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RISOcean Response to Wind Variations, Warm Water Volume, and Simple Models of ENSO in the Low-Frequency Approximation
Publisher: American Meteorological Society
Abstract: Physical processes that control ENSO are relatively fast. For instance, it takes only several months for a Kelvin wave to cross the Pacific basin (Tk ≈ 2 months), while Rossby waves travel the same distance in about half ...
Net Energy Dissipation Rates in the Tropical Ocean and ENSO Dynamics
Publisher: American Meteorological Society
Abstract: How unstable is the tropical ocean?atmosphere system? Are two successive El Niño events independent, or are they part of a continual (perhaps weakly damped) cycle sustained by random atmospheric disturbances? How important ...
The Ventilated Ocean
Publisher: American Meteorological Society
Abstract: diabatic theories of ocean circulation and density structure have a long tradition, from the concept of the ventilated thermocline to the notion that deep ocean ventilation is controlled by westerly winds over the Southern ...
Predictability and Decadal Variability of the North Atlantic Ocean State Evaluated from a Realistic Ocean Model
Publisher: American Meteorological Society
Abstract: AbstractThis study investigates the excitation of decadal variability and predictability of the ocean climate state in the North Atlantic. Specifically, initial linear optimal perturbations (LOPs) in temperature and salinity ...
Millennial Variability in an Idealized Ocean Model: Predicting the AMOC Regime Shifts
Publisher: American Meteorological Society
Abstract: salient feature of paleorecords of the last glacial interval in the North Atlantic is pronounced millennial variability, commonly known as Dansgaard?Oeschger events. It is believed that these events are related to variations ...
The Leading, Interdecadal Eigenmode of the Atlantic Meridional Overturning Circulation in a Realistic Ocean Model
Publisher: American Meteorological Society
Abstract: ariations in the strength of the Atlantic meridional overturning circulation (AMOC) are a major potential source of decadal and longer climate variability in the Atlantic. This study analyzes continuous integrations of ...
Model Bias Reduction and the Limits of Oceanic Decadal Predictability: Importance of the Deep Ocean
Publisher: American Meteorological Society
Abstract: cean general circulation models (GCMs), as part of comprehensive climate models, are extensively used for experimental decadal climate prediction. Understanding the limits of decadal ocean predictability is critical for ...
The Eastern Subtropical Pacific Origin of the Equatorial Cold Bias in Climate Models: A Lagrangian Perspective
Publisher: American Meteorological Society
Abstract: AbstractGlobal climate models frequently exhibit cold biases in tropical sea surface temperature (SST) in the central and eastern equatorial Pacific. Here, Lagrangian particle back trajectories are used to investigate the ...
Propagation and Breaking of Nonlinear Kelvin Waves
Publisher: American Meteorological Society
Abstract: The evolution of nonlinear Kelvin waves is studied using analytical and numerical methods. In the absence of dispersive (nonhydrostatic) effects, such waves may evolve to braking. The authors find that one of the effects ...
How Much Energy Is Transferred from the Winds to the Thermocline on ENSO Time Scales?
Publisher: American Meteorological Society
Abstract: The dynamics of El Niño?Southern Oscillation (ENSO) are studied in terms of the balance between energy input from the winds (via wind power) and changes in the storage of available potential energy in the tropical ocean. ...