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RISInterannual Sea Level Variations in the Tropical Indian Ocean from Geosat and Shallow Water Simulations
Publisher: American Meteorological Society
Abstract: Sea Level variations of the Indian Ocean north of 20°S are analyzed from Geosat satellite altimeter data over April 1985?September 1989. These variations are compared and interpreted with numerical simulations derived from ...
Variability of the Tropical Atlantic Ocean Simulated by a General Circulation Model with Two Different Mixed-Layer Physics
Publisher: American Meteorological Society
Abstract: The embedment of a 1.5 turbulence closure model in an ocean general circulation model of the equatorial Atlantic is presented. The eddy viscosity and diffusivity involved in the vertical mixing are defined as the product ...
An OGCM Study for the TOGA Decade. Part I: Role of Salinity in the Physics of the Western Pacific Fresh Pool
Publisher: American Meteorological Society
Abstract: A set of numerical simulations of the tropical Pacific Ocean during the 1985?94 decade is used to investigate the effects of haline stratification on the low-frequency equilibrium of the Coupled Ocean?Atmosphere Response ...
An OGCM Study for the TOGA Decade. Part II: Barrier-Layer Formation and Variability
Publisher: American Meteorological Society
Abstract: A set of OGCM experiments is used to investigate the processes responsible for barrier layer (BL) formation in the Pacific Ocean. As in existing datasets, BL appears in the present experiments both in the western Pacific ...
The Deep Interior Downwelling, the Veronis Effect, and Mesoscale Tracer Transport Parameterizations in an OGCM
Publisher: American Meteorological Society
Abstract: Numerous numerical simulations of basin-scale ocean circulation display a vast interior downwelling and a companion intense western boundary layer upwelling at midlatitude below the thermocline. These features, related to ...
A Three-Dimensional Numerical Study of Deep-Water Formation in the Northwestern Mediterranean Sea
Publisher: American Meteorological Society
Abstract: Deep-water formation (DWF) in the northwestern Mediterranean Sea and the subsequent horizontal circulation are investigated in a rectangular basin with a three-dimensional primitive equation model. The basin is forced by ...
Large-Scale Preconditioning of Deep-Water Formation in the Northwestern Mediterranean Sea
Publisher: American Meteorological Society
Abstract: The large-scale processes preconditioning the winter deep-water formation in the northwestern Mediterranean Sea are investigated with a primitive equation numerical model where convection is parameterized by a non-penetrative ...
Adjustment of Near-Equatorial Wind Stress with Four-Dimensional Variational Data Assimilation in a Model of the Pacific Ocean
Publisher: American Meteorological Society
Abstract: A four-dimensional variational scheme is described in which ocean observations are assimilated into an ocean general circulation model using wind stress forcing fields as control variables. Idealized (?twin?) experiments ...
Mechanisms for ENSO Phase Change in a Coupled GCM
Publisher: American Meteorological Society
Abstract: The mechanisms leading to El Niño onset and termination in the ECHAM4/OPA coupled GCM are assessed and compared to observations and existing ENSO paradigms. At the equator as well as off equator, the patterns and timing ...
The March 1997 Westerly Wind Event and the Onset of the 1997/98 El Niño: Understanding the Role of the Atmospheric Response
Publisher: American Meteorological Society
Abstract: In a previous study, the effect of the March 1997 Westerly Wind Event (WWE) on the evolution of the tropical Pacific Ocean was studied using an ocean general circulation model (GCM). The response was characterized by (i) ...