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RISMJO Initiation in the Real-Time Multivariate MJO Index
Publisher: American Meteorological Society
Abstract: adden?Julian oscillation (MJO) initiation in the real-time multivariate MJO (RMM) index is explored through an analysis of observed case studies and composite events. Specific examples illustrate that both the dates of MJO ...
Observations of a Convectively Coupled Kelvin Wave in the Eastern Pacific ITCZ
Publisher: American Meteorological Society
Abstract: A case study of a convectively coupled Kelvin wave in the eastern Pacific intertropical convergence zone (ITCZ) is presented, as observed during the 1997 Pan American Climate Studies (PACS) Tropical Eastern Pacific Process ...
Interactions between the Boreal Summer Intraseasonal Oscillation and Higher-Frequency Tropical Wave Activity
Publisher: American Meteorological Society
Abstract: Interactions between the convection and circulation fields of the boreal summer intraseasonal oscillation (ISO) and two types of higher-frequency tropical wave activity are examined through a statistical analysis of 22 yr ...
Extratropical Forcing of Convectively Coupled Kelvin Waves during Austral Winter
Publisher: American Meteorological Society
Abstract: Observations are presented that link extratropical Rossby wave disturbances excited in the Southern Hemisphere subtropical jet to the initiation of convectively coupled Kelvin waves in the Pacific intertropical convergence ...
The Observed Structure of Convectively Coupled Kelvin Waves: Comparison with Simple Models of Coupled Wave Instability
Publisher: American Meteorological Society
Abstract: Observations of the horizontal and vertical structure of convectively coupled Kelvin waves are presented and are compared with the predicted structures of moist Kelvin (or gravity) waves in three simple models of coupled ...
An Analysis of Convectively Coupled Kelvin Waves in 20 WCRP CMIP3 Global Coupled Climate Models
Publisher: American Meteorological Society
Abstract: Output from 20 coupled global climate models is analyzed to determine whether convectively coupled Kelvin waves exist in the models, and, if so, how their horizontal and vertical structures compare to observations. Model ...
Zonal and Vertical Structure of the Madden–Julian Oscillation
Publisher: American Meteorological Society
Abstract: A statistical study of the three-dimensional structure of the Madden?Julian oscillation (MJO) is carried out by projecting dynamical fields from reanalysis and radiosonde data onto space?time filtered outgoing longwave ...
A Model for Convectively Coupled Tropical Waves: Nonlinearity, Rotation, and Comparison with Observations
Publisher: American Meteorological Society
Abstract: Recent observational analysis of both individual realizations and statistical ensembles identifies moist convectively coupled Kelvin waves in the Tropics with supercluster envelopes of convection. This observational analysis ...
A Comparison of OLR and Circulation-Based Indices for Tracking the MJO
Publisher: American Meteorological Society
Abstract: wo univariate indices of the Madden?Julian oscillation (MJO) based on outgoing longwave radiation (OLR) are developed to track the convective component of the MJO while taking into account the seasonal cycle. These are ...