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RISStratospheric versus Tropospheric Control of the Strength and Structure of the Brewer–Dobson Circulation
Publisher: American Meteorological Society
Abstract: he strength and structure of the Brewer?Dobson circulation (BDC) are explored in an idealized general circulation model. It is shown that diabatic forcing of the stratosphere and planetary wave forcing by the troposphere ...
On the Zonal Structure of the North Atlantic Oscillation and Annular Modes
Publisher: American Meteorological Society
Abstract: The zonal structure and dynamics of the dipolar patterns of intraseasonal variability in the extratropical atmosphere?namely, the North Atlantic Oscillation (NAO) and the so-called annular modes of variability?are investigated ...
Stratosphere–Troposphere Coupling in a Relatively Simple AGCM: The Importance of Stratospheric Variability
Publisher: American Meteorological Society
Abstract: The impact of stratospheric variability on the dynamical coupling between the stratosphere and the troposphere is explored in a relatively simple atmospheric general circulation model. Variability of the model?s stratospheric ...
What Makes an Annular Mode “Annular”?
Publisher: American Meteorological Society
Abstract: AbstractAnnular patterns with a high degree of zonal symmetry play a prominent role in the natural variability of the atmospheric circulation and its response to external forcing. But despite their apparent importance for ...
Quantifying the Summertime Response of the Austral Jet Stream and Hadley Cell to Stratospheric Ozone and Greenhouse Gases
Publisher: American Meteorological Society
Abstract: he impact of anthropogenic forcing on the summertime austral circulation is assessed across three climate model datasets: the Chemistry?Climate Model Validation activity 2 and phases 3 and 5 of the Coupled Model Intercomparison ...
Eddy–Zonal Flow Interactions and the Persistence of the Zonal Index
Publisher: American Meteorological Society
Abstract: An idealized atmospheric general circulation model is used to investigate the factors controlling the time scale of intraseasonal (10?100 day) variability of the extratropical atmosphere. Persistence on these time scales ...
A Stochastic Model for the Spatial Structure of Annular Patterns of Variability and the North Atlantic Oscillation
Publisher: American Meteorological Society
Abstract: Meridional dipoles of zonal wind and geopotential height are found extensively in empirical orthogonal function (EOF) analysis and single-point correlation maps of observations and models. Notable examples are the North ...
Optimizing the Definition of a Sudden Stratospheric Warming
Publisher: American Meteorological Society
Abstract: AbstractVarious criteria exist for determining the occurrence of a major sudden stratospheric warming (SSW), but the most common is based on the reversal of the climatological westerly zonal-mean zonal winds at 60° latitude ...
Scaling for Saturated Moist Quasigeostrophic Turbulence
Publisher: American Meteorological Society
What Drives the Brewer–Dobson Circulation?
Publisher: American Meteorological Society
Abstract: ecent studies have revealed strong interactions between resolved Rossby wave and parameterized gravity wave driving in stratosphere-resolving atmospheric models. Perturbations to the parameterized wave driving are often ...