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RISDeducing Anomalous Wave Source Regions during the Life Cycles of Persistent Flow Anomalies
Publisher: American Meteorological Society
Abstract: Anomalous wave source regions are identified during the life cycles of persistent flow anomalies occurring over the North Pacific and North Atlantic Oceans during boreal winter. These cases project strongly upon the ...
Stratospheric Forcing of Surface Climate in the Arctic Oscillation
Publisher: American Meteorological Society
Abstract: Diagnostic results are presented indicating that during the Arctic oscillation surface climate variations are directly forced by changes in the strength of the stratospheric polar vortex. To be specific, large-scale potential ...
Characterizing Arctic Spring Onset
Publisher: American Meteorological Society
Abstract: he high-latitude atmosphere experiences a rapid state transition during Arctic spring onset (ASO) with distinct warming in surface 2-m air temperature (T2m) occurring over broad geographical regions. Three methods are ...
The Dynamics of Large-Scale Cyclogenesis over the North Pacific Ocean
Publisher: American Meteorological Society
Abstract: Earlier studies of persistent large-scale flow anomalies have been extended, with the aim of identifying the primary mechanisms for persistent anomaly development. In this study the focus is on wintertime cases of persistent ...
Submonthly Polar Vortex Variability and Stratosphere–Troposphere Coupling in the Arctic
Publisher: American Meteorological Society
Abstract: A principal component analysis is performed to characterize intraseasonal variability in the boreal stratospheric polar vortex. In contrast to previous studies, the current analysis examines daily zonal-mean variability ...
Interannual Variability in the Southern Hemisphere Circulation Organized by Stratospheric Final Warming Events
Publisher: American Meteorological Society
Abstract: A composite observational analysis is presented demonstrating that austral stratospheric final warming (SFW) events provide a substantial organizing influence upon the large-scale atmospheric circulation in the Southern ...
The Dynamics of Northern Hemisphere Stratospheric Final Warming Events
Publisher: American Meteorological Society
Abstract: A lag composite analysis is performed of the zonal-mean structure and dynamics of Northern Hemisphere stratospheric final warming (SFW) events. SFW events are linked to distinct zonal wind deceleration signatures in the ...
Life Cycles of Persistent Anomalies. Part II: The Development of Persistent Negative Height Anomalies over the North Pacific Ocean
Publisher: American Meteorological Society
Abstract: The present study extends our previous work on the life cycles of persistent anomalies by providing more comprehensive analyses of the synoptic and dynamical characteristics associated with the developments of the anomalies. ...
A Dynamical and Statistical Characterization of U.S. Extreme Precipitation Events and Their Associated Large-Scale Meteorological Patterns
Publisher: American Meteorological Society
Abstract: AbstractRegional patterns of extreme precipitation events occurring over the continental United States are identified via hierarchical cluster analysis of observed daily precipitation for the period 1950?2005. Six canonical ...
The Statistics and Horizontal Structure of Anomalous Weather Regimes in the Community Climate Model
Publisher: American Meteorological Society
Abstract: The statistics, horizontal structure, and linear barotropic dynamics of anomalous weather regimes are evaluated in a 15-winter integration of the NCAR Community Climate Model (CCM2). Statistical and ensemble analyses of ...