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RISMechanisms of the Tropical Upwelling Branch of the Brewer–Dobson Circulation: The Role of Extratropical Waves
Publisher: American Meteorological Society
Abstract: he role of extratropical waves in the tropical upwelling branch of the Brewer?Dobson circulation is investigated in an idealized model of the stratosphere and troposphere. To simulate different stratospheric seasonal cycles ...
The Role of Stratospheric Polar Vortex Breakdown in Southern Hemisphere Climate Trends
Publisher: American Meteorological Society
Abstract: his paper investigates the connection between the delay in the final breakdown of the stratospheric polar vortex, the stratospheric final warming (SFW), and Southern Hemisphere climate trends. The authors first analyze ...
Barotropic and Baroclinic Eddy Feedbacks in the Midlatitude Jet Variability and Responses to Climate Change–Like Thermal Forcings
Publisher: American Meteorological Society
Abstract: tudies have suggested that the persistence in the meridional vacillation of the midlatitude jet (i.e., annular mode time scale) in comprehensive climate models is related to the model biases in climatological jet latitude, ...
The Predictability of Stratospheric Warming Events: More from the Troposphere or the Stratosphere?
Publisher: American Meteorological Society
Abstract: he roles of the stratosphere and the troposphere in determining the predictability of stratospheric final warming and sudden warming events are evaluated in an idealized atmospheric model. For each stratospheric warming ...
The Role of Planetary Waves in the Downward Influence of Stratospheric Final Warming Events
Publisher: American Meteorological Society
Abstract: tratospheric final warming events are simulated in an idealized atmospheric model by imposing a winter-to-summer transition in radiative equilibrium temperature only in the stratosphere. Large ensembles of events are ...
Sensitivities and Mechanisms of the Zonal Mean Atmospheric Circulation Response to Tropical Warming
Publisher: American Meteorological Society
Abstract: lthough El Niño and global warming are both characterized by warming in the tropical upper troposphere, the latitudinal changes of the Hadley cell edge and midlatitude eddy-driven jet are opposite in sign. Using an idealized ...
Reduced Risk of North American Cold Extremes due to Continued Arctic Sea Ice Loss
Publisher: American Meteorological Society
Abstract: n early January 2014, an Arctic air outbreak brought extreme cold and heavy snowfall to central and eastern North America, causing widespread disruption and monetary losses. The media extensively reported the cold snap, ...
Delineating the Eddy–Zonal Flow Interaction in the Atmospheric Circulation Response to Climate Forcing: Uniform SST Warming in an Idealized Aquaplanet Model
Publisher: American Meteorological Society
Abstract: he mechanisms of the atmospheric response to climate forcing are analyzed using an example of uniform SST warming in an idealized aquaplanet model. A 200-member ensemble of experiments is conducted with an instantaneous ...
Evolution of the Global Coupled Climate Response to Arctic Sea Ice Loss during 1990–2090 and Its Contribution to Climate Change
Publisher: American Meteorological Society
Abstract: AbstractThe role of transient Arctic sea ice loss in the projected greenhouse gas?induced late-twentieth- to late-twenty-first-century climate change is investigated using the Geophysical Fluid Dynamics Laboratory?s Coupled ...
Separating the Mechanisms of Transient Responses to Stratospheric Ozone Depletion–Like Cooling in an Idealized Atmospheric Model
Publisher: American Meteorological Society
Abstract: revious studies have suggested that Southern Hemisphere (SH) summertime trends in the atmospheric circulation in the second half of the twentieth century are mainly driven by stratospheric ozone depletion in spring. Here, ...