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RISTwo Regimes of the Equatorial Warm Pool. Part II: Hybrid Coupled GCM Experiments
Publisher: American Meteorological Society
Abstract: In this second of a two-part study, the two regimes in a simple tropical climate model identified in Part I are verified using a hybrid coupled general circulation model (HCM) that can reproduce the observed climatology ...
Two Regimes of the Equatorial Warm Pool. Part I: A Simple Tropical Climate Model
Publisher: American Meteorological Society
Abstract: Atmosphere?ocean coupled processes responsible for generating and maintaining the equatorial warm pool were investigated using models of different complexities. The primary focus was to answer the following question: why ...
Asian Jet Waveguide and a Downstream Extension of the North Atlantic Oscillation
Publisher: American Meteorological Society
Abstract: Anomalous atmospheric fields associated with the North Atlantic Oscillation (NAO) are analyzed on interannual and intraseasonal time scales in order to examine the extent to which the NAO is a regional phenomenon. Analyses ...
Forcing Processes of the Summertime Circumglobal Teleconnection Pattern in a Dry AGCM
Publisher: American Meteorological Society
Abstract: To better understand the predictability of the wavelike circumglobal teleconnection (CGT) pattern prevailing during boreal summer, two sets of experiments are performed using a nonlinear dry atmospheric model. Each experiment ...
Atmospheric Boundary Layer Response to Mesoscale SST Anomalies in the Kuroshio Extension
Publisher: American Meteorological Society
Abstract: The atmospheric boundary layer (ABL) response to mesoscale eddies in sea surface temperature (SST) in the Kuroshio Extension was investigated using a high-resolution (T213L30) atmospheric general circulation model. A control ...
Role of the Indo-Pacific Interbasin Coupling in Predicting Asymmetric ENSO Transition and Duration
Publisher: American Meteorological Society
Abstract: arm and cold phases of El Niño?Southern Oscillation (ENSO) exhibit a significant asymmetry in their transition/duration such that El Niño tends to shift rapidly to La Niña after the mature phase, whereas La Niña tends to ...
Relative Impacts of Snow and Sea Surface Temperature Anomalies on an Extreme Phase in the Winter Atmospheric Circulation
Publisher: American Meteorological Society
Abstract: In association with extreme anomalies in the extratropical atmosphere, numerical experiments using an atmospheric general circulation model are performed to investigate the relative impact of the anomalous snow with SST ...
Decadal Changes in the Atmospheric Circulation and Associated Surface Climate Variations in the Northern Hemisphere Winter
Publisher: American Meteorological Society
Abstract: This study attempts to investigate decadal-scale climate changes in the mid- and high latitudes of the Northern Hemisphere in winter 1989 by using various observational data for atmospheric parameters, sea surface temperature ...
ENSO Complexity Induced by State Dependence of Westerly Wind Events
Publisher: American Meteorological Society
Abstract: oupled dynamics between westerly wind events (WWEs) and the El Niño?Southern Oscillation (ENSO) is examined using an atmosphere?ocean coupled model with intermediate complexity. The model incorporates state-dependent ...
Reducing Forecast Errors Due to Model Imperfections Using Ensemble Kalman Filtering
Publisher: American Meteorological Society
Abstract: A method is introduced for reducing forecast errors in an extended-range to one-month forecast based on an ensemble Kalman filter (EnKF). The prediction skill in such a forecast is typically affected not only by the accuracy ...