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RISInitial Testing of a Massively Parallel Ensemble Kalman Filter with the Poseidon Isopycnal Ocean General Circulation Model
Publisher: American Meteorological Society
Abstract: A multivariate ensemble Kalman filter (MvEnKF) implemented on a massively parallel computer architecture has been developed for the Poseidon ocean circulation model and tested with a Pacific basin model configuration. There ...
North Pacific Subtropical–Tropical Gyre Exchanges in the Thermocline: Simulations with Two Isopycnic OGCMs
Publisher: American Meteorological Society
Abstract: This study considers the advective transport in the thermocline between the subtropical and tropical Pacific using two different models: MICOM (fully isopycnal) and Poseidon (quasi-isopycnal). The annually averaged model ...
Frontogenesis in the North Pacific Oceanic Frontal Zones—A Numerical Simulation
Publisher: American Meteorological Society
Abstract: A primitive equation model [Geophysical Fluid Dynamics Laboratory?s (GFDL?s) MOM 2] with one degree horizontal resolution is used to simulate the seasonal cycle of frontogenesis in the subarctic frontal zone (SAFZ) and the ...
The Time-varying Characteristics of the Meridional Ekman Heat Transport for the World Ocean
Publisher: American Meteorological Society
Abstract: The time-varying meridional Ekman heat transport for the World Ocean is calculated for the 30-year period 1960?1989 using wind stress and sea surface temperature data from the Comprehensive Ocean?Atmosphere Data Set The ...
Bred Vectors and Tropical Pacific Forecast Errors in the NASA Coupled General Circulation Model
Publisher: American Meteorological Society
Abstract: The breeding method has been implemented in the NASA Global Modeling and Assimilation Office coupled general circulation model (CGCM) in its operational configuration in which ocean data assimilation is used to initialize ...
Meridional Ekman Heat Transport: Estimates from Satellite Data
Publisher: American Meteorological Society
Abstract: Analyses of satellite-derived SSM/I winds and AVHRR sea surface temperatures are used to compute weekly estimates of global meridional ocean Ekman heat transport for the 4-year period 1987?1991. The heat transport is ...
Dynamical Interpolation and Forecast of the Evolution of Mesoscale Features off Northern California
Publisher: American Meteorological Society
Abstract: The series of cruises off Northern California comprising OPTOMA11, during two months in summer 1984, were specifically designed as an ocean prediction experiment. In addition to a regional survey from Cape Mendocino to ...
Surface Heat Balance in the Equatorial Pacific Ocean: Climatology and the Warming Event of 1994–95
Publisher: American Meteorological Society
Abstract: The surface heat budget in the equatorial Pacific Ocean was investigated through ocean model simulations, both the climatological cycle and the case of the 1994?95 warm event. The dominant processes governing the seasonal ...
The Role of Daily Surface Forcing in the Upper Ocean over the Tropical Pacific: A Numerical Study
Publisher: American Meteorological Society
Abstract: The impacts of high-frequency surface forcing in the upper ocean over the equatorial Pacific are investigated using a nonlinear reduced-gravity isopycnal ocean circulation model forced by daily and monthly mean forcing. ...
Multivariate Error Covariance Estimates by Monte Carlo Simulation for Assimilation Studies in the Pacific Ocean
Publisher: American Meteorological Society
Abstract: One of the most difficult aspects of ocean-state estimation is the prescription of the model forecast error covariances. The paucity of ocean observations limits our ability to estimate the covariance structures from ...