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RISA Multiwave Model of the Quasi-biennial Oscillation
Publisher: American Meteorological Society
Abstract: A simple one-dimensional model of the quasi-biennial oscillation is discussed. Our model is essentially a generalization of the Holton?Lindzen models. We consider a large number of vertically propagating internal waves ...
Equatorial Superrotation and Maintenance of the General Circulation in Two-Level Models
Publisher: American Meteorological Society
Abstract: Suarez and Duffy have noted an interesting bifurcation in a two-level gridpoint general circulation model when strong tropical heating is imposed. This bifurcation results in a model climatology with strong upper-level ...
Atmospheric Low-Frequency Variability and Its Relationship to Midlatitude SST Variability: Studies Using the NCAR Climate System Model
Publisher: American Meteorological Society
Abstract: The characteristics of atmospheric low-frequency variability and midlatitude SST variability as simulated by the National Center for Atmospheric Research?s Climate System Model are analyzed in the vicinity of the North ...
Sensitivity of the Thermohaline Circulation to Surface Buoyancy Forcing in a Two-Dimensional Ocean Model
Publisher: American Meteorological Society
Abstract: The performance of thermal surface boundary conditions based on energy balance models for the atmosphere is tested using a two-dimensional (meridional plane) ocean model. The results are compared to those from an idealized ...
Interaction between Tropical Atlantic Variability and El Niño–Southern Oscillation
Publisher: American Meteorological Society
Abstract: The interaction between tropical Atlantic variability and El Niño?Southern Oscillation (ENSO) is investigated using three ensembles of atmospheric general circulation model integrations. The integrations are forced by ...
The Three-Dimensional Structure of Breaking Rossby Waves in the Polar Wintertime Stratosphere
Publisher: American Meteorological Society
Abstract: The three-dimensional nature of breaking Rossby waves in the polar wintertime stratosphere is studied using an idealized global primitive equation model. The model is initialized with a well-formed polar vortex, characterized ...
Free and Forced Variability of the Tropical Atlantic Ocean: Role of the Wind–Evaporation–Sea Surface Temperature Feedback
Publisher: American Meteorological Society
Abstract: The role of the wind?evaporation?sea surface temperature (WES) feedback in the low-frequency natural variability of the tropical Atlantic is studied using an atmospheric global climate model?the NCAR Community Climate ...
Influence of Mean Flow on the ENSO–Vertical Wind Shear Relationship over the Northern Tropical Atlantic
Publisher: American Meteorological Society
Abstract: ertical wind shear over the tropical Atlantic Ocean plays an important role in mediating hurricane activity. The vertical shear variability over the main development region for Atlantic hurricanes is affected by local ...
Stochasticity and Spatial Resonance in Interdecadal Climate Fluctuations
Publisher: American Meteorological Society
Abstract: Ocean?atmosphere interaction plays a key role in climate fluctuations on interdecadal timescales. In this study, different aspects of this interaction are investigated using an idealized ocean?atmosphere model, and a ...
Advective Ocean–Atmosphere Interaction: An Analytical Stochastic Model with Implications for Decadal Variability
Publisher: American Meteorological Society
Abstract: Atmospheric variability on timescales of a month or longer is dominated by a small number of large-scale spatial patterns (?teleconnections?), whose time evolution has a significant stochastic component because of weather ...