for the Global Ocean Forecast System (GOFS) Version 3.0 that consists of the 1/12 degree global HYbrid Coordinate Ocean Model (HYCOM) and uses the Navy Coupled Ocean Data Assimilation scheme that is run daily in the normal processing stream at the Naval Oceanographic Office (NAVOCEANO). It is geared toward NAVOCEANO operators rather than a scientific researcher using HYCOM. The appendices contain the ... |
|
| Software Design Description for the HYbrid Coordinate Ocean Model (HYCOM), Version 2.2 |
12-Feb-2009 |
157 pages |
| Authors:
E J Metzger; A J Wallcraft; S N Carroll; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| This document describes the software design and code of the HYbrid Coordinate Ocean Model (HYCOM) version 2.2. It includes the mathematical formulation and solution procedures for HYCOM 2.2 as well as flow charts and descriptions of the programs, modules, and subroutines. |
|
| User's Manual for the Polar Ice Prediction System (PIPS) Version 3.0 |
05-Nov-2008 |
84 pages |
| Authors:
E J Metzger; Lucy F Smedstad; Suzanne N Carroll; Pamela G Posey; Ruth H Preller; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The Polar Ice Prediction System (PIPS) Version 3.0 is a dynamic sea-ice model that forecasts conditions in all sea-ice covered areas in the northern hemisphere (down to 30 degrees north in latitude). It has a horizontal resolution of approximately 9 km. The vertical resolution in the model has been set at 45 levels so that Arctic shelves, continental slopes, and submarine ridges are accurately represented. Currently, the domain includes the ... |
|
| Steering of Upper Ocean Currents and Fronts by the Topographically Constrained Abyssal Circulation |
06-Jul-2008 |
35 pages |
| Authors:
Harley E Hurlburt; Patrick J Hogan; E J Metzger; Charles E Tilburg; Jay F Shriver; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| A two-layer theory is used to investigate (1) the steering of upper ocean current pathways by topographically constrained abyssal currents that do not impinge on the bottom topography and (2) its application to upper ocean - topographic coupling via flow instabilities where topographically constrained eddy-driven deep mean flows in turn steer the mean pathways of upper ocean currents and associated fronts. In earlier studies the two-layer theory was applied to ... |
|
| Summer Generation of the Southern Gulf of California Eddy Train |
24-Jun-2008 |
|
| Authors:
Luis Zamudio; Patrick J Hogan; E J Metzger; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
 | Ocean color and sea surface temperature satellite-observations show the existence of a series of anticyclonic eddies along the axis of the southern Gulf of California (SGOC). To investigate the summer generation of these eddies, a regional version of the HYbrid Coordinate Ocean Model (HYCOM) has been configured for the GOC and has been nested inside the global model. A Suite of experiments, using the nested GOC model, was developed and ... |
|
| Flow Through the Straits of the Philippine Archipelago Simulated by Global HYCOM and EAS NCOM |
Jan-2008 |
11 pages |
| Authors:
Harley E Hurlburt; E J Metzger; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| We plan to collaborate with other DRI participants to better evaluate and understand the dynamics seen in observations and model results within the Philippine Archipelago, a strategic region with numerous straits. Objectives for our DRI participation are (1) high resolution simulations (with and without tides; with and without data assimilation) which provide a larger scale context for the observations, (2) model data comparisons with the measurements, (3) studies of observational ... |
|
| Hindcasting of Wind-Driven Anomalies Using a Reduced-Gravity Global Ocean Model |
Jan-1992 |
12 pages |
| Authors:
Harley E Hurlburt; E J Metzger; John C Kindle; Ziv Sirkes; James M Pringle; NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS
|
| Global versions of the Navy Layered Ocean Model are used to hindcast wind-driven oceanic anomalies. These versions are reduced-gravity with lowest layer infinitely deep and at rest, and grid resolutions of 1/2 deg and 1/4 deg are used. Winds at the 1000 millibar level from the European Centre for Medium-Range Weather Forecasts (ECMWF) are used as forcing functions for the models over the 1981 to 1989 time frame. The ability ... |
|
Reports by Author
