Article: Westerly Wind Bursts and Their Relationship with Intraseasonal Variations and ENSO. Part II: Energetics over the Western and Central Pacific

ABSTRACT

The mechanism of synoptic-scale eddy development in the generation of westerly wind bursts (WWBs) over the western-central Pacific, and their relationship with the El Niño-Southern Oscillation (ENSO) and the Madden-Julian oscillation (MJO), were examined. In the WWB occurrences, barotropic structures of equatorial eddy westerlies with cyclonic disturbances were found from the surface to the upper troposphere. The dominant contributions to substantial eddy kinetic energy (EKE) were the barotropic energy conversion (KmKe) in the lower and middle tropospheres and the conversion from eddy available potential energy (PeKe) in the upper troposphere. Low-frequency environmental ...

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