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RISThe Response of Westerly Jets to Thermal Driving in a Primitive Equation Model
Publisher: American Meteorological Society
Abstract: The structure of westerly jets in a statistically steady state is investigated with both dry and moist models on the sphere. The dry model is forced with an idealized radiative equilibrium temperature profile that consists ...
Intraseasonal Variability of the Zonal-Mean Tropical Tropopause Height
Publisher: American Meteorological Society
Abstract: Intraseasonal variability of the zonal-mean tropical tropopause height is shown to be modulated by localized tropical convection. Most of this convective activity is identified as being part of the Madden?Julian oscillation. ...
Formation and Maintenance of the Tropical Cold-Point Tropopause in a Dry Dynamic-Core GCM
Publisher: American Meteorological Society
Abstract: he formation of the tropical cold-point tropopause (CPT) is examined using a dry primitive equation model driven by the Held?Suarez forcing. Without moist and realistic radiative processes, the dry model successfully ...
Impact of Antarctic Ozone Depletion and Recovery on Southern Hemisphere Precipitation, Evaporation, and Extreme Changes
Publisher: American Meteorological Society
Abstract: he possible impact of Antarctic ozone depletion and recovery on Southern Hemisphere (SH) mean and extreme precipitation and evaporation is examined using multimodel output from the Climate Model Intercomparison Project 3 ...
Tropical Cold-Point Tropopause: Climatology, Seasonal Cycle, and Intraseasonal Variability Derived from COSMIC GPS Radio Occultation Measurements
Publisher: American Meteorological Society
Abstract: he finescale structure of the tropical cold-point tropopause (CPT) is examined using high-resolution temperature profiles derived from Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) global ...
Preferred Modes of Variability and Their Relationship with Climate Change
Publisher: American Meteorological Society
Abstract: Spatial structure of annular modes shows a remarkable resemblance to that of the recent trend in the observed circulation (Thompson et al.). This study performs a series of multilevel primitive equation model simulations ...
Onset of Circulation Anomalies during Stratospheric Vortex Weakening Events: The Role of Planetary-Scale Waves
Publisher: American Meteorological Society
Abstract: o highlight the details of stratosphere?troposphere dynamical coupling during the onset of strong polar vortex variability, this study identifies stratospheric vortex weakening (SVW) events by rapid deceleration of the ...
Revisiting the ENSO–SSW Relationship
Publisher: American Meteorological Society
Abstract: AbstractStratospheric sudden warming (SSW) events exhibit pronounced interannual variability. Based on zonal wind reversals at 60°N and 10 hPa, it has been suggested that SSW events occur more preferentially during El ...
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 ...
Breakdown of the Linear Relationship between the Southern Hemisphere Hadley Cell Edge and Jet Latitude Changes in the Last Glacial Maximum
Publisher: American Meteorological Society
Abstract: A poleward displacement of the Hadley cell (HC) edge and the eddy-driven jet latitude has been observed in the Southern Hemisphere (SH) during the last few decades. This change is further projected to continue in the future, ...